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Production Data

January 1997 Rev 2

10-Bit Digital-to-Analogue Converter

Description

The WM5615 is a 10-bit voltage output digital-to-

analogue converter (DAC) with a buffered reference input

(high impedance). The DAC produces a maximum output

voltage that is twice the reference voltage and the DAC is

monotonic. The device is simple to use, running from a

single supply of 5V. A power-on reset function is

incorporated to ensure repeatable start-up conditions.

Digital control of the WM5615 is over a 3-wire serial bus

that is CMOS compatible and easily interfaced to industry

standard microprocessor and microcontroller devices. The

device receives a 16-bit data word to produce the

analogue output. The digital inputs feature Schmitt

triggers for high noise immunity. Digital communication

ards.

The 8-terminal small-outline D package allows digital

control of analogue functions in space-critical applications.

Features

•

10-bit CMOS voltage output DAC in an

8-terminal package

•

5V single supply operation

•

3-wire serial interface

•

High-impedance reference input

•

Maximum voltage output

twice reference

input voltage

•

Internal power-on reset

•

Low power consumption ... 1.75mW max

•

877kHz update rate

•

Setting time to 0.5 LSB ... 12.5

µµµµµs typical

•

Monotonic over temperature

•

Pin compatible with the Maxim MAX515

Applications

•

Battery-powered test Instruments

•

Digital offset and gain adjustment

•

Battery-operated/remote industrial controls

•

Machine and motion control devices

•

Cellular telephones

Wolfson Microelectronics

© 1996 Wolfson Microelectronics

VDD

16-BIT SHIFT REGISTER

CS

SCLK

DIN

DOUT

(LSB)

2

Xs

4

DUMMY

BITS

(MSB)

CONTROL

LOGIC

POWER-ON

RESET

RESISTOR

STRING

DAC

VOUT

10-BIT DAC REGISTER

Block Diagram

R

R

WM5615

5

SPI and QSPI are trademarks of Motorola, Inc. Microwire is a trademark of

National Semiconductor Corp.

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-

Production Data data sheets contain

final

specifications current on publication date.

Supply of products conforms to Wolfson Mi-

croelectronics standard terms and conditions.

AGND

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REFIN