NAFE71388B40BSMP

Analog Front End (AFE) Overview

The NAFE71388B40BSMP is a high-speed, industrial-grade analog front-end (AFE) featuring eight configurable universal inputs. It integrates low-leakage high-voltage multiplexers, programmable gain amplifiers, and a 24-bit Delta-Sigma ADC. The device supports data rates up to 576 kSPS with simultaneous 50 Hz/60 Hz line rejection. It provides ±25 V input ranges, overvoltage protection up to ±36 V, and robust diagnostic capabilities including CRC error detection and internal temperature sensing. Powered by ±7 V to ±24 V HV and 3.3 V LV supplies, it operates from -40 °C to +125 °C in a 64-pin HVQFN package.

Analog Front End (AFE) Feature Summary

• High-speed performance: Data rates up to 576 kSPS with 17-bit ENOB at 144 kSPS
• Universal inputs: Eight channels supporting single-ended or differential signals up to ±25 V
• System calibration: Integrated precise voltage sources for end-to-end self-calibration
• Robust protection: ±36 V overvoltage tolerance and 7.5 kV HBM ESD protection

Analog Front End (AFE) Applications

• Programmable Logic Controller (PLC) I/O modules
• Industrial automation and process control systems
• Data acquisition systems requiring high precision and speed

Analog Front End (AFE) Procurement Notes

Verify the ordering suffix 'MP' indicates reel packing for surface-mount assembly. Confirm the specific B40 variant matches the required factory calibration coefficients. Ensure the host system supports the 32 MHz SPI interface and appropriate power supply rails of ±7 V to ±24 V for HV and 3.3 V for LV domains.

Analog Front End (AFE) Selection Notes

Select this model over the NAFE11388 when higher throughput is required, as the NAFE71388 supports up to 576 kSPS compared to the 288 kSPS limit of the low-power variant. Both share pin compatibility and software interfaces. Verify that the application benefits from the increased speed without exceeding the thermal constraints of the HVQFN64 package.

Analog Front End (AFE) Part Context

This component belongs to the NAFEx1388 family of universal input AFEs designed for scalable industrial applications. It shares the same 64-pin HVQFN footprint and register map as the NAFE11388 and NAFE11348, allowing for pin-to-pin upgrades. The family is optimized for offloading host processors through integrated sequencers and digital filtering.

Analog Front End (AFE) Replacement Considerations

NAFE11388B40BSMP offers identical pinout and software compatibility but with lower maximum data rates (288 kSPS). NAFE11348B40BSMP provides 16-bit resolution instead of 24-bit.