MAX4231AYT+TG65 [MAXIM]
High-Output-Drive, 10MHz, 10V/μs, Rail-to-Rail I/O Op Amps with Shutdown in SC70; 高输出驱动， 10MHz的， 10V / μs的轨至轨输入/输出运算放大器，带有关断，SC70封装
| 型号： | MAX4231AYT+TG65 |
| 厂家： | 
MAXIM INTEGRATED PRODUCTS |
| 描述： | High-Output-Drive, 10MHz, 10V/μs, Rail-to-Rail I/O Op Amps with Shutdown in SC70 |
| 文件： | 总27页 (文件大小：774K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
19-2164; Rev 11; 9/09
High-Output-Drive, 10MHz, 10V/µs,
Rail-to-Rail I/O Op Amps with Shutdown in SC70
0–MAX234
General Description
Features
The MAX4230–MAX4234 single/dual/quad, high-output-
drive CMOS op amps feature 200mA of peak output
current, rail-to-rail input, and output capability from a
single 2.7V to 5.5V supply. These amplifiers exhibit a
high slew rate of 10V/µs and a gain-bandwidth product
(GBWP) of 10MHz. The MAX4230–MAX4234 can drive
typical headset levels (32Ω), as well as bias an RF
power amplifier (PA) in wireless handset applications.
o 200mA Output Drive Capability
o Rail-to-Rail Input and Output
o 1.1mA Supply Current per Amplifier
o 2.7V to 5.5V Single-Supply Operation
o 10MHz Gain-Bandwidth Product
o High Slew Rate: 10V/µs
o 100dB Voltage Gain (R = 100kΩ)
L
The MAX4230 comes in a tiny 5-pin SC70 package and
the MAX4231, single with shutdown, is offered in a
6-pin SC70 package and in 1.5mm x 1.0mm ultra-thin
UCSP and µDFN packages. The dual op-amp MAX4233
is offered in the space-saving 10-bump chip-scale
package (UCSP™), providing the smallest footprint
area for a dual op amp with shutdown.
o 85dB Power-Supply Rejection Ratio
o No Phase Reversal for Overdriven Inputs
o Unity-Gain Stable for Capacitive Loads to 780pF
o Low-Power Shutdown Mode Reduces Supply
Current to < 1µA
These op amps are designed to be part of the PA con-
trol circuitry, biasing RF PAs in wireless headsets. The
MAX4231/MAX4233 offer a SHDN feature that drives
the output low. This ensures that the RF PA is fully dis-
abled when needed, preventing unconverted signals to
the RF antenna.
o Available in 5-Pin SC70 Package (MAX4230)
and 6-Pin, UCSP and Thin µDFN Packages
(MAX4231)
o Available in 10-Bump UCSP Package (MAX4233)
Ordering Information
The MAX4230 family offers low offsets, wide bandwidth,
and high-output drive in a tiny 2.1mm x 2.0mm space-
saving SC70 package. These parts are offered over the
automotive temperature range (-40°C to +125°C).
TOP
MARK
PIN-
PACKAGE
PART
TEMP RANGE
MAX4230AXK+T
MAX4230AUK+T
MAX4231AXT+T
MAX4231AUT+T
MAX4231ART+T
-40°C to +125°C 5 SC70
-40°C to +125°C 5 SOT23
-40°C to +125°C 6 SC70
-40°C to +125°C 6 SOT23
-40°C to +125°C 6 UCSP
ACS
ABZZ
ABA
Applications
RF PA Biasing Controls in Handset Applications
Portable/Battery-Powered Audio Applications
Portable Headphone Speaker Drivers (32Ω)
Audio Hands-Free Car Phones (Kits)
Laptop/Notebook Computers/TFT Panels
Sound Ports/Cards
ABNF
AAM
+AI
MAX4231AYT+TG65 -40°C to +125°C 6 Thin µDFN
+Denotes a lead-free(Pb)/RoHS-compliant package.
T = Tape and reel.
Ordering Information continued at end of data sheet.
Typical Operating Circuit
Set-Top Boxes
ANTENNA
Digital-to-Analog Converter Buffers
Transformer/Line Drivers
2.7V TO 5.5V
PA
Motor Drivers
I
= 30mA
OUT
DAC
R
ISO
MAX4231
SHDN
C
LOAD
Selector Guide appears at end of data sheet.
Pin Configurations appear at end of data sheet.
C
UCSP is a trademark of Maxim Integrated Products, Inc.
R
R
F
________________________________________________________________ Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim's website at www.maxim-ic.com.
High-Output-Drive, 10MHz, 10V/µs,
Rail-to-Rail I/O Op Amps with Shutdown in SC70
ABSOLUTE MAXIMUM RATINGS
Supply Voltage (V
to V )....................................................6V
8-Pin µMAX® (derate 4.5mW/°C above +70°C) ..........362mW
10-Pin µMAX (derate 5.6mW/°C above +70°C) ..........444mW
10-Bump UCSP (derate 6.1mW/°C above +70°C) .....484mW
14-Pin SO (derate 8.3mW/°C above +70°C) ...............667mW
Operating Temperature Range .........................-40°C to +125°C
Junction Temperature......................................................+150°C
Storage Temperature Range.............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
Bump Temperature (soldering, reflow)*...........................+200°C
DD
SS
All Other Pins....................................(V - 0.3V) + (V
+ 0.3V)
SS
DD
Output Short-Circuit Duration to V or V (Note 1) ................10s
DD
SS
Continuous Power Dissipation (T = +70°C)
A
5-Pin SC70 (derate 3.1mW/°C above +70°C)..............247mW
5-Pin SOT23 (derate 7.1mW/°C above +70°C)............571mW
6-Pin SC70 (derate 3.1mW/°C above +70°C)..............245mW
6-Pin SOT23 (derate 8.7mW/°C above +70°C)............696mW
6-Pin Thin µDFN (derate 2.1mW/°C above +70°C)...170.2mW
6-Bump UCSP (derate 3.9mW/°C above +70°C) .....308.3mW
8-Pin SOT23 (derate 8.9mW/°C above +70°C)............714mW
*Hand soldering is not recommended.
