AD534 Analog Devices, AD534 Datasheet

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AD534

Manufacturer Part Number
AD534
Description
Internally Trimmed Precision IC Multiplier
Manufacturer
Analog Devices
Datasheet

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a
PRODUCT DESCRIPTION
The AD534 is a monolithic laser trimmed four-quadrant multi-
plier divider having accuracy specifications previously found
only in expensive hybrid or modular products. A maximum
multiplication error of 0.25% is guaranteed for the AD534L
without any external trimming. 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 conditions of use. It is the first multiplier to
offer fully differential, high impedance operation on all inputs,
including the Z-input, a feature which greatly increases its flex-
ibility and ease of use. The scale factor is pretrimmed to the
standard value of 10.00 V; by means of an external resistor, this
can be reduced to values as low as 3 V.
The wide spectrum of applications and the availability of several
grades commend this multiplier as the first choice for all new
designs. The AD534J ( 1% max error), AD534K ( 0.5% max)
and AD534L ( 0.25% max) are specified for operation over the
0 C to +70 C temperature range. The AD534S ( 1% max) and
AD534T ( 0.5% max) are specified over the extended tempera-
ture range, –55 C to +125 C. All grades are available in her-
metically sealed TO-100 metal cans and TO-116 ceramic DIP
packages. AD534J, K, S and T chips are also available.
PROVIDES GAIN WITH LOW NOISE
The AD534 is the first general purpose multiplier capable of
providing gains up to X100, frequently eliminating the need for
separate instrumentation amplifiers to precondition the inputs.
The AD534 can be very effectively employed as a variable gain
differential input amplifier with high common-mode rejection.
The gain option is available in all modes, and will be found to
simplify the implementation of many function-fitting algorithms
REV. B
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.
FEATURES
Pretrimmed to
All Inputs (X, Y and Z) Differential, High Impedance for
Scale-Factor Adjustable to Provide up to X100 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
Wideband, High-Crest rms-to-dc Conversion
Accurate Voltage Controlled Oscillators and Filters
Available in Chip Form
[(X
1
– X
2
) (Y
1
– Y
0.25% max 4-Quadrant Error (AD534L)
2
)/10 V] + Z
2
Transfer Function
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700
Fax: 781/326-8703
such as those used to generate sine and tangent. The utility of
this feature is enhanced by the inherent low noise of the AD534:
90 V, rms (depending on the gain), a factor of 10 lower than
previous monolithic multipliers. Drift and feedthrough are also
substantially reduced over earlier designs.
UNPRECEDENTED FLEXIBILITY
The precise calibration and differential Z-input provide a degree
of flexibility found in no other currently available multiplier.
Standard MDSSR functions (multiplication, division, squaring,
square-rooting) are easily implemented while the restriction to
particular input/output polarities imposed by earlier designs has
been eliminated. Signals may be summed into the output, with
or without gain and with either a positive or negative sense.
Many new modes based on implicit-function synthesis have
been made possible, usually requiring only external passive
components. The output can be in the form of a current, if
desired, facilitating such operations as integration.
SF
Y1
TO-100 (H-10A)
X2
Y2
(Not To Scale)
Package
TOP VIEW
AD534
–V
X1
NC
NC
NC
NC
S
SF
NC = NO CONNECT
PIN CONFIGURATIONS
4
5
6
7
8
Precision IC Multiplier
World Wide Web Site: http://www.analog.com
+V
Z2
S
3
9
OUT
Z1
LCC (E-20A)
Internally Trimmed
(Not To Scale)
10
TOP VIEW
2
Package
AD534
11 12 13
1
20 19
© Analog Devices, Inc., 1999
NC
NC
X1
X2
SF
Y1
Y2
TO-116 (D-14)
NC = NO CONNECT
1
2
3
4
5
6
7
18
17
16
15
14
(Not to Scale)
Package
TOP VIEW
OUT
NC
Z1
NC
Z2
AD534
AD534
14
13
12
11
10
9
8
+V
NC
OUT
Z1
Z2
NC
–V
S
S

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AD534 Summary of contents

Page 1

... The AD534J ( 1% max error), AD534K ( 0.5% max) and AD534L ( 0.25% max) are specified for operation over the +70 C temperature range. The AD534S ( 1% max) and AD534T ( 0.5% max) are specified over the extended tempera- ture range, – +125 C. All grades are available in her- metically sealed TO-100 metal cans and TO-116 ceramic DIP packages ...

