DAC161P997CISQ/NOPB

ADCs/DACs - Special Purpose Overview

The DAC161P997CISQ/NOPB is a single-channel, 16-bit digital-to-analog converter (DAC) designed for industrial 4-20 mA loop applications. It features a Single-Wire Interface (SWI) for simplified communication and integrates a precision internal reference. The device supports remote powering from the current loop, eliminating the need for a local supply in two-wire configurations. Key electrical specifications include a gain error of 0.05% FSR and a power consumption of 5.5 mW. It operates within an extended temperature range of -40°C to +105°C and is housed in a WQFN-16 package.

ADCs/DACs - Special Purpose Feature Summary

• Single-Wire Interface (SWI) reduces pin count and simplifies PCB layout compared to standard SPI.
• Integrated high-precision internal voltage reference ensures accuracy without external components.
• Supports remote powering from the 4-20 mA loop for two-wire transmitter applications.
• Low power consumption of 5.5 mW aids in thermal management for compact enclosures.

ADCs/DACs - Special Purpose Applications

• Two-wire 4-20 mA transmitters for process control sensors.
• Industrial automation systems requiring precise current loop signaling.
• Remote monitoring devices with limited power availability.

ADCs/DACs - Special Purpose Procurement Notes

Verify the suffix NOPB indicates lead-free and RoHS compliance per Texas Instruments standards. Confirm the CISQ variant matches the required operating temperature range (-40°C to +105°C). Ensure the WQFN-16 package footprint aligns with the target PCB design. Check for any specific handling requirements due to moisture sensitivity levels indicated in the datasheet.

ADCs/DACs - Special Purpose Selection Notes

Select this component when a single-wire interface is preferred to minimize microcontroller I/O usage. Choose over the DAC161S997 if SWI compatibility is required rather than standard SPI. Consider the integrated reference and low power profile for battery-operated or thermally constrained environments. Verify that the 16-bit resolution meets the system's accuracy requirements for the 4-20 mA span.

ADCs/DACs - Special Purpose Part Context

This part belongs to the DAC161S/P997 family, which are specialized DACs for 4-20 mA loops. The 'P' designation specifically denotes the Single-Wire Interface capability, distinguishing it from the 'S' variant which uses SPI. Both variants share similar electrical performance but differ in communication protocol and pinout configuration.

ADCs/DACs - Special Purpose Replacement Considerations

The DAC161S997CISQ/NOPB is a functional alternative if the application can support SPI instead of SWI. Analog Devices AD5421 offers comparable 16-bit performance but requires different interface handling. Verify pin compatibility and software driver adjustments before substituting.