AFE881H1RRUT

Analog Front End (AFE) Overview

The AFE881H1RRUT is a single-channel, low-power 16-bit digital-to-analog converter (DAC) with an integrated HART modem, voltage reference, and diagnostic ADC. Designed for 4-mA to 20-mA loop-powered applications, it features a 16-bit DAC with 4-LSB INL and 0.07% FSR TUE. The device includes a 12-bit 3.84-kSPS diagnostic ADC, a 1.25-V internal reference (10 ppm/°C), and an internal 1.2288-MHz oscillator. It supports SPI and UART interfaces and operates from a 1.71-V to 5.5-V supply with a typical quiescent current of 180 µA.

Analog Front End (AFE) Feature Summary

• 16-bit monotonic DAC with 4-LSB INL and 0.07% FSR total unadjusted error
• Integrated HART-compliant physical layer FSK modem
• 12-bit 3.84-kSPS diagnostic ADC for system health monitoring
• Internal 1.25-V voltage reference with 10 ppm/°C drift

Analog Front End (AFE) Applications

• 2-wire, 4-mA to 20-mA loop-powered transmitters
• Process control and industrial automation systems
• Smart transmitters with HART communication

Analog Front End (AFE) Procurement Notes

Verify the RRU package designation and RRUT reel quantity suffix against the specific orderable part number in the manufacturer's latest documentation. Confirm RoHS compliance status and moisture sensitivity level requirements prior to procurement.

Analog Front End (AFE) Selection Notes

Select this component for applications requiring high accuracy (16-bit resolution) combined with HART protocol support in a low-power environment. Ensure external circuitry provides voltage-to-current conversion and power regulation as the device only supplies the analog front-end signals.

Analog Front End (AFE) Part Context

This part belongs to the AFEx81H1 family, which also includes the 14-bit AFE781H1. Both devices share identical pinouts and functional blocks, differing primarily in DAC resolution. They are designed to replace legacy solutions by integrating the modem, reference, and diagnostics into a single UQFN package.

Analog Front End (AFE) Replacement Considerations

AFE781H1RRUT: Identical pinout and functionality with 14-bit DAC resolution instead of 16-bit.