WM2619

12-bit Parallel Input Voltage Output DAC

Production Data, June 1999, Rev 1.0

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.

Masterrev1.0a.doc June 17, 1999 10:52

©1999 Wolfson Microelectronics Ltd

.

FEATURES

•

12-bit voltage output DAC

•

Single supply 2.7V to 5.5V operation

•

DNL ±0.4 LSB, INL ±1.5 LSB

•

Settling time 1µs typical

•

Low power consumption

-

8mW typical in slow mode - 5V supply

-

4.3mW typical in fast mode - 3V supply

•

Power down mode

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

WM2619CDT

0° to 70°C

20-pin TSSOP

WM2619IDT

-40° to 85°C

20-pin TSSOP

DESCRIPTION

The WM2619 is a 12-bit voltage output, resistor string, digital-to-

analogue converter. A hardware controlled power down mode is

provided that reduces power consumption to 50nW. In normal

operation the device dissipates 8mW at 5V or 4.3mW at 3V.

The device has been designed to interface efficiently to industry

standard microprocessors and DSPs.

Excellent performance is delivered with a typical DNL of 0.4 LSBs

and a settling time of 1

µs. The output stage is buffered by a x2

gain near rail-to-rail amplifier, which features a Class A output

stage. The 12 data bits are double-buffered enabling the output to

be asynchronously updated under hardware control.

The device is available in a 20-pin TSSOP package. Commercial

temperature (0° to 70°C) and Industrial temperature (-40° to 85°C)

variants are supported.

BLOCK DIAGRAM

TYPICAL PERFORMANCE

data

(13) OUT

REFIN(12)

POWER-ON

RESET

D[0-11]

(19,20, 1-10)

NWE (17)

(14)

GND

VDD

(11)

POWERDOWN

CONTROL

REFERENCE

INPUT BUFFER

WM2619

X1

X2

DAC

OUTPUT

BUFFER

NCS (18)

12-BIT

DAC

LATCH

12-BIT

INPUT

REGISTER

(15)

NPD

(16)

NLDAC

VDD = 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