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

For small orders, phone 408-737-7600 ext. 3468.

_______________General Description

The MAX551/MAX552 are 12-bit, current-output, 4-quad-

rant multiplying digital-to-analog converters (DACs).

These devices are capable of providing unipolar or

bipolar outputs when operating from either a single +5V

(MAX551) or +3V (MAX552) power supply. An internal

power-on-reset circuit clears all DAC registers on

power-up, setting the DAC output voltage to 0V.

The SPI™/QSPI™ and Microwire™-compatible 3-wire

serial interface saves board space and reduces power

dissipation compared with parallel-interface devices.

The MAX551/MAX552 feature double-buffered interface

logic with a 12-bit input register and a 12-bit DAC regis-

ter. Data in the DAC register sets the DAC output volt-

age. Data is loaded into the input register via the serial

interface. The LOAD input transfers data from the input

register to the DAC register, updating the DAC output

voltage.

The MAX551/MAX552 are available in an 8-pin DIP

package or a space-saving 10-pin µMAX package. The

µMAX package provides an asynchronous clear (CLR)

input that clears all DAC registers when pulled to GND,

setting the output voltage to 0V.

________________________Applications

Automatic Calibration

Gain Adjustment

Transducer Drivers

Process-Control I/O Boards

Digitally Controlled Filters

Motion-Controlled Systems

µP-Controlled Systems

Programmable Amplifiers/Attenuators

____________________________Features

o Single-Supply Operation:

+4.5V to +5.25V (MAX551)

+2.7V to +3.6V (MAX552)

o 12.5MHz 3-Wire Serial Interface

o SPI/QSPI and Microwire Compatible

o Power-On Reset Clears DAC Output to Zero

o Asynchronous Clear Input Clears DAC Output

to Zero

o Voltage Mode or Bipolar Mode Operation with

a Single Power Supply

o Schmitt-Trigger Digital Inputs for Direct

Optocoupler Interface

o 0.4µA Supply Current

o 10-Pin µMAX Package

+3V/+5V, 12-Bit, Serial, Multiplying DACs

in 10-Pin µMAX Package

________________________________________________________________

Maxim Integrated Products

1

1

2

3

4

5

10

9

8

7

6

RFB

REF

CLR

SCLK

GND

AGND

OUT

MAX551

MAX552

µMAX

TOP VIEW

DIN

LOAD

SCLK

DIN

LOAD

1

2

8

7

RFB

REF

GND

OUT

DIP

3

4

6

5

MAX551

MAX552

19-1260; Rev 0; 10/97

PART

MAX551ACPA

MAX551BCPA

MAX551ACUB

0°C to +70°C

0°C to +70°C

0°C to +70°C

TEMP. RANGE

PIN-

PACKAGE

8 Plastic DIP

8 Plastic DIP

10 µMAX

______________Ordering Information

Ordering Information continued at end of data sheet.

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

MAX551BCUB

MAX551AEPA

MAX551BEPA

-40°C to +85°C

-40°C to +85°C

0°C to +70°C

10 µMAX

8 Plastic DIP

8 Plastic DIP

MAX551AEUB

-40°C to +85°C

10 µMAX

MAX551BEUB

-40°C to +85°C

10 µMAX

LINEARITY

(LSB)

±1/2

±1

±1/2

±1

±1/2

±1

±1/2

±1

_________________Pin Configurations

12-BIT

D/A CONVERTER

RFB

OUT

AGND*

CLR*

LOAD

REF

SCLK

GND

*

µMAX PACKAGE ONLY

12-BIT

DAC REGISTER

DIN

12-BIT

SHIFT REGISTER

POWER-ON

RESET

MAX551

MAX552

________________Functional Diagram