DAC161S997

Product Folder Sample & Buy Technical Documents Tools & Software Support & Community DAC161S997 SNAS621A – JUNE 2013 – REVISED DECEMBER 2014 DAC161S997 16-Bit SPI-Programmable DAC for 4-20 mA Loops 1 Features 1 16-Bit Resolution Very-Low Supply Current of 100 µA 5 ppmFS/°C Gain Error Pin-Programmable Power-Up Condition Loop-Error Detection and Reporting Programmable Output-Current Error Levels Simple HART Modulator Interfacing Highly Integrated Feature Set in Small Footprint WQFN-16 (4- × 4-mm, 0.5-mm Pitch) 2 Applications Two-Wire 4- to 20-mA Current-Loop Transmitter Loop-Power Transmitters Industrial Process Control Actuator Control 3 Description The DAC161S997 is a very low power 16-bit ΣΔ digital-to-analog converter (DAC) for transmitting an analog output current over an industry standard 4-20 mA current loop. The DAC161S997 has a simple 4wire SPI for data transfer and configuration of the DAC functions. To reduce power and component count in compact loop-powered applications, the DAC161S997 contains an internal ultra-low power voltage reference and an internal oscillator. The low power consumption of the DAC161S997 results in additional current being available for the remaining portion of the system. The loop drive of the DAC161S997 interfaces to a Highway Addressable Remote Transducer (HART) modulator, allowing injection of FSK modulated digital data into the 4-20 mA current loop. This combination of specifications and features makes the DA...