MP7612

Rev. 3.00

E1996

EXAR Corporation, 48720 Kato Road, Fremont, CA 94538

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

FEATURES

• Eight Independent 12-Bit DACs with Output Amplifiers

• Low Power 320 mW (typ.)

• Serial Digital Data and Address Port (3-Wire

Standard)

• 12-Bit Resolution, 11 Bit Accuracy

• Extremely Well Matched DACs

• Extremely Low Analog Ground Current (<60µA/Channel)

• +10 V Output Swing with +11.4 V Supplies

• Zero Volt Output Preset (Data = 10 .. 00)

• Rugged Construction – Latch-Up Free

• Parallel Version: MP7613

D/A Converter with Output Amplifier

and Serial Data/Address

µP Control Logic

APPLICATIONS

• Data Acquisition Systems

• ATE

• Process Control

• Self-Diagnostic Systems

• Logic Analyzers

• Digital Storage Scopes

• PC Based Controller/DAS

April 1996-4

GENERAL DESCRIPTION

The MP7612 provides eight independent 12-bit resolution

Digital-to-Analog Converters with voltage output amplifiers and

a 3-wire standard serial digital address and data port.

Typical DAC matching for B grade versions is 0.7 LSB across

all codes. Accuracy of +0.75 LSB for DNL and +1 LSB for INL is

also achieved for B grades. The output amplifier is capable of

sinking and sourcing 5mA, and the output voltage settles to

12-bits in less than 30

The MP7612 is equipped with a serial data (3-wire standard)

and board space.

Built using an advanced linear BiCMOS, these devices offer

rugged solutions that are latch-up free, and take advantage of

EXAR’s patented thin-film resistor process which exhibits excel-

lent long term stability and reliability.

SIMPLIFIED BLOCK DIAGRAM

VO0

VO7

SDO

DAC0

DAC7

+

–

+

–

DQ

XR XE

LAT0

LAT7

DQ

XR XE

12

12

RST

+

–

Tri-State Buffer

XE0 - XE7

4 to 16 Decoder

Not Used

8

LD

12

4

SDI

CLK

LD

LAT

DQ

EN

LAT

DQ

EN

A0 to A3

D0 to D11

16-Bit Shift Register

XE0

XE7

LD

8