DAC161P997CISQ/NOPB 16-Bit Programmable Loop-Powered 4-20mA DAC High-Accuracy Low-Power Digital Calibration HART Compatible Robust ±40V Fault Protection Industrial Automation Solution

DAC161P997CISQ/NOPB 16-Bit Programmable Loop-Powered 4-20mA DAC High-Accuracy Low-Power Digital Calibration HART Compatible Robust ±40V Fault Protection Industrial Automation Solution

Features

16-Bit Linearity

Single-Wire Interface (SWlF), 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 Components

Simple Interface to HART Modulator

Small Package: WQFN-16 (4 x 4 mm, 0.5 mmPitch)

Key Specifications

  -Output Current TempCo: 29 ppmFS/°C (Max)

  -Long-Term Output Current Drift: 90 ppmFS(TyP)

  -INL: 3.3/-2.1 μA(Max)

  -Total Supply Current: 190 μA (Max)

Application

Two-Wire,4-20 mA Current Loop Transmitter

Industrial Process Control

Actuator Control

Factory Automation

Building Automation
Precision instruments

Data Acquisition Systems
Test Systems

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 mA current loop.lt offers 16-bit accuracy with a low output current temperature coefficient(29ppm/C)and excellent long-term output current drift (90 ppmFS) while consuming less than 190 μA.

The data link to the DAC161P997 is a Single Wire Interface(SWF)which allows sensor data to be transferred in digital format over an isolation boundary usingja single isolation component. The DAC161P997'S;digital input is compatible with standard isolation transformers and opto-couplers. Error detection and handshaking features within the SWF protocolensure error free communication 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 mA current loop. This combination of specifications andfeatures makes the DAC161P997idealfor2-and4-wire industrial transmitters.

The DAC161P997 is available in a 16-lead WQFN package and is specified over the extended industrial temperature range of -40'C to 105°C.

INFORMATION

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