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WM2613

Byte-wide Parallel Input, 12-bit Voltage Output DAC

Wolfson Microelectronics plc 

WM2613

Byte-wide Parallel Input, 12-bit Voltage Output DAC

Production Data, June 1999, Rev 1.0

FEATURES

• Dual 12-bit voltage output DAC

• Dual supply 2.7V to 5.5V operation

• DNL ±0.4 LSB, INL ±1.5 LSB

• Programmable settling time 1µs or 3µs typical

• 8-bit micro controller compatible interface

• Power down mode (10nA)

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

DESCRIPTION

The WM2613 is a 12-bit voltage output, resistor string, digital-to-

analogue converter. The DAC can be powered down under

software or hardware control, reducing power consumption to

10nA.

The device has an 8-bit microcontroller compatible parallel

interface. The eight data LSBs, the four data MSBs, and the three

control bits are written using three different addresses.

Excellent performance is delivered with a typical DNL of 0.4 LSBs.

The output stage is buffered by a x2 gain near rail-to-rail amplifier,

which features a Class A output stage (slow mode, class AB). The

settling time of the DAC is software programmable to allow the

designer to optimize speed versus power dissipation.

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.

DEVICE

WM2613CDT

WM2613IDT

TEMP. RANGE

0° to 70°C

-40° to 85°C

PACKAGE

20-pin TSSOP

20-pin TSSOP

BLOCK DIAGRAM

REFIN(12)

SPD (9)

NPD (15)

A[0-1] (8,7)

NCS (18)

NWE (17)

PARALLEL

INTERFACE

AND

CONTROL

LOGIC

D[0-7]

(19,20, 1-6)

POWER-ON

RESET

POWERDOWN/

SPEED

CONTROL

3-BIT

CONTROL

LATCH

4-BIT DAC

MSW

HOLDING

LATCH

8-BIT DAC

LSW

HOLDING

LATCH

DV DD

(10)

AVDD

(11)

REFERENCE

INPUT BUFFER

X1

12-BIT DAC

LATCH

DAC

OUTPUT

BUFFER

X2

(13) OUT

(14)

GND

(16)

NLDAC

WM2613

TYPICAL PERFORMANCE

1

0.8

0.6

0.4

0.2

0

-0.2

-0.4

-0.6

-0.8

-1

0

AVDD = DVDD = 5V, VREF = 2.048V, Speed = Fast mode, Load = 10k/100pF

512

1024

1536

2048

2559

3071

DIGITAL CODE

3583

4095

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.

Master rev 1.0.doc June 17, 1999 14:12

©1999 Wolfson Microelectronics Ltd.

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