© 1995 Elantec, Inc.
EL
4450C
General Description
The EL4450C is a complete four-quadrant multiplier circuit. It offers
wide bandwidth and good linearity while including a powerful output
voltage amplifier, drawing modest supply current.
The EL4450C operates on ±5V supplies and has an analog input range
of ±2V, making it ideal for video signal processing. AC characteristics
do not vary over the ±5V to ±15V supply range.
The multiplier has an operational temperature range of -40°C to
+85°C and are packaged in plastic 14-pin P-DIP and SO.
Connection Diagrams
Features
· Complete four-quadrant multiplier
with output amp--requires no
extra components
· Good linearity of 0.3%
· 90 MHz bandwidth for both X and
Y inputs
· Operates on ±5V to ±15V supplies
· All inputs are differential
· 400V/µs slew rate
Applications
· Modulation/Demodulation
· RMS computation
· Real-time power computation
· Nonlinearity correction/generation
Ordering Information
Part No.
Temp. Range
Package
Outline #
EL4450CN
-40°C to +85°C
14-Pin P-DIP
MDP0031
EL4450CS
-40°C to +85°C
14-Lead SO
MDP0027
EL4450C
Wideband Four-Quadrant Multiplier
Jan
uary 1996 Rev B
D44450B.fm Page 1 Tuesday, April 21, 1998 9:51 AM
2
EL4450C
Wideband Four-Quadrant Multiplier
E
L
4450C
Absolute Maximum Ratings
(T
A
= 25 °C)
V+
Positive Supply Voltage
16.5V
V
S
V+ to V- Supply Voltage
33V
V
IN
Voltage at any Input or Feedback
V+ to V-
V
IN
Difference between Pairs of Inputs or Feedback
6V
I
IN
Current into any Input or Feedback Pin
4 mA
I
OUT
Output Current
30 mA
P
D
Maximum Power Dissipation
See Curves
T
A
Operating Temperature Range
-40°C to +85°C
T
S
Storage Temperature Range
-60°C to +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, therefor T
J
= T
C
= 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
= 25°C and QA sample tested at T
A
= 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
= 25°C for information purposes only.
Open-Loop DC Electrical Characteristics
Power Supplies at ±5V, T
A
= 25°C, V
FB
= V
OUT
.
Parameter
Description
Min
Typ
Max
Test Level
Units
V
DIFF
Differential Input Voltage--Clipping
1.8
2.0
I
V
0.2% nonlinearity
1.0
V
V
V
CM
Common-Mode Range of V
DIFF
= 0, V
S
= ±5V
±2.5
±2.8
I
V
V
S
= ±15V
±12.5
±12.8
I
V
V
OS
Input Offset Voltage
8
35
I
mV
I
B
Input Bias Current
9
20
I
µA
I
OS
Input Offset Current between X
IN
+ and X
IN
-, Y
IN
+ and Y
IN
-, REF and FB
0.5
4
I
µA
Gain
Gain Factor of V
OUT
= Gain
×
X
IN
+
×
Y
IN
0.45
0.5
0.55
I
V/V
2
NLx
Nonlinearity of X Input; X
IN
between -1V and +1V
0.3
0.7
I
%
NLy
Nonlinearity of Y Input; Y
IN
between -1V and +1V
0.2
0.35
I
%
R
IN
Input resistance
X
IN+
to X
IN-
, Y
IN+
to Y
IN-
,
230
V
k
REF to FB
90
CMRR
Common-Mode Rejection Ratio, X
IN
and Y
IN
70
90
I
dB
PSRR
Power-Supply Rejection Ratio, FB
60
72
I
dB
V
O
Output Voltage Swing
(V
IN
= 0, V
REF
Varied)
V
S
= ±5V
±2.5
±2.8
I
V
V
S
= ±15V
±12.5
±12.8
I
SC
Output Short-Circuit Current
40
85
I
mA
I
S
Supply Current, V
S
= ±15V
15.4
18
I
mA
D44450B.fm Page 2 Tuesday, April 21, 1998 9:51 AM
3
EL4450C
Wideband Four-Quadrant Multiplier
EL
4450C
Test Circuit
Typical Performance Curves
Closed-Loop AC Electrical Characteristics
Power Supplies at ±12V, T
A
= 25°C, R
L
= 500¾, C
L
= 15pF
Parameter
Description
Min
Typ
Max
Test Level
Units
BW, -3 dB
-3 dB Small-Signal Bandwidth, X or Y
90
V
MHz
BW, ±0.1 dB
0.1 dB Flatness Bandwidth
10
V
MHz
Peaking
Frequency Response Peaking
1.0
V
dB
SR
Slew Rate, V
OUT
between -2V and +2V
300
400
I
V/µs
V
N
Input-Referred Noise Voltage Density
100
V
nV/Hz
Note: For typical performance curves, R
F
= 0, R
G
= ×, V
S
= ±5V, R
L
= 500¾, and C
L
= 15 pF unless otherwise noted.
Transfer Function of X Input for
Various Y Inputs
Transfer Function of Y Input for
Various X Inputs
D44450B.fm Page 3 Tuesday, April 21, 1998 9:51 AM
4
EL4450C
Wideband Four-Quadrant Multiplier
E
L
4450C
Frequency Response
for Various Feedback
Divider Ratios
Frequency Response
for Various R
L
, C
L
V
S
= ±5V
Frequency Response
for Various R
L
, C
L
V
S
= ±15V
X Input Frequency Response
for Various Y DC Inputs
Y Input Frequency Response
for Various X DC Inputs
-3 dB Bandwidth
and Peaking
vs Supply Voltage
Change in Bandwidth
and Peaking vs Temperature
Total Harmonic Distortion
of X Input vs Frequency
Total Harmonic Distortion
of Y Input vs Frequency
D44450B.fm Page 4 Tuesday, April 21, 1998 9:51 AM
5
EL4450C
Wideband Four-Quadrant Multiplier
EL
4450C
Slew Rate
vs Supply Voltage
Slew Rate
vs Die Temperature
CMRR vs Frequency
Input Voltage Noise
vs Frequency
Nonlinearity of X Input
Nonlinearity of Y Input
Bias Current
vs Die Temperature
Common-Mode Input Range
vs Supply Voltage
D44450B.fm Page 5 Tuesday, April 21, 1998 9:51 AM
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