Low-Power, Rail-to-Rail Output, 16-Bit Serial Input

DIGITAL-TO-ANALOG CONVERTER

APPLICATIONS

q PROCESS CONTROL

q DATA ACQUISITION SYSTEMS

q CLOSED-LOOP SERVO-CONTROL

q PC PERIPHERALS

q PORTABLE INSTRUMENTATION

q PROGRAMMABLE ATTENUATION

DESCRIPTION

The DAC8531 is a low-power, single, 16-bit buffered voltage

output Digital-to-Analog Converter (DAC). Its on-chip preci-

sion output amplifier allows rail-to-rail output swing to be

achieved. The DAC8531 uses a versatile three-wire serial

interface that operates at clock rates up to 30MHz and is

compatible with standard SPI™, QSPI™, Microwire™, and

Digital Signal Processor (DSP) interfaces.

The DAC8531 requires an external reference voltage to set

the output range of the DAC. The DAC8531 incorporates a

power-on reset circuit that ensures that the DAC output

powers up at 0V and remains there until a valid write takes

place to the device. The DAC8531 contains a power-down

feature, accessed over the serial interface, that reduces the

current consumption of the device to 200nA at 5V.

The low power consumption of this part in normal operation

makes it ideally suited to portable battery-operated equip-

ment. The power consumption is 2mW at 5V reducing to 1

µW

in power-down mode.

The DAC8531 is available in both MSOP-8 and 3x3 SON-8

(same size as QFN) packages.

FEATURES

q microPower OPERATION: 250

q POWER-ON RESET TO ZERO

q POWER SUPPLY: +2.7V to +5.5V

q ENSURED MONOTONIC BY DESIGN

q SETTLING TIME: 10

q LOW-POWER SERIAL INTERFACE WITH

SCHMITT-TRIGGERED INPUTS

q ON-CHIP OUTPUT BUFFER AMPLIFIER,

RAIL-TO-RAIL OPERATION

q SYNC INTERRUPT FACILITY

q PACKAGES: MSOP-8 and 3x3 SON-8 (same

size as QFN)

Shift Register

16

DAC Register

16

16-Bit DAC

Ref (+)

Power-Down

Control Logic

Resistor

Network

V

DD

GND

V

OUT

V

FB

SYNC

V

REF

SCLK

D

IN

DAC8531

SBAS192B – MARCH 2001 – REVISED JUNE 2003

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Copyright © 2001-2003, Texas Instruments Incorporated

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

PRODUCTION DATA information is current as of publication date.

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standard warranty. Production processing does not necessarily include

testing of all parameters.

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