1
FN7053
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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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.
EL2170, EL2270, EL2470
70MHz/1mA Current Mode Feedback
Amplifiers
The EL2170, EL2270, and EL2470 are
single/dual/quad 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. In spite of their low
supply current, the EL2270 and the EL2470 can output
55mA while swinging to 4V on 5V supplies. The EL2170
can output 100mA with similar output swings. These
attributes make the EL2170, EL2270, and EL2470 excellent
choices for low power and/or low voltage cable-driver, HDSL,
or RGB applications.
For applications where board space is extremely critical, the
EL2170 is available in the tiny 5-pin SOT-23 package, which
has a footprint 28% the size of an 8-pin SO. The EL2170,
EL2270, and EL2470 are each also available in industry
standard pinouts in PDIP and SO packages.
For single and dual applications with disable, consider the
EL2176 (8-pin single) or EL2276 (14-pin dual). For higher
speed applications where power is still a concern, consider
the EL2180/EL2186 family which also comes in similar
single, dual, triple and quad configurations. The
EL2180/EL2186 family provides a -3dB bandwidth of
250MHz while consuming 3mA of supply current per
amplifier.
Features
Single (EL2170), dual (EL2270) & quad (EL2470)
topologies
1mA supply current (per amplifier)
70MHz -3dB bandwidth
Tiny SOT23-5 package (EL2170)
Low cost
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 (EL2170), 55mA
(EL2270), 55mA (EL2470)
Also available with disable in single (EL2176) & dual
(EL2276)
Higher speed EL2180/EL2186 family 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
PACKAGE
TAPE & REEL
PKG. NO.
EL2170CN
8-Pin PDIP
-
MDP0031
EL2170CS
8-Pin SO
-
MDP0027
EL2170CS-T7
8-Pin SO
7"
MDP0027
EL2170CS-T13
8-Pin SO
13"
MDP0027
EL2170CW-T7
5-Pin SOT-23*
7"
MDP0038
EL2170CW-T3
5-Pin SOT-23*
13"
MDP0038
EL2270CN
8-Pin PDIP
-
MDP0031
EL2270CS
8-Pin SO
-
MDP0027
EL2270CS-T7
8-Pin SO
7"
MDP0027
EL2270CS-T13
8-Pin SO
13"
MDP0027
EL2470CN
14-Pin PDIP
-
MDP0031
EL2470CS
14-Pin SO
-
MDP0027
EL2470CS-T7
14-Pin SO
7"
MDP0027
EL2470CS-T13
14-Pin SO
13"
MDP0027
NOTE: *EL2170CW symbol is .Bxxx where xxx represents date
Data Sheet
November 13, 2002
3
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 (EL2170) . . . . . . . . . . . . . . . . . . . . . . . . . . . 120mA
Output Current (EL2270) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60mA
Output Current (EL2470) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 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
,
T
A
= 25C unless otherwise specified.
PARAMETER
DESCRIPTION
CONDITIONS
MIN
TYP
MAX
UNIT
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
EL2270, EL2470 only
0.5
mV
+I
IN
+Input Current
0.5
5
A
d+I
IN
+I
IN
Matching
EL2270, EL2470 only
20
nA
-I
IN
-Input Current
4
15
A
d-I
IN
-I
IN
Matching
EL2270, EL2470 only
1.5
A
CMRR
Common Mode Rejection Ratio
V
CM
= 3.5V
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
EL2170 only
80
100
mA
EL2270 only, per amplifier
50
55
mA
EL2470 only, per amplifier
50
55
mA
I
S
Supply Current
Per amplifier
1
2
mA
AC Electrical Specifications
V
S
= 5V, R
F
= R
G
= 1k
, R
L
= 150
, T
A
= 25C unless otherwise specified
PARAMETER
DESCRIPTION
CONDITIONS
MIN
TYP
MAX
UNIT
-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
EL2170, EL2270, EL2470
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)
Inverting Frequency
Response (Phase)
Frequency Response for
Various R
L
and C
L
Transimpedance (R
OL
)
PSRR and CMRR
Frequency Response
for Various C
IN-
EL2170, EL2270, EL2470
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