Low Cost

Analog Multiplier

Enhanced Product

AD633-EP

Rev. B

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FEATURES

4-quadrant multiplication

Low cost, 8-lead SOIC package

Complete—no external components required

Laser-trimmed accuracy and stability

Total error within 2% of full scale

Differential high impedance X and Y inputs

High impedance unity-gain summing input

Laser-trimmed 10 V scaling reference

ENHANCED PRODUCT FEATURES

Supports defense and aerospace applications (AQEC

standard)

Military temperature range (−55°C to +125°C)

Controlled manufacturing baseline

One assembly/test site

One fabrication site

Enhanced product change notification

Qualification data available on request

APPLICATIONS

Multiplication, division, squaring

Modulation/demodulation, phase detection

Voltage-controlled amplifiers/attenuators/filters

FUNCTIONAL BLOCK DIAGRAM

1

A

1

10V

X1

X2

Y1

Y2

W

Z

Figure 1.

GENERAL DESCRIPTION

The AD633-EP is a functionally complete, four-quadrant, analog

multiplier. It includes high impedance, differential X and Y inputs,

and a high impedance summing input (Z). The low impedance

output voltage is a nominal 10 V full scale provided by a buried

Zener.

The AD633-EP is laser calibrated to a guaranteed total accuracy

of 2% of full scale. Nonlinearity for the Y input is typically less

than 0.1% and noise referred to the output is typically less than

100 µV rms in a 10 Hz to 10 kHz bandwidth. A 1 MHz bandwidth,

20 V/µs slew rate, and the ability to drive capacitive loads make

the AD633-EP useful in a wide variety of applications where

simplicity and cost are key concerns.

The versatility of the AD633-EP is not compromised by its sim-

plicity. The Z input provides access to the output buffer amplifier,

enabling the user to sum the outputs of two or more multipliers,

increase the multiplier gain, convert the output voltage to a current,

and configure a variety of applications. For further information,

see the Multiplier Application Guide.

The AD633-EP is available in an 8-lead SOIC package. It is

specified to operate over the −55°C to +125°C military

temperature range.

Additional application and technical information can be found

in the AD633 data sheet.

PRODUCT HIGHLIGHTS

1. The AD633-EP is a complete four-quadrant multiplier

offered in a low cost 8-lead SOIC package. The result is a

product that is cost effective and easy to apply.

2. No external components or expensive user calibration are

required to apply the AD633-EP.

3. Monolithic construction and laser calibration make the

device stable and reliable.

4. High (10 MΩ) input resistances make signal source

loading negligible.

5. Power supply voltages can range from ±8 V to ±18 V. The

internal scaling voltage is generated by a stable Zener diode;

multiplier accuracy is essentially supply insensitive.