Note 1: Package power dissipation should also be observed.
µMAX is a registered trademark of Maxim Integrated Products, Inc.
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
(V
= 2.7V, V = 0V, V
= V /2, V
= (V /2), R = ∞ connected to (V /2), V
= V , T = +25°C, unless otherwise
SHDN DD A
DD
SS
CM
DD
OUT
DD
L
DD
noted.) (Note 2)
0–MAX234
PARAMETER
SYMBOL
CONDITIONS
Inferred from PSRR test
MIN
TYP
MAX
5.5
6
UNITS
V
Operating Supply Voltage Range
Input Offset Voltage
Input Bias Current
V
V
2.7
DD
OS
0.85
50
mV
pA
I
V
V
= V to V
SS
B
CM
CM
DD
DD
Input Offset Current
Input Resistance
I
= V to V
50
pA
OS
SS
R
1000
MΩ
IN
Common-Mode Input Voltage
Range
V
Inferred from CMRR test
V
V
DD
V
CM
SS
Common-Mode Rejection Ratio
Power-Supply Rejection Ratio
Shutdown Output Impedance
Output Voltage in Shutdown
CMRR
PSRR
V
V
V
V
< V
< V
DD
52
70
85
10
68
100
98
80
400
360
80
70
8
dB
dB
Ω
SS
CM
= 2.7V to 5.5V
73
DD
R
= 0V (Note 3)
OUT
OUT(SHDN)
SHDN
SHDN
V
= 0V, R = 200Ω (Note 3)
120
mV
L
R = 100kΩ
L
V
< V
+ 0.20V < V
OUT
SS
Large-Signal Voltage Gain
A
R = 2kΩ
L
85
74
dB
VOL
- 0.20V
DD
R = 200Ω
L
V
V
V
V
V
V
- V
500
500
120
120
14
DD
OL
DD
OL
DD
OL
OH
R = 32Ω
L
- V
- V
SS
OH
SS
Output Voltage Swing
V
R = 200Ω
mV
OUT
OUT
L
- V
- V
OH
SS
R = 2kΩ
L
- V
7
14
V
V
= 2.7V, V
=
100mV
100mV
70
DD
DD
IN
=
Output Source/Sink Current
Output Voltage
I
mA
mV
= 5V, V
200
IN
V
V
V
V
- V
128
112
240
224
200
175
320
300
DD
OL
DD
OL
OH
I = 10mA
L
V
V
= 2.7V
= 5V
DD
DD
- V
- V
SS
OH
SS
I = 30mA
L
- V
2
_______________________________________________________________________________________
High-Output-Drive, 10MHz, 10V/µs,
Rail-to-Rail I/O Op Amps with Shutdown in SC70
0–MAX234
DC ELECTRICAL CHARACTERISTICS (continued)
(V
= 2.7V, V = 0V, V
= V /2, V
= (V /2), R = ∞ connected to (V /2), V
= V , T = +25°C, unless otherwise
SHDN DD A
DD
SS
CM
DD
OUT
DD
L
DD
noted.) (Note 2)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
1.2
1.1
0.5
0.1
MAX
2.3
2.0
1
UNITS
V
V
= 5.5V, V
= 2.7V, V
= V
= V
/ 2
/ 2
DD
DD
CM
CM
DD
DD
Quiescent Supply Current (per
Amplifier)
I
mA
DD
V
V
= 5.5V
DD
DD
Shutdown Supply Current (per
Amplifier) (Note 3)
I
V
= 0V, R = ∞
µA
DD(SHDN)
S HDN
L
= 2.7V
1
V
Shutdown mode
Normal mode
0.8
IL
SHDN Logic Threshold (Note 3)
SHDN Input Bias Current
V
V
V
x 0.57
DD
IH
V
< V
< V (Note 3)
DD
50
pA
SS
S HDN
DC ELECTRICAL CHARACTERISTICS
(V
= 2.7V, V = 0V, V
= V /2, V
= (V /2), R = ∞ connected to (V /2), V
= V , T = -40 to +125°C, unless other-
DD
SS
CM
DD
OUT
DD
L
DD
SHDN
DD
A
wise noted.) (Note 2)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
5.5
8
UNITS
V
Operating Supply Voltage Range
Input Offset Voltage
V
DD
V
OS
Inferred from PSRR test
2.7
mV
Offset-Voltage Tempco
ΔV /ΔT
3
µV/°C
OS
Common-Mode Input Voltage Range
V
Inferred from CMRR test
V
V
DD
V
CM
SS
Common-Mode Rejection Ratio
Power-Supply Rejection Ratio
Output Voltage in Shutdown
CMRR
PSRR
V
V
V
< V
< V
DD
46
70
dB
dB
mV
SS
CM
= 2.7V to 5.5V
DD
V
< 0V, R = 200Ω (Note 3)
150
OUT(SHDN)
SHDN
L
R = 2kΩ
76
67
L
Large-Signal Voltage Gain
A
V
+ 0.2V < V - 0.2V
DD
dB
VOL
SS
R = 200Ω
L
V
V
V
V
V
V
V
V
- V
650
650
150
150
20
DD
OL
DD
OL
DD
OL
DD
OL
OH
R = 32Ω, T = +85°C
L
A
- V
- V
SS
OH
SS
Output Voltage Swing
V
R = 200Ω
L
mV
OUT
- V
- V
OH
SS
R = 2kΩ
L
- V
- V
20
250
230
OH
SS
I = 10mA
L
V
V
= 2.7V
= 5V
DD
DD
- V
Output Voltage
mV
I = 30mA,
L
V
V
- V
400
370
DD
OL
OH
T
A
= -40°C
- V
SS
to +85°C
