AFE78101RRUT

Analog Front End (AFE) Overview

The AFE78101RRUT is a 14-bit, low-power digital-to-analog converter (DAC) from Texas Instruments, designed for 4-mA to 20-mA loop-powered applications. It features a maximum quiescent current of 210 µA and supports supply voltages from 1.71 V to 5.5 V. The device integrates a 10 ppm/°C voltage reference and a 12-bit diagnostic ADC for self-health checks. It operates over an extended temperature range of –55°C to +125°C and includes fault detection mechanisms such as CRC checking and a windowed watchdog timer.

Analog Front End (AFE) Feature Summary

• 14-bit monotonic DAC with 0.07% FSR max total unadjusted error across the full temperature range
• Integrated 12-bit, 3.84-kSPS diagnostic ADC for internal node monitoring
• Low power consumption: 170 µA typical quiescent current at 1.8 V
• Built-in functional safety features including CRC bit error checking and alarm responses

Analog Front End (AFE) Applications

• 2-wire sensor transmitters
• Process control systems
• Industrial automation equipment
• Smart transmitter modules

Analog Front End (AFE) Procurement Notes

Verify the specific RRUT suffix against the manufacturer's package option addendum to confirm the UQFN 24-pin configuration and reel specifications. Ensure that external components for voltage-to-current conversion are selected to meet intrinsic safety requirements for loop-powered designs.

Analog Front End (AFE) Selection Notes

Select the AFE78101RRUT when a 14-bit resolution is sufficient for the application, offering lower power consumption compared to the 16-bit AFE88101 variant. Confirm that the system can accommodate the required 70 nF to 130 nF load capacitance for the integrated reference output stability.

Analog Front End (AFE) Part Context

This component belongs to the AFEx8101 family, which also includes the 16-bit AFE88101. Both devices share identical pinouts, thermal characteristics, and functional blocks, differing primarily in DAC resolution and associated accuracy metrics like INL and TUE.

Analog Front End (AFE) Replacement Considerations

The AFE88101RRUT serves as a direct pin-compatible upgrade within the same family, providing 16-bit resolution. No other cross-model replacements are documented in the provided source material.