EL5392ACU-T13 [INTERSIL]
Triple 600MHz Current Feedback Amplifier with Enable; 三重600MHz的电流反馈放大器启用
| 型号： | EL5392ACU-T13 |
| 厂家： | 
Intersil |
| 描述： | Triple 600MHz Current Feedback Amplifier with Enable |
| 文件： | 总14页 (文件大小：579K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
EL5392A
®
ata Sheet
January 22, 2004
FN7194
Triple 600MHz Current Feedback Amplifier
with Enable
Features
• 600MHz -3dB bandwidth
The EL5392A is a triple current
feedback amplifier with a very high
bandwidth of 600MHz. This makes this
amplifier ideal for today’s high speed video and monitor
applications.
• 6mA supply current (per amplifier)
• Single and dual supply operation, from 5V to 10V
• Fast enable/disable
• Available in 16-pin QSOP package
With a supply current of just 6mA per amplifier and the ability
to run from a single supply voltage from 5V to 10V, the
EL5392A is also ideal for hand held, portable or battery
powered equipment.
• Single (EL5192) and dual (EL5292) available
• High speed, 1GHz product available (EL5191)
• Low power, 4mA, 300MHz product available (EL5193,
EL5293, and EL5393)
The EL5392A 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.
Applications
• Video amplifiers
• Cable drivers
For applications where board space is critical, the EL5392A
is offered in the 16-pin QSOP package, as well as an
industry-standard 16-pin SO (0.150"). The EL5392A
operates over the industrial temperature range of -40°C to
+85°C.
• RGB amplifiers
• Test equipment
• Instrumentation
• Current to voltage converters
Pinout
EL5392
[16-PIN SO (0.150") & QSOP]
TOP VIEW
Ordering Information
TAPE &
REEL
INA+
CEA
VS-
1
2
3
4
5
6
7
8
16 INA-
15 OUTA
14 VS+
13 OUTB
12 INB-
11 NC
PART NUMBER
EL5392ACS
PACKAGE
16-Pin SO (0.150")
16-Pin SO (0.150")
16-Pin SO (0.150")
16-Pin QSOP
PKG. NO.
MDP0027
MDP0027
MDP0027
MDP0040
MDP0040
-
-
+
EL5392ACS-T7
EL5392ACS-T13
EL5392ACU
7”
+
-
13”
-
CEB
INB+
NC
EL5392ACU-T13
16-Pin QSOP
13”
+
-
CEC
INC+
10 OUTC
9
INC-
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 321-724-7143 | Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright © Intersil Americas Inc. 2004. All Rights Reserved. Elantec is a registered trademark of Elantec Semiconductor, Inc.
All other trademarks mentioned are the property of their respective owners.
1
EL5392A
Absolute Maximum Ratings (T = 25°C)
A
Supply Voltage between V + and V -. . . . . . . . . . . . . . . . . . . . .11V
Pin Voltages. . . . . . . . . . . . . . . . . . . . . . . . .V - - 0.5V to V + +0.5V
S S
S
S
Maximum Continuous Output Current . . . . . . . . . . . . . . . . . . . 50mA
Operating Junction Temperature . . . . . . . . . . . . . . . . . . . . . . .125°C
Power Dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . See Curves
Storage Temperature . . . . . . . . . . . . . . . . . . . . . . . .-65°C to +150°C
Operating Temperature . . . . . . . . . . . . . . . . . . . . . . .-40°C to +85°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, T = 25°C unless otherwise
S
S
F
V
F
V
L
A
specified.
