MAX4188ESD+ [MAXIM]
Single/Triple, Low-Glitch, 250MHz, Current-Feedback Amplifiers with High-Speed Disable; 单/三路，低毛刺， 250MHz的电流反馈放大器，带有高速禁止
| 型号： | MAX4188ESD+ |
| 厂家： | 
MAXIM INTEGRATED PRODUCTS |
| 描述： | Single/Triple, Low-Glitch, 250MHz, Current-Feedback Amplifiers with High-Speed Disable |
| 文件： | 总23页 (文件大小：774K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
19-1369; Rev 1; 2/07
Single/Triple, Low-Glitch, 250MHz, Current-
Feedback Amplifiers with High-Speed Disable
General Description
Features
♦ Low Supply Current: 1.5mA per Amplifier
The MAX4188/MAX4189/MAX4190 are low-power,
current-feedback video amplifiers featuring fast dis-
able/enable times and low switching transients. The
triple MAX4188 and the single MAX4190 are optimized
for applications with closed-loop gains of +2V/V (6dB)
or greater and provide a -3dB bandwidth of 200MHz
and 185MHz, respectively. The triple MAX4189 is opti-
mized for closed-loop applications with gains of +1V/V
(0dB) or greater and provides a 250MHz -3dB band-
width. These amplifiers feature 0.1dB gain flatness up to
80MHz with differential gain and phase errors of 0.03%
and 0.05°. These features make the MAX4188 family
ideal for video applications.
♦ Fast Enable/Disable Times: 120ns/35ns
♦ Very Low Switching Transient: 45mV
p-p
♦ High Speed
200MHz -3dB Small-Signal Bandwidth
(MAX4188, A
≥ +2)
VCL
250MHz -3dB Small-Signal Bandwidth
(MAX4189, A ≥ +1)
VCL
185MHz -3dB Small-Signal Bandwidth
(MAX4190, A ≥ +2)
VCL
♦ High Slew Rate
The MAX4188/MAX4189/MAX4190 operate from a +5V
single supply or from 2.25V to 5.5V dual supplies.
These amplifiers consume only 1.5mA per amplifier and
are capable of delivering 55mA of output current, making
them ideal for portable and battery-powered equipment.
350V/µs (MAX4188, A
175V/µs (MAX4189, A
≥ +2)
≥ +1)
VCL
VCL
♦ Excellent Video Specifications
85MHz -0.1dB Gain Flatness (MAX4190)
30MHz -0.1dB Gain Flatness (MAX4189)
Differential Gain/Phase Errors
0.03%/0.05° (MAX4188)
The MAX4188/MAX4189/MAX4190 have a high-speed
disable/enable mode that isolates the inputs, places the
outputs in a high-impedance state, and reduces the
supply current to 450µA per amplifier. Each amplifier
can be disabled independently. High off isolation, low
switching transient, and fast enable/disable times
(120ns/35ns) allow these amplifiers to be used in a
wide range of multiplexer applications. A settling time
of 22ns to 0.1%, a slew rate of up to 350V/µs, and low
distortion make these devices useful in many general-
purpose, high-speed applications.
♦ Low-Power Disable Mode
Inputs Isolated, Outputs Placed in High-Z
Supply Current Reduced to 450µA per Amplifier
♦ Fast Settling Time of 22ns to 0.1%
♦ Low Distortion
70dB SFDR (f = 5MHz, V = 2V , MAX4188)
c
O
p-p
♦ Available in Space-Saving Packages
16-Pin QSOP (MAX4188/MAX4189)
8-Pin µMAX (MAX4190)
The MAX4188/MAX4189 are available in a tiny 16-pin
QSOP package, and the MAX4190 is available in a
®
space-saving 8-pin µMAX package.
Ordering Information
Applications
High-Definition Surveillance Video
PIN-
PACKAGE
PKG
CODE
PART
TEMP RANGE
High-Speed Switching/Multiplexing
MAX4188ESD+
-40°C to +85°C 14 SO
S14-1
E16-1
Portable/Battery-Powered Video/Multimedia
Systems
MAX4188EEE+
-40°C to +85°C 16 QSOP
Ordering Information continued at end of data sheet.
High-Speed Analog-to-Digital Buffers
Medical Imaging
+Denotes lead-free package.
Selector Guide
High-Speed Signal Processing
Professional Cameras
OPTIMIZED
FOR:
AMPLIFIERS
PART
PIN-PACKAGE
PER PKG.
CCD Imaging Systems
14-pin SO,
16-pin QSOP
MAX4188
A
≥ +2V/V
3
V
RGB Distribution Amplifiers
14-pin SO,
16-pin QSOP
MAX4189
MAX4190
A
A
≥ +1V/V
≥ +2V/V
3
1
Pin Configuration appears at end of data sheet.
V
V
8-pin µMAX/SO
µMAX is a registered trademark of Maxim Integrated Products, Inc.
________________________________________________________________ Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
Single/Triple, Low-Glitch, 250MHz, Current-
Feedback Amplifiers with High-Speed Disable
ABSOLUTE MAXIMUM RATINGS
Supply Voltage (V
IN_+, IN_-, DISABLE_ Voltage.........(V - 0.3V) to (V
Differential Input Voltage (IN_+ to IN_-).............................. 1.5V
Maximum Current into IN_+ or IN_-.................................. 10mA
Output Short-Circuit Current Duration........................Continuous
to V )................................................+12V
14-Pin SO (derate 8.3mW/°C above +70°C) ..................667mW
16-Pin QSOP (derate 8.3mW/°C above +70°C)...............667mW
Operating Temperature Range............................-40°C to +85°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
CC
EE
+ 0.3V)
EE
CC
Continuous Power Dissipation (T = +70°C)
A
8-Pin SO (derate 5.88mW/°C above +70°C)...............471mW
8-Pin µMAX (derate 4.1mW/°C above +70°C)............330mW
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
DC ELECTRICAL CHARACTERISTICS—Dual Supplies
(V
R
= +5V; V = -5V; IN+ = 0V; DISABLE_ ≥ 3.2V; MAX4188: A = +2V/V, R = R = 910Ω for R = 1kΩ and R = R = 560Ω for
F G
EE V F G L
CC
L
= 150Ω; MAX4189: A = +1V/V, R = 1600Ω for R = 1kΩ and R = 1100Ω for R = 150Ω; MAX4190: A = +2V/V, R = R
=
F
L
V
F
L
V
F
G
1300Ω for R = 1kΩ, R = R = 680Ω for R = 150Ω; T = T
to T
, unless otherwise noted. Typical values are specified at
A
L
F
G
L
MIN
MAX
T
A
= +25°C.)
PARAMETER
SYMBOL
CONDITIONS
MIN
2.25
3.1
TYP
MAX
UNITS
V
Operating Supply Voltage
Input Voltage Range
Inferred from PSRR tests
Guaranteed by CMRR test
5.5
V
3.4
1
V
CM
Input Offset Voltage
V
V
= 0V (Note 1)
6
mV
µV/°C
mV
µA
OS
CM
Input Offset Voltage Tempco
TC
10
1
VOS
Input Offset Voltage Matching
Input Bias Current (Positive Input)
Input Bias Current (Negative Input)
Input Resistance (Positive Input)
Input Resistance (Negative Input)
Input Capacitance (Positive Input)
Common-Mode Rejection Ratio
I
1
10
12
B+
I
2
µA
B-
R
100
350
300
2.5
68
7
kΩ
Ω
-3.1V ≤ V
≤ 3.1V, ⎥ V + - V -⎥ ≤ 1V
IN IN
IN+
CM
R
IN-
C
IN
pF
CMRR
-3.1V ≤ V
-3.1V ≤ V
-2.8V ≤ V
≤ 3.1V
56
1
dB
CM
≤ 3.1V, R = 1kΩ
L
OUT
OUT
Open-Loop Transresistance
Output-Voltage Swing
T
R
MΩ
≤ 2.8V, R = 150Ω
0.3
3.5
3.0
20
2
L
R = 1kΩ
4.0
3.3
55
60
0.2
0.8
5
L
V
SW
V
R = 150Ω
L
Output Current
I
R = 30Ω
mA
mA
Ω
L
OUT
Output Short-Circuit Current
Output Resistance
I
SC
R
OUT
Disabled Output Leakage Current
Disabled Output Capacitance
DISABLE Low Threshold
DISABLE High Threshold
DISABLE Input Current
I
5
µA
pF
V
DISABLE_ ≤ V , V
≤
≤
3.5V (Note 2)
3.5V
OUT(OFF)
IL OUT
C
DISABLE_ ≤ V , V
OUT(OFF)
IL OUT
V
IL
(Note 3)
(Note 3)
V
- 3
CC
2
V
IH
V
- 1.8
CC
V
I
0.1
75
µA
dB
dB
mA
mA
V
V
V
≤ DISABLE_ ≤ V
CC
IN
EE
EE
CC
Power-Supply Rejection Ratio (V
)
PSRR+
PSRR-
= -5V, V
= 4.5V to 5.5V
60
60
CC
CC
Power-Supply Rejection Ratio (V
)
= 5V, V = -4.5V to -5.5V
73
EE
EE
Quiescent Supply Current (per Amplifier)
Disabled Supply Current (per Amplifier)
I
R = open
L
1.5
0.45
1.85
0.65
S
I
DISABLE_ ≤ V , R = open
S(OFF)
IL
L
2
_______________________________________________________________________________________
Single/Triple, Low-Glitch, 250MHz, Current-
Feedback Amplifiers with High-Speed Disable
DC ELECTRICAL CHARACTERISTICS—Single Supply
(V
= +5V; V = 0V; IN+ = 2.5V; DISABLE_ ≥ 3.2V; R to V
= 620Ω for R = 150Ω; MAX4189: A = +1V/V, R = 1500Ω for R = 1kΩ and R = 1600Ω for R = 150Ω; MAX4190: A = +2V/V,
L V F L F L
V
/ 2; MAX4188: A = +2V/V, R = R = 1.1kΩ for R = 1kΩ and R =
CC
EE
L
CC V F G L F
R
G
R = R = 1300Ω for R = 1kΩ, R = R = 680Ω for R = 150Ω; T = T
to T , unless otherwise noted. Typical values are speci-
MAX
A
MIN
F
G
L
F
G
L
fied at T = +25°C.)
