EL5164ISZ-T7 [INTERSIL]
600MHz Current Feedback Amplifiers with Enable; 600MHz的电流反馈放大器与启用
| 型号： | EL5164ISZ-T7 |
| 厂家： | 
Intersil |
| 描述： | 600MHz Current Feedback Amplifiers with Enable |
| 文件： | 总12页 (文件大小：411K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
EL5164, EL5165, EL5364
®
Data Sheet
June 22, 2004
FN7389.3
600MHz Current Feedback Amplifiers with
Enable
Features
• 600MHz -3dB bandwidth
• 4700V/µs slew rate
• 5mA supply current
The EL5164, EL5165, and EL5364 are
current feedback amplifiers with a very
high bandwidth of 600MHz. This
makes these amplifiers ideal for today’s high speed video
and monitor applications.
• Single and dual supply operation, from 5V to 12V supply
span
With a supply current of just 5mA and the ability to run from
a single supply voltage from 5V to 12V, the amplifiers are
also ideal for hand held, portable or battery-powered
equipment.
• Fast enable/disable (EL5164 & EL5364 only)
• Available in SOT-23 packages
• Dual (EL5264 & EL5265) and triple (EL5362 & EL5363)
also available
The EL5164 also incorporates an enable and disable
function to reduce the supply current to 100µA typical per
amplifier. Allowing the CE pin to float or applying a low logic
level will enable the amplifier.
• High speed, 1GHz product available (EL5166 & EL5167)
• 300MHz product available (EL5162 family)
• Pb-free available
The EL5165 is offered in the 5-pin SOT-23 package, EL5164
is available in the 6-pin SOT-23 and the industry-standard 8-
pin SO packages, and the EL5364 in a 16-pin SO and 16-pin
QSOP packages. All operate over the industrial temperature
range of -40°C to +85°C.
Applications
• Video amplifiers
• Cable drivers
• RGB amplifiers
Ordering Information
• Test equipment
PART
TAPE &
REEL
PKG.
NUMBER
EL5164IS
PACKAGE
8-Pin SO
DWG. #
• Instrumentation
• Current to voltage converters
-
7”
MDP0027
MDP0027
MDP0027
MDP0038
MDP0038
MDP0038
MDP0038
P5.049
EL5164IS-T7
EL5164IS-T13
EL5164IW-T7
EL5164IW-T7A
EL5165IW-T7
EL5165IW-T7A
EL5165IC-T7
EL5165IC-T7A
EL5364IS
8-Pin SO
8-Pin SO
13”
7” (3K pcs)
7” (250 pcs)
7” (3K pcs)
7” (250 pcs)
7” (3K pcs)
7” (250 pcs)
6-Pin SOT-23
6-Pin SOT-23
5-Pin SOT-23
5-Pin SOT-23
5-Pin SC-70
5-Pin SC-70
16-Pin SO (0.150”)
16-Pin SO (0.150”)
P5.049
-
7”
13”
-
7”
13”
-
MDP0027
MDP0027
MDP0027
MDP0040
MDP0040
MDP0040
MDP0040
EL5364IS-T7
EL5364IS-T13 16-Pin SO (0.150”)
EL5364IU
EL5364IU-T7
EL5364IU-T13
16-Pin QSOP
16-Pin QSOP
16-Pin QSOP
EL5364IUZ
(See Note)
16-Pin QSOP
(Pb-free)
EL5364IUZ-T7
(See Note)
EL5364IUZ-
T13 (See Note)
16-Pin QSOP
(Pb-free)
16-Pin QSOP
(Pb-free)
7”
MDP0040
MDP0040
13”
NOTE: Intersil Pb-free products employ special Pb-free material sets; molding
compounds/die attach materials and 100% matte tin plate termination finish,
which is compatible with both SnPb and Pb-free soldering operations. Intersil
Pb-free products are MSL classified at Pb-free peak reflow temperatures that
meet or exceed the Pb-free requirements of IPC/JEDEC J Std-020B.
