_______________General Description

The MAX531/MAX538/MAX539 are low-power, voltage-

output, 12-bit digital-to-analog converters (DACs) speci-

fied for single +5V power-supply operation. The MAX531

can also be operated with ±5V supplies. The

MAX538/MAX539 draw only 140µA, and the MAX531

(with internal reference) draws only 260µA. The

MAX538/MAX539 come in 8-pin DIP and SO packages,

while the MAX531 comes in 14-pin DIP and SO pack-

ages. All parts have been trimmed for offset voltage,

gain, and linearity, so no further adjustment is necessary.

The MAX538’s buffer is fixed at a gain of +1 and the

MAX539’s buffer at a gain of +2. The MAX531’s internal

op amp may be configured for a gain of +1 or +2, as

well as for unipolar or bipolar output voltages. The

MAX531 can also be used as a four-quadrant multiplier

without external resistors or op amps.

For parallel data inputs, see the MAX530 data sheet.

_______________________Applications

Battery-Powered Test Instruments

Digital Offset and Gain Adjustment

Battery-Operated/Remote Industrial Controls

Machine and Motion Control Devices

Cellular Telephones

___________________________Features

o Operate from Single +5V Supply

o Buffered Voltage Output

o Internal 2.048V Reference (MAX531)

o 140µA Supply Current (MAX538/MAX539)

o INL = ±1/2LSB (max)

o Guaranteed Monotonic over Temperature

o Flexible Output Ranges:

0V to 2.6V (MAX531/MAX538)

o 8-Pin SO/DIP (MAX538/MAX539)

o Power-On Reset

o Serial Data Output for Daisy-Chaining

______________Ordering Information

+5V, Low-Power, Voltage-Output,

Serial 12-Bit DACs

________________________________________________________________

Maxim Integrated Products

1

1

2

3

4

8

7

6

5

VOUT

REFIN

AGND

DOUT

CS

SCLK

DIN

DIP/SO

TOP VIEW

MAX538

MAX539

_________________Pin Configurations

________________Functional Diagram

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

19-0172; Rev 6; 2/97

PART

TEMP. RANGE

PIN-PACKAGE

MAX531ACPD

0°C to +70°C

14 Plastic DIP

MAX531BCPD

0°C to +70°C

14 Plastic DIP

MAX531ACSD

0°C to +70°C

14 SO

MAX531BCSD

0°C to +70°C

14 SO

ERROR

(LSB)

±1/2

±1

±1/2

±1

DAC

DAC REGISTER

(12 BITS)

SHIFT REGISTER

(12 BITS)

4

BITS

CONTROL

LOGIC

POWER-UP

RESET

2.048V

REFERENCE

(MAX531 ONLY)

AGND

SCLK

DIN

(MAX531 ONLY)

REFOUT

REFIN

(MAX531 ONLY)

BIPOFF

RFB

(MAX531

ONLY)

VOUT

DGND

(MAX531

ONLY)

(MAX531

ONLY)

DOUT

(LSB)

(MSB)

CLR

(MAX531

ONLY)

CS

MAX531

MAX538

MAX539

MAX531BC/D

0°C to +70°C

Dice*

±1

Ordering Information continued at end of data sheet.

Pin Configurations continued at end of data sheet.