_______________________________________________________________________________________
3
High-Output-Drive, 10MHz, 10V/µs,
Rail-to-Rail I/O Op Amps with Shutdown in SC70
DC ELECTRICAL CHARACTERISTICS (continued)
(V
= 2.7V, V = 0V, V
= V /2, V
= (V /2), R = ∞ connected to (V /2), V
= V , T = -40 to +125°C, unless other-
DD
SS
CM
DD
OUT
DD
L
DD
SHDN
DD
A
wise noted.) (Note 2)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
2.8
2.5
2.0
UNITS
V
V
= 5.5V, V
= 2.7V, V
= V /2
DD
DD
DD
CM
CM
Quiescent Supply Current
(per Amplifier)
I
mA
DD
= V /2
DD
V
V
= 5.5V
= 2.7V
DD
DD
Shutdown Supply Current
(per Amplifier) (Note 3)
I
V
< 0V, R = ∞
µA
V
DD(SHDN)
SHDN
L
2.0
V
Shutdown mode
Normal mode
0.8
IL
SHDN Logic Threshold (Note 3)
V
V
x 0.61
DD
IH
AC ELECTRICAL CHARACTERISTICS
(V = 2.7V, V = 0V, V
= V /2, V
= (V /2), R = ∞ connected to (V /2), V
= V , T = +25°C, unless otherwise noted.)
DD
SS
CM
DD
OUT
DD
L
DD
SHDN
DD
A
(Note 2)
PARAMETER
SYMBOL
GBWP
FPBW
SR
CONDITIONS
MIN
TYP
10
MAX
UNITS
MHz
0–MAX234
Gain-Bandwidth Product
Full-Power Bandwidth
Slew Rate
V
= V /2
CM DD
V
= 2V , V
= 5V
0.8
10
MHz
OUT
P-P DD
V/µs
Phase Margin
PM
70
Degrees
dB
Gain Margin
GM
15
Total Harmonic Distortion Plus
Noise
THD+N
f = 10kHz, V
= 2V , A
= 1V/V
0.0005
%
OUT
P-P VCL
Input Capacitance
C
8
15
12
125
780
1
pF
IN
f = 1kHz
Voltage-Noise Density
e
nV/√Hz
n
f = 10kHz
Channel-to-Channel Isolation
Capacitive-Load Stability
Shutdown Time
f = 1kHz, R = 100kΩ
dB
pF
µs
µs
µs
L
A
= 1V/V, no sustained oscillations
VCL
t
(Note 3)
(Note 3)
SHDN
Enable Time from Shutdown
Power-Up Time
t
1
ENABLE
t
5
ON
Note 2: All units 100% tested at +25°C. All temperature limits are guaranteed by design.
Note 3: SHDN logic parameters are for the MAX4231/MAX4233 only.
4
_______________________________________________________________________________________
High-Output-Drive, 10MHz, 10V/µs,
Rail-to-Rail I/O Op Amps with Shutdown in SC70
0–MAX234
__________________________________________Typical Operating Characteristics
(V = 2.7V, V = 0V, V
= V /2, V
= V /2, R = ∞, connected to V /2, V
= V , T = +25°C, unless otherwise noted.)
SHDN DD A
DD
SS
CM
DD
OUT
DD
L
DD
GAIN AND PHASE vs. FREQUENCY
(C = 250pF)
GAIN AND PHASE vs. FREQUENCY
L
MAX4230 toc01
MAX4230 toc02
70
120
70
60
50
120
90
60
50
90
60
60
40
30
30
0
40
30
30
0
20
-30
20
-30
10
-60
10
-60
0
-90
0
-90
-10
-20
-30
-120
-150
-180
-10
-20
-30
-120
-150
-180
A
= 1000V/V
V
L
A
= 1000V/V
C = 250pF
V
0.01k 0.1k 1k
10k 100k 1M 10M 100M
0.01k 0.1k 1k
10k 100k 1M 10M 100M
FREQUENCY (Hz)
FREQUENCY (Hz)
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY
OUTPUT IMPEDANCE vs. FREQUENCY
1000
100
10
0
-10
-20
-30
-40
-50
-60
-70
-80
-90
-100
1
0.1
A
V
= 1V/V
1M
A = 1V/V
V
0.01
0.01k 0.1k
1k
10k 100k
10M
1k
10k
100k
1M
10M
FREQUENCY (Hz)
FREQUENCY (Hz)
SUPPLY CURRENT vs. TEMPERATURE
(SHDN = LOW)
SUPPLY CURRENT vs. TEMPERATURE
2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
110
100
90
80
70
60
SHDN = V
SS
50
-40 -20
0
20 40 60 80 100 120
-40 -20
0
20 40 60 80 100 120
TEMPERATURE (°C)
TEMPERATURE (°C)
_______________________________________________________________________________________
5
High-Output-Drive, 10MHz, 10V/µs,
Rail-to-Rail I/O Op Amps with Shutdown in SC70
____________________________Typical Operating Characteristics (continued)
(V = 2.7V, V = 0V, V
= V /2, V
= V /2, R = ∞, connected to V /2, V
= V , T = +25°C, unless otherwise noted.)
