General Description

The MAX541/MAX542 are serial-input, voltage-output,

16-bit digital-to-analog converters (DACs) that operate

from a single +5V supply. They provide 16-bit perfor-

mance (±1LSB INL and DNL) over temperature without

any adjustments. The DAC output is unbuffered, result-

ing in a low supply current of 0.3mA and a low offset

error of 1LSB.

tion, matched scaling resistors are provided in the

MAX542 for use with an external precision op amp

swing. The MAX542 also includes Kelvin-sense con-

nections for the reference and analog ground pins to

reduce layout sensitivity.

A 16-bit serial word is used to load data into the DAC

latch. The 10MHz, 3-wire serial interface is compatible

with SPI™/QSPI™/MICROWIRE™, and it also interfaces

directly with optocouplers for applications requiring isola-

tion. A power-on reset circuit clears the DAC output to 0V

(unipolar mode) when power is initially applied.

The MAX541 is available in 8-pin plastic DIP and SO

packages. The MAX542 is available in 14-pin plastic

DIP and SO packages.

Applications

High-Resolution Offset and Gain Adjustment

Industrial Process Control

Automated Test Equipment

Data-Acquisition Systems

Features

o Full 16-Bit Performance Without Adjustments

o +5V Single-Supply Operation

o Low Power: 1.5mW

o 1µs Settling Time

o Unbuffered Voltage Output Directly Drives 60kΩ

Loads

o SPI/QSPI/MICROWIRE-Compatible Serial Interface

o Power-On Reset Circuit Clears DAC Output to 0V

(unipolar mode)

o Schmitt Trigger Inputs for Direct Optocoupler

Interface

+5V, Serial-Input, Voltage-Output, 16-Bit DACs

________________________________________________________________ Maxim Integrated Products

1

14

13

12

11

10

9

8

1

2

3

4

5

6

7

INV

DGND

LDAC

AGNDS

AGNDF

OUT

RFB

TOP VIEW

MAX542

DIN

N.C.

SCLK

CS

REFF

REFS

DIP/SO

DIN

REF

SCLK

CS

1

2

8

7

DGND

AGND

OUT

MAX541

3

4

6

5

DIP/SO

General Description

16-BIT DAC

16-BIT DATA LATCH

SERIAL INPUT REGISTER

CONTROL

LOGIC

MAX542

REFF

REFS

CS

LDAC

DIN

SCLK

AGNDS

AGNDF

OUT

INV

RFB

DGND

Functional Diagrams

19-1082; Rev 2; 12/99

PART

MAX541ACPA

MAX541BCPA

MAX541ACSA

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

8 SO

Ordering Information

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

For small orders, phone 1-800-835-8769.

SPI and QSPI are trademarks of Motorola, Inc.

MICROWIRE is a trademark of National Semiconductor Corp.

MAX541BCSA

0°C to +70°C

8 SO

INL

(LSB)

±1

±2

±1

±2

Ordering Information continued at end of data sheet.

MAX541CCPA

0°C to +70°C

8 Plastic DIP

±4

MAX541CCSA

0°C to +70°C

8 SO

±4

Functional Diagrams continued at end of data sheet.