ATSENSE101A-SU

Analog Front End (AFE) Overview

The ATSENSE101A-SU is a single-phase analog front end (AFE) from Microchip Technology, designed for energy metering applications. It integrates three Sigma-Delta A/D converters, including two current channels and one voltage channel, alongside a programmable gain amplifier and an integrated 2.8V LDO regulator. The device supports shunt, current transformer, and Rogowski coil inputs with pre-gain settings of x1, x2, x4, or x8. It features an SPI interface for data retrieval and control, operating within a 3.0V to 3.6V supply range while consuming less than 2.5 mW per channel at 3.3V. The component is housed in a 20-lead SOIC package.

Analog Front End (AFE) Feature Summary

• Integrates three simultaneous sampling Sigma-Delta ADCs with 102 dB dynamic range
• Compliant with Class 0.2 standards (ANSI C12.20-2002 and IEC 62053-22)
• Includes dedicated anti-tamper measurement channel with input multiplexer
• Features integrated 2.8V LDO regulator and precision voltage reference

Analog Front End (AFE) Applications

• Single-phase smart meters with anti-tamper capabilities
• Energy measurement systems using shunt, CT, or Rogowski coils
• Data acquisition systems requiring high-precision low-power signal conditioning

Analog Front End (AFE) Procurement Notes

Verify the specific suffix 'A-SU' against official documentation to confirm package type and temperature grade. Ensure compatibility with the host MCU's SPI interface timing requirements. Confirm that the 20-lead SOIC package dimensions match the PCB footprint design specifications.

Analog Front End (AFE) Selection Notes

Select this model for single-phase applications requiring integrated anti-tamper monitoring. Compare channel count and dynamic range against dual-phase (ATSENSE-201) or poly-phase (ATSENSE-301) variants if multi-phase measurement is required. Verify that the 16 kSps output data rate meets the system's sampling needs.

Analog Front End (AFE) Part Context

This component belongs to the ATSENSE family of multi-channel analog front ends. It is specifically engineered to work in conjunction with Microchip ATSAM4C device families featuring Cortex-M4 processors and metrology libraries to achieve high accuracy over wide current ranges.

Analog Front End (AFE) Replacement Considerations

For dual-phase requirements, consider the ATSENSE-201(H). For poly-phase applications, the ATSENSE-301(H) offers seven channels. Higher stability versions are available as ATSENSE-201H and ATSENSE-301H with 10 ppm/°C drift references.

Analog Front End (AFE) FAQ

How is die temperature measured?

Die temperature is measured via the tamper channel (ADC I0) by setting the TEMPMEAS bit in the control register. The user must average at least 64 samples for repeatable results.

What is the maximum input signal level?

The maximum input signal level is typically ±0.25V to avoid leakage in internal ESD protection devices connected to GNDA.

Does the device support burst mode?

Yes, the SPI controller supports burst transmission mode, allowing up to seven 32-bit ADC output results to be captured in a single access.