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1
1-888-INTERSIL or 321-724-7143 | Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright © Intersil Americas Inc. 2002-2004. All Rights Reserved. Elantec is a registered trademark of Elantec Semiconductor, Inc.
All other trademarks mentioned are the property of their respective owners.
EL5164, EL5165, EL5364
Pinouts
EL5164
EL5364
(16-PIN SO, QSOP)
TOP VIEW
(8-PIN SO)
TOP VIEW
NC
IN-
1
2
3
4
8
7
6
5
CE
INA+
CEA
VS-
1
2
3
4
5
6
7
8
16 INA-
-
VS+
OUT
NC
15 OUTA
14 VS+
-
+
+
IN+
VS-
+
-
CEB
INB+
NC
13 OUTB
12 INB-
11 NC
EL5165
(5-PIN SOT-23, SC-70)
+
-
CEC
INC+
10 OUTC
TOP VIEW
9
INC-
OUT
VS-
IN+
1
2
3
5
4
VS+
IN-
EL5164
(6-PIN SOT-23)
TOP VIEW
+
-
OUT
VS-
IN+
1
2
3
6
5
4
VS+
CE
+
-
IN-
2
EL5164, EL5165, EL5364
Absolute Maximum Ratings (T = 25°C)
A
Supply Voltage between V + and V -. . . . . . . . . . . . . . . . . . . 13.2V
Power Dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . See Curves
Storage Temperature . . . . . . . . . . . . . . . . . . . . . . . .-65°C to +150°C
Ambient Operating Temperature . . . . . . . . . . . . . . . .-40°C to +85°C
S
S
Maximum Continuous Output Current . . . . . . . . . . . . . . . . . . . 50mA
Pin Voltages. . . . . . . . . . . . . . . . . . . . . . . . . V - -0.5V to V + +0.5V
S
S
Operating Junction Temperature . . . . . . . . . . . . . . . . . . . . . . .125°C
CAUTION: Stresses above those listed in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and operation of the
device at these or any other conditions above those indicated in the operational sections of this specification is not implied.
IMPORTANT NOTE: All parameters having Min/Max specifications are guaranteed. Typical values are for information purposes only. Unless otherwise noted, all tests
are at the specified temperature and are pulsed tests, therefore: T = T = T
A
J
C
Electrical Specifications V + = +5V, V - = -5V, R = 750Ω for A = 1, R = 375Ω for A = 2, R = 150Ω, V
= V + - 1V,
S
S
A
S
F
V
F
V
L
ENABLE
T
= 25°C unless otherwise specified.
PARAMETER
DESCRIPTION
CONDITIONS
MIN
TYP
MAX
UNIT
AC PERFORMANCE
BW
-3dB Bandwidth
A
= +1, R = 500Ω, R = 510Ω
600
450
50
MHz
MHz
MHz
V/µs
V
L
F
A
= +2, R = 150Ω, R = 412Ω
L F
V
BW1
SR
0.1dB Bandwidth
A = +2, R = 150Ω, R = 412Ω
V L F
Slew Rate
V
= -3V to +3V, A = +2, R = 100Ω
3500
3000
4700
7000
