EL2170CEL2270CEL2470C
January
1996
Rev
B
EL2170C EL2270C EL2470C
70 MHz 1 mA Current Mode Feedback Amplifiers
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
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 150
X
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
Applications
Low power battery applications
HDSL amplifiers
Video amplifiers
Cable drivers
RGB amplifiers
Test equipment amplifiers
Current to voltage converters
Ordering Information
Part No
Temp Range
Package
Outline
EL2170CN
b
40 C to
a
85 C 8-Pin PDIP
MDP0031
EL2170CS
b
40 C to
a
85 C 8-Pin SOIC
MDP0027
EL2170CW
b
40 C to
a
85 C 5-Pin SOT23
MDP0038
EL2270CN
b
40 C to
a
85 C 8-Pin PDIP
MDP0031
EL2270CS
b
40 C to
a
85 C 8-Pin SOIC
MDP0027
EL2470CN
b
40 C to
a
85 C 14-Pin PDIP
MDP0031
EL2470CS
b
40 C to
a
85 C 14-Pin SOIC
MDP0027
See
Ordering
Information
section
of
databook
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
2170 1
EL2170C SOT23-5
2170 46
Top View
EL2470C SO P-DIP
2170 2
EL2170C EL2270C EL2470C
70 MHz 1 mA Current Mode Feedback Amplifiers
Absolute Maximum Ratings
(T
A
e
25 C)
Voltage between V
Sa
and V
Sb
a
12 6V
Common-Mode Input Voltage
V
Sb
to V
Sa
Differential Input Voltage
g
6V
Current into
a
IN or
b
IN
g
7 5 mA
Internal Power Dissipation
See Curves
Operating Ambient Temperature Range
b
40 C to
a
85 C
Operating Junction Temperature
Plastic Packages
150 C
Output Current (EL2170C)
g
120 mA
Output Current (EL2270C)
g
60 mA
Output Current (EL2470C)
g
60 mA
Storage Temperature Range
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
Test Procedure
I
100% production tested and QA sample tested per QA test plan QCX0002
II
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
III
QA sample tested per QA test plan QCX0002
IV
Parameter is guaranteed (but not tested) by Design and Characterization Data
V
Parameter is typical value at T
A
e
25 C for information purposes only
DC Electrical Characteristics
V
S
e
g
5V R
L
e
150
X T
A
e
25 C unless otherwise specified
Parameter
Description
Conditions
Min
Typ
Max
Test
Units
Level
V
OS
Input Offset Voltage
2 5
15
I
mV
TCV
OS
Average Input Offset
Measured from T
MIN
to T
MAX
5
V
mV C
Voltage Drift
dV
OS
V
OS
Matching
EL2270C EL2470C only
0 5
V
mV
a
I
IN
a
Input Current
0 5
5
I
mA
d
a
I
IN
a
I
IN
Matching
EL2270C EL2470C only
20
V
nA
b
I
IN
b
Input Current
4
15
I
mA
d
b
I
IN
b
I
IN
Matching
EL2270C EL2470C only
1 5
V
mA
CMRR
Common Mode Rejection
V
CM
e
g
3 5V
45
50
I
dB
Ratio
b
ICMR
b
Input Current Common
V
CM
e
g
3 5V
4
10
I
mA V
Mode Rejection
PSRR
Power Supply Rejection
V
S
is moved from
g
4V to
g
6V
60
70
I
dB
Ratio
b
IPSR
b
Input Current Power
V
S
is moved from
g
4V to
g
6V
0 5
5
I
mA V
Supply Rejection
R
OL
Transimpedance
V
OUT
e
g
2 5V
150
400
I
k
X
a
R
IN
a
Input Resistance
V
CM
e
g
3 5V
1
4
I
M
X
a
C
IN
a
Input Capacitance
1 2
V
pF
CMIR
Common Mode Input Range
g
3 5
g
4 0
I
V
2
TD
is
38in
EL2170C EL2270C EL2470C
70 MHz 1 mA Current Mode Feedback Amplifiers
DC Electrical Characteristics
Contd
V
S
e
g
5V R
L
e
150
X T
A
e
25 C unless otherwise specified
Parameter
Description
Conditions
Min
Typ
Max
Test
Units
Level
V
O
Output Voltage Swing
V
S
e
g
5
g
3 5
g
4 0
I
V
V
S
e a
5 Single-Supply High
4 0
V
V
V
S
e a
5 Single-Supply Low
0 3
V
V
I
O
Output Current
EL2170C only
80
100
I
mA
EL2270C only per Amplifier
50
55
I
mA
EL2470C only per Amplifier
50
55
I
mA
I
S
Supply Current
Per Amplifier
1
2
I
mA
AC Electrical Characteristics
V
S
e
g
5V R
F
e
R
G
e
1 k
X R
L
e
150
X T
A
e
25 C unless otherwise specified
Parameter
Description
Conditions
Min
Typ
Max
Test
Units
Level
b
3 dB BW
b
3 dB Bandwidth
A
V
e a
1
70
V
MHz
b
3 dB BW
b
3 dB Bandwidth
A
V
e a
2
60
V
MHz
SR
Slew Rate
V
OUT
e
g
2 5V A
V
e a
2
400
800
IV
V
ms
t
r
t
f
Rise and Fall Time
V
OUT
e
g
500 mV
4 5
V
ns
t
pd
Propagation Delay
V
OUT
e
g
500 mV
4 5
V
ns
OS
Overshoot
V
OUT
e
g
500 mV
3 0
V
%
t
s
0 1% Settling
V
OUT
e
g
2 5V A
V
e b
1
40
V
ns
dG
Differential Gain
A
V
e a
2 R
L
e
150
X (Note 1)
0 15
V
%
dP
Differential Phase
A
V
e a
2 R
L
e
150
X (Note 1)
0 15
V
dG
Differential Gain
A
V
e a
1 R
L
e
500
X (Note 1)
0 02
V
%
dP
Differential Phase
A
V
e a
1 R
L
e
500
X (Note 1)
0 01
V
C
S
Channel Separation
EL2270C EL2470C only f
e
5 MHz
85
V
dB
Note 1 DC offset from 0V to 0 714V AC amplitude 286 mV
P-P
f
e
3 58 MHz
3
TD
is
16in
TD
is
26in
EL2170C EL2270C EL2470C
70 MHz 1 mA Current Mode Feedback Amplifiers
Typical Performance Curves
Frequency Response (Gain)
Non-Inverting
2170 5
Frequency Response (Phase)
Non-Inverting
2170 6
Various R
F
and R
G
Frequency Response for
2170 7
Response (Gain)
Inverting Frequency
2170 8
Response (Phase)
Inverting Frequency
2170 9
Various R
L
and C
L
Frequency Response for
2170 10
Transimpedance (R
OL
)
2170 11
PSRR and CMRR
2170 12
for Various C
INb
Frequency Response
2170 13
5
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