REV. A

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use, nor for any infringements of patents or other rights of third parties

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a

Quad 8-Bit Multiplying CMOS

D/A Converter with Memory

DAC8408

A common 8-bit TTL/CMOS compatible input port is used to

load data into any of the four DAC data-latches. Control lines

DS1

, DS2, and A/B determine which DAC will accept data.

Data loading is similar to that of a RAMs write cycle. Data can

be read back onto the same data bus with control line R/W. The

DAC8408 is bus compatible with most 8-bit microprocessors,

including the 6800, 8080, 8085, and Z80. The DAC8408 oper-

ates on a single +5 volt supply and dissipates less than 20 mW.

The DAC8408 is manufactured using PMI’s highly stable,

thin-film resistors on an advanced oxide-isolated, silicon-gate,

CMOS process. PMI’s improved latch-up resistant design elimi-

nates the need for external protective Schottky diodes.

ORDERING INFORMATION

1

Temperature

Package

Model

INL

DNL

Range

Description

DAC8408GP

± 1/4 LSB ± 1/2 LSB 0°C to +70°C

28-Pin Plastic DIP

DAC8408ET

± 1/4 LSB ± 1/2 LSB –40°C to +85°C

28-Pin Cerdip

DAC8408AT

2

± 1/4 LSB ± 1/2 LSB –55°C to +125°C 28-Pin Cerdip

DAC8408FT

± 1/2 LSB ± 1 LSB

–40

°C to +85°C

28-Pin Cerdip

DAC8408BT

2

± 1/2 LSB ± 1 LSB

–55

°C to +125°C 28-Pin Cerdip

DAC8408FPC

3

± 1/2 LSB ± 1 LSB

–40

°C to +85°C

28-Contact PLCC

DAC8408FS

± 1/2 LSB ± 1 LSB

–40

°C to +85°C

28-Pin SOL

DAC8408FP

± 1/2 LSB ± 1 LSB

–40

°C to +85°C

28-Pin Plastic DIP

NOTES

in cerdip, plastic DIP, and TO-can packages. For outline information see Pack-

age Information section.

part number. Consult factory for 883 data sheet.

your local sales office.

FEATURES

Four DACs in a 28 Pin, 0.6 Inch Wide DIP or 28-Pin JEDEC

Plastic Chip Carrier

1/4 LSB Endpoint Linearity

Guaranteed Monotonic

DACs Matched to Within 1%

Microprocessor Compatible

Read/Write Capability (with Memory)

TTL/CMOS Compatible

Four-Quadrant Multiplication

Single-Supply Operation (+5 V)

Low Power Consumption

Latch-Up Resistant

Available In Die Form

APPLICATIONS

Voltage Set Points in Automatic Test Equipment

Systems Requiring Data Access for Self-Diagnostics

Industrial Automation

Multichannel Microprocessor-Controlled Systems

Digitally Controlled Op Amp Offset Adjustment

Process Control

Digital Attenuators

GENERAL DESCRIPTION

The DAC8408 is a monolithic quad 8-bit multiplying digital-to-

analog CMOS converter. Each DAC has its own reference input,

feedback resistor, and onboard data latches that feature

read/write capability. The readback function serves as memory

for those systems requiring self-diagnostics.

FUNCTIONAL BLOCK DIAGRAM

DAC8408

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Tel: 617/329-4700

Fax: 617/326-8703