6000
OUT
(EL5164, EL5165)
V
L
V
= -3V to +3V, A = +2, R = 100Ω
4200
15
V/µs
ns
OUT
(EL5364)
V
L
t
0.1% Settling Time
V
R
= -2.5V to +2.5V, A = +2,
V
S
OUT
= R = 1kΩ
F
G
e
Input Voltage Noise
f = 1MHz
2.1
13
nV/√Hz
pA/√Hz
pA/√Hz
dBc
N
i -
IN- Input Current Noise
IN+ Input Current Noise
f = 1MHz
N
i +
N
f = 1MHz
13
HD2
HD3
dG
5MHz, 2.5V
5MHz, 2.5V
-81
-74
0.01
0.01
P-P
P-P
dBc
Differential Gain Error (Note 1)
Differential Phase Error (Note 1)
A
= +2
= +2
%
V
dP
A
°
V
DC PERFORMANCE
V
Offset Voltage
-5
1.5
6
+5
mV
OS
T V
Input Offset Voltage Temperature
Coefficient
Measured from T
MIN
to T
MAX
µV/°C
C
OS
R
Transimpedance
1.1
3
MΩ
OL
INPUT CHARACTERISTICS
CMIR
Common Mode Input Range
Guaranteed by CMRR test
= ±3V
±3
50
±3.3
62
0.1
2
V
dB
CMRR
-ICMR
Common Mode Rejection Ratio
- Input Current Common Mode Rejection
+ Input Current
V
75
+1
IN
-1
µA/V
µA
+I
-10
-10
300
+10
+10
1200
IN
-I
- Input Current
2
µA
IN
R
Input Resistance
+ Input
650
1
kΩ
IN
IN
C
Input Capacitance
pF
3
EL5164, EL5165, EL5364
Electrical Specifications V + = +5V, V - = -5V, R = 750Ω for A = 1, R = 375Ω for A = 2, R = 150Ω, V
= V + - 1V,
S
S
A
S
F
V
F
V
L
ENABLE
T
= 25°C unless otherwise specified. (Continued)
PARAMETER
DESCRIPTION
CONDITIONS
MIN
TYP
MAX
UNIT
OUTPUT CHARACTERISTICS
V
Output Voltage Swing
Output Current
R = 150Ω to GND
±3.6
±3.9
100
±3.8
±4.1
140
±4.0
±4.2
190
V
V
O
L
R = 1kΩ to GND
L
I
R =10Ω to GND
mA
OUT
L
SUPPLY
I
I
I
Supply Current - Enabled
No load, V = 0V
IN
3.2
0
3.5
4.2
+75
0
mA
µA
SON
Supply Current - Disabled, per Amplifier
SOFF+
SOFF-
Supply Current - Disabled, per Amplifier No load, V = 0V
IN
-75
65
-1
-14
79
µA
PSRR
-IPSR
Power Supply Rejection Ratio
DC, V = ±4.75V to ±5.25V
dB
S
- Input Current Power Supply Rejection DC, V = ±4.75V to ±5.25V
0.1
+1
µA/V
S
ENABLE (EL5164 ONLY)
t
t
I
I
Enable Time
200
800
10
ns
ns
µA
µA
V
EN
Disable Time
DIS
CE Pin Input High Current
CE Pin Input Low Current
CE Input High Voltage for Power-down
CE Input Low Voltage for Power-down
CE = V +
1
+25
+1
IHCE
ILCE
S
CE = (V +) -5V
-1
0
S
V
V
V + - 1
S
IHCE
ILCE
V + - 3
V
S
NOTE:
1. Standard NTSC test, AC signal amplitude = 286mV , f = 3.58MHz
P-P
4
EL5164, EL5165, EL5364
Typical Performance Curves
5
5
R =1.2K, C =5pF
F
L
V
, V = ±5V
= +2
V
, V = ±5V
= 2.5pF
= +5
CC EE
4
3
4
3
CC EE
R =1.2K, C =3.5pF
A
F
L
C
V
L
A
V
