www.fairchildsemi.com
RC4200
Analog Multiplier
Features
鈥?High accuracy
鈥?Nonlinearity 鈥?0.1%
Temperature coef鏗乧ient 鈥?0.005%/擄C
鈥?Multiple functions
鈥?Multiply, divide, square, square root, RMS-to-DC
conversion, AGC and modulate/demodulate
鈥?Wide bandwidth 鈥?4 MHz
鈥?Signal-to-noise ratio 鈥?94 dB
Description
The RC4200 analog multiplier has complete compensation
for nonlinearity, the primary source of error and distortion.
This multiplier also has three onboard operational ampli鏗乪rs
designed speci鏗乧ally for use in multiplier logging circuits.
These ampli鏗乪rs are frequency compensated for optimum
AC response in a logging circuit, the heart of a multiplier,
and can therefore provide superior AC response.
The RC4200 can be used in a wide variety of applications
without sacri鏗乧ing accuracy. Four-quadrant multiplication,
two-quadrant division, square rooting, squaring and RMS
conversion can all be easily implemented with predictable
accuracy. The nonlinearity compensation is not just trimmed
at a single temperature, it is designed to provide compensa-
tion over the full temperature range. This nonlinearity
compensation combined with the low gain and offset drift
inherent in a well-designed monolithic chip provides a very
high accuracy and a low temperature coef鏗乧ient.
Applications
鈥?Low distortion audio modulation circuits
鈥?Voltage-controlled active 鏗乴ters
鈥?Precision oscillators
Block Diagram
I2
I1
鈥?/div>
+
鈥?/div>
V
OS2
+
+
鈥?/div>
Q3
I3
Q4
I4
V
OS1
Q2
Q1
RC4200
65-4200-01
REV. 1.2.1 6/14/01
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