A
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Operating Supply Voltage
Inferred from PSRR tests
4.5
5.5
V
1.6 to
3.4
1.3 to
3.7
Input Voltage Range
V
CM
Guaranteed by CMRR test
V
Input Offset Voltage
V
V
CM
= 2.5V (Note 1)
1.5
10
1
6.0
mV
µV/°C
mV
OS
Input Offset Voltage Tempco
Input Offset Voltage Matching
TC
VOS
Input Bias Current
(Positive Input)
I
1
2
10
12
µA
µA
kΩ
Ω
B+
Input Bias Current
(Negative Input)
I
B-
Input Resistance
(Positive Input)
R
1.6V ≤ V
≤ 3.4V, ⎥ V
- V ⎥ ≤ 1V
100
350
300
2.5
IN+
CM
IN+
IN-
Input Resistance
(Negative Input)
R
IN-
Input Capacitance
(Positive Input)
C
pF
dB
IN
Common-Mode Rejection Ratio
CMRR
1.5V ≤ V
1.3V ≤ V
≤ 3.5V
48
1.0
0.2
65
6.5
1.0
CM
≤ 3.7V, R = 1kΩ
OUT
L
Open-Loop Transresistance
T
MΩ
R
1.45V ≤ V
≤ 3.55V, R = 150Ω
L
OUT
1.2 to
3.8
0.9 to
4.1
R = 1kΩ
L
Output-Voltage Swing
V
V
SW
1.4 to 1.15 to
3.6
R = 150Ω
L
3.85
Output Current
I
R = 30Ω
L
16
28
mA
mA
Ω
OUT
Output Short-Circuit Current
Output Resistance
I
50
SC
R
0.2
OUT
Disabled Output Leakage
Current
I
0.8
5
5
µA
DISABLE_ ≤ V , 1.2V ≤ V
≤ 3.8V (Note 2)
≤ 3.8V
OUT(OFF)
IL
OUT
OUT
Disabled Output Capacitance
DISABLE Low Threshold
DISABLE High Threshold
DISABLE Input Current
C
pF
V
DISABLE_ ≤ V , 1.2V ≤ V
OUT(OFF)
IL
V
(Note 3)
(Note 3)
V
CC
- 3
IL
V
V
- 1.8
CC
V
IH
I
IN
0.1
75
2
µA
0V ≤ DISABLE_ ≤ V
CC
Power-Supply Rejection
PSRR+
V
CC
= 4.5V to 5.5V
60
dB
mA
mA
Ratio (V
)
CC
Quiescent Supply Current
(per Amplifier)
I
R = open
L
1.5
1.85
0.65
S
Disabled Supply Current
(per Amplifier)
I
0.45
DISABLE_ ≤ V , R = open
S(OFF)
IL
L
_______________________________________________________________________________________
3
Single/Triple, Low-Glitch, 250MHz, Current-
Feedback Amplifiers with High-Speed Disable
AC ELECTRICAL CHARACTERISTICS—Dual Supplies (MAX4188)
(V
= +5V, V = -5V, V = 0V, DISABLE_ ≥ 3V, A = +2V/V, R = R = 910Ω for R = 1kΩ or R = R = 560Ω for R = 150Ω;
F
G
CC
EE
IN
V
F
G
L
L
T = +25°C, unless otherwise noted.)
A
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
200
160
0.25
0.1
60
MAX
UNITS
R = 1kΩ
L
Small-Signal -3dB Bandwidth
BW
MHz
-3dB
R = 150Ω
L
R = 1kΩ
L
Peaking
dB
R = 150Ω
L
R = 1kΩ
L
Bandwidth for 0.1dB Flatness
Large-Signal -3dB Bandwidth
BW
MHz
MHz
0.1dB
R = 150Ω
L
80
R = 1kΩ
L
100
100
350
280
22
BW
V
OUT
= 2V
P-P
LS
R = 150Ω
L
Positive slew
Negative slew
V/µs
V
OUT
= 4V step,
Slew Rate
SR
R = 150Ω
L
Settling Time to 0.1%
Rise/Fall Time
t
V
= 4V step
= 4V step
ns
ns
S
OUT
OUT
Rise time
Fall time
10
V
12
R = 1kΩ
70
L
f
V
= 5MHz,
C
Spurious-Free Dynamic Range
Second Harmonic Distortion
Third Harmonic Distortion
Differential Phase Error
SFDR
dB
= 2V
OUT
P-P
R = 150Ω
L
56
R = 1kΩ
L
-70
-66
-73
-56
0.05
0.32
0.03
0.04
2
f
C
= 5MHz,
dBc
dBc
V
= 2V
OUT
P-P
R = 150Ω
L
R = 1kΩ
L
f
C
= 5MHz,
V
= 2V
OUT
P-P
R = 150Ω
L
R = 1kΩ
L
DP
NTSC
NTSC
degrees
R = 150Ω
L
R = 1kΩ
L
Differential Gain Error
DG
%
R = 150Ω
L
Input Noise-Voltage Density
Input Noise-Current Density
e
n
f = 10kHz
f = 10kHz
f = 10MHz
nV/√Hz
pA/√Hz
Positive input
Negative input
4
i
n
5
Output Impedance
Crosstalk
Z
4
Ω
dB
OUT
f = 10MHz, input referred
f = 10MHz, input referred
-55
-65
100
All Hostile Off-Isolation
Gain Matching to 0.1dB
dB
MHz
Delay from DISABLE to 90% of V
,
,
OUT
Amplifier Enable Time
Amplifier Disable Time
t
120
35
ns
ns
ON
V
IN
= 0.5V
Delay from DISABLE to 10% of V
= 0.5V
OUT
t
OFF
V
IN
Positive transient
Negative transient
30
15
Disable/Enable Switching
Transient
mV
4
_______________________________________________________________________________________
Single/Triple, Low-Glitch, 250MHz, Current-
Feedback Amplifiers with High-Speed Disable
AC ELECTRICAL CHARACTERISTICS—Dual Supplies (MAX4189)
(V
= +5V, V = -5V, V = 0V, DISABLE_ ≥ 3V, A = +1V/V, R = 1600Ω for R = 1kΩ and R = 1100Ω for R = 150Ω; T
=
CC
EE
IN
V
F
L
F
L
A
+25°C, unless otherwise noted.)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
250
210
1.4
0.15
7
MAX
UNITS
R = 1kΩ
L
Small-Signal -3dB Bandwidth
Peaking
BW
MHz
-3dB
R = 150Ω
L
R = 1kΩ
L
dB
R = 150Ω
L
R = 1kΩ
L
Bandwidth for 0.1dB Flatness
Large-Signal -3dB Bandwidth
BW
MHz
MHz
0.1dB
R = 150Ω
L
30
R = 1kΩ
L
60
BW
V
OUT
= 2V
P-P
LS
R = 150Ω
L
55
Positive slew
175
150
28
V/µs
V
= 4V step,
OUT
L
Slew Rate
SR
R = 150Ω
Negative slew
Settling Time to 0.1%
Rise/Fall Time
t
V
= 4V step
= 4V step
ns
ns
S
OUT
OUT
Rise time
Fall time
20
V
22
R = 1kΩ
65
L
f
V
= 5MHz,
C
Spurious-Free Dynamic Range
Second Harmonic Distortion
Third Harmonic Distortion
Differential Phase Error
SFDR
dB
= 2V
OUT
P-P
R = 150Ω
L
51
R = 1kΩ
L
-65
-63
-70
-51
0.02
0.66
0.07
0.18
2
f
C
= 5MHz,
dBc
dBc
V
= 2V
OUT
P-P
R = 150Ω
L
R = 1kΩ
L
f
C
= 5MHz,
V
= 2V
OUT
P-P
R = 150Ω
L
R = 1kΩ
L
DP
NTSC
NTSC
degrees
R = 150Ω
L
R = 1kΩ
L
Differential Gain Error
DG
%
R = 150Ω
L
Input Noise-Voltage Density
Input Noise-Current Density
e
n
f = 10kHz
f = 10kHz
f = 10MHz
nV/√Hz
pA/√Hz
Positive input
Negative input
4
i
n
5
Output Impedance
Crosstalk
Z
4
Ω
dB
OUT
f = 10MHz, input referred
f = 10MHz, input referred
-57
-55
24
All Hostile Off-Isolation
Gain Matching to 0.1dB
dB
MHz
Delay from DISABLE to 90% of V
,
,
OUT
Amplifier Enable Time
Amplifier Disable Time
t
120
40
ns
ns
ON
V
IN
= 0.5V
Delay from DISABLE to 10% of V
= 0.5V
OUT
t
OFF
V
IN
Positive transient
Negative transient
70
Disable/Enable Switching
Transient
mV
110
_______________________________________________________________________________________
5
Single/Triple, Low-Glitch, 250MHz, Current-
Feedback Amplifiers with High-Speed Disable
AC & DYNAMIC PERFORMANCE—Dual Supplies (MAX4190)
(V
= +5V, V
= +25°C, unless otherwise noted.)
