DAC161P997 Datasheet | Texas Instruments

Features - 1 16-Bit Linearity - Single-Wire Interface (SWIF), with Handshake - Digital Data Transmission (No Loss of Fidelity) - Pin Programmable Power-Up Condition - Self Adjusting to Input Data Rate - Loop Error Detection and Rreporting - Programmable Output Current Error Level - No External Precision ponents - Simple Interface to HART Modulator - Small Package: WQFN-16 (4 x 4 mm, 0.5 mm Pitch) - Key Specifications - Output Current Temp Co: 29 ppm FS/°C (Max) - Long-Term Output Current Drift: 90 ppm FS (Typ) - INL: 3.3/- 2.1 µA(Max) - Total Supply Current: 190 µA (Max) 2 Application - Two-Wire, 4-20 m A Current Loop Transmitter - Industrial Process Control - Actuator Control - Factory Automation - Building Automation - Precision Instruments - Data Acquisition Systems - Test Systems 3 Description The DAC161P997 is a 16-bit ∑Δ digital-to-analog converter (DAC) for transmitting an analog output current over an industry standard 4-20 m A current loop. It offers 16-bit accuracy with a low output current temperature coefficient (29 ppm/°C) and excellent long-term output current drift (90 ppm FS) while consuming less than 190 µA. The data link to the DAC161P997 is a Single Wire Interface (SWIF) which allows sensor data to be transferred in digital format over an isolation boundary using a single isolation ponent. The DAC161P997’s digital input is patible with standard isolation transformers and opto-couplers. Error detection and handshaking features within the SWIF protocol ensure error free munication across the isolation boundary. For applications where isolation is not required, the DAC161P997 interfaces directly to a microcontroller. The loop drive of the DAC161P997 interfaces to a HART (Highway Addressable Remote Transducer) modulator, allowing injection of FSK modulated digital data into the 4-20 m A current loop. This bination of specifications and features makes the DAC161P997 ideal for 2- and 4-wire industrial transmitters. The DAC161P997 is available in a 16- lead WQFN...