説明

The AS8525 is a companion IC for battery- and current sensor LIN slaves. Beside voltage regulators for analog and digital domain the IC provides a LIN transceiver, a precision voltage attenuator, a programmable gain high side amplifier with input chopper and level shift to a low common mode differential output, a micro controller interface and a window watchdog. The integrated chop clock synchronization enables a zero offset measurement system for small shunt signals in positive battery rail in conjunction with AS8510 or AS8501.

主な機能

• LDOs for 5V or 3.3V output – selected by factory programming
• LIN 2.0/2.1 transceiver, load independent slew control
• Micro controller interface for configuration,diagnosis and status readout, watch dog trigger and backup register access
• Normal-, standby- or sleep operating modes
• Window watch dog
• Reset generator with factory programmable reset time
• Output voltage monitor with factory adjustable level
• Resistive attenuator with power down in low power mode for battery voltage measurement
• Programmable gain, high performance, very low drift amplifier, auto zero offset in conjunction with AS8510 ADC and chopping
• Unique chip ID for traceability
• QFN 32 package

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Battery sensor - High Side current sensor companion IC

Blockdiagramm AS8525 High Side current sensor companion IC