PARAMETER
DESCRIPTION
CONDITIONS
MIN
TYP
MAX
UNIT
AC PERFORMANCE
BW
-3dB Bandwidth
A
A
= +1
= +2
600
300
25
MHz
MHz
MHz
V/µs
ns
V
V
BW1
SR
0.1dB Bandwidth
Slew Rate
V
V
= -2.5V to +2.5V, A = +2
2000
2300
9
O
V
t
0.1% Settling Time
Channel Separation
Input Voltage Noise
IN- Input Current Noise
IN+ Input Current Noise
= -2.5V to +2.5V, A = -1
OUT V
S
C
f = 5MHz
60
dB
S
N
e
4.1
nV/√Hz
pA/√Hz
pA/√Hz
%
i -
20
N
i +
N
50
dG
dP
Differential Gain Error (Note 1)
Differential Phase Error (Note 1)
A
A
= +2
= +2
0.015
0.04
V
V
°
DC PERFORMANCE
V
Offset Voltage
-10
1
5
10
mV
OS
T V
Input Offset Voltage Temperature
Coefficient
Measured from T to T
MIN MAX
µV/°C
C
OS
R
Transimpediance
200
400
kΩ
OL
INPUT CHARACTERISTICS
CMIR
Common Mode Input Range
±3
42
±3.3
50
3
V
CMRR
Common Mode Rejection Ratio
+ Input Current
dB
µA
µA
kΩ
pF
+I
-60
-40
60
40
IN
-I
IN
- Input Current
4
R
C
Input Resistance
37
0.5
IN
IN
Input Capacitance
OUTPUT CHARACTERISTICS
V
Output Voltage Swing
Output Current
R = 150Ω to GND
±3.4
±3.8
95
±3.7
±4.0
120
V
V
O
L
R = 1kΩ to GND
L
I
R = 10Ω to GND
mA
OUT
L
SUPPLY
I
I
Supply Current - Enabled
Supply Current - Disabled
No load, V = 0V
IN
5
6
7.5
mA
µA
SON
No load, V = 0V
IN
100
150
SOFF
2
EL5392A
Electrical Specifications V + = +5V, V - = -5V, R = 750Ω for A = 1, R = 375Ω for A = 2, R = 150Ω, T = 25°C unless otherwise
S
S
F
V
F
V
L
A
specified. (Continued)
PARAMETER
PSRR
DESCRIPTION
CONDITIONS
MIN
55
TYP
MAX
UNIT
dB
Power Supply Rejection Ratio
DC, V = ±4.75V to ±5.25V
75
S
-IPSR
- Input Current Power Supply Rejection
DC, V = ±4.75V to ±5.25V
-2
2
µA/V
S
ENABLE
t
t
I
I
Enable Time
40
600
0.8
0
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 +
6
IHCE
ILCE
S
CE = V -
-0.1
S
V
V + - 1
S
IHCE
ILCE
V
V + - 3
V
S
NOTE:
1. Standard NTSC test, AC signal amplitude = 286mV
, f = 3.58MHz
P-P
3
EL5392A
Typical Performance Curves
Non-Inverting Frequency Response (Gain)
Non-Inverting Frequency Response (Phase)
6
2
90
0
A =1
A =2
V
V
A =1
V
A =2
V
-2
-90
A =5
V
A =5
V
A =10
V
-6
-180
-270
-360
A =10
V
-10
-14
R =750Ω
R =750Ω
F
L
F
R =150Ω
R =150Ω
L
1M
10M
100M
Frequency (Hz)
1G
1M
10M
100M
Frequency (Hz)
1G
Inverting Frequency Response (Gain)
Inverting Frequency Response (Phase)
6
2
90
0
A =-1
A =-2
V
V
A =-1
V
-2
-90
A =-2
V
A =-5
V
A =-5
V
-6
-180
-270
-360
-10
-14
R =375Ω
R =375Ω
F
L
F
R =150Ω
R =150Ω
L
1M
10M
100M
Frequency (Hz)
1G
1M
10M
100M
Frequency (Hz)
1G
Frequency Response for Various C
-
Frequency Response for Various R
L
IN
10
6
6
2
R =150Ω
R =100Ω
L
L
2pF added
1pF added
R =500Ω
L
2
-2
-2
-6
-10
-6
0pF added
-10
-14
A
=2
V
R =375Ω
A
=2
F
V
R =150Ω
R =375Ω
L
F
1M
10M
100M
1G
1M
10M
100M
1G
Frequency (Hz)
Frequency (Hz)
4
EL5392A
Typical Performance Curves (Continued)
Frequency Response for Various C
Frequency Response for Various R
L
F
14
10
6
6
2
A
=2
V
250Ω
375Ω
R =375Ω
F
R =150Ω
L
12pF added
475Ω
-2
8pF added
620Ω
2
-6
750Ω
0pF added
100M
-2
-10
A
R
=2
V
=R
G
F
R =150Ω
L
-6
1M
-14
1M
10M
1G
10M
100M
1G
Frequency (Hz)
Frequency (Hz)
Group Delay vs Frequency
Frequency Response for Various Common-Mode Input
Voltages
3.5
3
6
2
V
=3V
V
=0V
CM
CM
2.5
2
A =2
V
R =375Ω
F
-2
V
=-3V
CM
1.5
1
-6
A =1
V
-10
-14
A
=2
V
R =750Ω
F
0.5
0
R =375Ω
F
R =150Ω
L
1M
10M
100M
1G
1M
10M
100M
1G
Frequency (Hz)