= -5V, V = 0V, A = +2V/V; R = R = 1300Ω for R = 1kΩ and R = R = 680Ω for R = 150Ω,
CC
EE
IN
V
G
F
L
F
G
L
T
A
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
185
150
0.1
0.1
85
MAX
UNITS
R = 1kΩ
L
Small-Signal -3dB Bandwidth
Peaking
BW
MHz
SS
R = 150Ω
L
R = 1kΩ
L
dB
R = 150Ω
L
R = 1kΩ
L
Bandwidth for 0.1dB Flatness
Large-Signal -3dB Bandwidth
BW
BW
MHz
MHz
LS
LS
R = 150kΩ
L
75
R = 1kΩ
L
95
V
= 2V
P-P
O
R = 150Ω
L
95
Positive slew
Negative slew
340
270
22
V
= 4V step,
O
L
Slew Rate
SR
V/µs
ns
R = 150Ω
Settling Time to 0.1%
Rise/Fall Time
t
S
V
V
= 2V step
= 4V step,
O
t
R
Rise time
Fall time
10
O
L
ns
R = 150Ω
t
12
F
R = 1kΩ
61
L
f
V
= 5MHz,
C
Spurious-Free Dynamic Range
Second Harmonic Distortion
Third Harmonic Distortion
Differential Gain Error
dB
= 2V
O
P-P
R = 150Ω
L
55
R = 1kΩ
L
-65
-55
-73
-61
0.03
0.07
0.06
0.45
4
f
V
= 5MHz,
C
dBc
= 2V
O
P-P
R = 150Ω
L
R = 1kΩ
L
f
V
= 5MHz,
C
dBc
= 2V
O
P-P
R = 150Ω
L
R = 1kΩ
L
DG
DP
NTSC
NTSC
degrees
degrees
pA/√Hz
R = 150Ω
L
R = 1kΩ
L
Differential Phase Error
R = 150Ω
L
Positive input
Negative input
Input Noise-Current Density
f = 10kHz
5
Input Noise-Voltage Density
Output Impedance
e
n
f = 10kHz
f = 10MHz
2
nV/√Hz
Ω
Z
4
OUT
All Hostile Off-Isolation
f = 10MHz, input referred
-60
120
35
dB
t
ns
Turn-On Time from DISABLE
Turn-Off Time from DISABLE
ON
t
ns
OFF
Positive transient
Negative transient
30
Disable/Enable Switching
Transient
BW
mV
LS
15
6
_______________________________________________________________________________________
Single/Triple, Low-Glitch, 250MHz, Current-
Feedback Amplifiers with High-Speed Disable
AC ELECTRICAL CHARACTERISTICS—Single Supply (MAX4188)
(V
= +5V, V = 0V, V = 2.5V, DISABLE_ ≥ 3V, R to V
/ 2, A = +2V/V, R = R = 1.1kΩ for R = 1kΩ to V
/ 2 and R = R
CC F G
CC
EE
IN
L
CC
V
F
G
L
= 620Ω for R = 150Ω; T = +25°C, unless otherwise noted.)
L
A
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
185
145
0.1
0.1
110
65
MAX
UNITS
R = 1kΩ
L
Small-Signal -3dB Bandwidth
Peaking
BW
MHz
-3dB
R = 150Ω
L
R = 1kΩ
L
dB
R = 150Ω
L
R = 1kΩ
L
Bandwidth for 0.1dB Flatness
Large-Signal -3dB Bandwidth
BW
MHz
MHz
0.1dB
R = 150Ω
L
R = 1kΩ
L
80
BW
V
= 2V
OUT P-P
LS
R = 150Ω
L
80
V
Positive slew
300
230
20
V/µs
V/µs
ns
OUT
L
= 2V step,
Slew Rate
SR
R = 150Ω
Negative slew
Settling Time to 0.1%
Rise/Fall Time
t
S
V
V
= 2V step
= 2V step
OUT
OUT
Rise time
Fall time
8
ns
9
R = 1kΩ
66
L
f
V
= 5MHz,
C
Spurious-Free Dynamic Range
Second Harmonic Distortion
Third Harmonic Distortion
Differential Phase Error
SFDR
dB
= 2V
OUT
P-P
R = 150Ω
L
56
R = 1kΩ
L
-76
-59
-66
-56
0.06
0.34
0.02
0.05
2
f
V
= 5MHz,
C
dBc
dBc
= 2V
OUT
P-P
R = 150Ω
L
R = 1kΩ
L
f
V
= 5MHz,
C
= 2V
OUT
P-P
R = 150Ω
L
R = 1kΩ
L
DP
NTSC
NTSC
degrees
R = 150Ω
L
R = 1kΩ
L
Differential Gain Error
DG
%
R = 150Ω
L
Input Noise-Voltage Density
Input Noise-Current Density
e
n
f = 10kHz
f = 10kHz
f = 10MHz
nV/√Hz
pA/√Hz
Positive input
Negative input
4
i
n
5
Output Impedance
Crosstalk
Z
OUT
4
Ω
dB
f = 10MHz, input referred
f = 10MHz, input referred
-55
-65
40
All Hostile Off Isolation
Gain Matching to 0.1dB
dB
MHz
Delay from DISABLE to 90% of V
,
,
OUT
Amplifier Enable Time
Amplifier Disable Time
t
120
35
ns
ns
ON
V
= 3V
IN
Delay from DISABLE to 10% of V
= 3V
OUT
t
OFF
V
IN
Positive transient
Negative transient
30
15
Disable/Enable Switching
Transient
mV
_______________________________________________________________________________________
7
Single/Triple, Low-Glitch, 250MHz, Current-
Feedback Amplifiers with High-Speed Disable
AC ELECTRICAL CHARACTERISTICS—Single Supply (MAX4189)
(V
= +5V, V = 0V, V = 2.5V, DISABLE_ ≥ 3V, R to V
/ 2, A = +1V/V, R = 1500Ω for R = 1kΩ and R = 1600Ω for
CC
EE
IN
L
CC
V
F
L
F
R = 150Ω; T = +25°C, unless otherwise noted.)