SHDN DD A
DD
SS
CM
DD
OUT
DD
L
DD
SUPPLY CURRENT PER AMPLIFIER
vs. SUPPLY VOLTAGE
INPUT OFFSET VOLTAGE
vs. TEMPERATURE
OUTPUT SWING HIGH
vs. TEMPERATURE
2
1
2.0
V
= 5.0V
R = 200Ω
DD
L
100
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
V
= 2.7V
DD
80
V
= 2.7V
DD
R = 200Ω
L
60
40
20
0
V
= 5.0V
0
DD
-1
-2
2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
SUPPLY VOLTAGE (V)
-40 -20
0
20 40 60 80 100 120
TEMPERATURE (°C)
20
TEMPERATURE (°C)
100
120
-40 -20
0
40 60 80
0–MAX234
INPUT OFFSET VOLTAGE
vs. COMMON-MODE VOLTAGE
OUTPUT SWING LOW
vs. TEMPERATURE
SUPPLY CURRENT PER AMPLIFIER
vs. COMMON-MODE VOLTAGE
1.0
0.5
0
140
120
100
80
1.2
V
= 5.0V
DD
1.0
0.8
R = 200Ω
L
-0.5
-1.0
60
V
= 2.7V
DD
L
0.6
0.4
0.2
R = 200Ω
40
-1.5
-2.0
V
DD
= 2.7V
2.0
20
0
1.5
COMMON-MODE VOLTAGE (V)
0
0.5
1.0
2.0
2.5
1.5
-40 -20
0
20 40 60 80 100 120
0
0.5
1.0
2.5
TEMPERATURE (°C)
COMMON-MODE VOLTAGE (V)
TOTAL HARMONIC DISTORTION PLUS NOISE
vs. PEAK-TO-PEAK OUTPUT VOLTAGE
SUPPLY CURRENT PER AMPLIFIER
vs. COMMON-MODE VOLTAGE
TOTAL HARMONIC DISTORTION
PLUS NOISE vs. FREQUENCY
10
0.45
1.4
1.2
1.0
0.8
0.6
0.4
0.2
f = 10kHz
V
= 2V
P-P
OUT
0.40
0.35
V
= 5V
R = 100kΩ
L
500kHz LOWPASS FILTER
DD
R = 2kΩ
L
1
R = 250Ω
L
R = 25Ω
L
0.30
0.25
0.1
0.20
0.15
0.10
V
= 5.0V
DD
R = 32Ω
L
0.001
0.05
0
R = 10kΩ
L
0.0001
4.8
4.0
4.2
4.4
4.6
5.0
0
0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
COMMON-MODE VOLTAGE (V)
10
100
1k
FREQUENCY (Hz)
10k
100k
PEAK-TO-PEAK OUTPUT VOLTAGE (V)
6
_______________________________________________________________________________________
High-Output-Drive, 10MHz, 10V/µs,
Rail-to-Rail I/O Op Amps with Shutdown in SC70
0–MAX234
____________________________Typical Operating Characteristics (continued)
(V = 2.7V, V = 0V, V
= V /2, V
= V /2, R = ∞, connected to V /2, V
= V , T = +25°C, unless otherwise noted.)
SHDN DD A
DD
SS
CM
DD
OUT
DD
L
DD
SMALL-SIGNAL TRANSIENT
RESPONSE (NONINVERTING)
SMALL-SIGNAL TRANSIENT
RESPONSE (INVERTING)
LARGE-SIGNAL TRANSIENT
RESPONSE (NONINVERTING)
MAX4230/34 toc17
MAX4230/34 toc16
MAX4230/34 toc18
IN
IN
IN
1V/div
OUT
50mV/div
OUT
50mV/div
OUT
400ns/div
400ns/div
400ns/div
OUTPUT CURRENT vs. OUTPUT VOLTAGE
LARGE-SIGNAL TRANSIENT
RESPONSE (INVERTING)
OUTPUT CURRENT vs. OUTPUT VOLTAGE
(SOURCING, V = 2.7V)
(SINKING, V = 2.7V)
DD
DD
MAX4230/34 toc19
0
-10
-20
-30
-40
-50
-60
-70
-80
80
70
60
50
40
30
20
10
0
V
= 100mV
V
= 100mV
DIFF
DIFF
IN
1V/div
OUT
1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4 2.6 2.8 3.0
OUTPUT VOLTAGE (V)
400ns/div
0
0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6
OUTPUT VOLTAGE (V)
INPUT VOLTAGE NOISE
vs. FREQUENCY
OUTPUT CURRENT vs. OUTPUT VOLTAGE
(SOURCING, V = 5.0V)
OUTPUT CURRENT vs. OUTPUT VOLTAGE
(SINKING, V = 5.0V)
DD
DD
200
100
250
200
150
100
50
0
-50
V
= 100mV
V
= 100mV
DIFF
DIFF
-100
-150
-200
-250
0
10
100
0
0.5
1.0
OUTPUT VOLTAGE (V)
1.5
2.0
2.5
3.0
1k
10k
100k
2.0
2.5
3.0
OUTPUT VOLTAGE (V)
3.5
4.0
4.5
5.0
FREQUENCY (Hz)
_______________________________________________________________________________________
7
High-Output-Drive, 10MHz, 10V/µs,
Rail-to-Rail I/O Op Amps with Shutdown in SC70
Pin Description
PIN
MAX4231
MAX4234
TSSOP/
SO
MAX4230
SOT23/
SC70
MAX4232
SOT23/
µMAX
NAME
FUNCTION
MAX4231
UCSP
MAX4233 MAX4233
SOT23/
SC70/Thin
µDFN
µMAX
UCSP
1
2
1
B1
A1
—
4
—
4
—
—
IN+
Noninverting Input
Negative Supply Input. Connect to
ground for single-supply operation.
