ATSENSE301HA-AU

Analog Front End (AFE) Overview

The ATSENSE301HA-AU is a poly-phase analog front end (AFE) from Microchip Technology, designed for high-precision energy metering. It integrates seven simultaneously sampled Sigma-Delta A/D converters, a high-precision voltage reference with up to 10 ppm/°C temperature stability, and an SPI interface. The device supports ANSI C12.20-2002 and IEC 62053-22 Class 0.2 standards over a 3000:1 current range. Key electrical parameters include a 24-bit resolution, 7 channels, typical power consumption of 2.5 mW per channel at 3.3V, and operation within a digital supply range of 3.0V to 3.6V.

Analog Front End (AFE) Feature Summary

• Integrates seven simultaneous Sigma-Delta ADCs with 102 dB dynamic range
• High-precision voltage reference with 10 ppm/°C drift (H-version)
• Compliant with Class 0.2 metrology accuracy standards
• Includes programmable gain amplifiers (x1, x2, x4, x8) for current channels

Analog Front End (AFE) Applications

• Poly-phase smart meters
• Data acquisition systems requiring high precision
• Energy measurement applications using shunts, CTs, or Rogowski coils

Analog Front End (AFE) Procurement Notes

Verify the specific H-grade variant requirements for low temperature drift specifications. Confirm that the 32-TQFP package dimensions match the target PCB layout. Ensure the design accounts for the separate analog and digital supply domains as specified in the datasheet.

Analog Front End (AFE) Selection Notes

Select this component for poly-phase applications requiring seven independent measurement channels. The 'H' suffix indicates the version with enhanced voltage reference stability suitable for strict accuracy classes. Verify compatibility with the host MCU's SPI interface timing and voltage levels.

Analog Front End (AFE) Part Context

This part belongs to the ATSENSE family, which includes single-phase (ATSENSE-101) and dual-phase (ATSENSE-201) variants. The ATSENSE-301(H) is specifically engineered for three-phase four-wire configurations, providing the necessary channel count for comprehensive poly-phase energy monitoring.

Analog Front End (AFE) Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.