L
A
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
230
190
1.4
0.15
7
MAX
UNITS
R = 1kΩ
L
Small-Signal -3dB Bandwidth
Peaking
BW
MHz
-3dB
R = 150Ω
L
R = 1kΩ
L
dB
R = 150Ω
L
R = 1kΩ
L
Bandwidth for 0.1dB Flatness
Large-Signal -3dB Bandwidth
BW
MHz
MHz
0.1dB
R = 150Ω
L
40
R = 1kΩ
L
50
BW
V
OUT
= 2V
P-P
LS
R = 150Ω
L
45
Positive slew
Negative slew
160
135
25
V
= 2V step,
OUT
L
Slew Rate
SR
V/µs
ns
R = 150Ω
Settling Time to 0.1%
Rise/Fall Time
t
V
= 2V step
= 2V step
S
OUT
OUT
Rise time
Fall time
12
V
ns
15
R = 1kΩ
57
L
f
V
= 5MHz,
C
Spurious-Free Dynamic Range
Second Harmonic Distortion
Third Harmonic Distortion
Differential Phase Error
SFDR
dB
dBc
= 2V
OUT
P-P
R = 150Ω
L
47
R = 1kΩ
L
-58
-54
-57
-47
0.04
0.66
0.06
0.17
2
f
C
= 5MHz,
V
= 2V
OUT
P-P
R = 150Ω
L
R = 1kΩ
L
f
C
= 5MHz,
dBc
V
= 2V
OUT
P-P
R = 150Ω
L
R = 1kΩ
L
DP
NTSC
NTSC
degrees
R = 150Ω
L
R = 1kΩ
L
Differential Gain Error
DG
%
R = 150Ω
L
Input Noise-Voltage Density
Input Noise-Current Density
e
n
f = 10kHz
f = 10kHz
f = 10MHz
nV/√Hz
pA/√Hz
Positive input
4
i
n
Negative input
5
Output Impedance
Crosstalk
Z
4
Ω
dB
OUT
f = 10MHz, input referred
f = 10MHz, input referred
-57
-55
25
All Hostile Off-Isolation
Gain Matching to 0.1dB
dB
MHz
Delay from DISABLE to 90% of V
,
,
OUT
Amplifier Enable Time
Amplifier Disable Time
t
120
40
ns
ns
ON
V
IN
= 3V
Delay from DISABLE to 10% of V
= 3V
OUT
t
OFF
V
IN
Positive transient
Negative transient
70
Disable/Enable Switching
Transient
mV
110
Note 1: Input Offset Voltage does not include the effect of I
flowing through R /R .
F G
BIAS
Note 2: Does not include current through external feedback network.
Note 3: Over operating supply-voltage range.
8
_______________________________________________________________________________________
Single/Triple, Low-Glitch, 250MHz, Current-
Feedback Amplifiers with High-Speed Disable
AC & DYNAMIC PERFORMANCE—Single Supply (MAX4190)
(V
= +5V, V
= +25°C, unless otherwise noted)
= 0V, V = 0V, A = +2V/V; R = R = 1500Ω for R = 1kΩ and R = R = 750Ω for R = 150Ω,
CC
EE
IN
V
G
F
L
F
G
L
T
A
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
165
135
0.1
0.1
70
MAX
UNITS
R = 1kΩ
L
Small-Signal -3dB Bandwidth
Peaking
BW
MHz
-3dB
R = 150Ω
L
R = 1kΩ
L
dB
R = 150Ω
L
R = 1kΩ
L
Bandwidth for 0.1dB Flatness
Large-Signal -3dB Bandwidth
BW
MHz
MHz
0.1dB
R = 150Ω
L
65
R = 1kΩ
L
75
BW
V
O
= 2V
P-P
LS
R = 150Ω
L
75
Positive slew
Negative slew
290
220
20
V
= 2V step,
O
L
Slew Rate
SR
V/µs
ns
R = 150Ω
Settling Time to 0.1%
Rise/Fall Time
t
V
V
= 2V step
S
O
Rise time
Fall time
8
t
= 2V step,
R
O
ns
t
F
R = 150Ω
L
9
R = 1kΩ
59
L
f
V
= 5MHz,
C
Spurious-Free Dynamic Range
Second Harmonic Distortion
Third Harmonic Distortion
Differential Gain Error
dB
dBc
dBc
%
= 2V
P-P
O
R = 150Ω
L
55
R = 1kΩ
L
-59
-55
-68
-60
0.02
0.08
0.07
0.43
2
f
C
= 5MHz,
V
= 2V
P-P
O
R = 150Ω
L
R = 1kΩ
L
f
C
= 5MHz,
V
= 2V
P-P
O
R = 150Ω
L
R = 1kΩ
L
DG
DP
NTSC
NTSC
R = 150Ω
L
R = 1kΩ
L
Differential Phase Error
degrees
nV/√Hz
pA/√Hz
R = 150Ω
L
Input Noise-Voltage Density
Input Noise-Current Density
f = 10kHz
f = 10kHz
f = 10MHz
Positive input
Negative input
4
i
n
5
Output Impedance
Z
4
Ω
dB
ns
ns
OUT
All Hostile Off-Isolation
Turn-On Time from DISABLE
Turn-Off Time from DISABLE
f = 10MHz, input referred, R = 150Ω
-60
120
35
L
t
ON
t
OFF
Positive transient
Negative transient
30
Disable/Enable Switching
Transient
BW
mV
LS
15
_______________________________________________________________________________________
9
Single/Triple, Low-Glitch, 250MHz, Current-
Feedback Amplifiers with High-Speed Disable
__________________________________________Typical Operating Characteristics
(V
= +5V, V = -5V, T = +25°C, unless otherwise noted.)
EE
A
CC
MAX4188 SMALL-SIGNAL GAIN
vs. FREQUENCY (DUAL SUPPLIES)
MAX4188 SMALL-SIGNAL GAIN
vs. FREQUENCY (SINGLE SUPPLY)
MAX4188 GAIN FLATNESS
vs. FREQUENCY (DUAL SUPPLIES)
10
9
10
9
0.4
0.3
0.2
R = R = 910Ω
F
L
G
R = 1kΩ
R = R = 910kΩ
R = 1kΩ
L
R = R = 430Ω
F
G
F
G
8
8
R = R = 560Ω
F
G
R = 100Ω
L
R = R = 1.1kΩ
R = 150Ω
F
G
L
7
6
7
6
0.1
0
R = 1kΩ
L
R = R = 620Ω
L
F
G
5
4
5
4
-0.1
-0.2
R = R = 620Ω
R = 150Ω
L
F
G
R = 150Ω
R = R = 390Ω
R = 100Ω
L
F
G
R = R = 390Ω
F
G
3
2
3
2
-0.3
-0.4
R = 100Ω
L
V
V
= 0V
EE
IN
V
V
A
= 20mV
= +2V/V
= 20mV
P-P
10
IN
V
P-P
V
A
= 20mV
= +2V/V
P-P
IN
V
1
0
1
0
-0.5
-0.6
A = +2V/V
1
10
100
1000
1000
1000
1
10
100
1000
1
100
1000
FREQUENCY (MHz)
FREQUENCY (MHz)
FREQUENCY (MHz)
MAX4189 SMALL-SIGNAL GAIN
vs. FREQUENCY (SINGLE SUPPLY)
MAX4189 GAIN FLATNESS
vs. FREQUENCY (DUAL SUPPLIES)
MAX4189 SMALL-SIGNAL GAIN
vs. FREQUENCY (DUAL SUPPLIES)
0.2
0.1
0
4
3
2
4
3
2
R = 1.1kΩ
R = 150Ω
L
F
R = 1.5kΩ
R = 1.6kΩ
F
F
R = 1kΩ
L
R = 1kΩ
L
R = 680Ω
F
L
R = 100Ω
R = 680Ω
F
1
0
-0.1
-0.2
-0.3
-0.4
1
0
R = 100Ω
L
-1
-2
-1
-2
R = 1.6kΩ
F
R = 150Ω
L
R = 1.1kΩ
-3
-4
-5
-6
-0.5
-0.6
-3
-4
F
R = 910Ω
F
R = 150Ω
L
V
V
A
= 0
= 20mV
= +1V/V
R = 100Ω
L
EE
IN
V
V
A
= 20mV
= +1V/V
P-P
IN
V
P-P
V
A
= 20mV
= +1V/V
P-P
IN
V
-0.7
-0.8
-5
-6
1
10
100
1000
1
10
100
1000
1
10
100
FREQUENCY (MHz)
FREQUENCY (MHz)
FREQUENCY (MHz)
MAX4188 LARGE-SIGNAL GAIN
vs. FREQUENCY (DUAL SUPPLIES)
MAX4188 LARGE-SIGNAL GAIN
vs. FREQUENCY (SINGLE SUPPLY)
MAX4188 SMALL-SIGNAL GAIN
MATCHING vs. FREQUENCY
10
2.5
10
9
9
8
2.0
1.5
8
CH1-CH3
R = R = 620Ω
F
G
R = R = 560Ω
F
G
7
6
7
6
1.0
0.5
R = 150Ω
L
R = 150Ω
L
5
4
5
4
0
R = R = 1.1kΩ
F
L
G
R = R = 910Ω
R = 1kΩ
-0.5
F
L
G
CH2-CH3
R = 1kΩ
3
2
3
2
-1.0
-1.5
V
= 20mV
P-P
IN
R = R = 750Ω
V
V
A
= 0
= 1V
F
G
EE
IN
CH1-CH2
100
R = 1kΩ
V
A
= 1V
P-P
= +2V/V
L
P-P
= +2V/V
IN
V
1
0
1
0
-2.0
-2.5
A
= +2V/V
V
V
1
10
100
1
10
100
1000
1
10
1000
FREQUENCY (MHz)
FREQUENCY (MHz)
FREQUENCY (MHz)
10 ______________________________________________________________________________________
Single/Triple, Low-Glitch, 250MHz, Current-
Feedback Amplifiers with High-Speed Disable
____________________________________Typical Operating Characteristics (continued)
(V
= +5V, V = -5V, T = +25°C, unless otherwise noted.)
