ATSENSE301A-ANR

Analog Front End (AFE) Overview

The ATSENSE301A-ANR is a poly-phase analog front-end device designed for high-precision energy metering. It integrates seven simultaneously sampled Sigma-Delta A/D converters, including three voltage and four current channels, with a dedicated anti-tamper input. The component features a programmable current signal amplifier, an integrated 2.8V LDO regulator, and a precision voltage reference. Communication is handled via an SPI interface, supporting data rates up to 8 MHz. Designed for operation between 3.0V and 3.6V, it delivers ultra-low power consumption of less than 2.5 mW per channel at 3.3V.

Analog Front End (AFE) Feature Summary

• Seven simultaneous Sigma-Delta ADC channels (three voltage, four current) with 102 dB dynamic range
• Programmable gain amplifiers (x1, x2, x4, x8) for current channels supporting shunts, CTs, and Rogowski coils
• Integrated 2.8V LDO regulator and precision voltage reference with factory-measured calibration data
• Compliant with ANSI C12.20-2002 and IEC 62053-22 Class 0.2 standards over a 3000:1 current range

Analog Front End (AFE) Applications

• Poly-phase smart meters requiring high accuracy
• Energy measurement systems utilizing Microchip ATSAM4C MCU families
• Data acquisition systems integrating Shunt, Current Transformer, or Rogowski coil sensors

Analog Front End (AFE) Procurement Notes

Verify the specific suffix 'ANR' against official documentation to confirm package type and temperature grade. Confirm that the H-version characteristics are not required if selecting this standard variant. Ensure compatibility with the intended microcontroller's SPI interface timing and voltage levels before procurement.

Analog Front End (AFE) Selection Notes

Select this model for poly-phase applications requiring four current inputs. Verify that the standard voltage reference drift (50 ppm typical) meets system requirements, as the H-version offers improved stability (10 ppm typical). Ensure the design accommodates the 32-lead TQFP or 20-lead SOIC package options available for the family.

Analog Front End (AFE) Part Context

This component belongs to the ATSENSE-101/ATSENSE-201(H)/ATSENSE-301(H) family of multi-channel analog front ends. It is specifically engineered to work in conjunction with Microchip's ATSAM4C device family, which provides a dedicated Cortex®-M4 processor and metrology library to achieve high-accuracy metering performance.

Analog Front End (AFE) Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Consider evaluating other members of the ATSENSE family, such as the ATSENSE-201H for dual-phase applications with higher reference stability, if channel count or accuracy requirements differ.