Frequency (Hz)
Transimpedance (ROL) vs Frequency
PSRR and CMRR vs Frequency
10M
1M
20
0
0
Phase
PSRR+
-90
100k
10k
1k
-20
-40
-60
-80
PSRR-
-180
-270
-360
Gain
CMRR
100
1k
10k
100k
1M
10M
100M
1G
10k
100k
1M
10M
100M
1G
Frequency (Hz)
Frequency (Hz)
5
EL5392A
Typical Performance Curves (Continued)
-3dB Bandwidth vs Supply Voltage for Non-Inverting
-3dB Bandwidth vs Supply Voltage for Inverting Gains
Gains
800
350
300
250
200
150
100
50
R =750Ω
F
R =150Ω
L
A =-1
V
600
400
200
0
A =1
V
A =-2
V
A =-5
V
A =2
V
A =5
V
A =10
V
R =375Ω
F
R =150Ω
L
0
5
6
7
8
9
10
5
6
7
8
9
10
Total Supply Voltage (V)
Total Supply Voltage (V)
Peaking vs Supply Voltage for Non-Inverting Gains
Peaking vs Supply Voltage for Inverting Gains
4
3
2
1
0
4
3
2
1
0
R =750Ω
R =375Ω
F
F
R =150Ω
R =150Ω
A =-1
L
L
V
A =1
V
A =-2
V
A =2
V
A =10
V
A =-5
V
5
6
7
8
9
10
5
6
7
8
9
10
Total Supply Voltage (V)
Total Supply Voltage (V)
-3dB Bandwidth vs Temperature for Non-Inverting
Gains
-3dB Bandwidth vs Temperature for Inverting Gains
1400
1200
1000
800
600
400
200
0
500
400
300
200
100
0
R =750Ω
R =375Ω
F
L
F
R =150Ω
R =150Ω
L
A =1
V
A =-1
V
A =-2
V
A =-5
V
A =5
V
A =10
V
A =2
V
-40
10
60
110
160
-40
10
60
110
160
Ambient Temperature (°C)
Ambient Temperature (°C)
6
EL5392A
Typical Performance Curves (Continued)
Peaking vs Temperature
2
Voltage and Current Noise vs Frequency
1k
100
10
R =150Ω
L
1.5
1
A =1
V
i +
n
i -
A =-1
V
n
0.5
0
A =-2
V
e
n
A =2
V
-0.5
1
-50
-50
0
50
100
100
1k
10k
100k
1M
10M
Frequency (Hz)
Ambient Temperature (°C)
Closed Loop Output Impedance vs Frequency
Supply Current vs Supply Voltage
100
10
10
8
1
6
0.1
4
0.01
0.001
2
0
100
1k
10k
100k
1M
10M 100M
1G
0
2
4
6
8
10
12
Frequency (Hz)
Supply Voltage (V)
2nd and 3rd Harmonic Distortion vs Frequency
Two-Tone 3rd Order
Input Referred Intermodulation Intercept (IIP3)
-20
-30
-40
-50
-60
-70
-80
-90
-100
30
25
20
15
10
5
A
=+2
=2V
A =+2
V
L
V
V
R =150Ω
OUT
P-P
R =100Ω
L
2nd Order
Distortion
3rd Order
Distortion
0
-5
A
=+2
-10
V
R =100Ω
L
-15
1
10
Frequency (MHz)
100
10
100
200
Frequency (MHz)
7
EL5392A
Typical Performance Curves (Continued)
Differential Gain/Phase vs DC Input
Voltage at 3.58MHz
0.03
Differential Gain/Phase vs DC Input
Voltage at 3.58MHz
0.03
0.02
0.01
0
A
=2
A =1
V
V
R =R =375Ω
R =750Ω
0.02
0.01
0
dP
dG
F
G
F
R =150Ω
R =500Ω
dP
dG
L
L
-0.01
-0.02
-0.03
-0.04
-0.05
-0.06
-0.01
-0.02
-0.03
-0.04
-0.05
-1
-0.5
0
0.5
1
-1
-0.5
0
0.5
1
DC Input Voltage
DC Input Voltage
Output Voltage Swing vs Frequency
THD<1%
Output Voltage Swing vs Frequency
THD<0.1%
9
8
7
6
5
4
3
2
1
0
10
8
R =500Ω
R =500Ω
L
L
R =150Ω
R =150Ω
L
L
6
4
2
A
=2
A
=2
V
V
0
1
10
Frequency (MHz)
100
1
10
100
Frequency (MHz)
Small Signal Step Response
Large Signal Step Response
V
=±5V
V =±5V
S
S
L
R =150Ω
A
R =R =375Ω
R =150Ω
L
=2
A =2
V
V
R =R =375Ω
F
G
F G
200mV/div
1V/div
10ns/div
10ns/div
8
EL5392A
Typical Performance Curves (Continued)
Settling Time vs Settling Accuracy
25
Transimpedance (RoI) vs Temperature
500
450
400
350
300
A
=2
V
R =R =375Ω
F
G
R =150Ω
L
20
15
10
5
V
=5V
output
P-P
STEP
0
0.01
0.1
Settling Accuracy (%)
1
-40
10
60
110
160
160
160
Die Temperature (°C)
PSRR and CMRR vs Temperature
PSRR
ICMR and IPSR vs Temperature
90
80
70
60
50
40
30
20
10
2.5
2
ICMR+
1.5
1
CMRR
IPSR
