General description
The AS8501 is a complete, low power data acquisition system for very small signals (i.e. voltages from shunt resistors, thermocouples) that operates on a single 5 V power supply. The chip powers up with a set of default conditions at which time it can be operated as a read-only-converter. Reprogramming is at any time possible by just writing into two internal registers via the serial interface.
The AS8501 has four ground refering inputs which can be switched separately to the internal PGA. Two input channels can also be operated as a fully differential ground free input. The system can measure both positive and negative input signals.

FEATUREs
● 16 bits resolution
● Differential inputs
● Single + 5V supply
● Low power 15 mW
● SOIC16 package
● Self- and system-calibration
   with auto-calibration on power up
● 16 kHz maximum sampling frequency
● Internal temperature measurement
● Internal factory trimmed precision reference
● Programmable current sources
● Digital comparator
● Active wake-up
● PGA gains 1, 6, 24, 50, 100
● Zero offset
● Zero offset TC
● Extremely low noise
● Internal oscillator with comparator for active wake up
● 3-wire serial interface, !P compatible
● Temperature range – 40 to + 125 °C
● Individual 24-bit serial number

APPLICATIONs
● Battery management for automotive systems
● Power management
● mV/µV-meter
● High-precision voltage and current measurement