SNP729 Datasheet | SENASIC

Description The SNP729 is a sensor for air pressure measurements designed for TPMS (Tire Pressure Monitoring System) applications. Features - Calibrated pressure sensor for absolute pressure measurement - Temperature and supply voltage sensor - 8051 based microcontroller - Standby current 0.9u A - RF Transmitter 433MHz/315MHz/2.4GHz integrated - External accelerometer - Support LF programming - Absolute Pressure range: 450k Pa/900k Pa/1500k Pa RF1 Frequency PA Modulation FSK deviation Format RF2 Frequency PA Modulation Receiver Sensitivity LF (Wakeup, Programming) Format Format speed Pressure Sensor resistance Main measure Temperature Main measure On chip oscillator frequency Micro LF decoder Flash RAM 315 / 433.92 On chip ASK / FSK 90 Manchester 2.4GHz On chip GFSK -85 ment MHz - programmable about centre freq 3.5 ~10 d Bm output power k Hz - programmable Mark/space also supported ment MHz - programmable about centre freq 4 d Bm maximum output power d Bm Manchester 3.9/6.5 OOK & PWM also supported Kbps 20 to 3.3 ADC -40~125℃ ADC k Ohm 12 bit 12 bit 8/39/2000 KHz Fuzzy 16 384 Improves noise and distortion performance. Kbytes Bytes GPIO Other Package Battery Supply LGA 24Pin 2.1~3.6 SIP (System In Package) Volts Applications - Tire Pressure Monitoring System - MEMs sensor Functional Description SNP729 consists of 16KB Flash memory, interrupt bus, configuration registers and control bus which operate the analogue circuitry all of which are controlled via an 8-bit integrated microcontroller. The micro is clocked by a tunable oscillator with a selectable center frequency. The motion detection is achieved via external accelerometer. Measurements of pressure, temperature, and battery voltage are performed under software control, and the data can be formatted and prepared for RF transmission by the microcontroller. A software defined wakeup mechanism is developed for minimizing power consumption. An Interval timer controls the timing of measurements and...