2
B4
11
V
SS
3
4
5
3
4
6
B2
A2
A3
—
—
8
—
—
10
—
—
—
—
4
IN-
Inverting Input
OUT
Amplifier Output
Positive Supply Input
B1
V
DD
SHDN,
SHDN1,
SHDN2
Shutdown Control. Tie to high for normal
operation.
—
5
B3
—
5, 6
C4, A4
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
3
2
3
2
C3
C2
C1
A3
A2
A1
—
3
IN1+
IN1-
Noninverting Input to Amplifier 1
Inverting Input to Amplifier 1
Amplifier 1 Output
0–MAX234
2
1
1
1
5
OUT1
IN2+
IN2-
5
7
Noninverting Input to Amplifier 2
Inverting Input to Amplifier 2
Amplifier 2 Output
6
8
6
7
9
7
OUT2
IN3+,
—
—
—
—
10, 12
9, 13
Noninverting Input to Amplifiers 3 and 4
—
IN3-, IN4- Inverting Input to Amplifiers 3 and 4
OUT3,
—
—
—
—
—
—
8, 14
Amplifiers 3 and 4 Outputs
OUT4
types offered. There are some exceptions to this rule,
however. The absolute maximum power-dissipation rating
of each package should always be verified using the fol-
lowing equations. The equation below gives an approxi-
mation of the package power dissipation:
Detailed Description
Rail-to-Rail Input Stage
The MAX4230–MAX4234 CMOS operational amplifiers
have parallel-connected n- and p-channel differential
input stages that combine to accept a common-mode
range extending to both supply rails. The n-channel
stage is active for common-mode input voltages typi-
P
≅ V
I
COS θ
IC DISS
RMS RMS
(
)
where:
= RMS voltage from V
current and RMS voltage from V
ing current.
cally greater than (V
+ 1.2V), and the p-channel
SS
V
RMS
to V
OUT
when sourcing
OUT
DD
stage is active for common-mode input voltages typi-
to V when sink-
SS
cally less than (V - 1.2V).
DD
Applications Information
I
= RMS current flowing out of or into the op amp
RMS
and the load.
Package Power Dissipation
Warning: Due to the high output current drive, this op
amp can exceed the absolute maximum power-dissi-
pation rating. As a general rule, as long as the peak cur-
rent is less than or equal to 40mA, the maximum package
power dissipation is not exceeded for any of the package
θ = phase difference between the voltage and the cur-
rent. For resistive loads, COS θ = 1.
8
_______________________________________________________________________________________
High-Output-Drive, 10MHz, 10V/µs,
Rail-to-Rail I/O Op Amps with Shutdown in SC70
0–MAX234
R
F
3.6V
C
IN
R
IN
C
LEFT
OUT
AUDIO INPUT
HEADPHONE JACK
TO 32Ω STEREO
HEADSET
R
R
C
V
IN
= 2V
P-P
V
BIAS
MAX4230
MAX4230
MAX4231
C
IN
R
IN
32Ω
RIGHT
C
OUT
AUDIO INPUT
R
F
Figure 1. MAX4230/MAX4231 Used in Single-Supply Operation
Circuit Example
Figure 2. Circuit Example: Adding a Coupling Capacitor
Greatly Reduces Power Dissipation of its Package
For example, the circuit in Figure 1 has a package
power dissipation of 196mW:
V
PEAK
V
≅
=
RMS
2
V
PEAK
1.0V
≅ V
− V
+
(
)
RMS
DD
DC
= 0.707V
RMS
2
2
1.0V
I
1.0V/32Ω
= 3.6V − 1.8V +
= 2.507V
RMS
PEAK
I
≅ I
+
= 0A +
RMS
DC
2
2
2
I
1.8V
32Ω
1.0V/32Ω
PEAK
= 22.1mA
I
≅ I
+
=
+
RMS
RMS
DC
2
2
Therefore:
= 78.4mA
RMS
P
= V
I COS θ
IC(DISS)
RMS RMS
where:
= 15.6mW
V
DC
= the DC component of the output voltage.
= the DC component of the output current.
= the highest positive excursion of the AC com-
If the configuration in Figure 1 were used with all four of
the MAX4234 amplifiers, the absolute maximum power-
dissipation rating of this package would be exceeded
(see the Absolute Maximum Ratings section).
I
DC
V
PEAK
ponent of the output voltage.
I
= the highest positive excursion of the AC com-
PEAK
60mW Single-Supply Stereo
Headphone Driver
Two MAX4230/MAX4231s can be used as a single-sup-
ply, stereo headphone driver. The circuit shown in
Figure 2 can deliver 60mW per channel with 1% distor-
tion from a single 5V supply.
ponent of the output current.