R =1.2K, C =2.5pF
F
L
R =220, R =55
F
G
2
2
R =1.2K, C =0.8pF
F
L
R =160, R =41
F
G
1
1
0
0
R =1.5K, C =0.8pF
F
L
-1
-2
-3
-4
-5
R =300, R =75
-1
-2
-3
-4
F
G
R =1.8K, C =0.8pF
F
L
R =360, R =87
F
G
R =2.2K, C =0.8pF
F
L
R =397, R =97
F
G
R =412, R =100
F
G
R =560, R =135
F
G
-5
100K
100K
1M
10M
FREQUENCY (Hz)
100M
1G
1M
10M
FREQUENCY (Hz)
100M
1G
FIGURE 1. FREQUENCY RESPONSE FOR VARIOUS
AND C
FIGURE 2. FREQUENCY RESPONSE FOR VARIOUS R
F
R
F
L
6
6
5
V
, V = ±5V
5
4
V
V
= +5V
= -5V
CC EE
CC
EE
C
A
= 2.5pF
= +1
L
4
R
= 412Ω
C
A
= 5pF
= +2
F
V
L
3
V
R
= 510Ω
3
F
R
= 562Ω
R
= 150Ω
F
L
2
2
1
R
= 681Ω
1
F
0
0
R
= 681Ω
= 866Ω
= 1.2kΩ
= 1.5kΩ
F
-1
-2
-3
-1
-2
-3
R
= 750Ω
= 909Ω
= 1201Ω
R
R
F
F
R
F
F
F
R
R
F
-4
100K
-4
100K
1M
10M
100M
1G
1M
10M
FREQUENCY (Hz)
100M
1G
FREQUENCY (Hz)
FIGURE 4. FREQUENCY RESPONSE FOR VARIOUS R
FIGURE 3. FREQUENCY RESPONSE FOR VARIOUS R
F
F
5
R
R
R
= 150Ω
= 422Ω
= 422Ω
4
3
L
F
G
2V/DIV
INPUT
2
1
0
-1
-2
-3
-4
-5
V
, V
6V
5V
CC EE=
1V/DIV
OUTPUT
V
, V = ±5 V
= +2
= 150Ω
4V
CC EE
A
V
3V
R
L
2.5V
100K
1M
10M
100M
1G
ns
FREQUENCY (Hz)
FIGURE 5. FREQUENCY RESPONSE FOR VARIOUS POWER
SUPPLY VOLTAGES
FIGURE 6. RISE TIME (ns)
5
EL5164, EL5165, EL5364
Typical Performance Curves (Continued)
0
0
-10
-20
V
V
= +5V
= -5V
V
V
= +5 V
= -5 V
= +1
CC
EE
CC
EE
-10
A
= +1
A
V
V
OUT
R
-20
-30
-40
-50
-60
-70
-80
V
= 2V
= 100Ω
P-P
L
-30
-40
-50
THD
V
EE
-60
V
SECOND HARMONIC
THIRD HARMONIC
CC
-70
-80
-90
0
10
20
30
40
50
60
10K
100K
10M
1G
1M
100M
FREQUENCY (MHz)
FREQUENCY (Hz)
FIGURE 8. DISTORTION vs FREQUENCY (A = +1)
V
FIGURE 7. PSRR
0
-10
-20
-30
-40
-50
V
V
= +5 V
= -5 V
= +2
CC
EE
V
V
= +5 V
= -5 V
= +2
CC
EE
10
1
A
V
A
V
OUT
R
V
= 2V
= 100Ω
,
P-P
L
0.1
THD
-60
-70
0.01
-80
THIRD HARMONIC
SECOND HARMONIC
10 20 30
FREQUENCY (MHz)
-90
-100
10K
100K
1M
100M
10M
0
40
50
60
FREQENCY (Hz)
FIGURE 10. OUTPUT IMPEDANCE
FIGURE 9. DISTORTION vs FREQUENCY (A = +2)
V
1M
V
, V = ±5V
CC EE
100K
10
1
V
, V =
±6V
CC EE
10K
1K
±5V
±4V
±3V
±2.5V
100
10
0
100
1K
10K
1M
100K
10K
100K
10M
FREQUENCY (Hz)
1G
1M
100M
FREQENCY (Hz)
FIGURE 12. VOLTAGE NOISE
FIGURE 11. R
FOR VARIOUS V , V
CC EE
OL
6
EL5164, EL5165, EL5364
Typical Performance Curves (Continued)
V
= +5V, V = -5V
EE
CC
= +2
V
V
= +5V
= -5V
CC
EE
A
V
R
= 150Ω
L
100
10
1
CH1
CH2
100
1K
10K
100K
FREQUENCY (Hz)
FIGURE 14. TURN ON DELAY
FIGURE 13. CURRENT NOISE
