DAC161P997是TI公司的一款电流输出为4至20mA的精密DAC产品，DAC161P997是用于 4-20mA 环路的单线 16 位 DAC，本页介绍了DAC161P997的产品说明、应用、特性等，并给出了与DAC161P997相关的TI元器件型号供参考。
DAC161P997 - 用于 4-20mA 环路的单线 16 位 DAC - 电流输出为4至20mA的精密DAC - 数模转换器 - TI公司（Texas Instruments，德州仪器）
- 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 x 4 mm, 0.5 mm Pitch)
- 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)
- Two-Wire, 4-20 mA Current Loop Transmitter
- Industrial Process Control
- Actuator Control
- Factory Automation
- Building Automation
- Precision Instruments
- Data Acquisition Systems
- Test Systems
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. 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.
| PART NUMBER | PACKAGE | BODY SIZE (NOM) |
|---|---|---|
| DAC161P997 | WQFN (16) | 4.00 mm x 4.00 mm |
