Overview
The DAC161S997RGHT, produced by Texas Instruments, is a highly integrated 16-bit ΣΔ digital-to-analog converter (DAC) designed for transmitting an analog output current over an industry standard 4-20 mA current loop. This device is particularly suited for low-power, compact loop-powered applications in industrial settings. It features a simple 4-wire SPI interface for data transfer and configuration, an internal ultra-low power voltage reference, and an internal oscillator. The DAC161S997RGHT is ideal for 2- and 4-wire industrial transmitters and is available in a 16-pin WQFN package with a small footprint of 4-mm × 4-mm.
Key Specifications
| Parameter | Value |
|---|---|
| Resolution | 16-bit |
| Supply Current | 100 µA |
| Gain Error | 5 ppmFS/°C |
| Power-Up Condition | Pin-Programmable |
| Error Detection | Loop-Error Detection and Reporting |
| Output-Current Error Levels | Programmable |
| HART Modulator Interfacing | Simple |
| Package Type | WQFN-16 (4-mm × 4-mm, 0.5-mm Pitch) |
| Operating Temperature Range | –40°C to +105°C |
Key Features
- Very-low supply current of 100 µA, reducing power consumption and increasing available current for the system.
- Internal ultra-low power voltage reference and internal oscillator, minimizing external component count.
- Pin-programmable power-up condition and programmable output-current error levels.
- Loop-error detection and reporting, ensuring robust operation.
- Simple HART modulator interfacing, allowing FSK modulated digital data injection into the 4-20 mA current loop.
- Highly integrated feature set in a small footprint WQFN-16 package.
Applications
- Two-Wire 4- to 20-mA Current-Loop Transmitters.
- Loop-Power Transmitters.
- Industrial Process Control.
- Actuator Control.
Q & A
- What is the resolution of the DAC161S997RGHT?
The DAC161S997RGHT has a 16-bit resolution. - What is the typical supply current of the DAC161S997RGHT?
The typical supply current is 100 µA. - What is the gain error of the DAC161S997RGHT?
The gain error is 5 ppmFS/°C. - How does the DAC161S997RGHT handle power-up conditions?
The power-up condition is pin-programmable. - What kind of error detection does the DAC161S997RGHT support?
The DAC161S997RGHT supports loop-error detection and reporting. - Can the output-current error levels be programmed?
Yes, the output-current error levels are programmable. - How does the DAC161S997RGHT interface with HART modulators?
The DAC161S997RGHT has simple HART modulator interfacing, allowing FSK modulated digital data injection into the 4-20 mA current loop. - What is the package type and size of the DAC161S997RGHT?
The DAC161S997RGHT is available in a 16-pin WQFN package with a size of 4-mm × 4-mm and a 0.5-mm pitch. - What is the operating temperature range of the DAC161S997RGHT?
The operating temperature range is –40°C to +105°C. - What are some common applications of the DAC161S997RGHT?
Common applications include two-wire 4- to 20-mA current-loop transmitters, loop-power transmitters, industrial process control, and actuator control.
