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PDF AD632 Data sheet ( Hoja de datos )
| Número de pieza | AD632 | |
| Descripción | Internally Trimmed Precision IC Multiplier | |
| Fabricantes | Analog Devices | |
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FEATURES
Pretrimmed to ±0.5% Max 4-Quadrant Error
All Inputs (X, Y and Z) Differential, High Impedance for
[(X1–X2)(Y1–Y2)/10] + Z2 Transfer Function
Scale-Factor Adjustable to Provide up to X10 Gain
Low Noise Design: 90 V rms, 10 Hz–10 kHz
Low Cost, Monolithic Construction
Excellent Long-Term Stability
APPLICATIONS
High Quality Analog Signal Processing
Differential Ratio and Percentage Computations
Algebraic and Trigonometric Function Synthesis
Accurate Voltage Controlled Oscillators and Filters
Internally Trimmed
Precision IC Multiplier
AD632
PIN CONFIGURATIONS
H-Package TO-100
D-Package TO-116
PRODUCT DESCRIPTION
The AD632 is an internally-trimmed monolithic four-quadrant
multiplier/divider. The AD632B has a maximum multiplying
error of ± 0.5% without external trims.
Excellent supply rejection, low temperature coefficients and
long term stability of the on-chip thin film resistors and buried
zener reference preserve accuracy even under adverse condi-
tions. The simplicity and flexibility of use provide an attractive
alternative approach to the solution of complex control func-
tions.
The AD632 is pin-for-pin compatible with the industry standard
AD532 with improved specifications and a fully differential high
impedance Z-input. The AD632 is capable of providing gains of
up to X10, frequently eliminating the need for separate instru-
mentation amplifiers to precondition the inputs. The AD632
can be effectively employed as a variable gain differential input
amplifier with high common-mode rejection. The effectiveness
of the variable gain capability is enhanced by the inherent low
noise of the AD632: 90 µV rms.
PRODUCT HIGHLIGHTS
Guaranteed Performance Over Temperature
The AD632A and AD632B are specified for maximum multi-
plying errors of ± 1.0% and ± 0.5% of full scale, respectively at
+25°C and are rated for operation from –25°C to +85°C.
Maximum multiplying errors of ± 2.0% (AD632S) and ± 1.0%
(AD632T) are guaranteed over the extended temperature range
of –55°C to +125°C.
High Reliability
The AD632S and AD632T series are also available with
MIL-STD-883 Level B screening and all devices are available in
either the hermetically-sealed TO-100 metal can or TO-116
ceramic DIP package.
REV. A
Information furnished by Analog Devices is believed to be accurate and
reliable. However, no responsibility is assumed by Analog Devices for its
use, nor for any infringements of patents or other rights of third parties
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 617/329-4700 World Wide Web Site: http://www.analog.com
Fax: 617/326-8703
© Analog Devices, Inc., 1997
1 page  
Feedback attenuation also retains the capability for adding a
signal to the output. Signals may be applied to the Z terminal,
where they are amplified by –10, or to the common ground
connection where they are amplified by –1. Input signals may
also be applied to the lower end of the 2.7 kΩ resistor, giving a
gain of +9.
AD632
Without additional trimming, the accuracy of the AD632B is
sufficient to maintain a 1% error over a 10 V to 1 V denomina-
tor range (The AD535 is functionally equivalent to the AD632
and has guaranteed performance in the divider and square-rooter
configurations and is recommended for such applications).
This range may be extended to 100:1 by simply reducing the X
offset with an externally generated trim voltage (range required
is ± 3.5 mV max) applied to the unused X input. To trim, apply
a ramp of +100 mV to +V at 100 Hz to both X1 and Z1 (if X2 is
used for offset adjustment, otherwise reverse the signal polarity)
and adjust the trim voltage to minimize the variation in the
output.*
Since the output will be near +10 V, it should be ac-coupled for
this adjustment. The increase in noise level and reduction in
bandwidth preclude operation much beyond a ratio of 100 to 1.
*See the AD535 data sheet for more details.
Figure 6. Connections for Scale-Factor of Unity
OPERATION AS A DIVIDER
Figure 7 shows the connection required for division. Unlike
earlier products, the AD632 provides differential operation on
both numerator and denominator, allowing the ratio of two
floating variables to be generated. Further flexibility results from
access to a high impedance summing input to Y1. As with all
dividers based on the use of a multiplier in a feedback loop, the
bandwidth is proportional to the denominator magnitude, as
shown in Figure 3.
Figure 7. Basic Divider Connection
REV. A
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5 Page | ||
| Páginas | Total 6 Páginas | |
| PDF Descargar | [ Datasheet AD632.PDF ] | |
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