DAC 芯片~ 16位超级好用,不容错过

DAC8501

SBAS212A – APRIL 2001 – REVISED FEBRUARY 2003

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

DIGITAL-TO-ANALOG CONVERTER

FEATURES

q microPOWER OPERATION: 250µA at 5Vq MULTIPLYING-MODE BANDWIDTH: 350kHzq POWER-ON RESET TO ZERO

q POWER SUPPLY: +2.7V to +5.5Vq ENSURED MONOTONIC BY DESIGNq SETTLING TIME: 10µs to ±0.003% FSRq LOW-POWER SERIAL INTERFACE WITHSCHMITT-TRIGGERED INPUTS

q ON-CHIP OUTPUT BUFFER AMPLIFIER,RAIL-TO-RAIL OPERATIONq SYNC INTERRUPT FACILITYq MSOP-8 PACKAGE

DESCRIPTION

The DAC8501 is a low-power, single, 16-bit buffered voltageoutput Digital-to-Analog Converter (DAC) optimized for multi-plying operation. Its on-chip precision output amplifier allowsrail-to-rail output swing to be achieved. The DAC8501 uses aversatile 3-wire serial interface that operates at clock rates upto 30MHz and is compatible with standard SPI , QSPI ,Microwire , and Digital Signal Processor (DSP) interfaces.The DAC8501 requires an external reference voltage to setthe output range of the DAC. The DAC8501 incorporates apower-on reset circuit that ensures that the DAC output

powers up at 0V and remains there until a valid write takesplace to the device. The DAC8501 contains a power-downfeature, accessed over the serial interface, that reduces thecurrent consumption of the device to 200nA at 5V.The low-power consumption of this part in normal operationmakes it ideally suited to portable battery-operated equip-ment. The power consumption is 1.2mW at 5V reducing to1µW in power-down mode.

The DAC8501 is available in an MSOP-8 package.

SPI and QSPI are registered trademarks of Motorola.

Microwire is a registered trademark of National Semiconductor.

APPLICATIONS

q PROCESS CONTROL

q DATA ACQUISITION SYSTEMSq CLOSED-LOOP SERVO-CONTROLq PC PERIPHERALS

q PORTABLE INSTRUMENTATIONqPROGRAMMABLE ATTENUATION

VFB

VREF

OUT

SCLKDIN

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications ofTexas 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 Instrumentsstandard warranty. Production processing does not necessarily include

testing of all parameters.

Copyright © 2001-2003, Texas Instruments Incorporated