Overview
The DAC161S997RGHR from Texas Instruments is a 16-bit precision 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 compact loop-powered applications due to its very low power consumption and highly integrated feature set. The DAC161S997RGHR includes an internal ultra-low power voltage reference and an internal oscillator, which reduce the need for external components and minimize power consumption. It also features a simple 4-wire SPI interface for data transfer and configuration, and it supports HART modulator interfacing for injecting FSK modulated digital data into the current loop.
Key Specifications
| Parameter | Value |
|---|---|
| Resolution | 16 bits |
| Supply Current | 100 µA |
| Gain Error | 5 ppmFS/°C |
| Output Current Range | 4-20 mA |
| Package Type | WQFN-16 (4-mm × 4-mm, 0.5-mm Pitch) |
| Operating Temperature Range | –40°C to +105°C |
| Digital Interface | 4-wire SPI |
| Internal Components | Ultra-low power voltage reference, internal oscillator |
Key Features
- Very-low supply current of 100 µA
- Pin-programmable power-up condition
- Loop-error detection and reporting
- Programmable output-current error levels
- Simple HART modulator interfacing
- Highly integrated feature set in a small footprint
- Internal ultra-low power voltage reference and internal oscillator
Applications
- Two-wire and four-wire industrial transmitters
- Loop-power transmitters
- Industrial process control
- Actuator control
Q & A
- What is the resolution of the DAC161S997RGHR?
The DAC161S997RGHR has a resolution of 16 bits. - What is the typical supply current of the DAC161S997RGHR?
The typical supply current is 100 µA. - What is the gain error of the DAC161S997RGHR?
The gain error is 5 ppmFS/°C. - What is the output current range of the DAC161S997RGHR?
The output current range is 4-20 mA. - What type of package does the DAC161S997RGHR come in?
The DAC161S997RGHR comes in a WQFN-16 package (4-mm × 4-mm, 0.5-mm Pitch). - What is the operating temperature range of the DAC161S997RGHR?
The operating temperature range is –40°C to +105°C. - What type of digital interface does the DAC161S997RGHR use?
The DAC161S997RGHR uses a 4-wire SPI interface. - Does the DAC161S997RGHR have internal voltage reference and oscillator?
Yes, it includes an internal ultra-low power voltage reference and an internal oscillator. - What is the primary application of the DAC161S997RGHR?
The primary application is in two-wire and four-wire industrial transmitters. - Does the DAC161S997RGHR support HART modulator interfacing?
Yes, it supports HART modulator interfacing for injecting FSK modulated digital data into the current loop.