Therefore:
P
= V
I
COS θ
IC(DISS)
RMS RMS
= 196mW
Adding a coupling capacitor improves the package
power dissipation because there is no DC current to the
load, as shown in Figure 2:
The input capacitor (C ), in conjunction with R , forms
IN
IN
a highpass filter that removes the DC bias from the
incoming signal. The -3dB point of the highpass filter is
given by:
1
f
=
−3dB
2πR C
IN IN
_______________________________________________________________________________________
9
High-Output-Drive, 10MHz, 10V/µs,
Rail-to-Rail I/O Op Amps with Shutdown in SC70
C1
0.1μF
R1
16kΩ
R2
82kΩ
V
= 3.0V
CC
R = 100kΩ
L
0.5V
P-P
1/2
3V
IN
1V/div
3V
MAX4232
8
2
1
R5
51kΩ
3
32Ω
fs = 100Hz
4
R4
R3
10kΩ
10kΩ
OUT
1V/div
C2
0.1μF
6
5
R6
51kΩ
7
1/2
5μs/div
MAX4232
Figure 3. Dual MAX4230/MAX4231 Bridge Amplifier for 200mW
at 3V
Figure 4. Rail-to-Rail Input/Output Range
Choose gain-setting resistors R and R according to
Rail-to-Rail Output Stage
IN
F
0–MAX234
the amount of desired gain, keeping in mind the maxi-
mum output amplitude. The output coupling capacitor,
The minimum output is within millivolts of ground for sin-
gle-supply operation, where the load is referenced to
C
, blocks the DC component of the amplifier out-
ground (V ). Figure 4 shows the input voltage range
SS
OUT
put, preventing DC current flowing to the load. The out-
put capacitor and the load impedance form a highpass
filer with the -3dB point determined by:
and the output voltage swing of a MAX4230 connected
as a voltage follower. The maximum output voltage
swing is load dependent; however, it is guaranteed to
be within 500mV of the positive rail (V
= 2.7V) even
DD
with maximum load (32Ω to ground).
1
f
=
−3dB
2πR C
Observe the Absolute Maximum Ratings for power dis-
sipation and output short-circuit duration (10s, max)
because the output current can exceed 200mA (see
the Typical Operating Characteristics.)
L
OUT
For a 32Ω load, a 100µF aluminum electrolytic capaci-
tor gives a low-frequency pole at 50Hz.
Bridge Amplifier
The circuit shown in Figure 3 uses a dual MAX4230 to
implement a 3V, 200mW amplifier suitable for use in
size-constrained applications. This configuration elimi-
nates the need for the large coupling capacitor
required by the single op-amp speaker driver when sin-
gle-supply operation is necessary. Voltage gain is set
to 10V/V; however, it can be changed by adjusting the
82kΩ resistor value.
Input Capacitance
One consequence of the parallel-connected differential
input stages for rail-to-rail operation is a relatively large
input capacitance C (5pF typ). This introduces a pole
IN
-1
at frequency (2πR′C ) , where R′ is the parallel combi-
IN
nation of the gain-setting resistors for the inverting or
noninverting amplifier configuration (Figure 5). If the pole
frequency is less than or comparable to the unity-gain
bandwidth (10MHz), the phase margin is reduced, and
the amplifier exhibits degraded AC performance through
either ringing in the step response or sustained oscilla-
tions. The pole frequency is 10MHz when R′ = 2kΩ. To
maximize stability, R′ << 2kΩ is recommended.
Rail-to-Rail Input Stage
The MAX4230–MAX4234 CMOS op amps have parallel-
connected n- and p-channel differential input stages
that combine to accept a common-mode range extend-
ing to both supply rails. The n-channel stage is active
for common-mode input voltages typically greater than
(V
+ 1.2V), and the p-channel stage is active for
SS
common-mode input voltages typically less than (V
-
DD
1.2V).
10 ______________________________________________________________________________________
High-Output-Drive, 10MHz, 10V/µs,
Rail-to-Rail I/O Op Amps with Shutdown in SC70
0–MAX234
2500
C
INVERTING
f
2000
1500
1000
500
0
UNSTABLE
R
f
R
V
IN
STABLE
V
OUT
MAX4230
R′ = R || R
f
R C = RC
f
f
IN
V
= 5.0V
DD
DD
L
R TO V /2
1
10
100
1k
10k
100k
RESISTIVE LOAD (Ω)
NONINVERTING
V
IN
Figure 6. Capacitive-Load Stability
V
OUT
MAX4230
R
f
C
f
20mV/div
20mV/div
R′ = R || R
f
R
R C = RC
f
f
IN
V
= 3.0V, C = 1500pF
L
DD
R = 100kΩ, R = 0Ω
L
ISO
Figure 5. Inverting and Noninverting Amplifiers with Feedback
Compensation
1μs/div
Figure 7. Small-Signal Transient Response with Excessive
Capacitive Load
To improve step response when R′ > 2kΩ, connect
small capacitor C between the inverting input and out-
f
put. Choose C as follows:
f
C = 8(R / R ) [pf]
f
f
where R is the feedback resistor and R is the gain-set-
f
ting resistor (Figure 5).
20mV/div
20mV/div
Driving Capacitive Loads
The MAX4230–MAX4234 have a high tolerance for
capacitive loads. They are stable with capacitive loads
up to 780pF. Figure 6 is a graph of the stable operating
region for various capacitive loads vs. resistive loads.
