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EL2099
January 1996, Rev. D
FN7041
Video Distribution Amplifier
Features
The EL2099 is a high speed,
monolithic operational amplifier*
featuring excellent video performance
and high output current capability. Built using Elantec's
Complementary Bipolar process, the EL2099 uses current
mode feedback to achieve wide bandwidth, and is stable in
unity gain configuration.
• 50MHz -3dB bandwidth, AV = +2
Operation from power supplies ranging from ±5V to ±15V
makes the EL2099 extremely versatile. With supplies at
±15V, the EL2099 can deliver ±11V into 25Ω at slew rates of
1000V/µs. At ±5V supplies, output voltage range is ±3V into
25Ω. Its speed and output current capability make this device
ideal for video line driver and automatic test equipment
applications.
• Slew rate = 1000V/µs
Differential Gain and Phase of the EL2099 are 0.03% and
0.05° respectively, and -3dB bandwidth is 50MHz. These
features make the EL2099 especially well suited for video
distribution applications.
Pinout
• Differential gain 0.03%
• Differential phase 0.05°
• Output short circuit current 800mA
• Can drive six 75Ω double terminated cables ±11V
• Wide supply voltage range ±5V to ±15V
Applications
• Video line driver
• ATE pin driver
• High speed data acquisition
Ordering Information
PART
NUMBER
EL2099CT
TEMP.
RANGE
PACKAGE
PKG. NO.
0°C to +75°C
5-Pin TO-220
MDP0028
EL2099
(5-PIN TO-220)
TOP VIEW
Manufactured under U.S. Patent Nos. 5,179,355, 4,893,091, U.K.
Patent No. 2261786.
1
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. 2003. All Rights Reserved. Elantec is a registered trademark of Elantec Semiconductor, Inc.
All other trademarks mentioned are the property of their respective owners.
EL2099
Absolute Maximum Ratings (TA = 25°C)
Voltage between VS+ and VS- . . . . . . . . . . . . . . . . . . . . . . . . . .+33V
Voltage at VS+ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +16.5V
Voltage at VS- . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -16.5V
Voltage between VIN+ and VIN- . . . . . . . . . . . . . . . . . . . . . . . . . .±6V
Current into VIN+ or VIN- . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±10mA
Internal Power Dissipation . . . . . . . . . . . . . . . . . . . . . . . See Curves
Operating Ambient Temperature Range . . . . . . . . . . . 0°C to +75°C
Operating Junction Temperature . . . . . . . . . . . . . . . . . . . . . . . 150°C
Storage Temperature Range . . . . . . . . . . . . . . . . . .-65°C to +150°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: TJ = TC = TA
Open-Loop DC Electrical Specifications
PARAMETER
VOS
VS = ±15V, RL = 25Ω, TA = 25°C unless otherwise specified
DESCRIPTION
Input Offset Voltage
TEMP
MIN
25°C
TYP
MAX
UNITS
5
20
mV
25
mV
TMIN, TMAX
TC VOS
Average Offset Voltage Drift
+IIN
+Input Current
Full
20
25°C
5
TMIN, TMAX
-IIN
-Input Current
25°C
8
TMIN, TMAX
µV/°C
20
µA
30
µA
35
µA
50
µA
CMRR
Common Mode Rejection Ratio (Note 1)
25°C
50
60
dB
PSRR
Power Supply Rejection Ratio (Note 2)
25°C
60
70
dB
ROL
Transimpedance
25°C
85
140
kΩ
+RIN
+Input Resistance (Note 3)
25°C
700
1000
kΩ
TMIN, TMAX
600
kΩ
+CIN
+Input Capacitance
25°C
3
pF
CMIR
Common Mode Input Range
25°C
±12.5
V
VO
Output Voltage Swing VS = ±15V
25°C
±9
±11
V
Output Voltage Swing VS = ±5V
25°C
±2.4
±3.0
V
IOUT
Output Current
25°C
360
440
mA
ISC
Output Short-Circuit Current
25°C
600
800
mA
TMIN, TMAX
800
mA
25°C
32
IS
Supply Current
NOTES:
