__________________General Description

The +3V MAX5251 combines four low-power, voltage-

output, 10-bit digital-to-analog converters (DACs) and

four precision output amplifiers in a space-saving, 20-

pin package. In addition to the four voltage outputs,

each amplifier’s negative input is also available to the

user. This facilitates specific gain configurations, remote

sensing, and high output drive capacity, making the

MAX5251 ideal for industrial-process-control applica-

tions. Other features include software shutdown, hard-

ware shutdown lockout, an active-low reset that clears

all registers and DACs to zero, a user-programmable

logic output, and a serial-data output.

Each DAC has a double-buffered input organized as an

input register followed by a DAC register. A 16-bit serial

word loads data into each input/DAC register. The

3-wire serial interface is compatible with SPI™/QSPI™

and Microwire™. It allows the input and DAC registers to

be updated independently or simultaneously with a sin-

gle software command. All logic inputs are TTL/CMOS-

logic compatible.

________________________Applications

Digital Offset and Gain Adjustment

Microprocessor-Controlled Systems

Industrial Process Controls

Automatic Test Equipment

Remote Industrial Controls

Motion Control

______________________________Features

o Four 10-Bit DACs with Configurable

Output Amplifiers

o +3.0V to +3.6V Single-Supply Operation

o Low Supply Current: 0.8mA Normal Operation

3µA Shutdown Mode

o Available in 20-Pin SSOP

o Power-On Reset Clears all Registers and

DACs to Zero

o SPI/QSPI and Microwire Compatible

o Simultaneous or Independent Control of DACs

via 3-Wire Serial Interface

o User-Programmable Digital Output

o Schmitt-Trigger Digital Inputs for Direct

Optocoupler Interface

o 12-Bit Upgrade Available: MAX5253

+3V, Quad, 10-Bit Voltage-Output DAC

with Serial Interface

________________________________________________________________

Maxim Integrated Products

1

MAX5251

OUTA

FBA

FBB

FBC

FBD

DAC A

DAC B

DAC C

DAC D

REFAB

DAC

REGISTER A

DECODE

CONTROL

INPUT

REGISTER A

DAC

REGISTER B

INPUT

REGISTER B

DAC

REGISTER C

INPUT

REGISTER C

DAC

REGISTER D

INPUT

REGISTER D

16-BIT

SHIFT

REGISTER

SR

CONTROL

LOGIC

OUTPUT

CS DIN SCLK

OUTB

OUTC

OUTD

DOUT

PDL

CL

AGND

DGND

UPO

REFCD

_________________________________________________________________________Functional Diagram

19-1172; Rev 0; 12/96

PART

MAX5251ACPP

MAX5251BCPP

0°C to +70°C

0°C to +70°C

TEMP. RANGE

PIN-PACKAGE

20 Plastic DIP

20 Plastic DIP

_________________Ordering Information

Ordering Information continued on last page.

Pin Configuration appears at end of data sheet.

For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800

INL

(LSB)

±1/2

±1

SPI and QSPI are trademarks of Motorola, Inc. Microwire is a trademark of National Semiconductor Corp.

MAX5251ACAP

MAX5251BCAP

0°C to +70°C

0°C to +70°C

20 SSOP

20 SSOP

±1/2

±1