0.5
0
ICMR-
-0.5
-1
-40
-40
10
60
110
160
10
60
110
Die Temperature (°C)
Die Temperature (°C)
Offset Voltage vs Temperature
Input Current vs Temperature
3
2
60
40
20
IB-
IB+
110
1
0
-20
-40
-60
-80
0
-1
-2
-40
10
60
110
160
-40
10
60
Die Temperature (°C)
Temperature (°C)
9
EL5392A
Typical Performance Curves (Continued)
Positive Input Resistance vs Temperature
Supply Current vs Temperature
50
45
40
35
30
25
20
15
10
5
8
7
6
5
4
3
2
1
0
0
-40
10
60
110
160
-40
10
60
110
160
160
160
Temperature (°C)
Temperature (°C)
Positive Output Swing vs Temperature for Various
Loads
Negative Output Swing vs Temperature for Various
Loads
4.2
4.1
4
-3.5
-3.6
-3.7
-3.8
-3.9
-4
150Ω
1kΩ
3.9
3.8
3.7
3.6
3.5
1kΩ
150Ω
-4.1
-4.2
-40
-40
10
50
110
160
10
60
110
Temperature (°C)
Temperature (°C)
Output Current vs Temperature
Slew Rate vs Temperature
135
130
125
120
115
4600
4400
4200
4000
3800
3600
3400
3200
3000
A
=2
V
R =R =375Ω
F
G
R =150Ω
L
Sink
Source
-40
10
60
110
160
-40
10
60
Die Temperature (°C)
110
Die Temperature (°C)
10
EL5392A
Typical Performance Curves (Continued)
Package Power Dissipation vs Ambient Temperature
JEDEC JESD51-3 Low Effective Thermal Conductivity Test
Board
Channel-to-Channel Isolation vs Frequency
0
1
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
909mW
633mW
-20
-40
-60
-80
-100
100k
1M
10M
100M 400M
0
25
50
75 85 100
125
150
Frequency (Hz)
Ambient Temperature (°C)
Enable Response
Disable Response
500mV/div
5V/div
500mV/div
5V/div
20ns/div
400ns/div
11
EL5392A
Pin Descriptions
16-PIN SO
(0.150")
16-PIN
QSOP
PIN NAME
FUNCTION
Non-inverting input, channel A
EQUIVALENT CIRCUIT
1
1
INA+
V
+
S
IN+
IN-
V
-
S
Circuit 1
2
2
CEA
Chip enable, channel A
V
+
S
CE
V
-
S
Circuit 2
3
4
3
4
VS-
CEB
INB+
NC
Negative supply
Chip enable, channel B
Non-inverting input, channel B
Not connected
(See circuit 2)
(See circuit 1)
5
5
6, 11
7
6, 11
7
CEC
INC+
INC-
OUTC
Chip enable, channel C
Non-inverting input, channel C
Inverting input, channel C
Output, channel C
(See circuit 2)
(See circuit 1)
(See circuit 1)
8
8
9
9
10
10
V
+
S
OUT
V
-
S
Circuit 3
12
13
14
15
16
12
13
14
15
16
INB-
OUTB
VS+
Inverting input, channel B
Output, channel B
(See circuit 1)
(See circuit 3)
Positive supply
OUTA
INA-
Output, channel A
(See circuit 3)
(See circuit 1)
Inverting input, channel A
relatively constant as closed-loop gain is increased. This
combination of high bandwidth and low power, together with
aggressive pricing make the EL5392A the ideal choice for
many low-power/high-bandwidth applications such as
portable, handheld, or battery-powered equipment.
Applications Information
Product Description
The EL5392A is a current-feedback operational amplifier
that offers a wide -3dB bandwidth of 600MHz and a low
supply current of 6mA per amplifier. The EL5392A works
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 EL5392A does not have the normal gain-
bandwidth product associated with voltage-feedback
operational amplifiers. Instead, its -3dB bandwidth to remain
For varying bandwidth needs, consider the EL5191 with
1GHz on a 9mA supply current or the EL5193 with 300MHz
on a 4mA supply current. Versions include single, dual, and
triple amp packages with 5-pin SOT23, 16-pin QSOP, and 8-
pin or 16-pin SO (0.150") outlines.