Figures 7 and 8 show the transient response with
excessive capacitive loads (1500pF), with and without
the addition of an isolation resistor in series with the
output. Figure 9 shows a typical noninverting capaci-
tive-load-driving circuit in the unity-gain configuration.
V
= 3.0V, C = 1500pF
L
DD
R = 100kΩ, R = 39Ω
L
ISO
1μs/div
Figure 8. Small-Signal Transient Response with Excessive
Capacitive Load with Isolation Resistor
______________________________________________________________________________________ 11
High-Output-Drive, 10MHz, 10V/µs,
Rail-to-Rail I/O Op Amps with Shutdown in SC70
SHDN
2V/div
I
DD
R
ISO
1mA/div
C
L
OUT
2V/div
100μs/div
Figure 9. Capacitive-Load-Driving Circuit
Figure 11. Shutdown Enable/Disable Supply Current
0–MAX234
1V/div
V
DD
2V/div
I
DD
1V/div
1mA/div
4μs/div
40μs/div
Figure 10. Shutdown Output Voltage Enable/Disable
Figure 12. Power-Up/Down Supply Current
The resistor improves the circuit’s phase margin by iso-
lating the load capacitor from the op amp’s output.
Selector Guide
AMPS PER
PACKAGE
SHUTDOWN
MODE
PART
Power-Up and Shutdown Modes
The MAX4231/MAX4233 have a shutdown option. When
the shutdown pin (SHDN) is pulled low, supply current
MAX4230
MAX4231
MAX4232
MAX4233
MAX4234
Single
Single
Dual
—
Yes
—
drops to 0.5µA per amplifier (V
= 2.7V), the ampli-
DD
fiers are disabled, and their outputs are driven to V
.
SS
Dual
Yes
—
Since the outputs are actively driven to V
in shut-
SS
down, any pullup resistor on the output causes a cur-
rent drain from the supply. Pulling SHDN high enables
the amplifier. In the dual MAX4233, the two amplifiers
shut down independently. Figure 10 shows the
MAX4231’s output voltage to a shutdown pulse. The
MAX4231–MAX4234 typically settle within 5µs after
Quad
When exiting shutdown, there is a 6µs delay before the
amplifier’s output becomes active (Figure 10).
power-up. Figures 11 and 12 show I
plus and voltage power-up cycle.
to a shutdown
DD
12 ______________________________________________________________________________________
High-Output-Drive, 10MHz, 10V/µs,
Rail-to-Rail I/O Op Amps with Shutdown in SC70
0–MAX234
Pin Configurations
TOP VIEW
+
+
V
SHDN
5
OUT
4
DD
1
2
3
5
V
DD
IN+
OUT1
IN1-
1
2
3
4
8
7
6
5
V
DD
IN+
1
2
3
6
5
4
V
DD
MAX4231
6
OUT2
IN2-
MAX4230
MAX4232
V
SS
V
SS
SHDN
OUT
IN1+
MAX4231
V
SS
IN2+
IN-
4
OUT
IN-
1
2
3
+
IN+
V
IN-
SS
SOT23/µMAX
SOT23/SC70
SC70/SOT23
Thin µDFN
1
2
3
1
2
3
4
+
OUT1
IN1-
1
14
OUT4
IN4-
OUT1
IN1-
1
2
3
4
5
10 V
DD
A
A
B
V
OUT2
OUT
V
IN2-
IN2+
SS
DD
2
3
4
5
6
7
13
12
11
10
9
9
8
7
6
OUT2
IN2-
SHDN2
MAX4233
IN1+
IN4+
IN1+
V
DD
V
SS
V
DD
MAX4234
V
MAX4233
MAX4233
V
IN2+
SS
SS
IN2+
IN2-
IN3+
IN3-
SHDN1
SHDN2
B
C
IN-
SHDN
IN1-
IN1+
IN+
OUT1
µMAX
OUT2
8
OUT3
SHDN1
UCSP
UCSP
TSSOP/SO
Power Supplies and Layout
Ordering Information (continued)
The MAX4230–MAX4234 can operate from a single
2.7V to 5.5V supply, or from dual 1.35V to 2.5V sup-
plies. For single-supply operation, bypass the power
supply with a 0.1µF ceramic capacitor. For dual-supply
operation, bypass each supply to ground. Good layout
improves performance by decreasing the amount of
stray capacitance at the op amps’ inputs and outputs.
Decrease stray capacitance by placing external com-
ponents close to the op amps’ pins, minimizing trace
and lead lengths.
TOP
MARK
PIN-
PART
TEMP RANGE
PACKAGE
MAX4232AKA+T
MAX4232AUA+T
MAX4233AUB+T
MAX4233ABC+T
MAX4234AUD
-40°C to +125°C 8 SOT23
-40°C to +125°C 8 µMAX
-40°C to +125°C 10 µMAX
-40°C to +125°C 10 UCSP
-40°C to +125°C 14 TSSOP
-40°C to +125°C 14 TSSOP
-40°C to +125°C 14 SO
AAKW
—
—
ABF
—
MAX4234AUD/V+
MAX4234ASD
+YWD
—
Chip Information
+Denotes a lead-free(Pb)/RoHS-compliant package.
T = Tape and reel.
MAX4230 TRANSISTOR COUNT: 230
MAX4231 TRANSISTOR COUNT: 230
MAX4232 TRANSISTOR COUNT: 462
MAX4233 TRANSISTOR COUNT: 462
MAX4234 TRANSISTOR COUNT: 924
*EP = Exposed pad.
