MP7523/XRD7523

Rev. 3.00

E1996

EXAR Corporation, 48720 Kato Road, Fremont, CA 94538

z (510) 668-7000 z (510) 668-7010

FEATURES

• Full Four-Quadrant Multiplying

• Low Feedthrough: 1/2 LSB @ 200 kHz

• Fast Settling: 100 ns (typ.)

• Low Power Dissipation

• Low Cost

• 5 V/15 V Operation

• Buffered Version: MP7524/XRD7524

15 V CMOS

Multiplying 8-Bit

Digital-to-Analog Converter

APPLICATIONS

• Battery Operated Equipment

• Low Power, Ratiometric A/D Converters

• Digitally Controlled Gain Circuits

• Digitally Controlled Attenuators

• CRT Character Generation

• Low Noise Audio Gain Control

January 1996-2

GENERAL DESCRIPTION

The MP7523/XRD7523 is a low cost multiplying Digital-to-

Analog Converter. The device uses an advanced thin-film-on-

CMOS technology to provide 8-bit resolution with accuracy to

10-bits and very low power dissipation.

The MP7523/XRD7523’s excellent multiplying characteris-

tics and low cost allow it to be used in a wide ranging field of ap-

plications such as: low noise audio gain control, CRT character

generation, motor speed control, digitally controlled attenuators,

etc.

SIMPLIFIED BLOCK DIAGRAM

4R

R

2R

2 to 3 Decoder

MSB

LSB

4R

4R

4R

4R

4R

4R

2R

2R

Switch Drivers & Switches

3 Segment D/A Converter with Termination to DGND

BIT 8

R = 10k

BIT 1