12
EL5392A
not recommended around the inverting input pin of the
amplifier.
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.
Feedback Resistor Values
The EL5392A has been designed and specified at a gain of
+2 with R approximately 375Ω. This value of feedback
F
resistor gives 300MHz of -3dB bandwidth at A =2 with 2dB
V
of peaking. With A =-2, an R of 375Ω gives 275MHz of
V
F
bandwidth with 1dB of peaking. Since the EL5392A is a
current-feedback amplifier, it is also possible to change the
value of R to get more bandwidth. As seen in the curve of
F
Frequency Response for Various R and R , bandwidth and
F
G
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
acceptable with the Metal-Film resistors giving slightly less
peaking and bandwidth because of additional series
inductance. Use of sockets, particularly for the SO (0.150")
package, should be avoided if possible. Sockets add
parasitic inductance and capacitance which will result in
additional peaking and overshoot.
peaking can be easily modified by varying the value of the
feedback resistor.
Because the EL5392A is a current-feedback amplifier, its
gain-bandwidth product is not a constant for different closed-
loop gains. This feature actually allows the EL5392A 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 becomes possible to reduce the value
of R below the specified 375Ω and still retain stability,
F
resulting in only a slight loss of bandwidth with increased
closed-loop gain.
Disable/Power-Down
Supply Voltage Range and Single-Supply
Operation
The EL5392A amplifier can be disabled placing its output in
a high impedance state. When disabled, the amplifier supply
current is reduced to < 450µA. The EL5392A 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 EL5392A 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 EL5392A to be
enabled by tying CE to ground, even in 5V single supply
applications. The CE pin can be driven from CMOS outputs.
The EL5392A has been designed to operate with supply
voltages having a span of greater than 5V and less than 10V.
In practical terms, this means that the EL5392A will operate
on dual supplies ranging from ±2.5V to ±5V. With single-
supply, the EL5392A 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
EL5392A has an input range which extends to within 2V of
either supply. So, for example, on ±5V supplies, the
EL5392A has an input range which spans ±3V. The output
range of the EL5392A 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 6mA
supply current of each EL5392A amplifier. Special circuitry
has been incorporated in the EL5392A to reduce the
The EL5392A has been optimized with a 375Ω 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
13
EL5392A
variation of output impedance with current output. This
results in dG and dP specifications of 0.015% and 0.04°,
while driving 150Ω at a gain of 2.
modified for the EL5392A to remain in the safe operating
area. These parameters are calculated as follows:
T
= T
+ (θ × n × PD
JA
)
MAX
JMAX
MAX
Video performance has also been measured with a 500Ω
load at a gain of +1. Under these conditions, the EL5392A
has dG and dP specifications of 0.03% and 0.05°,
respectively.
where:
T
= Maximum ambient temperature
MAX
θ
= Thermal resistance of the package
Output Drive Capability
JA
n = Number of amplifiers in the package
PD = Maximum power dissipation of each amplifier in
In spite of its low 6mA of supply current, the EL5392A is
capable of providing a minimum of ±95mA of output current.
With a minimum of ±95mA of output drive, the EL5392A is
capable of driving 50Ω loads to both rails, making it an
excellent choice for driving isolation transformers in
telecommunications applications.
MAX
the package
PD for each amplifier can be calculated as follows:
MAX
V
Driving Cables and Capacitive Loads
OUTMAX
PD
= (2 × V × I
) + (V - V
) × ----------------------------
MAX
S
SMAX
S
OUTMAX
R
L
When used as a cable driver, double termination is always
recommended for reflection-free performance. For those
applications, the back-termination series resistor will
where:
decouple the EL5392A 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
V
= Supply voltage
S
I
= Maximum supply current of 1A
SMAX
V
= Maximum output voltage (required)
OUTMAX
most peaking. The gain resistor (R ) can then be chosen to
G
R = Load resistance
L
make up for any gain loss which may be created by this
additional resistor at the output. In many cases it is also
possible to simply increase the value of the feedback
resistor (R ) to reduce the peaking.
F
Current Limiting
The EL5392A has 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.
Power Dissipation
With the high output drive capability of the EL5392A, it is
possible to exceed the 125°C Absolute Maximum junction
temperature under certain very high load current conditions.
Generally speaking when R falls below about 25Ω, it is
L
important to calculate the maximum junction temperature
(T
) for the application to determine if power supply
JMAX
voltages, load conditions, or package type need to be
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.
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