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National Semiconductor |
February 1995
LH0094 Multifunction Converter
General Description
The LH0094 multifunction converter generates an output
voltage per the transfer function
JEO e Vy
VZ
m
0 1sms10 m continuously adjustable
VX
m is set by 2 resistors
Features
Y Low cost
Y Versatile
Y High accuracyb0 05%
Y Wide supply rangebg5V to g22V
Block and Connection Diagrams
Y Minimum component count
Y Internal matched resistor pair for setting me2 and
me0 5
Applications
Y Precision divider multiplier
Y Square root
Y Square
Y Trigonometric function generator
Y Companding
Y Linearization
Y Control systems
Y Log amp
Dual-In-Line Package
Order Number LH0094CD
See NS Package Number D16D
Simplified Schematic
C1995 National Semiconductor Corporation TL H 5695
TL H 5695 – 1
RRD-B30M115 Printed in U S A
Absolute Maximum Ratings (Note 1)
If Military Aerospace specified devices are required
please contact the National Semiconductor Sales
Office Distributors for availability and specifications
Supply Voltage
g22V
Input Voltage
g22V
Output Short-Circuit Duration
Continuous
Operating Temperature Range
LH0094CD
Storage Temperature Range
LH0094CD
Lead Temperature
(Soldering 10 seconds)
b25 C to a85 C
b55 C to a125 C
260 C
Electrical Characteristics
VS
e
g15V
TA e 25 C unless otherwise specified
Transfer function
EO
e
VY
VZm
VX
0 1 s m s 10
OV s VX
VY
VZ s 10V
Parameter
Conditions
LH0094C
Min Typ Max
Units
ACCURACY
Multiply
Untrimmed
External Trim
Divide
Untrimmed
External Trim
Square Root
Untrimmed
External Trim
Square
Untrimmed
External Trim
Low Level
Square Root
Exponential
Circuits
OUTPUT OFFSET
EOeVZVY (0 03sVYs10V 0 01sVZs10V)
(Figure 2)
(Figure 3)
vs Temperature
EOe10VZ VX
(Figure 4) 0 5sVXs10 0 01sVZs10)
(Figure 5) (0 1sVXs10 0 01sVZs10)
vs Temperature
EOe100VZ 10
(Figure 8) (0 03sVZs10
(Figure 9) (0 01sVZs10
EOe10 (VZ 10)2 (0 1sVZs10)
(Figure 6)
(Figure 7)
EOe010VZ 5 0mVsVZs10V (Figure 10)
me0 2 EOe10 (VZ 10)2 (Figure 11) (0 1sVZs10)
me5 0 EOe10 (VZ 10)5 (Figure 11) (1 0sVZs10)
10
0 15
0 45 0 9
01
02
0 45 0 9
01
02
0 45 0 9
0 15
20 %FS
%FS
0 05
0 08
0 08
%FS
(10V)
%FS
mV C
%FS
%FS
mV C
%FS
%FS
%FS
%FS
%FS
VXe10V VYeVZe0
AC CHARACTERISTICS
5 0 10
mV
3 dB Bandwidth
Noise
EXPONENT
me1 0 VXe10V VYe0 1 Vrms
10 Hz to 1 0 kHz me1 0 VYeVZeOV
VXe10V
VXe0 1V
10 kHz
100 mV rms
300 mV rms
m
0 2 to
0 1 to
5 0 10
INPUT CHARACTERISTICS
Input Voltage
Input Impedance
(For Rated Performance)
(All Inputs)
0
98 100
10
V
kX
OUTPUT CHARACTERISTICS
Output Swing
Output Impedance
Supply Current
(RLs10k)
(VSe g15V) (Note 1)
10 12
10
30 50
V
X
mA
Note 1 Refer to RETS0094D drawing for specifications of the military LH00940 version
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