アプリケーションノート 2768

Ultra-Low Quiescent Supply Current 125kHz ASK Receiver


要約: This application note shows a simple design for a 125kHz ASK receiver for a tire pressure monitoring system (TPMS). This LFRF receiver needs only a 2.1V supply voltage and 4µA (typ) supply current. The design uses a tiny comparator acting as a limiting amplifier, the MAX9075, and a transistor for detection. A nanopower comparator, the MAX9117, can be used to reduce the supply current to 600nA (typ).