DEVICE

TEMP. RANGE

PACKAGE

WM5628CN

16 pin plastic DIP

WM5628CDW

16 pin wide-bodied plastic SO

WM5628IN

16 pin plastic DIP

WM5628IDW

16 pin wide-bodied plastic SO

WM5628LCN

16 pin plastic DIP

WM5628LCDW

16 pin wide-bodied plastic SO

WM5628LIN

16 pin plastic DIP

WM5628LIDW

16 pin wide-bodied plastic SO

Lutton Court, Bernard Terrace, Edinburgh EH8 9NX, UK

Tel: +44 (0) 131 667 9386

Fax: +44 (0) 131 667 5176

email: admin@wolfson.co.uk

www: http://www.wolfson.co.uk

Description

WM5628L and WM5628 are Octal 8-bit digital to analogue

converters (DAC) controlled via a serial interface. Each

DAC's output voltage range is programmable for either x1

or x 2 its reference input voltage, allowing near rail to rail

operation for the x 2 output range. High impedance

buffered voltage reference inputs are provided for each

group of four DACs. WM5628L operates on a single

supply voltage of 3 V while WM5628 operates on 5 V.

WM5628/L interfaces to all popular microcontrollers and

microprocessors via a three wire serial interface with CMOS

compatible, schmitt trigger, digital inputs. An 12 bit

command word comprises 3 DAC select bits, an output

range selection bit and 8-bits of data.

Individual or all DAC outputs are changed using

WM5628/L's double buffered DAC registers and the

separate LOAD and LDAC inputs. DAC outputs are

updated simultaneously by writing a complete set of new

values and then pulsing the LDAC input.

The DAC outputs are optimised for single supply

operation and driving ground referenced loads.

An internal power-on-reset function sets the DAC's input

codes to zero at power up.

Ideal in space critical applications WM5628/L is available

in wide-bodied and DIP packages for commercial (0

•

Eight 8-bit voltage output DAC's

•

Three wire serial interface

•

Programmable x1 or x 2 output range.

•

Power-on-reset sets outputs to zero

•

Buffered voltage reference inputs

•

Simultaneous DAC output update

Key Specifications

•

Single supply operation:

WM5628L

: 3 V

WM5628

: 5 V

•

•

•

Guaranteed monotonic output

Applications

•

Programmable d.c. voltage sources

•

Digitally controlled attenuator/amplifier

•

Signal synthesis

•

Mobile communications

•

Automatic test equipment

•

Process control

3 & 5V Octal 8-Bit Voltage Output DAC

with Serial Interface

Features

Wolfson Microelectronics

Production Data

Sept. 1996 Rev 2

© 1996 Wolfson Microelectronics

Production Data data sheets contain

final specifications current on publication

date. Supply of products conforms to

Wolfson Microelectronics standard terms

and conditions

Pin Configuration

Ordering Information

Top View

16 pin N and DW packages

1

2

3

4

5

6

7

89

10

11

12

13

14

15

16

DACB

DACA

GND

Data

DACE

CLK

DACF

DAC G

DACH

Ref2

LDAC

Load

Ref1

DACD

DACC

WM5628L, WM5628