WM2616

12-bit Serial Input Voltage Output DAC

Production Data June 1999, Rev1.0

WOLFSON MICROELECTRONICS LTD

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

Tel: +44 (0) 131 667 9386

Fax: +44 (0) 131 667 5176

Email: sales@wolfson.co.uk

http://www.wolfson.co.uk

Production Data Datasheets contain final

specifications current on publication date.

Supply of products conforms to Wolfson

Microelectronics’ Terms and conditions.

2616 master.doc June 17, 1999 14:13

©1999 Wolfson Microelectronics Ltd

.

FEATURES

•

12-bit voltage output DAC

•

Single supply from 2.7V to 5.5V

•

DNL

±±0.5 LSB, INL ±±1.9 LSB

•

Very low power consumption (3V supply):

-

900

µµW, slow mode

-

2.1mW, fast mode

•

TMS320, (Q)SPI

™

™, and Microwire™

™ compatible serial

interface

•

Programmable settling time of 4

µµs or 12µµs typical

•

High impedance reference input buffer

APPLICATIONS

•

Battery powered test instruments

•

Digital offset and gain adjustment

•

Battery operated/remote industrial controls

•

Machine and motion control devices

•

Wireless telephone and communication systems

•

Speech synthesis

•

Arbitrary waveform generation

ORDERING INFORMATION

DEVICE

TEMP. RANGE

PACKAGE

WM2616CD

0° to 70°C

8-pin SOIC

WM2616ID

-40° to 85°C

8-pin SOIC

DESCRIPTION

The WM2616 is a 12-bit voltage output, resistor string digital-to-

analogue converter that can be powered down under software

control. Power down reduces current consumption to 10nA.

The device has been designed to interface efficiently to industry

standard microprocessors and DSPs, including the TMS320

family. The WM2616 is programmed with a 16-bit serial word

comprising 4 control bits and 12 data bits.

Excellent performance is delivered with a typical DNL of 0.5LSBs.

The settling time of the DAC is programmable to allow the designer

to optimize speed versus power dissipation. The output stage is

buffered by a x2 gain rail-to-rail amplifier, which features a Class

AB output stage.

The device is available in an 8-pin SOIC package. Commercial

temperature (0

° to 70°C) and Industrial temperature (-40° to 85°C)

variants are supported.

BLOCK DIAGRAM

TYPICAL PERFORMANCE

(7) OUT

12-BIT

DAC

LATCH

REFIN(6)

POWER-ON

RESET

DIN (1)

SCLK (2)

FS (4)

(5)

AGND

VDD

(8)

POWERDOWN/

SPEED

CONTROL

2-BIT

CONTROL

LATCH

REFERENCE

INPUT BUFFER

WM2616

16-BIT

SHIFT

REGISTER

AND

CONTROL

LOGIC

data

X1

X2

DAC

OUTPUT

BUFFER

NCS (3)

AVDD = DVDD = 5V, V

-1

-0.8

-0.6

-0.4

-0.2

0

0.2

0.4

0.6

0.8

1

0

512

1024

1536

2048

2559

3071

3583

4095

DIGITAL CODE