300
PHASE
200
100
0
0.002
0.001
0.00
MAGNITUDE
-0.001
-0.002
-0.003
-0.004
-0.005
-100
-200
-300
CH1
V
V
= +5V
= -5V
CC
EE
V
= +5V, V = -5V
EE
CC
CH2
A
= +2
A
= +2
V
V
TEST FREQUENCY, 3.58MHz
R
= 150Ω
L
1V
0
-1V
DC INPUT
FIGURE 15. TURN OFF DELAY
FIGURE 16. DIFFERENTIAL GAIN/PHASE vs DC INPUT
VOLTAGE AT 3.58MHz
-30
-30
V
V
= +5V
= -5V
V
V
= +5V
CC
EE
CC
-40
-50
-40
-50
= -5V
= 100Ω
= 860Ω
= 860Ω
= 5pF
EE
R
R
R
= 100Ω
= 422Ω
= 422Ω
R
R
R
C
L
F
G
L
F
G
L
C
-60
-60
C TO B
-70
-70
-80
-80
B
-90
-90
A
A TO C
100M
A TO B
-100
-110
-120
-130
-100
-110
-120
-130
10K
100K
1M
10M
1G
10K
100K
1M
10M
100M
1G
FREQUENCY (Hz)
FREQUENCY (Hz)
FIGURE 18. CHANNEL CROSSTALK BETWEEN CHANNELS
FIGURE 17. FREQUENCY RESPONSE FOR VARIOUS
CHANNELS
7
EL5164, EL5165, EL5364
Typical Performance Curves (Continued)
JEDEC JESD51-7 HIGH EFFECTIVE THERMAL
CONDUCTIVITY TEST BOARD
JEDEC JESD51-7 HIGH EFFECTIVE THERMAL
CONDUCTIVITY TEST BOARD
1.4
1.2
1
1.4
1.2
1
1.250W
SO16 (0.150”)
θ
=80°C/W
JA
909mW
435mW
QSOP16
893mW
0.8
0.6
0.4
0.2
0
0.8
0.6
0.4
0.2
0
θ
=112°C/W
JA
SO8
θ
=110°C/W
JA
SOT23-5/6
=230°C/W
θ
JA
0
25
50
75 85 100
125
150
0
25
50
75 85 100
125
150
AMBIENT TEMPERATURE (°C)
AMBIENT TEMPERATURE (°C)
FIGURE 19. PACKAGE POWER DISSIPATION vs AMBIENT
TEMPERATURE
FIGURE 20. PACKAGE POWER DISSIPATION vs AMBIENT
TEMPERATURE
JEDEC JESD51-3 LOW EFFECTIVE THERMAL
JEDEC JESD51-3 LOW EFFECTIVE THERMAL
CONDUCTIVITY TEST BOARD
1.2
CONDUCTIVITY TEST BOARD
1
SO16 (0.150”)
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
1.136W
1
θ
=110°C/W
JA
0.8
0.6
0.4
0.2
0
633mW
SO8
=160°C/W
625mW
391mW
θ
JA
QSOP16
=158°C/W
SOT23-5/6
=256°C/W
θ
JA
θ
JA
0
25
50
75 85 100
125
150
0
25
50
75 85 100
125
150
AMBIENT TEMPERATURE (°C)
AMBIENT TEMPERATURE (°C)
FIGURE 21. PACKAGE POWER DISSIPATION vs AMBIENT
TEMPERATURE
FIGURE 22. PACKAGE POWER DISSIPATION vs AMBIENT
TEMPERATURE
8
EL5164, EL5165, EL5364
Pin Descriptions
EL5164
EL5165
(5-PIN
EL5164
(6-PIN
(8-PIN SO)
SOT-23)
SOT-23)
PIN NAME
FUNCTION
Not connected
EQUIVALENT CIRCUIT
1, 5
2
NC
IN-
V +
4
4
Inverting input
S
IN+
IN-
V -
S
Circuit 1
3
4
6
3
2
1
3
2
1
IN+
VS-
Non-inverting input
Negative supply
Output
(See circuit 1)
V +
S
OUT
OUT
V -
S
Circuit 2
7
8
6
5
5
VS+
CE
Positive supply
Chip enable, allowing the pin to float
or applying a low logic level will
enable the amplifier.
