AFE882H1RRUT

Analog Front End (AFE) Overview

The AFE882H1RRUT is a 16-bit low-power digital-to-analog converter (DAC) with an integrated HART modem, voltage reference, and diagnostic ADC. It features a 0 V to 2.5 V output range, 180 µA typical quiescent current, and supports SPI or UART interfaces. The device includes a 12-bit 3.84-kSPS diagnostic ADC for self-health checks and operates from -55°C to +125°C in a 24-pin UQFN package.

Analog Front End (AFE) Feature Summary

• 16-bit monotonic DAC with 4-LSB INL and 0.07% FSR max TUE
• Integrated HART-compliant physical layer modem
• 12-bit 3.84-kSPS diagnostic ADC for system health monitoring
• Low quiescent current of 180 µA (typical)

Analog Front End (AFE) Applications

• Process control and industrial automation
• PLC or DCS I/O modules
• 3-wire and 4-wire transmitters
• 4-mA to 20-mA loop-powered applications

Analog Front End (AFE) Procurement Notes

Verify the RRU suffix indicates the 24-pin UQFN package configuration. Confirm that external voltage-to-current conversion components are included in the design, as the AFE882H1 provides only voltage outputs. Ensure compliance with functional safety documentation requirements if deploying in safety-critical systems.

Analog Front End (AFE) Selection Notes

Select the AFE882H1RRUT over the AFE782H1 when 16-bit resolution is required. Verify interface needs: SPI offers shared bus capability, while UART allows separate buses for DAC and HART. Ensure PVDD and IOVDD supply rails match the 2.7 V to 5.5 V operating range.

Analog Front End (AFE) Part Context

The AFE882H1 belongs to the AFEx82H1 family, designed for HART-enabled process control. It integrates most components needed for sensor transmitters, including a 10-ppm/°C voltage reference and internal oscillator. External power regulation is required for intrinsic safety applications.

Analog Front End (AFE) Replacement Considerations

AFE782H1RRUT: 14-bit resolution variant within the same package and feature set.