1. The input is moved from -10V to +10V.
2. The supplies are moved from ±5V to ±15V.
3. VIN = ±5V. See typical performance curve for larger values of VIN.
2
45
mA
EL2099
Closed-Loop AC Electrical Specifications
PARAMETER
VS = ±15V, AV = +2, RF = 510Ω, RL = 25Ω, TA = 25°C unless otherwise specified
DESCRIPTION
MIN
TYP
MAX
UNITS
500
1000
V/µs
SR
Slew Rate (Note 1) (Note 2)
BW
-3dB Bandwidth (Note 2)
50
MHz
Peaking
(Note 2)
0.3
dB
tR, tF
Rise Time, Fall Time (Note 2) (Note 3)
7
ns
dG
Differential Gain; DC Input Offset from 0V through +0.714V, AC
Amplitude 286mVP-P, f = 3.58MHz (Note 4) (Note 2)
0.03
%
dP
Differential Phase; DC Input Offset from 0V through +0.714V, AC
Amplitude 286mVP-P, f = 3.58MHz (Note 2) (Note 4)
0.05
deg. (°)
NOTES:
1. Slew Rate is with VOUT from +5V to -5V and measured at 20% and 80%.
2. All AC tests are performed on a “warmed up” part, except for Slew Rate, which is pulse tested.
3. Rise and Fall Times are with VOUT between -0.5V and +0.5V and measured at 10% and 90%.
4. See typical performance curves for other conditions.
3
EL2099
Typical Performance Curves (TA = 25°C, RL = 25Ω, AV = +2, RF = 510 unless otherwise specified)
Non-Inverting
Frequency Response (GAIN)
Inverting Frequency
Response (GAIN)
Frequency Response for Various RL
4
Non-Inverting
Frequency Response (PHASE)
Inverting Frequency
Response (PHASE)
Frequency Response for Various CL
EL2099
Typical Performance Curves
(Continued)
Frequency Response for
Various RF & RG
Transimpedance (ROL)
PSRR & CMRR vs Frequency
Closed-Loop Output
Impedance vs Frequency
2nd and 3rd Harmonic
Distortion vs Frequency
5
Voltage and Current
Noise vs Frequency
EL2099
Typical Performance Curves
(Continued)
Supply Current vs
Die Temperature
Transimpedance (ROL) vs
Die Temperature
PSRR & CMRR vs
Die Temperature
6
Output Voltage vs
Die Temperature
Input Current vs
Die Temperature
Offset Voltage vs Die Temperature
(4 Samples)
EL2099
Typical Performance Curves
(Continued)
Differential Gain vs DC Input Voltage
for Various RLs
Supply Current vs Supply Voltage
+Input Resistance
vs Input Voltage
7
Differential Phase vs DC Input
Voltage for Various RLs
Slew Rate vs Supply Voltage
+Input Bias Current
vs Input Voltage
EL2099
Typical Performance Curves
(Continued)
-3dB Bandwidth vs RF
Overshoot vs RF
Peaking vs RF
5-Pin TO-220 Maximum
Power Dissipation vs
Ambient Temperature
Rise Time vs RF
Small Signal
Pulse Response
8
Large Signal
Pulse Response
EL2099
Simplified Schematic
Burn-In Circuit
smaller values will work under some circumstances. All tests
listed in this datasheet are performed with 50Ω in the +Input
pin, as well as all typical performance curves. The 50Ω
resistor along with the +Input bias current creates an
additional typical Offset Voltage of only 250µV at T = 25°C,
and a maximum of 1.25mV over temperature variations.
Feedback Resistor Values
Applications Information
Product Description
The EL2099 is a current mode feedback amplifier that has
high output current drive capability. It is built using Elantec’s
proprietary dielectric isolation process that produces NPN
and PNP complimentary transistors. The high output current
can be useful to drive many standard video loads in parallel,
as well as digital sync pulses that are 8V or greater.
+Input Resistor Value
A small value resistor located in the +Input pin is necessary
to keep the EL2099 from oscillating under certain conditions.
A 50Ω resistor is recommended for all applications, although
9
The EL2099 has been designed and specified with
RF = 510Ω and AV = +2. This value of feedback resistor
yields extremely flat frequency response with little to no
peaking. However, 3dB bandwidth is reduced somewhat
because of this. Wider bandwidth, at the expense of slight
peaking, can be accomplished by reducing the value of the
feedback resistor. For example, at a gain of +2, reducing the
feedback resistor to 330Ω increases the -3dB bandwidth to
70MHz with 3dB of peaking. Inversely, larger values of
feedback resistor will cause roll off to occur at a lower
frequency. There is essentially no peaking with RF > 510Ω.
