1
FN7054
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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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.
EL2176, EL2276
70MHz/1mA Current Mode Feedback Amp
w/Disable
The EL2176/EL2276 are single/dual
current-feedback operational
amplifiers which achieve a -3dB
bandwidth of 70MHz at a gain of +1 while consuming only
1mA of supply current per amplifier. They will operate with
dual supplies ranging from 1.5V to 6V, or from single
supplies ranging from +3V to +12V. The EL2176/EL2276
also include a disable/power-down feature which reduces
current consumption to 0mA while placing the amplifier
output in a high impedance state. In spite of its low supply
current, the EL2276 can output 55mA while swinging to 4V
on 5V supplies. The EL2176 can output 100mA with similar
output swings. These attributes make the EL2176/EL2276
excellent choices for low power and/or low voltage cable-
driver, HDSL, or RGB applications.
For Single, Dual and Quad applications without disable,
consider the EL2170 (8-Pin Single), EL2270 (8-Pin Dual) or
EL2470 (14-Pin Quad). For higher bandwidth applications
where low power is still a concern, consider the
EL2180/EL2186 family which also comes in similar Single,
Dual and Quad configurations. The EL2180/EL2186 family
provides a -3dB bandwidth of 250MHz while consuming
3mA of supply current per amplifier.
Features
Single (EL2176) and dual (EL2276) topologies
1mA supply current (per amplifier)
70MHz -3dB bandwidth
Low cost
Fast disable
Powers down to 0mA
Single- and dual-supply operation down to 1.5V
0.15%/0.15 diff. gain/diff. phase into 150
800V/s slew rate
Large output drive current:
100mA (EL2176)
55mA (EL2276)
Also available without disable in single (EL2170), dual
(EL2270) and quad (EL2470)
Higher speed EL2180/EL2186 family also available (3mA/
250MHz) in single, dual and quad
Applications
Low power/battery applications
HDSL amplifiers
Video amplifiers
Cable drivers
RGB amplifiers
Test equipment amplifiers
Current to voltage converters
Ordering Information
PART NUMBER
TEMP. RANGE
PACKAGE
PKG. NO.
EL2176CN
-40C to +85C
8-Pin PDIP
MDP0031
EL2176CS
-40C to +85C
8-Pin SOIC
MDP0027
EL2276CN
-40C to +85C
14-Pin PDIP
MDP0031
EL2276CS
-40C to +85C
14-Pin SOIC
MDP0027
Pinouts
EL2176
(8-PIN SO, PDIP)
TOP VIEW
EL2276
(14-PIN SO, PDIP)
TOP VIEW
Manufactured under U.S. Patent No. 5,352,989, 5,351,012, 5,418,495
Data Sheet
December 1995, Rev. B
2
Absolute Maximum Ratings
(T
A
= 25C)
Voltage between V
S
+ and V
S
- . . . . . . . . . . . . . . . . . . . . . . . . +12.6V
Common-Mode Input Voltage . . . . . . . . . . . . . . . . . . . . . V
S
- to V
S
+
Differential Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6V
Current into +IN or -IN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7.5mA
Internal Power Dissipation . . . . . . . . . . . . . . . . . . . . . . . See Curves
Operating Ambient Temperature Range . . . . . . . . . . -40C to +85C
Operating Junction Temperature Plastic Packages . . . . . . . . . 150C
Output Current (EL2176) . . . . . . . . . . . . . . . . . . . . . . . . . . . 120mA
Output Current (EL2276) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60mA
Storage Temperature Range . . . . . . . . . . . . . . . . . . -65C to +150C
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
J
= T
C
= T
A
DC Electrical Specifications
V
S
= 5V, R
L
= 150
, ENABLE = 0V, T
A
= 25C unless otherwise specified.