EE
A
CC
MAX4189 LARGE-SIGNAL GAIN
vs. FREQUENCY (SINGLE SUPPLY)
MAX4189 LARGE-SIGNAL GAIN
vs. FREQUENCY (DUAL SUPPLIES)
MAX4189 SMALL-SIGNAL GAIN
MATCHING vs. FREQUENCY
4
2.5
4
3
2
3
2
2.0
1.5
R = 1.5kΩ
R = 1kΩ
L
F
CH_1–CH_3
CH_1–CH_2
R = 1.6kΩ
R = 1kΩ
L
F
1
0
1
0
1.0
0.5
-1
-2
-1
-2
0
R = 1.6kΩ
R = 150Ω
L
R = 1.1kΩ
R = 150Ω
L
F
F
-0.5
-3
-4
CH_3–CH_2
-3
-4
-1.0
-1.5
V
= 2V
P-P
IN
F
L
V
V
V
A
= 0
= 2V
= +1V/V
R = 1.6kΩ
R = 1kΩ
A
EE
IN
V
V
A
= 2V
= 1V/V
P-P
IN
V
P-P
-5
-6
-5
-6
-2.0
-2.5
= +1V/V
1
10
100
1000
1
10
100
1000
1
10
100
1000
FREQUENCY (MHz)
FREQUENCY (MHz)
FREQUENCY (MHz)
MAX4188 CROSSTALK vs.
FREQUENCY (DUAL SUPPLIES)
MAX4188 HARMONIC DISTORTION
vs. FREQUENCY (DUAL SUPPLIES)
MAX4188 HARMONIC DISTORTION
vs. FREQUENCY (SINGLE SUPPLY)
0
0
0
-10
-20
-30
-40
-50
-60
-70
-80
-90
-100
V
= 2V
P-P
V
= 2V
OUT
P-P
OUT
V
= 2V
P-P
OUT
-10
-20
R = 150Ω
L
-10
-20
-30
-40
-50
-60
-70
-80
-30
-40
3RD (R = 150Ω)
L
3RD (R = 150Ω)
L
-50
-60
2ND (R = 150Ω)
2ND (R = 150Ω)
L
L
-70
-80
2ND (R = 1kΩ)
L
3RD (R = 1kΩ)
L
-90
2ND (R = 1kΩ)
L
3RD (R = 1kΩ)
L
-100
1
10
100
1000
0.1
1
10
100
0.1
1
10
100
FREQUENCY (MHz)
FREQUENCY (MHz)
FREQUENCY (MHz)
MAX4189 CROSSTALK vs.
FREQUENCY (DUAL SUPPLIES)
MAX4189 HARMONIC DISTORTION
vs. FREQUENCY (DUAL SUPPLIES)
MAX4189 HARMONIC DISTORTION
vs. FREQUENCY (SINGLE SUPPLY)
0
0
0
V = 2V
P-P
OUT
R = 150Ω
V
= 2V
V
= 2V
P-P
OUT
P-P
OUT
-10
-20
-10
-20
L
-10
-20
-30
-40
-50
-60
-70
-80
-30
-40
-30
-40
3RD (R = 150Ω)
L
3RD (R = 150Ω)
L
-50
-60
-50
-60
2ND (R = 150Ω)
L
2ND (R = 150Ω)
L
2ND (R = 1kΩ)
L
-70
-80
-70
-80
2ND (R = 1kΩ)
L
3RD (R = 1kΩ)
L
-90
-90
3RD (R = 1kΩ)
L
-100
-100
1
10
100
1000
0.1
1
10
100
0.1
1
10
100
FREQUENCY (MHz)
FREQUENCY (MHz)
FREQUENCY (MHz)
______________________________________________________________________________________ 11
Single/Triple, Low-Glitch, 250MHz, Current-
Feedback Amplifiers with High-Speed Disable
____________________________________Typical Operating Characteristics (continued)
(V
CC
= +5V, V = -5V, T = +25°C, unless otherwise noted.)
EE
A
-3dB BANDWIDTH
vs. INPUT AMPLITUDE
INPUT VOLTAGE-NOISE
DENSITY vs. FREQUENCY
TOTAL VOLTAGE-NOISE DENSITY
vs. FREQUENCY (INPUT REFERRED)
3.4
3.2
3.0
2.8
2.6
2.4
2.2
2.0
1.8
1.6
1.4
350
28
24
20
16
12
8
MAX4189
MAX4188
V
IN
300
250
200
150
V
OUT
MAX4188
910kΩ
910kΩ
DUAL SUPPLIES:
R = 1kΩ,
L
100
50
A
V
= +2V/V, R = R = 910Ω
F G
FOR MAX4188;
= +1V/V, R = 1.6kΩ
A
V
F
FOR MAX4189
0
4
100 1k
10k 100k 1M 10M 100M 1G
FREQUENCY (Hz)
0.02
-40
-40
0.1
INPUT AMPLITUDE (Vp-p)
1
2
100 1k
10k 100k 1M 10M 100M 1G
FREQUENCY (Hz)
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY
OUTPUT IMPEDANCE
vs. FREQUENCY (DUAL SUPPLIES)
SUPPLY CURRENT PER AMPLIFIER
vs. TEMPERATURE
0
-10
-20
-30
-40
-50
-60
-70
-80
-90
-100
1k
1.6
1.5
R = 1kΩ,ꢀ
= +2V/V, R = R = 910Ω
FOR MAX4188;
= +1 V/V, R = 1.6kΩ
FOR MAX4189
L
A
V
F G
V
(MAX4188)
V
= 5V; V = -5V
EE
CC
CC
100
10
1
A
V
F
V
(MAX4189)
CC
V
= 5V; V = 0
EE
CC
1.4
1.3
1.2
V
(MAX4189)
EE
MAX4189
MAX4188
V
(MAX4188)
EE
0.1
0.1
1
10
100
1000
0.1
1
10
100
1000
-20
0
20
40
60
80
FREQUENCY (MHz)
FREQUENCY (MHz)
TEMPERATURE (°C)
INPUT BIAS CURRENT
vs. TEMPERATURE
INPUT OFFSET VOLTAGE (V
vs. TEMPERATURE
)
DISABLED SUPPLY CURRENT PER
AMPLIFIER vs. TEMPERATURE
OS
5
4
3
2
1
0
0.5
0.4
0.3
0.2
2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
V
= 5V
CC
V
= 2.5V
CC
I
- (POSITIVE INPUT)
B
I
- (NEGATIVE INPUT)
B
-40
-20
0
20
40
60
80
-40
-20
0
20
40
60
80
-20
0
20
40
60
80
TEMPERATURE (°C)
TEMPERATURE (°C)
TEMPERATURE (°C)
12 ______________________________________________________________________________________
Single/Triple, Low-Glitch, 250MHz, Current-
Feedback Amplifiers with High-Speed Disable
____________________________________Typical Operating Characteristics (continued)
(V
= +5V, V = -5V, T = +25°C, unless otherwise noted.)
