GENERAL DESCRIPTION:

The AD5025/AD5045/AD5065 are low power, dual 12-/14-/16-bitbuffered voltage output nanoDAC® DACs offering relative accuracyspecifications of ±1 LSB INL with individual reference pins, andcan operate from a single 4.5 V to 5.5 V supply. The AD5025/AD5045/AD5065 also offer a differential accuracy specification of±1 LSB. The parts use a versatile 3-wire, low power Schmitttrigger serial interface that operates at clock rates up to 50 MHzand is compatible with standard SPI®, QSPI™, MICROWIRE™,and DSP interface standards. The reference for the AD5025/AD5045/AD5065 are supplied from an external pin and a refer-ence buffer is provided on chip. The AD5025/AD5045/AD5065incorporate a power-on reset circuit that ensures the DAC outputpowers up zero scale or midscale and remains there until a validwrite takes place to the device. The AD5025/AD5045/AD5065contain a power-down feature that reduces the current consumption of the device to typically 400 nA at 5 V and provides softwareselectable output loads while in power-down mode. The parts areput into power-down mode over the serial interface. Total unadjusted error for the parts is <2.5 mV. The parts exhibit very lowglitch on power-up. The outputs of all DACs can be updatedsimultaneously using the LDAC function, with the addedfunctionality of user-selectable DAC channels to simultaneouslyupdate. There is also an asynchronous CLR that clears all DACsto a software-selectable code—0 V, midscale, or full scale. Theparts also feature a power-down lockout pin, PDL, which can beused to prevent the DAC from entering power-down under anycircumstances over the serial interface. 

FEATURES:

Low power dual 12-/14-/16-bit DAC, ±1 LSB INL

Individual voltage reference pins

Rail-to-rail operation

4.5 V to 5.5 V power supply

Power-on reset to zero scale or midscale

Power down to 400 nA @ 5 V

3 power-down functions

Per channel power-down

Low glitch upon power-up

Hardware power-down lockout capability

Hardware LDAC with software LDAC override function

CLR function to programmable code

SDO daisy-chaining option

14-lead TSSOP

APPLICATIONS:

Process controls

Data acquisition systems

Portable battery-powered instruments

Digital gain and offset adjustment

Programmable voltage and current sources

Programmable attenuators