V +
S
CE
V -
S
Circuit 3
Versions include single, dual, and triple amp packages with
5-pin SOT-23, 16-pin QSOP, and 8-pin or 16-pin SO
outlines.
Applications Information
Product Description
The EL5164, EL5165, and EL5364 are current-feedback
operational amplifiers that offers a wide -3dB bandwidth of
600MHz and a low supply current of 5mA per amplifier. The
EL5164, EL5165, and EL5364 work with supply voltages
ranging from a single 5V to 10V and they are also capable of
swinging to within 1V of either supply on the output. Because
of their current-feedback topology, the EL5164, EL5165, and
EL5364 do not have the normal gain-bandwidth product
associated with voltage-feedback operational amplifiers.
Instead, its -3dB bandwidth to remain relatively constant as
closed-loop gain is increased. This combination of high
bandwidth and low power, together with aggressive pricing
make the EL5164, EL5165, and EL5364 ideal choices for
many low-power/high-bandwidth applications such as
portable, handheld, or battery-powered equipment.
Power Supply Bypassing and Printed Circuit
Board Layout
As with any high frequency device, good printed circuit
board layout is necessary for optimum performance. Low
impedance ground plane construction is essential. Surface
mount components are recommended, but if leaded
components are used, lead lengths should be as short as
possible. The power supply pins must be well bypassed to
reduce the risk of oscillation. The combination of a 4.7µF
tantalum capacitor in parallel with a 0.01µF capacitor has
been shown to work well when placed at each supply pin.
For good AC performance, parasitic capacitance should be
kept to a minimum, especially at the inverting input. (See the
Capacitance at the Inverting Input section.) Even when
ground plane construction is used, it should be removed
from the area near the inverting input to minimize any stray
capacitance at that node. Carbon or Metal-Film resistors are
For varying bandwidth needs, consider the EL5166 and
EL5167 with 1GHz on a 8.5mA supply current or the EL5162
and EL5163 with 300MHz on a 8.5mA supply current.
9
EL5164, EL5165, EL5364
acceptable with the Metal-Film resistors giving slightly less
allows the EL5164, EL5165, and EL5364 to maintain about
the same -3dB bandwidth. As gain is increased, bandwidth
decreases slightly while stability increases. Since the loop
stability is improving with higher closed-loop gains, it
peaking and bandwidth because of additional series
inductance. Use of sockets, particularly for the SO package,
should be avoided if possible. Sockets add parasitic
inductance and capacitance which will result in additional
peaking and overshoot.
becomes possible to reduce the value of R below the
F
specified TBDΩ and still retain stability, resulting in only a
slight loss of bandwidth with increased closed-loop gain.
Disable/Power-Down
Supply Voltage Range and Single-Supply
Operation
The EL5164 amplifier can be disabled placing its output in a
high impedance state. When disabled, the amplifier supply
current is reduced to < 150µA. The EL5164 is disabled when
its CE pin is pulled up to within 1V of the positive supply.
Similarly, the amplifier is enabled by floating or pulling its CE
pin to at least 3V below the positive supply. For ±5V supply,
this means that an EL5164 amplifier will be enabled when
CE is 2V or less, and disabled when CE is above 4V.
Although the logic levels are not standard TTL, this choice of
logic voltages allows the EL5164 to be enabled by tying CE
to ground, even in 5V single supply applications. The CE pin
can be driven from CMOS outputs.
The EL5164, EL5165, and EL5364 have been designed to
operate with supply voltages having a span of greater than
5V and less than 10V. In practical terms, this means that
they will operate on dual supplies ranging from ±2.5V to ±5V.
