AS8501-ASOU

Overview

The AS8501-ASOU is a high-precision sensor interface and data acquisition system designed for low-power applications. It features a 16-bit resolution ADC with differential inputs, operating on a single +5V supply. The device includes a programmable gain amplifier (PGA) with gains of 1, 6, 24, 50, and 100, supporting input ranges from 7mV to 120mV full scale. It offers a maximum sampling frequency of 16 kHz and consumes only 15 mW of power. Key specifications include an internal temperature measurement capability, factory-trimmed precision reference, and extremely low noise density of 35 nV/√Hz. The chip integrates self-calibration, auto-calibration on power-up, and a digital comparator.

Feature Summary

• Features a fully integrated low-noise analog front-end with chopper stabilization for DC accuracy.
• Includes programmable current sources for activating external sensors such as RTDs or thermocouples.
• Supports active wake-up mode via internal oscillator comparator to minimize standby power consumption.
• Provides individual 24-bit serial numbers and Zener-Zap memory for storing sensor-specific calibration data.

Applications

• Battery management systems in automotive environments
• High-precision voltage and current measurement circuits
• Power management units requiring microvolt-level accuracy

Procurement Notes

Verify the specific suffix 'ASOU' against the manufacturer's official ordering guide to confirm package type and tape-and-reel specifications. Ensure compatibility with the SOIC-16 footprint and check for any updated RoHS compliance documentation. Confirm that the source document matches the revision level required for your design implementation.

Selection Notes

Select this component when designing systems requiring high accuracy for small signal measurements from shunt resistors or thermocouples. It is suitable for applications needing simultaneous multi-channel monitoring with minimal external components. Consider the PGA gain settings based on the expected input signal amplitude to optimize dynamic range and noise performance.

Part Context

The AS8501 is part of the specialized interface IC family originally developed by austriamicrosystems AG, now ams AG. This series focuses on precision analog-to-digital conversion for industrial and automotive sensing. The AS8501 specifically targets battery management and power monitoring where high linearity and low offset are critical requirements.

Replacement Considerations

No direct public substitute part numbers are documented in the provided datasheet. Evaluate alternative high-precision ADCs with similar PGA configurations and 16-bit resolution if sourcing constraints exist. Verify pinout compatibility and register mapping before considering any cross-reference solutions.