a4231 general features
The a4231 is a proximity sensor integrated circuit to be used with a broad range of inductive single-coiled proximity transducers in proximity detection applications

❐ Monolithic IC in bipolar technology
❐ User-adjustable sensing range by means of a single external resistor
❐ User-adjustable hysteresis (0…15%)
❐ 5.5V…35V broad supply voltage range
❐ Low-voltage operation possible using stabilised 4.5V…5.5V voltage source
❐ Internal voltage regulator to improve immunity against fluctuations of supply
   voltage
❐ Broad operating temperature range: -25°C...90°C
❐ Can work with a broad selection of inductive transducers
❐ NPN open collector output with guaranteed sink current of 150mA
❐ Output overload/over current protection
❐ Integrated power-on and detect LED drivers
❐ Normally open(NO)/normally closed(NC) select pin
❐ Broad range of operating frequencies: 100kHz…1MHz
❐ Output over current and short-circuit protection
❐ Easy temperature compensation of proximity transducers
❐ Package – QFN-24