With single-supply, the EL5164, EL5165, and EL5364 will
operate from 5V to 10V.
As supply voltages continue to decrease, it becomes
necessary to provide input and output voltage ranges that
can get as close as possible to the supply voltages. The
EL5164, EL5165, and EL5364 have an input range which
extends to within 2V of either supply. So, for example, on
±5V supplies, the EL5164, EL5165, and EL5364 have an
input range which spans ±3V. The output range of the
EL5164, EL5165, and EL5364 is also quite large, extending
to within 1V of the supply rail. On a ±5V supply, the output is
therefore capable of swinging from -4V to +4V. Single-supply
output range is larger because of the increased negative
swing due to the external pull-down resistor to ground.
Capacitance at the Inverting Input
Any manufacturer’s high-speed voltage- or current-feedback
amplifier can be affected by stray capacitance at the
inverting input. For inverting gains, this parasitic capacitance
has little effect because the inverting input is a virtual
ground, but for non-inverting gains, this capacitance (in
conjunction with the feedback and gain resistors) creates a
pole in the feedback path of the amplifier. This pole, if low
enough in frequency, has the same destabilizing effect as a
zero in the forward open-loop response. The use of large-
value feedback and gain resistors exacerbates the problem
by further lowering the pole frequency (increasing the
possibility of oscillation.)
Video Performance
For good video performance, an amplifier is required to
maintain the same output impedance and the same
frequency response as DC levels are changed at the output.
This is especially difficult when driving a standard video load
of 150Ω, because of the change in output current with DC
level. Previously, good differential gain could only be
achieved by running high idle currents through the output
transistors (to reduce variations in output impedance.)
These currents were typically comparable to the entire
5.5mA supply current of each EL5164, EL5165, and EL5364
amplifiers. Special circuitry has been incorporated in the
EL5164, EL5165, and EL5364 to reduce the variation of
output impedance with current output. This results in dG and
dP specifications of TBD% and TBD°, while driving 150Ω at
a gain of 2.
The EL5164, EL5165, and EL5364 have been optimized
with a TBDΩ feedback resistor. With the high bandwidth of
these amplifiers, these resistor values might cause stability
problems when combined with parasitic capacitance, thus
ground plane is not recommended around the inverting input
pin of the amplifier.
Feedback Resistor Values
The EL5164, EL5165, and EL5364 have been designed and
specified at a gain of +2 with R approximately 412Ω. This
F
value of feedback resistor gives 300MHz of -3dB bandwidth
at A = 2 with 2dB of peaking. With A = -2, an R of 300Ω
V
V
F
Video performance has also been measured with a 500Ω
load at a gain of +1. Under these conditions, the EL5164,
EL5165, and EL5364 have dG and dP specifications of
0.01% and 0.01°, respectively.
gives 275MHz of bandwidth with 1dB of peaking. Since the
EL5164, EL5165, and EL5364 are current-feedback
amplifiers, it is also possible to change the value of R to get
F
more bandwidth. As seen in the curve of Frequency
Response for Various R and R , bandwidth and peaking
F
G
Output Drive Capability
can be easily modified by varying the value of the feedback
resistor.
In spite of their low 5.5mA of supply current, the EL5164,
EL5165, and EL5364 are capable of providing a minimum of
±75mA of output current. With a minimum of ±75mA of
output drive, the EL5164, EL5165, and EL5364 are capable
of driving 50Ω loads to both rails, making it an excellent
Because the EL5164, EL5165, and EL5364 are current-
feedback amplifiers, their gain-bandwidth product is not a
constant for different closed-loop gains. This feature actually
10
EL5164, EL5165, EL5364
choice for driving isolation transformers in
telecommunications applications.
