DAC161P997TDA2

ADCs/DACs - Special Purpose Overview

The DAC161P997 is a 16-bit Delta-Sigma digital-to-analog converter designed for industrial 4-20mA current loop applications. It features an integrated low-power voltage reference and oscillator, reducing component count in compact loop-powered designs. The device communicates via a simple serial interface and includes a high-speed channel modulator to inject FSK-modulated digital data into the current loop. With a supply current of 100µA, it allows residual current for system peripherals. Key electrical specifications include 16-bit resolution, a gain error temperature coefficient of 5ppm/°C, and pin-programmable power-up conditions.

ADCs/DACs - Special Purpose Feature Summary

• 16-bit resolution with Sigma-Delta modulation architecture
• Integrated ultra-low-power voltage reference and oscillator
• Supports FSK data injection via high-speed channel modulator
• Low supply current of 100µA

ADCs/DACs - Special Purpose Applications

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

ADCs/DACs - Special Purpose Part Context

The DAC161P997 belongs to the SVA product family from Texas Instruments, specifically engineered for precision analog output in harsh industrial environments. It serves as a digital interface solution for replacing traditional analog control signals in 4-20mA loops. The 'TDA2' suffix indicates a specific tape-and-reel packaging variant intended for automated surface-mount assembly processes.

ADCs/DACs - Special Purpose Replacement Considerations

The DAC161S997 is a functional alternative within the same family, distinguished by its support for standard SPI communication instead of the single-wire interface (SWI) used by the DAC161P997. Designers must verify interface compatibility when substituting these devices.