Page 2

... AD534JH AD534KH AD534JD AD534KD AD534K Chips Specifications shown in boldface are tested on all production units at final electrical test. Results from those tests are used to calculate outgoing quality levels. All min and and SF. max specifications are guaranteed, although only those shown in boldface are tested S on all production units ...

Page 3

... 0.4 1.0 mV/rms 90 V/rms 150 300 0.8 2 0.35 % 1 AD534TH AD534TD AD534T Chips ...

Page 4

... ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily accumulate on the human body and test equipment and can discharge without detection. Although the AD534 features proprietary ESD protection circuitry, permanent damage may occur on devices subjected to high energy electrostatic discharges. Therefore, proper ESD precautions are recommended to avoid performance degradation or loss of functionality ...

Page 5

... FUNCTIONAL DESCRIPTION Figure functional block diagram of the AD534. Inputs are converted to differential currents by three identical voltage-to- current converters, each trimmed for zero offset. The product of the X and Y currents is generated by a multiplier cell using Gilbert’s translinear technique. An on-chip “Buried Zener” ...

Page 6

... The multiplier scaling voltage affects only open loop gain. The data shown is typical of performance that can be achieved with an AD534K, but even using an AD534J, this technique can readily provide better than 1% accuracy over a wide frequency range, even for crest-factors in excess of 10. ...

Page 7

... AD535 data sheet for more details. REV. B OPERATION AS A SQUARE ROOTER The operation of the AD534 in the square root mode is shown in Figure 7. The diode prevents a latching condition which could occur if the input momentarily changes polarity. As shown, the output is always positive; it may be changed to a negative output by reversing the diode direction and interchang- ing the X inputs ...

Page 8

... AD534–Applications Section The versatility of the AD534 allows the creative designer to implement a variety of circuits such as wattmeters, frequency doublers and automatic gain controls to name but a few +15V – OUT 30k AD534 10k –V – ...

Page 9

... 10M Y – ZERO –15V ADJ 20k 10V; OUTPUT SHOULD BE WITHIN 0.05% (5mV RMS (SINE, SQUARE OR TRIANGULAR-WAVE). IN –9– AD534 +15V 2k 82k 7 OUTPUT 15V APPROX. AD211 1kHz PER VOLT WITH VALUES SHOWN = 8.0V ADJUST C 10k SOLID Ta OUTPUT – ...

Page 10

... AD534–Typical Performance Curves 14 OUTPUT ALL INPUTS 10V POSITIVE OR NEGATIVE SUPPLY – Volts Figure 16. Input/Output Signal Range vs. Supply Voltages 800 700 600 SCALING VOLTAGE = 10V 500 400 300 200 SCALING VOLTAGE = 3V 100 0 –60 –40 –20 ...

Page 11

... Figure 22. Frequency Response as a Multiplier REV +40 +20 1000pF 200pF NORMAL CONNECTION –20 1M 10M Figure 23. Frequency Response vs. Divider Denominator Input Voltage –11– 100mV 10mV rms 100mV rms 10k 100k 1M FREQUENCY – Hz AD534 = 10V rms Z 10M ...

Page 12

... AD534 0.355 (9.02) 0.305 (7.75) 0.370 (9.40) 0.335 (8.51) 0.035 0.89 0.125 (3.18) MIN OUTLINE DIMENSIONS Dimensions shown in inches and (mm). H-10A Package TO-100 REFERENCE PLANE 0.562 (14.30) 0.115 (2.92) 0.185 (4.70) 0.500 (12.70) 0.165 (4.19 0.021 (0.53) (DIM. B) 0.044 (1.12) 0.016 (0.41) 0.034 (0.86) 0.032 (0.81) 0.019 (0.48) (DIM. A) 0.040 (1.01) 0.028 (0.71) 0.016 (0.41) 0.010 (0.25) SEATING PLANE ...

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