MPY634

SBFS017A – DECEMBER 1995 – REVISED DECEMBER 2004

www.ti.com

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of Texas Instruments

standard warranty. Production processing does not necessarily include

testing of all parameters.

Copyright © 1995-2004, Texas Instruments Incorporated

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

All trademarks are the property of their respective owners.

FEATURES

q WIDE BANDWIDTH: 10MHz typ

q

±0.5% MAX FOUR-QUADRANT

ACCURACY

q INTERNAL WIDE-BANDWIDTH OP AMP

q EASY TO USE

q LOW COST

APPLICATIONS

q PRECISION ANALOG SIGNAL

PROCESSING

q MODULATION AND DEMODULATION

q VOLTAGE-CONTROLLED AMPLIFIERS

q VIDEO SIGNAL PROCESSING

q VOLTAGE-CONTROLLED FILTERS AND

OSCILLATORS

DESCRIPTION

The MPY634 is a wide bandwidth, high accuracy, four-

quadrant analog multiplier. Its accurately laser-trimmed

multiplier characteristics make it easy to use in a wide

variety of applications with a minimum of external parts,

often eliminating all external trimming. Its differential X, Y,

and Z inputs allow configuration as a multiplier, squarer,

divider, square-rooter, and other functions while maintain-

ing high accuracy.

The wide bandwidth of this new design allows signal

processing at IF, RF, and video frequencies. The internal

output

amplifier

of

the

MPY634

reduces

design complexity compared to other high frequency mul-

tipliers and balanced modulator circuits. It is

capable of performing frequency mixing, balanced modula-

tion, and demodulation with excellent carrier rejection.

An accurate internal voltage reference provides

precise setting of the scale factor. The differential Z input

allows user-selected scale factors from 0.1 to 10 using

external feedback resistors.

V-I

X

1

X

2

Y

1

Y

2

Z

1

Z

2

V-I

V-I

SF

Multiplier

Core

Voltage

Reference

and Bias

0.75 Atten

A

V

OUT

–V

S

+V

S

(X

1 – X2)(Y1 – Y2)

SF

V

OUT = A

– (Z

1 – Z2)

Transfer Function

Precision

Output

Op Amp

Wide Bandwidth

PRECISION ANALOG MULTIPLIER