EE
A
CC
MAX4188
ENABLE/DISABLE RESPONSE
MAX4189
POWER-ON RESPONSE
OUTPUT VOLTAGE SWING
vs. TEMPERATURE
1.8
1.6
1.4
1.2
1.0
0.8
4V
DISABLE
0V
10V
V
- V ; R = 150Ω
EE L
OL
V
CC
0V
V
- V ; R = 150Ω
OH L
CC
2V
V
OUT
OUT
0V
2V/div
0V
V
- V ; R = 1kΩ
EE
OL
L
V
- V ; R = 1kΩ
OH L
CC
50ns/div
200ns/div
-40
-20
0
20
40
60
80
A
= +2V/V, R = R = 910Ω, R = 1kΩ, V = 1V
V
F
G
L
IN
A
= +1V/V, R = 1kΩ, R = 1.6kΩ, V = 0
V
L
F
EE
TEMPERATURE (°C)
MAX4188
MAX4188
SMALL-SIGNAL PULSE RESPONSE
SMALL-SIGNAL PULSE RESPONSE
(WITH C
MAX4188
LARGE-SIGNAL PULSE RESPONSE
)
LOAD
+25mV
IN
+1V
IN
+25mV
IN
-25mV
-1V
-25mV
+50mV
+50mV
OUT
+2V
OUT
-2V
OUT
-50mV
-50mV
10ns/div
10ns/div
= +2V/V, R = R = 910Ω, R = 1kΩ, C = 47pF
10ns/div
A
= +2V/V, R = R = 910Ω, R = 1kΩ
A
A
= +2V/V, R = R = 910Ω, R = 1kΩ
V
F
G
L
V
F
G
L
L
V
F
G
L
______________________________________________________________________________________ 13
Single/Triple, Low-Glitch, 250MHz, Current-
Feedback Amplifiers with High-Speed Disable
____________________________________Typical Operating Characteristics (continued)
(V
= +5V, V = -5V, T = +25°C, unless otherwise noted.)
CC
EE
A
MAX4189
SMALL-SIGNAL PULSE RESPONSE
MAX4189
MAX4189
LARGE-SIGNAL PULSE RESPONSE
SMALL-SIGNAL PULSE RESPONSE
(WITH C
)
LOAD
+50mV
IN
+50mV
IN
+2V
IN
-50mV
-50mV
-2V
+50mV
OUT
+50mV
OUT
+2V
OUT
-2V
-50mV
-50mV
10ns/div
10ns/div
10ns/div
A
= +1V/V, R = 1.1kΩ, R = 150Ω
A
= +1V/V, R = 1.6kΩ, R = 1kΩ, C = 47pF
A
= +1V/V, R = 1.1kΩ, R = 150Ω
V
F
L
V
F
L
L
V
F
L
MAX4188
MAX4189
OFF-CHANNEL FEEDTHROUGH
SWITCHING TRANSIENT
SWITCHING TRANSIENT
vs. FREQUENCY (DUAL SUPPLIES)
-25
-35
-45
-55
-65
-75
-85
-95
R = 150Ω
L
3V
3V
DISABLE
DISABLE
0V
0V
OUT
0V
OUT
100mV/div
20mV/div
100ns/div
100ns/div
1
10
100
1000
A
= +1V/V, R = 1.6kΩ, R = 1kΩ, V = 0
A
= +2V/V, R = 910Ω, R = 1kΩ, V = 0
V
F
L
IN
V
F
L
IN
FREQUENCY (MHz)
14 ______________________________________________________________________________________
Single/Triple, Low-Glitch, 250MHz, Current-
Feedback Amplifiers with High-Speed Disable
Pin Descriptions
PIN
MAX4188/MAX4189
MAX4190
SO/µMAX
—
NAME
FUNCTION
SO
QSOP
Disable Control Input for Amplifier 1. Amplifier 1 is enabled when
1
1
DISABLE1
DISABLE2
DISABLE3
DISABLE1 ≥ (V
- 2V) and disabled when DISABLE1 ≤ (V
- 3V).
CC
CC
Disable Control Input for Amplifier 2. Amplifier 2 is enabled when
DISABLE2 ≥ (V - 2V) and disabled when DISABLE2 ≤ (V - 3V).
2
3
2
3
—
—
CC
CC
Disable Control Input for Amplifier 3. Amplifier 3 is enabled when
DISABLE3 ≥ (V - 2V) and disabled when DISABLE3 ≤ (V - 3V).
CC
CC
4
5
4
5
7
—
—
—
1, 5
—
—
—
V
Positive Power Supply. Connect V
Amplifier 1 Noninverting Input
Amplifier 1 Inverting Input
Amplifier 1 Output
to +5V.
CC
CC
IN1+
IN1-
6
6
7
7
OUT1
N.C.
—
8
8, 9
10
11
12
No Connection. Not internally connected.
Amplifier 3 Output
OUT3
IN3-
9
Amplifier 3 Inverting Input
10
IN3+
Amplifier 3 Noninverting Input
Negative Power Supply. Connect V to -5V or to ground for single-supply
EE
operation.
11
13
4
V
EE
12
13
14
—
—
—
14
15
16
—
—
—
—
—
—
2
IN2+
IN2-
OUT2
IN-
Amplifier 2 Noninverting Input
Amplifier 2 Inverting Input
Amplifier 2 Output
Amplifier Inverting Input
Amplifier Noninverting Input
Amplifier Output
3
IN+
6
OUT
Disable Control Input. Amplifier is enabled when DISABLE ≥ (V
- 2V)
CC
—
—
8
DISABLE
and disabled when DISABLE ≤ (V
- 3V).
CC
Wide bandwidth, low power, low differential phase/gain
error, and excellent gain flatness make the MAX4188
family ideal for use in portable video equipment such
as video cameras, video switchers, and other battery-
powered equipment. Their two-stage design provides
higher gain and lower distortion than conventional sin-
gle-stage, current-feedback amplifiers. This feature,
combined with a fast settling time, makes these devices
suitable for buffering high-speed analog-to-digital con-
verters.
Detailed Description
The MAX4188/MAX4189/MAX4190 are very low-power,
current-feedback amplifiers featuring bandwidths up to
250MHz, 0.1dB gain flatness to 80MHz, and low differ-
ential gain (0.03%) and phase (0.05°) errors. These
amplifiers achieve very high bandwidth-to-power ratios
while maintaining low distortion, wide signal swing, and
excellent load-driving capabilities. They are optimized
for 5V supplies but are also fully specified for single
+5V operation. Consuming only 1.5mA per amplifier,
these devices have 55mA output current drive capabil-
ity and achieve low distortion even while driving 150Ω
loads.
The MAX4188/MAX4189/MAX4190 have a high-speed,
low-power disable mode that is activated by driving the
amplifiers’ DISABLE input low. In the disable mode, the
______________________________________________________________________________________ 15
Single/Triple, Low-Glitch, 250MHz, Current-
Feedback Amplifiers with High-Speed Disable
amplifiers achieve very high isolation from input to output
+5V
-5V
(65dB at 10MHz), and the outputs are placed into a high-
impedance state. These amplifiers achieve low switch-
ing-transient glitches (<45mV
) when switching
P-P
1.0µF
0.1µF
0.1µF
11
1.0µF
between enable and disable modes. Fast enable/disable
times (120ns/35ns), along with high off-isolation and low
switching transients, allow these devices to be used as
high-performance, high-speed multiplexers. This is
achieved by connecting the outputs of multiple amplifiers
together and controlling the DISABLE inputs to enable
one amplifier and disable all others. The disabled ampli-
fiers present a very light load (1µA leakage current and
3.5pF capacitance) to the active amplifier’s output. The
feedback network impedance of all the disabled ampli-
fiers must still be considered when calculating the total
load on the active amplifier output. Figure 1 shows an
application circuit using the MAX4188 as a 3:1 video mul-
tiplexer.
4
560Ω
560Ω
6
5
7
AMP1
87Ω
V
1
IN
75Ω
MAX4188
560Ω
75Ωꢀ
CABLE
560Ω
87Ω
13
12
V
OUT
14
AMP2
V
2
IN
75Ω
The DISABLE_ logic threshold is typically V
- 2.5V,
CC
75Ω
independent of V . For a single +5V supply or dual
EE
5V supplies, the disable inputs are CMOS-logic com-
patible. The amplifiers default to the enabled mode if
the DISABLE pin is left unconnected. If the DISABLE
pin is left floating, take proper care to ensure that no
high-frequency signals are coupled to this pin, as this
may cause false triggering.
