IPPS-015 series Intelligent Pressure Sensor

Transcription

1 DH-074.pdf IPPS-05_ D-074 IPPS-05 series Intelligent Pressure Sensor F eatures A pplications Supply Voltage 2.0 to 3.6V 300 to 00 pressure range Low standby current: <0.µA Factory calibrated and temperature compensated SPI and I2C digital signal output Digital barometer and altimeter Weather forecast station Mobile phones Personal navigation devices PND 6-bits AD convertor with embedded 52 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-05 and do simple calculation according to the factors stored in OTP memory. Therefore using IPPS-05 series is easy to get rid of bothersome calibrations and temperature compensations. IPPS-05 provide SPI or I2C digital The IPPS-05 is a intelligent pressure sensor which consist of a MEMS piezoresistive pressure sensor serial output interface to communicate with and a signal conditioning ASIC. The sensor is formed in microprocessors. IPPS-05 series is specially designed a ultra thin pin LGA package. The package dimension for low voltage and low power consumption concerned is 4.5x4x.mm. The signal conditioning ASIC is a applications. Fig. Functional Block Diagram of IPPS-05 Rev /3/26

2 DH-074.pdf 2 IPPS-05_ D-074 Specifications Parameter Symbol Conditions Min Typ Max Units Notes. Absolute Maximum Ratings V Inputs voltage to VSS Supply Voltage V Storage Temperature Range Maximum Overpressure 2X ESD Rating HBM MM o C Rated pressure V 2. Recommended Operating Conditions Pressure Range Operating Temperature Range Humidity Supply Voltage 0 Isc Iss Iavg Conversion Time tconv conversion/s MCLK=32.76kHz MCLK Duty cycle of MCLK Serial data clock mbar o C 95 %RH V µa µa µa =3V Supply Current Peak Current During Conversion Standby Average External clock signal ms Hz 500 khz SCLK 3. Electrical Parameters Analog to Digital Converter Resolution 6 Bits Output Code Range Integral Nonlinearity LSB TBD Differential Nonlinearity - + LSB TBD 500 khz Digital Interface Digital Inputs Serial data clock Input High Voltage VIH IIH< 5µA 0% Input low Voltage VIL IIL< 5µA 0 20% Input leakage current 0. µa Rise time tr 200 ns Fall time tf 200 ns Digital Outputs Output High Voltage VOH SDO, Isource=0.6mA Output low Voltage VOL SDO, sink=0.6ma 20% Output low Voltage VOL SDI, Isink=.0mA 20% 0% Rise time tr Cload= 50pf 200 ns Fall time tf Cload= 50pf 200 ns Pressure Output Characteristics Resolution Absolute Pressure Accuracy Relative Pressure Accuracy p = Ta = p = Ta = RMS noise4 Noise in pressure Soldering drift Rev /3/26 p = Ta = After solder reflow

3 DH-074.pdf 3 IPPS-05_ D-074 Long term stability 2 months - Recovery time after reflow 7 days Temperature Output Characteristics Resolution to Accuracy Notes. Unless otherwise specified, measurements were taken with a supply voltage of 3 Vdc at a temperature of 25 humidity ranging from 0 95 RH. 2. Maximum error of pressure reading over the pressure range. 3. Maximum error of pressure reading over the pressure range after offset adjustment at one pressure point. 4. The noise data was calculated as standard deviation of 25 data points. 5. Time to recovering >66% impact of solder reflow ±3 and. Pin Configuration and Function Descriptions Fig. 2 Pin configuration of IPPS-05 Pin No. Pin Name Description 2 SCLK/SCL GND External Clock Input. This clock synchronizes serial data I/O. Ground. Chip Select Input. Control data conversion timing and enables the serial input/output register. OTP Programming Voltage. Power Supply. External Clock Input. This clock runs the A/D conversion process. SPI Serial Data Input I2C data I/O SPI Serial Data Output. Data is shifted on the RISING edge of SCLK. This output is high impedance when _ is HIGH VPP MCLK 7 SDI/SDA SDO Note! Pin4 was used only for calibration by the manufacturer and should not be connected. Rev /3/26 3 5

