DAC161S997RGHR

ADCs/DACs - Special Purpose Overview

The DAC161S997RGHR is a 16-bit, low-power Sigma-Delta digital-to-analog converter (DAC) manufactured by Texas Instruments. Designed for industrial 4-20 mA current loop applications, it operates on a single supply voltage ranging from 2.7 V to 3.6 V with a typical supply current of only 100 µA. The device integrates an internal ultra-low-power voltage reference and oscillator, reducing external component requirements. It features a standard 4-wire SPI interface for data transmission and configuration. Packaged in a compact 16-WQFN (4x4 mm) format with exposed thermal pad, it supports operation temperatures from -40°C to +105°C.

ADCs/DACs - Special Purpose Feature Summary

• 16-bit resolution with integrated Sigma-Delta modulation for high precision
• Ultra-low power consumption: 100 µA typical supply current
• Integrated internal voltage reference and oscillator
• Supports HART protocol via built-in modem interface
• Loop error detection and reporting capabilities

ADCs/DACs - Special Purpose Applications

• Two-wire 4-20 mA current-loop transmitters
• Loop-powered industrial sensors
• Industrial process control systems
• Actuator control interfaces

ADCs/DACs - Special Purpose Procurement Notes

Verify the suffix RGHR corresponds to the 16-WQFN package with tape-and-reel shipping. Confirm RoHS compliance status as per the latest manufacturer documentation. Check moisture sensitivity level (MSL 3) requirements for storage and handling prior to assembly. Ensure the ordering part number matches the specific pinout and electrical specifications required for the design.

ADCs/DACs - Special Purpose Selection Notes

Select this component when designing loop-powered transmitters requiring minimal quiescent current to preserve headroom for other circuitry. The integrated reference and oscillator simplify PCB layout compared to discrete solutions. Ensure the microcontroller SPI interface is compatible with the device's timing requirements. Consider the 16-WQFN package size constraints and thermal dissipation needs given the exposed pad requirement.

ADCs/DACs - Special Purpose Part Context

The DAC161S997 belongs to Texas Instruments' specialized data converter family focused on industrial analog outputs. It complements other devices like the DAC8750 and DAC8760 but is distinct in its optimization for low-power, loop-driven applications rather than high-voltage or multi-channel outputs. The RGHR variant specifically denotes the WQFN package and reel packaging option.

ADCs/DACs - Special Purpose Replacement Considerations

For direct replacements within the same low-power loop driver category, consider the DAC161P997 which offers Single Wire Interface (SWI) instead of SPI. For higher voltage or multi-channel needs, evaluate the DAC8750 or DAC8760 series. Verify pin compatibility and software register mapping before substituting.