APPLICATIONS

q PORTABLE BATTERY-POWERED

INSTRUMENTS

q DIGITAL GAIN AND OFFSET

ADJUSTMENT

q PROGRAMMABLE VOLTAGE AND

CURRENT SOURCES

Low-Power, Rail-to-Rail Output, 12-Bit Serial Input

DIGITAL-TO-ANALOG CONVERTER

DESCRIPTION

The DAC7512 is a low-power, single, 12-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 DAC7512 uses a versatile three-wire serial

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

DSP interfaces.

The reference for the DAC7512 is derived from the power

supply, resulting in the widest dynamic output range possible.

The DAC7512 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 in the device. The

DAC7512 contains a power-down feature, accessed over the

serial interface, that can reduce the current consumption of

the device to 50nA 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 0.7mW at 5V reducing to

1µW in power-down mode.

The DAC7512 is available in a SOT23-6 package and an

MSOP-8 package.

DAC7512

DAC7512

FEATURES

q microPOWER OPERATION: 135µA at 5V

q POWER-DOWN: 200nA at 5V, 50nA at 3V

q POWER SUPPLY: +2.7V to +5.5V

q TESTED MONOTONIC BY DESIGN

q POWER-ON RESET TO 0V

q THREE POWER-DOWN FUNCTIONS

q LOW POWER SERIAL INTERFACE WITH

SCHMITT-TRIGGERED INPUTS

q ON-CHIP OUTPUT BUFFER AMPLIFIER,

RAIL-TO-RAIL OPERATION

q SYNC INTERRUPT FACILITY

q SOT23-6 AND MSOP-8 PACKAGES

Power-On

Reset

DAC

Register

REF (+) REF (–)

12-Bit

DAC

Output

Buffer

Input

Control

Logic

Power-Down

Control Logic

Resistor

Network

SYNC SCLK D

IN

V

DD

GND

V

OUT

SPI and QSPI are registered trademarks of Motorola.

Microwire is a registered trademark of National Semiconductor.

DAC7512

SBAS156B – JULY 2002

www.ti.com

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.

Copyright © 2002, 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.