EL2170C EL2270C EL2470C
EL2170C EL2270C EL2470C
70 MHz 1 mA Current Mode Feedback Amplifiers
Features
Single (EL2170C) dual
(EL2270C) and quad (EL2470C)
topologies
1 mA supply current (per
amplifier)
70 MHz
b
3 dB bandwidth
Tiny SOT23-5 Package
(EL2170C)
Low cost
Single- and dual-supply
operation down to
g
1 5V
0 15% 0 15 diff gain diff phase
into 150X
800 V
ms
slew rate
Large output drive current
100 mA (EL2170C)
55 mA (EL2270C)
55 mA (EL2470C)
Also available with disable in
single (EL2176C) and dual
(EL2276C)
Higher speed EL2180C EL2186C
family also available (3 mA
250 MHz) in single dual and
quad
General Description
The EL2170C EL2270C EL2470C are single dual quad cur-
rent-feedback operational amplifiers which achieve a
b
3 dB
bandwidth of 70 MHz at a gain of
a
1 while consuming only
1 mA of supply current per amplifier They will operate with
dual supplies ranging from
g
1 5V to
g
6V or from single sup-
plies ranging from
a
3V to
a
12V In spite of their low supply
current the EL2270C and the EL2470C can output 55 mA while
swinging to
g
4V on
g
5V supplies The EL2170C can output
100 mA with similar output swings These attributes make the
EL2170C EL2270C EL2470C excellent choices for low power
and or low voltage cable-driver HDSL or RGB applications
For applications where board space is extremely critical the
EL2170C is available in the tiny 5-Lead SOT23 package which
has a footprint 28% the size of an 8-Lead SOIC The EL2170C
EL2270C EL2470C are each also available in industry standard
pinouts in PDIP and SOIC packages
For Single and Dual applications with disable consider the
EL2176C (8-Pin Single) or EL2276C (14-Pin Dual) For higher
speed applications where power is still a concern consider the
EL2180C El2186C family which also comes in similar Single
Dual Triple and Quad configurations The EL2180C EL2186C
family provides a
b
3 dB bandwidth of 250 MHz while consum-
ing 3 mA of supply current per amplifier
Connection Diagrams
EL2170C SO P-DIP
EL2270C SO P-DIP
Applications
Low power battery applications
HDSL amplifiers
Video amplifiers
Cable drivers
RGB amplifiers
Test equipment amplifiers
Current to voltage converters
2170 – 1
EL2170C SOT23-5
EL2470C SO P-DIP
January 1996 Rev B
Ordering Information
Part No
Temp Range
Package
Outline
MDP0031
MDP0027
MDP0038
MDP0031
MDP0027
MDP0031
MDP0027
2170 – 46
EL2170CN
b
40 C to
a
85 C 8-Pin PDIP
EL2170CS
b
40 C to
a
85 C 8-Pin SOIC
EL2170CW
b
40 C to
a
85 C 5-Pin SOT23
EL2270CN
b
40 C to
a
85 C 8-Pin PDIP
EL2270CS
b
40 C to
a
85 C 8-Pin SOIC
EL2470CN
b
40 C to
a
85 C 14-Pin PDIP
EL2470CS
b
40 C to
a
85 C 14-Pin SOIC
Top View
See Ordering
databook
Information
section
of
2170 – 2
Note
All information contained in this data sheet has been carefully checked and is believed to be accurate as of the date of publication however this data sheet cannot be a ‘‘controlled document’’ Current revisions if any to these
specifications are maintained at the factory and are available upon your request We recommend checking the revision level before finalization of your design documentation
1995 Elantec Inc
EL2170C EL2270C EL2470C
70 MHz 1 mA Current Mode Feedback Amplifiers
Absolute Maximum Ratings
(T
A
e
25 C)
Voltage between V
S
a
and V
S
b
Common-Mode Input Voltage
Differential Input Voltage
Current into
a
IN or
b
IN
Internal Power Dissipation
Operating Ambient Temperature Range
a
12 6V
V
S
b
to V
S
a
g
6V
g
7 5 mA
See Curves
b
40 C to
