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 DAC8501 is a low-power, single, 16-bit buffered voltage

output Digital-to-Analog Converter (DAC) optimized for multi-

plying operation. Its on-chip precision output amplifier allows

rail-to-rail output swing to be achieved. The DAC8501 uses a

versatile 3-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 DAC8501 requires an external reference voltage to set

the output range of the DAC. The DAC8501 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 DAC8501 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 1.2mW at 5V reducing to

1

µW in power-down mode.

The DAC8501 is available in an MSOP-8 package.

FEATURES

q microPOWER OPERATION: 250

µA at 5V

q MULTIPLYING-MODE BANDWIDTH: 350kHz

q POWER-ON RESET TO ZERO

q POWER SUPPLY: +2.7V to +5.5V

q ENSURED MONOTONIC BY DESIGN

q SETTLING TIME: 10

µs to ±0.003% FSR

q LOW-POWER SERIAL INTERFACE WITH

SCHMITT-TRIGGERED INPUTS

q ON-CHIP OUTPUT BUFFER AMPLIFIER,

RAIL-TO-RAIL OPERATION

q SYNC INTERRUPT FACILITY

q MSOP-8 PACKAGE

SPI and QSPI are registered trademarks of Motorola.

Microwire is a registered trademark of National Semiconductor.

DAC8501

SBAS212A – APRIL 2001 – REVISED FEBRUARY 2003

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.

Products conform to specifications per the terms of Texas Instruments

standard warranty. Production processing does not necessarily include

testing of all parameters.

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