560Ω
560Ω
87Ω
9
8
AMP3
10
V
3
IN
75Ω
Applications Information
1
2
3
Theory of Operation
The MAX4188/MAX4189/MAX4190 are current-feedback
amplifiers, and their open-loop transfer function is
DISABLE1
DISABLE2
DISABLE3
expressed as a transimpedance, ∆V
/∆I , or TZ. The
OUT IN
frequency behavior of the open-loop transimpedance is
similar to the open-loop gain of a voltage-mode feedback
amplifier. That is, it has a large DC value and decreases
at approximately 6dB per octave.
Figure 1. High-Speed 3:1 Video Multiplexer
Analyzing the follower with gain, as shown in Figure 2,
yields the following transfer function:
R
G
R
F
V
/ V = G x [(T (S) / T (s) + G x (R + R )]
IN Z Z IN F
OUT
where G = A
300Ω.
= 1 + (R / R ), and R = 1/g
≅
M
VCL
F
G
IN
R
IN
At low gains, G x R < R . Therefore, the closed-loop
+1
V
IN
F
OUT
bandwidth is essentially independent of closed-loop
gain. Similarly TZ > R at low frequencies, so that:
T
Z
F
+1
MAX4188
MAX4189
MAX4190
V
V
OUT
= G = 1 + (R / R )
F
G
V
IN
IN
Figure 2. Current-Feedback Amplifier
16 ______________________________________________________________________________________
Single/Triple, Low-Glitch, 250MHz, Current-
Feedback Amplifiers with High-Speed Disable
Adequate bypass capacitance at each supply is very
important to optimize the high-frequency performance of
these amplifiers. Inadequate bypassing will also
degrade crosstalk rejection, especially with heavier
loads. Use a 1µF capacitor in parallel with a 0.01µF to
0.1µF capacitor between each supply pin and ground to
achieve optimum performance. The bypass capacitors
should be located as close to the device as possible. A
10µF low-ESR tantalum capacitor may be required to
produce the best settling time and lowest distortion
when large transient currents must be delivered to a
load.
Layout and Power-Supply Bypassing
As with all wideband amplifiers, a carefully laid out PCB
and adequate power-supply bypassing are essential to
realizing the optimum AC performance of MAX4188/
MAX4189/MAX4190. The PC board should have at
least two layers. Signal and power should be on one
layer. A large low-impedance ground plane, as free of
voids as possible, should be the other layer. With multi-
layer boards, locate the ground plane on a layer that
incorporates no signal or power traces.
Do not use wire-wrap boards or breadboards and
sockets. Wire-wrap boards are too inductive.
Breadboards and sockets are too capacitive. Surface-
mount components have lower parasitic inductance
and capacitance, and are therefore preferable to
through-hole components. Keep lines as short as pos-
sible to minimize parasitic inductance, and avoid 90°
turns. Round all corners. Terminate all unused amplifier
inputs to ground with a 100Ω or 150Ω resistor.
Choosing Feedback and Gain Resistors
The optimum value of the external-feedback (R ) and
F
gain-setting (R ) resistors used with the MAX4188/
G
MAX4189/MAX4190 depends on the closed-loop gain
and the application circuit’s load. Table 1 lists the opti-
mum resistor values for some specific gain configura-
tions. One-percent resistor values are preferred to
maintain consistency over a wide range of production
lots. Figures 3a and 3b show the standard inverting
and noninverting configurations. Note that the nonin-
verting circuit gain (Figure 3b) is 1 plus the magnitude
of the inverting closed-loop gain. Otherwise, the two
circuits are identical.
The MAX4188/MAX4189/MAX4190 achieve a high
degree of off-isolation (65dB at 10MHz) and low
crosstalk (-55dB at 10MHz). The input and output sig-
nal traces must be kept from overlapping to achieve
high off-isolation. Coupling between the signal traces of
different channels will degrade crosstalk. The signal
traces of each channel should be kept from overlap-
ping with the signal traces of the other channels.
V
IN
R
F
R
G
R
F
R
G
R
S
R
T
V
OUT
V
OUT
R
O
R
S
R
O
V
IN
MAX4188
MAX4189
MAX4190
R
T
MAX4188
MAX4189
MAX4190
V
OUT
= [1+ (R / R )] V
F G
IN
V
OUT
= -(R / R ) (V )
F G IN
Figure 3a. Inverting Gain Configuration
Figure 3b. Noninverting Gain Configuration
______________________________________________________________________________________ 17
Single/Triple, Low-Glitch, 250MHz, Current-
Feedback Amplifiers with High-Speed Disable
Table 1a. MAX4188 Recommended Component Values
DUAL SUPPLIES
SINGLE SUPPLY
A = +5
(V/V)
A = +10
V
(V/V)
A
= +5
V/V
A = +10
V
V
V
A
= +2V/V
A = +2V/V
V
COMPONENT/
BW
V
V/V
R =
L
1kΩ
R =
L
150Ω
R =
L
100Ω
R =
L
1kΩ
R =
L
1kΩ
R =
L
1kΩ
R =
L
150Ω
R =
L
100Ω
R =
L
1kΩ
R =
L
1kΩ
R (Ω)
910
910
200
560
560
160
390
390
145
470
120
70
470
51
1.1k
1.1k
185
620
620
145
430
430
130
470
120
70
470
51
F
R
(Ω)
G
-3dB BW (MHz)
30
30
Table 1b. MAX4189 Recommended Component Values
DUAL SUPPLIES
COMPONENT/
SINGLE SUPPLY
= +1V/V
A
V
= +1V/V
A
V
BW
R = 1kΩ
R = 150Ω
R = 100Ω
L
R = 1kΩ
L
R = 150Ω
L
R = 100Ω
L
L
L
R
(Ω)
1.6k
250
1.1k
210
680
185
1.5k
230
1.6k
190
910
165
G
-3dB BW (MHz)
Table 1c. MAX4190 Recommended Component Values
DUAL SUPPLIES
SINGLE SUPPLY
A = +5
V
(V/V)
A = +10
V
(V/V)
A
= +5
V/V
A = +10
V
V
A
V
= +2V/V
A = +1V/V
V
COMPONENT/
BW
V/V
R =
L
1kΩ
R =
L
150Ω
R =
L
100Ω
R =
L
1kΩ
R =
L
1kΩ
R =
L
1kΩ
R =
L
150Ω
R =
L
100Ω
R =
L
1kΩ
R =
L
1kΩ
R (Ω)
1.3k
1.3k
185
680
680
180
510
510
135
470
120
70
470
51
1.5k
1.5k
165
750
750
135
510
510
125
470
120
70
470
51
F
R
(Ω)
G
-3dB BW (MHz)
30
30
The equation for the total DC error at the output is:
DC and Noise Errors
Several major error sources must be considered in any
op amp. These apply equally to the MAX4188/
MAX4189/MAX4190. Offset-error terms are given by the
equation below. Voltage and current-noise errors are
root-square summed and are therefore computed sep-
arately. In Figure 4, the total output offset voltage is
determined by the following factors:
⎛
⎞
R
R
F
V
=
I
(
R + I
R || R
+ V
1+
)
(
)
(
)
OUT
B+
S
B−
F
G
OS
⎜
⎟
[
]
⎝
⎠
G
R
F
R
G
• The input offset voltage (V ) times the closed-loop
OS
gain (1 = R / R ).
F
G
I -
B
V
OUT
• The positive input bias current (I ) times the
B+
I +
B
source resistor (R ) (usually 50Ω or 75Ω), plus the
S
negative input bias current (I ) times the parallel
MAX4188
MAX4189
MAX4190
R
B-
S
combination of R and R . In current-feedback
G
F
amplifiers, the input bias currents at the IN+ and IN-
terminals do not track each other and may have
opposite polarity, so there is no benefit to matching
the resistance at both inputs.
Figure 4. Output Offset Voltage
18 ______________________________________________________________________________________
Single/Triple, Low-Glitch, 250MHz, Current-
Feedback Amplifiers with High-Speed Disable
The total output-referred noise voltage is:
With a 200MHz system bandwidth, this calculates to
68µV (approximately 408µV , choosing the six-
RMS
sigma value).