PARAMETER
DESCRIPTION
CONDITIONS
MIN
TYP
MAX
UNITS
V
OS
Input Offset Voltage
2.5
15
mV
TCV
OS
Average Input Offset Voltage Drift
Measured from T
MIN
to T
MAX
5
V/C
dV
OS
V
OS
Matching
EL2276 only
0.5
mV
+I
IN
+ Input Current
0.5
5
A
d+I
IN
+I
IN
Matching
EL2276 only
20
nA
-I
IN
- Input Current
4
15
A
d-I
IN
-I
IN
Matching
EL2276 only
1.5
A
CMRR
Common Mode Rejection Ratio
V
CM
= 3.5 V
45
50
dB
-ICMR
- Input Current Common Mode Rejection
V
CM
= 3.5V
4
10
A/V
PSRR
Power Supply Rejection Ratio
V
S
is moved from 4V to 6V
60
70
dB
-IPSR
- Input Current Power Supply Rejection
V
S
is moved from 4V to 6V
0.5
5
A/V
R
OL
Transimpedance
V
OUT
= 2.5V
150
400
k
+R
IN
+ Input Resistance
V
CM
= 3.5V
1
4
M
+C
IN
+ Input Capacitance
1.2
pF
CMIR
Common Mode Input Range
3.5
4.0
V
V
O
Output Voltage Swing
V
S
= 5
3.5
4.0
V
V
S
= +5 Single-Supply, High
4.0
V
V
S
= +5 Single-Supply, Low
0.3
V
I
O
Output Current
EL2176 only
80
100
mA
EL2276 only, per Amplifier
50
55
mA
I
S
Supply Current
ENABLE = 2.0V, per Amplifier
1
2
mA
I
S(DIS)
Supply Current (Disabled)
ENABLE = 4.5V
0
20
A
C
OUT(DIS)
Output Capacitance (Disabled)
ENABLE = 4.5V
4.4
pF
R
EN
Enable Pin Input Resistance
Measured at ENABLE = 2.0V, 4.5V
45
85
k
I
IH
Logic "1" Input Current
Measured at ENABLE, ENABLE = 4.5V
-0.04
A
I
IL
Logic "0" Input Current
Measured at ENABLE, ENABLE = 0V
-53
A
V
DIS
Minimum Voltage at ENABLE to Disable
4.5
V
V
EN
Maximum Voltage at ENABLE to Enable
2.0
V
EL2176, EL2276
3
AC Electrical Specifications
V
S
= 5V, R
F
= R
G
= 1.0k
, R
L
= 150
, ENABLE = 0V, T
A
= 25C unless otherwise specified.
PARAMETER
DESCRIPTION
CONDITIONS
MIN
TYP
MAX
UNITS
-3dB BW
-3dB Bandwidth
A
V
= +1
70
MHz
-3dB BW
-3dB Bandwidth
A
V
= +2
60
MHz
SR
Slew Rate
V
OUT
= 2.5V, A
V
= +2
400
800
V/s
t
R
, t
F
Rise and Fall Time
V
OUT
= 500mV
4.5
ns
t
PD
Propagation Delay
V
OUT
= 50mV
4.5
ns
OS
Overshoot
V
OUT
= 500mV
3.0
%
ts
0.1% Settling
V
OUT
= 2.5V, A
V
= -1
40
ns
dG
Differential Gain
A
V
= +2, R
L
= 150
(Note 1)
0.15
%
dP
Differential Phase
A
V
= +2, R
L
= 150
(Note 1)
0.15
dG
Differential Gain
A
V
= +1, R
L
= 500
(Note 1)
0.02
%
dP
Differential Phase
A
V
= +1, R
L
= 500
(Note 1)
0.01
t
ON
Turn-On Time
A
V
= +2, V
IN
= +1V, R
L
= 150
(Note 2)
40
100
ns
t
OFF
Turn-Off Time
A
V
= +2, V
IN
= +1V, R
L
= 150
(Note 2)
1500
2000
ns
CS
Channel Separation
EL2276 only, f = 5MHz
85
dB
NOTES:
1. DC offset from 0V to 0.714V, AC amplitude 286mV
P-P
, f = 3.58MHz.
2. Measured from the application of the logic signal until the output voltage is at the 50% point between initial and final values.
EL2176, EL2276
4
Test Circuit
(per Amplifier)
Simplified Schematic
(per Amplifier)
EL2176, EL2276
5
Typical Performance Curves
Non-Inverting
Frequency Response (Gain)
Non-Inverting
Frequency Response (Phase)
Frequency Response for
Various R
F
and R
G
Inverting Frequency
Response (Gain)
Transimpedance (R
OL
)
PSRR and CMRR
Frequency Response
for Various C
IN
-
Frequency Response for
Various R
L
and C
L
Inverting Frequency
Response (Phase)
EL2176, EL2276
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