where:
• V = Supply voltage
S
Driving Cables and Capacitive Loads
• I
= Maximum supply current of 1A
SMAX
When used as a cable driver, double termination is always
recommended for reflection-free performance. For those
applications, the back-termination series resistor will
decouple the EL5164, EL5165, and EL5364 from the cable
and allow extensive capacitive drive. However, other
applications may have high capacitive loads without a back-
termination resistor. In these applications, a small series
resistor (usually between 5Ω and 50Ω) can be placed in
series with the output to eliminate most peaking. The gain
• V
OUTMAX
= Maximum output voltage (required)
• R = Load resistance
L
Typical Application Circuits
0.1µF
+5V
IN+
IN-
V +
S
OUT
resistor (R ) can then be chosen to make up for any gain
V -
S
G
0.1µF
loss which may be created by this additional resistor at the
output. In many cases it is also possible to simply increase
-5V
375Ω
5Ω
5Ω
the value of the feedback resistor (R ) to reduce the
F
peaking.
0.1µF
V
Current Limiting
OUT
+5V
IN+
The EL5164, EL5165, and EL5364 have no internal current-
limiting circuitry. If the output is shorted, it is possible to
exceed the Absolute Maximum Rating for output current or
power dissipation, potentially resulting in the destruction of
the device.
V +
S
OUT
IN-
-5V
V -
S
0.1µF
375Ω
375Ω
V
IN
Power Dissipation
With the high output drive capability of the EL5164, EL5165,
and EL5364, it is possible to exceed the 125°C Absolute
Maximum junction temperature under certain very high load
FIGURE 23. INVERTING 200mA OUTPUT CURRENT
DISTRIBUTION AMPLIFIER
current conditions. Generally speaking when R falls below
L
375Ω
375Ω
about 25Ω, it is important to calculate the maximum junction
temperature (T
) for the application to determine if
JMAX
0.1µF
+5V
IN+
power supply voltages, load conditions, or package type
need to be modified for the EL5164, EL5165, and EL5364 to
remain in the safe operating area. These parameters are
calculated as follows:
V +
S
OUT
IN-
-5V
V -
S
0.1µF
375Ω
375Ω
T
= T
+ (θ × n × PD
)
MAX
JMAX
MAX
JA
0.1µF
where:
• T
+5V
IN+
= Maximum ambient temperature
V +
S
MAX
V
IN
OUT
V
OUT
• θ = Thermal resistance of the package
IN-
-5V
JA
V -
S
0.1µF
• n = Number of amplifiers in the package
• PD
= Maximum power dissipation of each amplifier in
the package
MAX
FIGURE 24. FAST-SETTLING PRECISION AMPLIFIER
PD
for each amplifier can be calculated as follows:
MAX
V
OUTMAX
----------------------------
PD
= (2 × V × I
) + (V – V
) ×
MAX
S
SMAX
S
OUTMAX
R
L
11
EL5164, EL5165, EL5364
0.1µF
0.1µF
+5V
IN+
+5V
IN+
V +
V +
S
S
OUT
OUT
IN-
-5V
IN-
-5V
V -
V -
S
S
0.1µF
0.1µF
0.1µF
0.1µF
375Ω
162Ω
162Ω
375Ω
375Ω
V
V
+
OUT
1kΩ
1kΩ
0.1µF
+5V
IN+
240Ω
0.1µF
+5V
IN+
V +
S
OUT
V +
S
-
OUT
IN-
-5V
OUT
V
OUT
V -
S
IN-
0.1µF
V -
S
0.1µF
-5V
375Ω
375Ω
V
IN
375Ω
375Ω
RECEIVER
TRANSMITTER
FIGURE 25. DIFFERENTIAL LINE DRIVER/RECEIVER
All Intersil U.S. products are manufactured, assembled and tested utilizing ISO9000 quality systems.
Intersil Corporation’s quality certifications can be viewed at www.intersil.com/design/quality
Intersil products are sold by description only. Intersil Corporation reserves the right to make changes in circuit design, software and/or specifications at any time without
notice. Accordingly, the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by Intersil is believed to be accurate and
reliable. However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result
from its use. No license is granted by implication or otherwise under any patent or patent rights of Intersil or its subsidiaries.
For information regarding Intersil Corporation and its products, see www.intersil.com
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