______________________________________________________________________________________ 13
High-Output-Drive, 10MHz, 10V/µs,
Rail-to-Rail I/O Op Amps with Shutdown in SC70
Package Information
For the latest package outline information and land patterns, go to www.maxim-ic.com/packages.
PACKAGE TYPE
5 SC70
PACKAGE CODE
X5-1
DOCUMENT NO.
21-0076
21-0077
21-0057
21-0058
21-0036
21-0078
21-0228
21-0104
21-0190
21-0066
21-0041
6 SC70
X6SN-1
U5-1
5 SOT23
6 SOT23
8 µMAX
U6SN-1
U8-1
8 SOT23
6 UCSP
K8-5
R61A1+1
B12-4
10 UCSP
6 Thin µDFN
14 TSSOP
14 SO
Y61A1-1
U14-1
S14-1
0–MAX234
PACKAGE OUTLINE, 5L SC70
1
21-0076
E
1
14 ______________________________________________________________________________________
High-Output-Drive, 10MHz, 10V/µs,
Rail-to-Rail I/O Op Amps with Shutdown in SC70
0–MAX234
Package Information (continued)
For the latest package outline information and land patterns, go to www.maxim-ic.com/packages.
______________________________________________________________________________________ 15
High-Output-Drive, 10MHz, 10V/µs,
Rail-to-Rail I/O Op Amps with Shutdown in SC70
Package Information (continued)
For the latest package outline information and land patterns, go to www.maxim-ic.com/packages.
0–MAX234
16 ______________________________________________________________________________________
High-Output-Drive, 10MHz, 10V/µs,
Rail-to-Rail I/O Op Amps with Shutdown in SC70
0–MAX234
Package Information (continued)
For the latest package outline information and land patterns, go to www.maxim-ic.com/packages.
______________________________________________________________________________________ 17
High-Output-Drive, 10MHz, 10V/µs,
Rail-to-Rail I/O Op Amps with Shutdown in SC70
Package Information (continued)
For the latest package outline information and land patterns, go to www.maxim-ic.com/packages.
0–MAX234
18 ______________________________________________________________________________________
High-Output-Drive, 10MHz, 10V/µs,
Rail-to-Rail I/O Op Amps with Shutdown in SC70
0–MAX234
Package Information (continued)
For the latest package outline information and land patterns, go to www.maxim-ic.com/packages.
α
α
______________________________________________________________________________________ 19
High-Output-Drive, 10MHz, 10V/µs,
Rail-to-Rail I/O Op Amps with Shutdown in SC70
Package Information (continued)
For the latest package outline information and land patterns, go to www.maxim-ic.com/packages.
MARKING
0
0–MAX234
0
PACKAGE OUTLINE, SOT-23, 8L BODY
1
1
21-0078
I
20 ______________________________________________________________________________________
High-Output-Drive, 10MHz, 10V/µs,
Rail-to-Rail I/O Op Amps with Shutdown in SC70
0–MAX234
Package Information (continued)
For the latest package outline information and land patterns, go to www.maxim-ic.com/packages.
PACKAGE OUTLINE, 4x3 UCSP
1
21-0104
F
1
______________________________________________________________________________________ 21
High-Output-Drive, 10MHz, 10V/µs,
Rail-to-Rail I/O Op Amps with Shutdown in SC70
Package Information (continued)
For the latest package outline information and land patterns, go to www.maxim-ic.com/packages.
0–MAX234
22 ______________________________________________________________________________________
High-Output-Drive, 10MHz, 10V/µs,
Rail-to-Rail I/O Op Amps with Shutdown in SC70
0–MAX234
Package Information (continued)
For the latest package outline information and land patterns, go to www.maxim-ic.com/packages.
______________________________________________________________________________________ 23
High-Output-Drive, 10MHz, 10V/µs,
Rail-to-Rail I/O Op Amps with Shutdown in SC70
Package Information (continued)
For the latest package outline information and land patterns, go to www.maxim-ic.com/packages.
TABLE 1
TABLE 2
0–MAX234
24 ______________________________________________________________________________________
High-Output-Drive, 10MHz, 10V/µs,
Rail-to-Rail I/O Op Amps with Shutdown in SC70
0–MAX234
Package Information (continued)
For the latest package outline information and land patterns, go to www.maxim-ic.com/packages.
______________________________________________________________________________________ 25
High-Output-Drive, 10MHz, 10V/µs,
Rail-to-Rail I/O Op Amps with Shutdown in SC70
Package Information (continued)
For the latest package outline information and land patterns, go to www.maxim-ic.com/packages.
INCHES
MIN
MILLIMETERS
DIM
A
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
0–MAX234
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
26 ______________________________________________________________________________________
High-Output-Drive, 10MHz, 10V/µs,
Rail-to-Rail I/O Op Amps with Shutdown in SC70
0–MAX234
Revision History
REVISION
NUMBER
REVISION
DATE
PAGES
CHANGED
DESCRIPTION
7
7/08
Added 6-pin µDFN package for the MAX4231
1, 2, 8, 13
Corrected top mark for MAX4321, 6 SOT23 package; changed MAX4320 and
4321 to lead-free packages
8
10/08
1
9
10/08
12/08
Added shutdown pin limits
3, 4
13
10
Added automotive part number
Corrected top mark designation and pin configuration, and added UCSP
package
11
9/09
1, 2, 8, 13
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 ____________________ 27
© 2009 Maxim Integrated Products
Maxim is a registered trademark of Maxim Integrated Products, Inc.
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