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Product details

Parameters

Resolution (Bits) 16 DAC channels 1 Interface type Single-Wire Output type Buffered Current Features 4-20mA loop transmitter, Low Power Reference: type Ext Architecture Delta-Sigma Rating Catalog Output range (Max) (mA/V) 24 Output range (Min) (mA/V) 0 Operating temperature range (C) -40 to 105 open-in-new Find other Precision DACs (<=10MSPS)

Package | Pins | Size

WQFN (RGH) 16 16 mm² 4 x 4 open-in-new Find other Precision DACs (<=10MSPS)

Features

  • 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 Components
  • Simple Interface to HART Modulator
  • Small Package: WQFN-16 (4 × 4 mm, 0.5 mm Pitch)
  • Key
    • 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

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Description

The DAC161P997 is a 16-bit ΣΔ digital-to-analog converter (DAC) for transmitting an analog output current over an industry standard 4-20 mA 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 ppmFS) 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 component. The DAC161P997’s digital input is compatible with standard isolation transformers and opto-couplers. Error detection and handshaking features within the SWIF protocol ensure 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 and features makes the DAC161P997 ideal for 2- and 4-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.

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Technical documentation

= Top documentation for this product selected by TI
No results found. Please clear your search and try again. View all 3
Type Title Date
* Datasheet DAC161P997 Single-Wire 16-bit DAC for 4- to 20-mA Loops datasheet (Rev. G) Dec. 24, 2014
Application note AN-2245 MSP430 Interface to DAC161P997 Code Library (Rev. A) Apr. 22, 2013
User guide DAC161P997 Evaluation Board User Guide Jan. 27, 2012

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Hardware development

EVALUATION BOARD Download
149
Description

DAC161P997EVAL is the evaluation board for the DAC161P997 Single-Wire 16-bit DAC for 4-20mA Loops. This board will help the user evaluate the functionality and performance of the DAC161P997. It is also a demonstration tool for the DAC?s unique single wire interface (SWIF).

DAC161P997EVAL combined (...)

Features

Contents:

  • Assembled DAC161P997EVAL Evaluation Board
  • DAC161P997EVAL Users Guide

Additional Tools:

  • SPIO-4 Sensor AFE Digital Controller Board
  • DAC161P997EVAL Users Guide
  • Application software for SPIO-4/DAC161P997EVAL kit
  • DAC161P997EVAL board schematic
  • DAC161P997EVAL board layout

Software development

DRIVER OR LIBRARY Download
PuffyALP
DAC161P997-SW
SUPPORT SOFTWARE Download
SNAC028.ZIP (43848 KB)
SUPPORT SOFTWARE Download
SNAC041.ZIP (12 KB)

Design tools & simulation

SIMULATION MODEL Download
SNAM145.TSC (306 KB) - TINA-TI Reference Design
SIMULATION MODEL Download
SNAM146.ZIP (19 KB) - TINA-TI Spice Model
SIMULATION TOOL Download
PSpice® for TI design and simulation tool
PSPICE-FOR-TI — PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
Features
  • Leverages Cadence PSpice Technology
  • Preinstalled library with a suite of digital models to enable worst-case timing analysis
  • Dynamic updates ensure you have access to most current device models
  • Optimized for simulation speed without loss of accuracy
  • Supports simultaneous analysis of multiple products
  • (...)
SIMULATION TOOL Download
SPICE-based analog simulation program
TINA-TI TINA-TI provides all the conventional DC, transient and frequency domain analysis of SPICE and much more. TINA has extensive post-processing capability that allows you to format results the way you want them. Virtual instruments allow you to select input waveforms and probe circuit nodes voltages (...)
CALCULATION TOOL Download
Analog engineer's calculator
ANALOG-ENGINEER-CALC — The Analog Engineer’s Calculator is designed to speed up many of the repetitive calculations that analog circuit design engineers use on a regular basis. This PC-based tool provides a graphical interface with a list of various common calculations ranging from setting op-amp gain with feedback (...)
Features
  • Expedites circuit design with analog-to-digital converters (ADCs) and digital-to-analog converters (DACs)
    • Noise calculations
    • Common unit translation
  • Solves common amplifier circuit design problems
    • Gain selections using standard resistors
    • Filter configurations
    • Total noise for common amplifier configurations
  • (...)

Reference designs

REFERENCE DESIGNS Download
Isolated Loop Powered Thermocouple Transmitter Reference Design
TIDA-00189 The Isolated Loop powered Thermocouple Transmitter reference design is a system solution providing precision K-type thermocouple measurements for 4 to 20-mA isolated current-loop applications. This design is intended as an evaluation module for users to fast prototype and develop end-products for (...)
document-generic Schematic

CAD/CAE symbols

Package Pins Download
WQFN (RGH) 16 View options

Ordering & quality

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  • REACH
  • Device marking
  • Lead finish/Ball material
  • MSL rating/Peak reflow
  • MTBF/FIT estimates
  • Material content
  • Qualification summary
  • Ongoing reliability monitoring

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