Product Brief SP37 900kPa Tire Pressure Sensor Features The SP37 is a highly integrated device which performs all necessary functions for a Tire Pressure Monitoring System (TPMS) wheel module suited for high-volume applications. The device contains the sensing elements, the microcontroller, the Pressure sensor with a range from 100 up to 900kPa LF receiver, the RF transmitter and more in one package requiring only few external Radial acceleration sensor components to complete a TPMS module. Temperature sensor Supply voltage sensor Since 2003, more than 150 million TPMS sensors of our continuously improved Embedded 8051 compatible 8-bit microcontroller product generations were sold worldwide. 6kB on-chip FLASH memory The sensor design of the SP37 is based upon Infineon’s patented bulk micro- 256Byte RAM machined sensing technology which allows highly reliable measurements in harsh 315 and 434MHz FSK/ASK RF-transmitter environments. The SP37 measures pressure, radial acceleration, temperature and supply voltage. Selectable output power 5 or 8dBm The device is compliant to the RoHS standard, with a pressure range from 125kHz ASK high-sensitivity 100 up to 900kPa. Numerous embedded firmware functions and a development kit enable fast LF-receiver Advanced power control/ development cycles. wake-up system to minimize battery consumption TPMS Module Ultra low standby current 3V Lithium Cell (< 0.7μA) Supply voltage range 1.9...3.6V SP37 Operating temperature range Power Supply Management -40...125°C PG-DSOSP-14-6 package Pressure Sensor Acceleration Sensor RoHS compliant, green package ADC 8-bit µC RF Transmitter Temperature Sensor Tx Data 315/434MHz Voltage Sensor Flash Sensor Calibration Data & Appl. Firmware www.infineon.com/sensors ROM Firmware Library LF Receiver Rx Data 125kHz Product Brief SP37 900kPa Tire Pressure Sensor Parameter Symbol Values Min. Typ. Max. Unit Note/Test Condition Input Pressure Range Pin 100 – 500 kPa T = -40...125°C Measurement Error pError -7 – +7 kPa T = 0...50°C pError -9 – +9 kPa T = 50...70°C pError -17.5 – +17.5 kPa T = -40...0°C Input Pressure Range pin 500 – 900 kPa T = -40...125°C Measurement Error pError -14 – +14 kPa T = 0...50°C pError -18 +18 kPa T = 50...70°C pError -35 – +35 kPa T = -40...0°C T = 70...125°C T = 70...125°C Input Acceleration Range ain -115 – 115 g T = -40...125°C Sensitivity Error aSensitivity -18.75 – +18.75 % T = -40...90°C aSensitivity -24 – +24 % T = 90...125°C aOffset -6 – +6 g T = -20...70°C aOffset -8.5 – +8.5 g T = -40...-20°C Offset Error T = 70...90°C Temperature Measurement Error aOffset -12 – +12 g T = 90...125°C TError -3 – +3 °C T = -20...70°C TError -5 – +5 °C T = -40...-20°C T = 70...125°C Voltage Measurement Error -100 VError – +100 mV – Tighter specifications are available on request. Product Summary Sales Name Description Order Code SP370-25-116-0 Tire Pressure Sensor SP000910344 Published by Infineon Technologies AG 85579 Neubiberg, Germany © 2012 Infineon Technologies AG. All Rights Reserved. Visit us: www.infineon.com Order Number: B142-H9687-X-X-7600 Date: 06 / 2012 Attention please! The information given in this document shall in no event be regarded as a guarantee of conditions or characteristics (“Beschaffenheitsgarantie”). With respect to any examples or hints given herein, any typical values stated herein and/ or any information regarding the application of the device, Infineon Technologies hereby disclaims any and all warranties and liabilities of any kind, including without limitation warranties of non-infringement of intellectual property rights of any third party. Information For further information on technology, delivery terms and conditions and prices please contact your nearest Infineon Technologies Office (www.infineon.com). Warnings Due to technical requirements components may contain dangerous substances. For information on the types in question please contact your nearest Infineon Technologies Office. Infineon Technologies Components may only be used in life-support devices or systems with the express written approval of Infineon Technologies, if a failure of such components can reasonably be expected to cause the failure of that life-support device or system, or to affect the safety or effectiveness of that device or system. Life support devices or systems are intended to be implanted in the human body, or to support and/or maintain and sustain and/or protect human life. If they fail, it is reasonable to assume that the health of the user or other persons may be endangered.