IPPS-015 series Intelligent Pressure Sensor ■ Features □ Supply Voltage 2.0 to 3.6V □ Factory calibrated and temperature compensated □ SPI and I2C digital signal output The IPPS-015 is a intelligent pressure sensor which consist of a MEMS piezoresistive pressure sensor and a signal conditioning ASIC. The sensor is formed in a ultra thin 8 pin LGA package. The package dimension is 4.5x4x1.1 mm. The signal conditioning ASIC is a ■ Applications □ Digital barometer and altimeter □ Weather forecast station □ Mobile phones □ Personal navigation devices( PND) 16-bits AD convertor with embedded 512 bits OTP memory. The sensor was calibrated and temperature compensated in factory. The factors for temperature compensation were stored in OTP memory. Users can implement temperature compensation via an external micro processor. The external microprocessor read the raw output data from IPPS-015 and do simple calculation according to the factors stored in OTP memory. Therefore using IPPS-015 series is easy to get rid of bothersome calibrations and temperature compensations. IPPS-015 provide SPI or I2C digital serial output interface to communicate with microprocessors. IPPS-015 series is specially designed for low voltage and low power consumption concerned applications. Competitive sensor & power supply solutions worldwide

Competitive sensor & power supply solutions worldwide

Competitive sensor & power supply solutions worldwide

■ Ordering information IPPS -015 A I 11C -A -B ■ Application Information General The IPPS-01 5is SIP device consisted of a MEMS pressure sensor and a signal conditioning ASIC. A 16-bits ADC is used to convert analog pressure and temperature signal to a 16-bits digital data. Due to the strong temperature coefficient of sensor output voltage, it is necessary to be compensated for practical applications. By a dedicated program running at an external microcontroller, this compensation will be performed. Factory calibration Each sensor was individually calibrated in the factory. There are several...

Calculate actual temperature Read calibration data from OTP memory of IPPS-015 C1, C2, ……, C10 Calculate compensated pressure Read pressure value from IPPS-015 D1 Display pressure and temperature value Read temperature value from IPPS-015 D2 Fig. 3 Decoupling Capacitor The decoupling capacitors, 0.1 ceramic plus 1µF tantalum capacitor, have to placed as close as possible to µF be the IPPS-015 VDD and GND pin. This capacitor will stabilize the power supply during data conversion and thus, provide the highest possible accuracy. Application Circuit example Fig. 4 Typical application circuit of IPPS-015...

■ Serial Interface The IPPS-015 can provide two types of serial interfaces as SPI or I2C. The type of serial interface is defined as the device manufactured. The user can't choose the type of serial interface by hardware wiring. So the user have to decide the type of serial interface as ordering the device. ■ SPI Interface The IPPS-015 have a SPI (Serial Peripheral Interface) bus to communicate with the microprocessor and other digital systems. The functional block diagram of MIS-7300 was shown as fig.1. The SPI bus consists of four wires as SCLK, SDI, SDO, CS. Serial Clock Input The SCLK is...

LOW, SDO pin will be driven LOW indicating the conversion is complete and the result is ready to be shifted out of the device. The digital data sent by IPPS-015 SDO pin is either the conversion results or the calibration data stored in OTP. The selection of the output data is done by sending the corresponding instruction on the SDI pin. Serial Data Input (SDI) The SDI pin is used to select the input channel (Pressure or Temperature) and to access the OTP memory. Data is shifted into the device during the data output/input state on the rising edge of SCLK while CS is low. Timing Waveform Diagrams...

GND 1110110 A/D conversion data acquisition Double Byte Packet _ Conversion Time ~ _ ^ 34.5ms (1147 MCLKs) ^ Start of Conversion End of Conversion | | From master to slave S: Start condition W: Write=0 ACK: Acknowledge | | From slave to master P: Stop condition R: Read=1 ACK: Not acknowledge (1) A/D Conversion Data Acquisition Fig. 9 OTP data acquisition Double Byte Packet SCL SDA f" Device address CSB W Ack Cmd byte Ack Cmd byte Ack Dummy byte I | From master to slave | | From slave to master S: Start condition P: Stop condition Reset sequence Competitive sensor & power supply solutions worldwide...

Fig. 11 ■ Pressure and temperature reading instructions Here we will give several examples to introduce reading pressure, temperature and calibration coefficients. All the commands for pressure, temperature and coefficients reading is listed as following table. Competitive sensor & power supply solutions worldwide

Read pressure value from IPPS-015 D1 Read temperature value from IPPS-015 D2 0F40h command Reset command Calculate actual temperature dT = D2 – C1 TEMP = Calculate compensated pressure SENS = Display pressure and temperature value

Competitive sensor & power supply solutions worldwide

■ Tape specification ■ Reel specification Rev. 1.0 2013/3/26 Competitive sensor & power supply solutions worldwide

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