P-P
⎛
⎞
R
R
F
e
=
1+
x
n(OUT)
⎜
⎟
⎝
⎠
G
Video Line Driver
2
]
2
]
2
The MAX4188/MAX4189/MAX4190 are well suited to
drive coaxial transmission lines when the cable is termi-
nated at both ends (Figure 5). Cable frequency
response can cause variations in the signal’s flatness.
i
(
R
)
+
i
(
R || R
+ e
n
)
(
)
[
n+
S
[
n−
F
G
The MAX4188/MAX4189/MAX4190 have a very low,
2nV/√Hz noise voltage. The current noise at the positive
See Table 1 for optimum R and R values.
F
G
input (i ) is 4pA/√Hz, and the current noise at the
n+
Driving Capacitive Loads
The MAX4188/MAX4189/MAX4190 are optimized for
AC performance. Reactive loads decrease phase mar-
gin and may produce excessive ringing and oscillation.
Unlike most high-speed amplifiers, the MAX4188/
MAX4189/MAX4190 are tolerant of capacitive loads up
to 50pF. Capacitive loads greater than 50pF may
cause ringing and oscillation. Figure 6a shows a circuit
that eliminates this problem. Placing the small (usually
inverting input is 5pA/√Hz.
An example of the DC error calculations, using the
MAX4188 typical data and typical operating circuit
where R = R = 560kΩ (R || R =280Ω), and
F
G
F
G
R = 37.5Ω, gives the following:
S
⎡
⎢
⎢
⎤
⎥
⎥
−6
−6
⎞
⎠
⎛
⎞
⎠
⎛
⎝
1 x 10
x 37.5 + 2 x 10
280
⎝
V
=
x 1+1
(
)
OUT
−3
15Ω to 33Ω) isolation resistor, R , before the reactive
⎢
⎥
S
+ 1.5 x 10
⎣
⎦
load prevents ringing and oscillation. At higher capaci-
tive loads, the interaction of the load capacitance and
isolation resistor controls AC performance. Figures 6b
and 6c show the MAX4188 and MAX4189 frequency
response with a 100pF capacitive load. Note that in
each case, gain peaking is substantially reduced when
the 20Ω resistor is used to isolate the capacitive load
from the amplifier output.
V
= 4.1mV
OUT
Calculating the total output noise in a similar manner
yields:
2
−12
⎛
⎝
⎞
4 x 10
5 x 10
x 37.5
+
⎠
e
e
= 1+1
(
)
n(OUT)
n(OUT)
2
2
−12
−9
⎞
⎛
⎝
⎞
⎛
⎝
x 280
+
2 x 10
⎠
⎠
= 4.8nV/ Hz
R
G
R
F
560Ω
560Ω
+5V
MAX4188
MAX4189
MAX4190
0.1µF
R
G
R
F
75Ω CABLE
75Ω
R
S
MAX4188
75Ω CABLE
VIDEO
OUT
75Ω
V
IN
C
L
R
L
VIDEO
IN
75Ω
0.1µF
-5V
Figure 5. Video Line Driver Application
Figure 6a. Using an Isolation Resistor (R ) for High Capacitive
S
Loads
______________________________________________________________________________________ 19
Single/Triple, Low-Glitch, 250MHz, Current-
Feedback Amplifiers with High-Speed Disable
12
10
5
4
MAX4188/MAX4190
MAX4189
A = +2V/V
A = +1V/V
V
V
R = R = 910Ω
R = 1.6k
F
F
G
R = 0Ω
S
8
6
4
2
0
3
2
R = 1k || 100pF
R = 1k || 100pF
L
L
R = 0Ω
S
V
IN
= 20mV
V
IN
= 20mV
P-P
P-P
1
R = 20Ω
S
0
R = 20Ω
S
R = 33Ω
S
-1
-2
-4
-2
-3
-4
-5
R = 33Ω
S
-8
-10
1
10
100
1000
1
10
100
1000
FREQUENCY (MHz)
FREQUENCY (MHz)
Figure 6c. Normalized Frequency Response with 100pF
Capacitive Load
Figure 6b. Normalized Frequency Response with 100pF
Capacitive Load
Chip Information
Ordering Information (continued)
PIN-
PACKAGE
PKG
CODE
MAX4188/4189
TRANSISTOR COUNT: 336
PART
TEMP RANGE
MAX4189ESD+
MAX4189EEE+
MAX4190ESA+
MAX4190EUA+T
-40°C to +85°C 14 SO
-40°C to +85°C 16 QSOP
-40°C to +85°C 8 SO
S14-1
E16-1
S8-2
MAX4190
TRANSISTOR COUNT: 112
SUBSTRATE CONNECTED TO V
EE
-40°C to +85°C 8 µMAX-8
U8-1
+Denotes lead-free package.
Pin Configurations
TOP VIEW
DISABLE1
DISABLE2
DISABLE3
1
2
3
4
5
6
7
8
16 OUT2
15 IN2-
14 IN2+
DISABLE1
DISABLE2
DISABLE3
1
2
3
4
5
6
7
14 OUT2
13 IN2-
12 IN2+
N.C.
IN-
1
2
3
4
8
7
6
5
DISABLE
V
MAX4188
MAX4189
13 VEE
V
CC
CC
MAX4190
V
CC
11
V
EE
MAX4188
MAX4189
IN+
OUT
N.C.
IN1+
IN1-
12 IN3+
11 IN3-
10 OUT3
V
EE
IN1+
IN1-
10 IN3+
9
8
IN3-
OUT1
N.C.
SO/µMAX
OUT1
OUT3
9
N.C.
SO
QSOP
20 ______________________________________________________________________________________
Single/Triple, Low-Glitch, 250MHz, Current-
Feedback Amplifiers with High-Speed Disable
Package Information
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information
go to www.maxim-ic.com/packages.)
INCHES
MILLIMETERS
DIM
A
MIN
MAX
0.069
0.010
0.019
0.010
MIN
1.35
0.10
0.35
0.19
MAX
1.75
0.25
0.49
0.25
0.053
0.004
0.014
0.007
N
A1
B
C
e
0.050 BSC
1.27 BSC
E
0.150
0.228
0.016
0.157
0.244
0.050
3.80
5.80
0.40
4.00
6.20
1.27
E
H
H
L
VARIATIONS:
INCHES
1
MILLIMETERS
DIM
D
MIN
MAX
0.197
0.344
0.394
MIN
4.80
8.55
9.80
MAX
5.00
N
8
MS012
AA
TOP VIEW
0.189
0.337
0.386
D
8.75 14
10.00 16
AB
D
AC
D
C
A
B
0∞-8∞
e
A1
L
FRONT VIEW
SIDE VIEW
PROPRIETARY INFORMATION
TITLE:
PACKAGE OUTLINE, .150" SOIC
APPROVAL
DOCUMENT CONTROL NO.
REV.
1
21-0041
B
1
______________________________________________________________________________________ 21
Single/Triple, Low-Glitch, 250MHz, Current-
Feedback Amplifiers with High-Speed Disable
Package Information (continued)
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information
go to www.maxim-ic.com/packages.)
PACKAGE OUTLINE, QSOP .150", .025" LEAD PITCH
1
21-0055
F
1
22 ______________________________________________________________________________________
Single/Triple, Low-Glitch, 250MHz, Current-
Feedback Amplifiers with High-Speed Disable
Package Information (continued)
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information
go to www.maxim-ic.com/packages.)
4X S
8
8
MILLIMETERS
INCHES
DIM MIN
MAX
MAX
MIN
-
-
0.043
0.006
0.037
0.014
0.007
0.120
1.10
0.15
0.95
0.36
0.18
3.05
A
0.002
0.030
0.010
0.005
0.116
0.05
0.75
0.25
0.13
2.95
A1
A2
b
E
H
Ø0.50±0.1
c
D
e
0.0256 BSC
0.65 BSC
0.6±0.1
E
H
0.116
0.188
0.016
0°
0.120
2.95
4.78
0.41
0°
3.05
5.03
0.66
6°
0.198
0.026
6°
L
1
1
α
S
0.6±0.1
0.0207 BSC
0.5250 BSC
BOTTOM VIEW
D
TOP VIEW
A1
A2
A
c
α
e
L
b
SIDE VIEW
FRONT VIEW
PROPRIETARY INFORMATION
TITLE:
PACKAGE OUTLINE, 8L uMAX/uSOP
APPROVAL
DOCUMENT CONTROL NO.
REV.
1
21-0036
J
1
Revision History
Pages changed at Rev 1: 1–12, 15–17, 19–23
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are
implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 23
© 2007 Maxim Integrated Products
is a registered trademark of Maxim Integrated Products, Inc.
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