a
85 C
Operating Junction Temperature
Plastic Packages
Output Current (EL2170C)
Output Current (EL2270C)
Output Current (EL2470C)
Storage Temperature Range
150 C
g
120 mA
g
60 mA
g
60 mA
b
65 C to
a
150 C
Important Note
All parameters having Min Max specifications are guaranteed The Test Level column indicates the specific device testing actually
performed during production and Quality inspection Elantec performs most electrical tests using modern high-speed automatic test
equipment specifically the LTX77 Series system Unless otherwise noted all tests are pulsed tests therefore T
J
e
T
C
e
T
A
Test Level
I
II
III
IV
V
Test Procedure
100% production tested and QA sample tested per QA test plan QCX0002
100% production tested at T
A
e
25 C and QA sample tested at T
A
e
25 C
T
MAX
and T
MIN
per QA test plan QCX0002
QA sample tested per QA test plan QCX0002
Parameter is guaranteed (but not tested) by Design and Characterization Data
Parameter is typical value at T
A
e
25 C for information purposes only
DC Electrical Characteristics
V
S
e
g
5V
Parameter
V
OS
TCV
OS
dV
OS
a
I
IN
R
L
e
150X T
A
e
25 C unless otherwise specified
Min
Typ
25
Max
15
Test
Level
I
V
V
5
I
V
15
I
V
I
10
I
I
5
I
I
I
V
I
Units
mV
mV
C
mV
mA
nA
mA
mA
dB
mA
V
dB
mA
V
kX
MX
pF
V
Description
Input Offset Voltage
Average Input Offset
Voltage Drift
V
OS
Matching
a
Input Current
a
I
IN
Matching
b
Input Current
b
I
IN
Matching
Conditions
Measured from T
MIN
to T
MAX
EL2270C EL2470C only
5
05
05
d
a
I
IN
b
I
IN
EL2270C EL2470C only
20
4
d
b
I
IN
CMRR
b
ICMR
EL2270C EL2470C only
V
CM
e
g
3 5V
V
CM
e
g
3 5V
V
S
is moved from
g
4V to
g
6V
V
S
is moved from
g
4V to
g
6V
V
OUT
e
g
2 5V
V
CM
e
g
3 5V
150
1
60
45
15
50
4
70
05
400
4
12
g
3 5
g
4 0
Common Mode Rejection
Ratio
b
Input Current Common
Mode Rejection
PSRR
b
IPSR
Power Supply Rejection
Ratio
b
Input Current Power
Supply Rejection
R
OL
a
R
IN
a
C
IN
Transimpedance
a
Input Resistance
a
Input Capacitance
CMIR
Common Mode Input Range
2
EL2170C EL2270C EL2470C
70 MHz 1 mA Current Mode Feedback Amplifiers
DC Electrical Characteristics
Parameter
V
O
Description
Output Voltage Swing
Contd
Conditions
Min
g
3 5
V
S
e
g
5V R
L
e
150X T
A
e
25 C unless otherwise specified
Typ
g
4 0
Max
Test
Level
I
V
V
I
I
I
Units
V
V
V
mA
mA
mA
mA
V
S
e
g
5
V
S
e a
5 Single-Supply High
V
S
e a
5 Single-Supply Low
40
03
80
50
50
100
55
55
1
2
I
O
Output Current
EL2170C only
EL2270C only per Amplifier
EL2470C only per Amplifier
I
S
Supply Current
Per Amplifier
I
AC Electrical Characteristics
V
S
e
g
5V R
F
e
R
G
e
1 kX R
L
e
150X T
A
e
25 C unless otherwise specified
Parameter
b
3 dB BW
b
3 dB BW
Description
b
3 dB Bandwidth
b
3 dB Bandwidth
Conditions
A
V
e a
1
A
V
e a
2
V
OUT
e
g
2 5V A
V
e a
2
V
OUT
e
g
500 mV
V
OUT
e
g
500 mV
V
OUT
e
g
500 mV
V
OUT
e
g
2 5V A
V
e b
1
A
V
e a
2 R
L
e
150X (Note 1)
A
V
e a
2 R
L
e
150X (Note 1)
A
V
e a
1 R
L
e
500X (Note 1)
A
V
e a
1 R
L
e
500X (Note 1)
EL2270C EL2470C only f
e
5 MHz
Min
Typ
70
60
Max
Test
Level
V
V
IV
V
V
V
V
V
V
V
V
V
Units
MHz
MHz
V
ms
ns
ns
%
ns
%
SR
t
r
t
f
t
pd
OS
t
s
dG
dP
dG
dP
C
S
Slew Rate
Rise and Fall Time
Propagation Delay
Overshoot
0 1% Settling
Differential Gain
Differential Phase
Differential Gain
Differential Phase
Channel Separation
400
800
45
45
30
40
0 15
0 15
0 02
0 01
85
%
dB
Note 1 DC offset from 0V to 0 714V AC amplitude 286 mV
P-P
f
e
3 58 MHz
3
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