ATSENSE301A-AUR

Analog Front End (AFE) Overview

The ATSENSE301A-AUR is a poly-phase analog front-end (AFE) device from Microchip Technology, designed for high-precision energy metering. It integrates seven simultaneously sampled Sigma-Delta A/D converters, a precision voltage reference, programmable current signal amplification, and an SPI interface. The device supports Class 0.2 standards compliance over a 3000:1 current range when paired with compatible microcontrollers. Key electrical parameters include a typical power consumption of less than 2.5 mW per channel at 3.3V, a 2.8V integrated LDO regulator, and operation within a digital supply voltage range of 3.0V to 3.6V.

Analog Front End (AFE) Feature Summary

• Integrates seven Sigma-Delta ADC channels with 102 dB dynamic range for simultaneous voltage and current measurement
• Features programmable gain amplifiers (x1, x2, x4, x8) supporting Shunt, CT, and Rogowski coil inputs
• Includes an integrated die temperature sensor and calibration registers for software-based drift compensation
• Provides an 8 MHz SPI-compatible interface with burst transmission mode for efficient data acquisition

Analog Front End (AFE) Applications

• Three-phase, four-wire smart meters requiring ANSI C12.20-2002 and IEC 62053-22 Class 0.2 accuracy
• Poly-phase energy monitoring systems utilizing shunt, current transformer, or Rogowski coil sensors
• Anti-tamper measurement applications using dedicated current channels and neutral current monitoring

Analog Front End (AFE) Procurement Notes

Verify the specific suffix 'AUR' against the manufacturer's official documentation to confirm tape-and-reel packaging and any associated functional variations. Ensure compatibility with the target microcontroller's metrology library and SPI interface requirements before procurement.

Analog Front End (AFE) Selection Notes

Select this component for poly-phase applications requiring seven independent measurement channels. Verify that the system design accommodates the 32-lead TQFP package dimensions and the required external passive components for anti-alias filtering and voltage reference stability.

Analog Front End (AFE) Part Context

This part belongs to the ATSENSE-301(H) family, which includes variants like ATSENSE301HA. The 'A' designation typically indicates standard temperature drift characteristics (50 ppm/°C), whereas 'H' versions offer improved stability (10 ppm/°C). The 'AU' suffix denotes the 32-TQFP package, while 'R' specifies reel packaging.

Analog Front End (AFE) Replacement Considerations

ATSENSE301HA-AU is a direct pin-compatible alternative offering higher precision voltage reference stability (10 ppm/°C vs 50 ppm/°C). Ensure software calibration routines are updated if migrating from the standard to the H-grade version.