AFE881H1RRUR

Analog Front End (AFE) Overview

The AFE881H1RRUR is a low-power analog front-end featuring a 16-bit DAC, HART modem, and diagnostic ADC. It operates from 1.71 V to 5.5 V with 180 µA quiescent current. The device includes an integrated 1.25-V reference (10 ppm/°C) and internal oscillator. Key electrical parameters include 4-LSB INL, 3.84-kSPS ADC sampling rate, and SPI/UART interfaces. It supports –55°C to +125°C operation in a 24-pin UQFN package.

Analog Front End (AFE) Feature Summary

• 16-bit monotonic DAC with 4-LSB INL and 0.07% FSR TUE
• Integrated HART-compliant physical layer modem
• 12-bit diagnostic ADC operating at 3.84 kSPS
• 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 suffix indicates the 24-pin UQFN package configuration. Confirm RoHS compliance status through official documentation. Ensure supply voltage requirements match the specific PVDD and IOVDD configurations for the target application environment.

Analog Front End (AFE) Selection Notes

Select this component for applications requiring integrated HART modulation without external modems. The 16-bit resolution suits high-accuracy process control. Verify that external voltage-to-current conversion circuitry is included in the design, as the device provides only the voltage output stage.

Analog Front End (AFE) Part Context

This part belongs to the AFEx81H1 family, which also includes the 14-bit AFE781H1. Both share identical pinouts and features, differing primarily in DAC resolution. The AFE881H1 is designed specifically for intrinsic safety and functional safety-capable designs in industrial sensor-transmitter applications.

Analog Front End (AFE) Replacement Considerations

The AFE781H1RRUR is a direct pin-compatible alternative offering 14-bit resolution instead of 16-bit. No other public substitutes are confirmed in the provided documentation.