Product Brief
SP37 450kPa
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
LF receiver, the RF transmitter and more in one package requiring only few external
components to complete a TPMS module.
Since 2003, more than 150 million TPMS sensors of our continuously improved
product generations were sold worldwide.
The sensor design of the SP37 is based upon Infineon’s patented bulk micro-
machined sensing technology which allows highly reliable measurements in harsh
environments.
The SP37 measures pressure, radial acceleration, temperature and supply voltage.
The device is compliant to the RoHS standard, with a pressure range from
100 up to 450kPa.
Numerous embedded firmware functions and a development kit enable fast
development cycles.
Pressure sensor with a range
from 100 up to 450kPa
Radial acceleration sensor
Temperature sensor
Supply voltage sensor
Embedded 8051 compatible
8-bit microcontroller
6kB on-chip FLASH memory
256Byte RAM
315 and 434MHz FSK/ASK
RF-transmitter
Selectable output power
of 5 or 8dBm
125kHz ASK high-sensitivity
LF-receiver
Advanced power control/
wake-up system to minimize
battery consumption
Ultra low standby current
TPMS Module
SP37
Pressure
Sensor
Acceleration
Sensor
Temperature
Sensor
Voltage
Sensor
3V Lithium Cell
(< 0.7µA)
Supply voltage range 1.9…3.6V
Operating temperature range
Power Supply Management
-40…125°C
PG-DSOSP-14-6 package
RoHS compliant, green package
ADC
8-bit µC
RF
Transmitter
Tx Data
315/434MHz
Flash
Sensor Calibration
Data & Application
Firmware
ROM
Firmware
Library
LF
Receiver
Rx Data
125kHz
www.infineon.com/sensors
Product Brief
SP37 450kPa
Parameter
Input Pressure Range
Measurement Error
Tire Pressure Sensor
Symbol
Min.
P
in
p
Error
p
Error
p
Error
Input Acceleration Range
Sensitivity Error
Offset Error
a
in
a
Sensitivity
a
Sensitivity
A
Offset
A
Offset
A
Offset
Temperature Measurement Error
T
Error
T
Error
Voltage Measurement Error
V
Error
100
-7
-9
-17.5
-115
-18.75
-24
-6
-8.5
-12
-3
-5
-100
–
–
–
–
–
–
–
–
–
–
–
–
–
Values
Typ.
Max.
450
+7
+9
+17.5
115
+18.75
+24
+6
+8.5
+12
+3
+5
+100
kPa
kPa
kPa
kPa
g
%
%
g
g
g
°C
°C
mV
T = -40...125°C
T = 0...50°C
T = 50...70°C
T = -40...0°C
T = 70...125°C
T = -40...125°C
T = -40...90°C
T = 90...125°C
T = -20...70°C
T = -40...-20°C
T = 70...90°C
T = 90...125°C
T = -20...70°C
T = -40...-20°C
T = 70...125°C
–
Unit
Note/Test Condition
Tighter specifications are available on request.
product summary
Sales Name
SP370-25-106-0
Description
Tire Pressure Sensor
Order Code
SP000934274
Published by
Infineon Technologies AG
85579 Neubiberg, Germany
© 2012 Infineon Technologies AG.
All Rights Reserved.
Visit us:
www.infineon.com
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 warran-
ties and liabilities of any kind, including without limita-
tion 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).
Order Number: B142-H9490-G1-X-7600
Date: 06 / 2012
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 reason-
able to assume that the health of the user or other persons
may be endangered.
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