ELANT EL4451CN, EL4451CS Datasheet
EL4451C
Wideband Variable-Gain Amplifier, Gain of 2
EL4451C October 1994 Rev A
Features
# Complete variable-gain amplifier
with output amplifier, requires
no extra components
# Excellent linearity of 0.2%
# 70 MHz signal bandwidth
# Operates on
g
5V tog15V
supplies
# All inputs are differential
# 400V/ms slew rate
l
#
70dB attenuation@4 MHz
Applications
# Leveling of varying inputs
# Variable filters
# Fading
# Text insertion into video
Ordering Information
Part No. Temp. Range Package Outline
EL4451CNb40§Ctoa85§C 14-Pin P-DIP MDP0031
EL4451CSb40§Ctoa85§C 14-Lead SO MDP0027
General Description
The EL4451C is a complete variable gain circuit. It offers wide
bandwidth and excellent linearity while including a powerful
output voltage amplifier, drawing modest supply current.
The EL4451C operates on
analog input range of
g
5V tog15V supplies and has an
g
2V, making it ideal for video signal
processing. AC characteristics do not change appreciably over
g
the
5V tog15V supply range.
The circuit has an operational temperature range of
a
85§C and is packaged in plastic 14-pin DIP and 14-lead SO.
The EL4451C is fabricated with Elantec’s proprietary complementary bipolar process which provides excellent signal symmetry and is free from latch up.
Connection Diagram
Ý
b
40§Cto
4451-1
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.
©
1994 Elantec, Inc.
EL4451C
Wideband Variable-Gain Amplifier, Gain of 2
Absolute Maximum Ratings
a
Positive Supply Voltage 16.5V
V
V
Vato VbSupply Voltage 33V
S
V
Voltage at any Input or Feedback Vato V
IN
DVINDifference between Pairs
of Inputs or Feedback 6V
I
Current into any Input, or Feedback Pin 4mA
IN
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
Test Level Test Procedure
I 100% production tested and QA sample tested per QA test plan QCX0002.
II 100% production tested at T
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
T
MAX
and T
MIN
A
per QA test plan QCX0002.
Open-Loop DC Electrical Characteristics
Parameter Description Min Typ Max
V
V
V
DIFF
CM
OS
Signal input differential input voltage - Clipping 1.8 2.0 I V
0.2% nonlinearity 1.3 V V
Common-mode range of VIN;V
e
g
V
15V
s
Input offset voltage 7 25 I mV
e
(T
25§C)
A
e
25§C and QA sample tested at T
e
25§C for information purposes only.
A
e
DIFF
b
0, V
I
OUT
P
D
T
A
T
S
e
g
5V
s
Continuous Output Current 30mA
Maximum Power Dissipation See Curves
e
J
25§C, R
Level
b
40§Ctoa85§C
b
60§Ctoa150§C
e
T
TA.
C
e
500X.
L
Test
Units
Operating Temperature Range
Storage Temperature Range
e
25§C,
A
Power Supplies atg5V, T
g
2.0
g
2.8 I V
g
12.8 V V
e
A
VOS, FB Output offset voltage 8 25 I mV
V
G, 100%
V
G, 0%
V
G, 1V
I
B
I
OS
NL Nonlinearity, VINbetweenb1V anda1V, V
Ft Signal feedthrough, V
RIN,V
IN
Extrapolated voltage for 100% gain 1.9 2.1 2.2 I V
Extrapolated voltage for 0% gain
Gain at V
e
1V 0.95 1.05 1.15 I V/V
GAIN
Input bias current (all inputs)
Input offset current between V
a
Gain
and Gainb, FB and Ref
Input resistance, V
IN
G
eb
IN
1V
a
and V
b
b
b
,
IN
e
1V 0.2 0.5 I %
G
100 230 I KX
0.16
20
b
0.06 0.06 I V
b
90 I mA
0.2 4 I mA
b
100
b
70 I dB
RIN, FB Input resistance, FB 200 460 V KX
R
IN,RGAIN
Input resistance, gain input 50 100 I KX
TD is 3.3in
2
EL4451C
Wideband Variable-Gain Amplifier, Gain of 2
Open-Loop DC Electrical Characteristics
Power Supplies atg5V, T
e
25§C, R
A
Parameter Description Min Typ Max
CMRR Common-mode rejection ratio of V
PSRR Power supply rejection ratio of VOS,FB,V
V
O
I
SC
I
S
Output voltage swing V
e
(V
0, V
IN
Output short-circuit current 40 85 I mA
Supply current, V
e
500X.
L
IN
e
g
S
e
g
5V
S
e
varied) V
REF
e
g
15V 15.5 18 I mA
S
g
15V
S
Ð Contd.
Test
Level
70 90 I dB
5V tog15V 50 60 I dB
g
g
2.5
12.5
g
2.8
g
12.8
IV
Closed-Loop AC Electrical Characteristics
Power supplies atg12V, T
e
25§C. R
A
Parameter Description Min Typ Max
BW,b3dB
b
3dB small-signal bandwidth, signal input 70 V MHz
BW,g0.1dB 0.1dB flatness bandwidth, signal input 10 V MHz
Peaking Frequency response peaking 0.6 V dB
BW, gain
SR Slew rate, V
V
N
b
3dB small-signal bandwidth, gain input 70 V MHz
OUT
Input referred noise voltage density 110 V nV/SHz
dG Differential gain error, Voffset betweenb0.7V anda0.7V 0.9 V %
di Differential phase error, Voffset betweenb0.7V anda0.7V 0. 2 V
L
e
500X,C
L
e
15pF, V
betweenb2V anda2V, R
e
1V
G
Test
Level
e
e
R
F
500X 400 V V/ms
G
Units
Units
§
TD is 1.8in TD is 1.8in
Test Circuit
Note: For typical performance curves, R
e
e %
0, R
F
G
,V
GAIN
e
1V, R
e
L
500X, and C
e
15 pF unless otherwise noted.
L
4451– 3
3
EL4451C
Wideband Variable-Gain Amplifier, Gain of 2
Typical Performance Curves
Frequency Response
for Various Feedback
Divider Ratios
Gain,b3 dB Bandwidth,
and Peaking
vs Load Resistance
4451– 4
Frequency Response
for Various R
e
V
S
b
3 dB Bandwidth and Peaking
vs Supply Voltage
L,CL
g
5V
4451– 5
Frequency Response
for Various R
e
V
S
b
3 dB Bandwidth and Peaking
vs Die Temperature
L,CL
g
15V
4451– 6
Frequency Response for
Various Gain Settings
4451– 7
4451– 10
Slew Rate
vs Supply Voltage
4
4451– 8
4451– 11
Slew Rate
vs Die Temperature
4451– 9
4451– 12
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