Power Supplies
The EL2099 may be operated with single or split supplies as
low as ±5V (10V total) to as high as ±18V (36V total).
Bandwidth and slew rate are almost constant from
VS = ±10V to ±18V, and decrease slightly as supplies are
reduced to ±5V, as shown in the characteristic curves. It is
not necessary to use equal value split supplies. For example,
-5V and -12V would be fine for 0V to 1V video signals.
EL2099
Good power supply bypassing should be used to reduce the
risk of oscillation. A 1µF to 10µF tantalum capacitor in
parallel with a 0.1µF ceramic capacitor is recommended for
bypassing each supply pin. They should be kept as close as
possible to the device pins.
Due to the internal construction of the TO-220 package, the
tab of the EL2099 is connected to the VS- pin. Therefore,
care must be taken to avoid connecting the tab to the ground
plane of the system.
Printed Circuit Board Layout
The EL2099 was designed with driving multiple coaxial
cables in mind. With 440mA of output drive and low output
impedance, driving six, 75Ω double terminated coaxial
cables to ±11V with one EL2099 is practical.
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 EL2099 from the capacitive cable and allow
extensive capacitive drive. For a discussion on some of the
other ways to drive cables, see the application section on
driving cables in the EL2003 data sheet.
Other applications may have high capacitive loads without
termination resistors. In these applications, an additional
small value (5Ω-50Ω) resistor in series with the output will
eliminate most peaking.
The schematic below shows the EL2099 driving 6 double
terminated cables, each of average length of 50 feet.
This represents driving an effective load of 25Ω to over
±10V. The resulting performance is shown in the scope
photo. Notice that double termination results in reflection free
performance.
5V / div
As with any high frequency device, good printed circuit board
layout is necessary for optimum performance. Ground plane
construction is highly recommended. Pin lengths should be
as short as possible. For good AC performance, parasitic
capacitances should be kept to a minimum, especially at the
inverting input, which is sensitive to stray capacitance. This
implies keeping the ground plane away from this pin. Metal
film and carbon resistors are both acceptable, while use of
wire-wound resistors is not recommended because of their
parasitic inductance. Similarly, capacitors should be low
inductance for best performance.
Driving Cables and Capacitive Loads
20ns/div
10
EL2099
EL2099 Macromodel
* Connections:
+input
*
|
-input
*
|
|
+Vsupply
*
|
|
|
-Vsupply
*
|
|
|
|
output
*
|
|
|
|
|
.subckt M2099 4 5 1 3 2
*
* Input Stage
*
e1 10 0 4 0 1.0
vis 10 9 0V
h2 9 12 vxx 1.0
r1 5 11 50
l1 11 12 48nH
iinp 4 0 5µA
iinm 5 0 -8µA
*
* Slew Rate Limiting
*
h1 13 0 vis 600
r2 13 14 1K
d1 14 0 dclamp
d2 0 14 dclamp
*
* High Frequency Pole
*
*e2 30 0 14 0 0.001667
13 30 17 1.5µH
c5 17 0 1pF
r5 17 0 500
*
* Transimpedance Stage
*
g1 0 18 17 0 1.0
ro1 18 0 150K
cdp 18 0 8pF
*
* Output Stage
*
q1 3 18 19 qp
q2 1 18 20 qn
q3 1 19 21 qn
q4 3 20 22 qp
r7 21 2 1
r8 22 2 1
ios1 1 19 5mA
ios2 20 3 5mA
*
* Supply Current
*
ips 1 3 19mA
*
* Error Terms
*
ivos 0 23 5mA
vxx 23 0 0V
e4 24 0 2 0 1.0
e5 25 0 1 0 1.0
11
EL2099
EL2099 Macromodel
(Continued)
e6 26 0 3 0 1.0
r9 24 23 3K
r10 25 23 1K
r11 26 23 1K
* Models
*
.model qn npn (is=5e-15 bf=200 tf=0.1nS)
.model qp pnp (is=5e-15 bf=200 tf=0.1nS)
.model dclamp d (is=1e-30 ibv=0.266 bv=5 n=4)
.ends
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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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