4 DH-074.pdf 4 IPPS-05_ D-074 Ordering information IPPS -05 A I C A B Part No. IPPS-05AI IPPS-05AS Pressure type Absolute Absolute A A Pressure type Absolute C Interface I I2C S SPI Pressure range B Pressure range Digital interface I2C SPI Note Application Information General The I P P S is SIP device consisted of a MEMS pressure sensor and a signal conditioning ASIC. A 6-bits ADC is used to convert analog pressure and temperature signal to a 6-bits digital data. Due to the strong temperature program running at an external microcontroller, this compensation will be performed. Factory calibration microcontroller and calculated by software to correct temperature drift of sensor. Pressure and Temperature Measurement The sequence of reading pressure and temperature as well as software compensatio have to read the 6 bit data for pressure D and temperature D2 Rev /3/26 4. Then, the microcontroller calculate the

5 DH-074.pdf 5 IPPS-05_ D-074 Start Calculate actual temperature Read calibration data from OTP memory of IPPS-05 C, C2,, C0 Calculate compensated pressure Read pressure value from IPPS-05 D Display pressure and temperature value Read temperature value from IPPS-05 D2 Fig. 3 Decoupling Capacitor The decoupling capacitors, 0.µF ceramic plus µf tantalum capacitor, have tobe placed as close as possible to the IPPS-05 and GND pin. This capacitor will stabilize the power supply during data conversion and thus, provide the highest possible accuracy. Application Circuit example Microcontroler IPPS-05 µf 0.µF Fig. 4 Typical application circuit of IPPS-05 in SPI mode Rev /3/26 5

6 DH-074.pdf 6 IPPS-05_ D-074 0k V DD OSC S CLK/ SCL IPPS-05 GND S DO 0k OSC2 Microcontrollor SDI/SDA MCLK GND have to connect to or GND address Fig. 5 Typical application circuit of IPPS-05 in I2C mode Serial Interface The IPPS-05 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-05 have a SPI Serial Peripheral Interface bus to communicate with the microprocessor and other SCLK, SDI, SDO,. Serial Clock Input The SCLK is the serial clock input for the device, and all data transfers (either on SDI or SDO) occur with respect to the SCLK signal. Each bit is shifted out of the SDO pin on the falling edge of SCLK and data is shifted into the SDI pin on the rising edge of SCLK. The SCLK-signal is generated by the microprocessor s system. Chip Select Input The (Chip Select Input) is an active low logic input used to select the IPPS-05. The can be used to select the IPPS-05 in systems with more than one device on the serial bus or as a frame synchronization signal in communicating with the device. can be hardwired low, allowing the IPPS-05 to operate in 3-wire mode with SCLK, SDI, and SDO used to interface with the device. Serial Data Output (SDO) The SDO pin provides the result of the last conversion as a serial bit stream during the data output state. In addition, the SDO pin is used as an end of conversion indicator during the conversion. When is HIGH, the SDO driver is switched to a high impedance state in order to share the data output line with other devices. If is brought LOW during the conversion phase, the SDO pin will be driven HIGH. Once the conversion is complete, if is brought Rev /3/26 6

7 DH-074.pdf 7 IPPS-05_ D-074 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-05 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 is low. Timing Waveform Diagrams Double Byte Packet SCLK SDI 0 B0B0 B9 0 B 0B7 B6 B5 B4 B3 B2 B B0 Start-Bit Setup-Bit Stop-Bit D5D4D3D2 DD0 D9 D D7 D6 D5 D4 D3 D2 D D0 SDO(D) D5D4D3D2 DD0 D9 D D7 D6 D5 D4 D3 D2 D D0 (D: Pressure) SDO(D2) (D2: Temp&2) Conversion Time 34.5ms ( 47 MCLKs) () A/D Conversion Data Acquisition Start of Conversion End of Conversion Fig.6 Double Byte Packet SCLK SDI 0 B0B0 B9 0 B B7 B6 B5 B4 B3 B2 B B0 Start-Bit Setup-Bit 0 Stop-Bit SDO(O) D5 D4 D3 D2 D D0 D9 D D7 D6 D5 D4 D3 D2 D D0 (Odd Address ) SDO(E) D5 D4 D3 D2 D D0 D9 D D7 D6 D5 D4 D3 D2 D D0 (Even Address) (2) OTP Data Acquisition Fig.7 Triple Byte Packet SCLK SDI 0 B50B4 B3 0 B2 B B0 B9 B B7 B6 B5 B4 B3 B2 B B0 SDO DON'T CARE? (3) RESET Sequence Fig. I2C Interface Ty pical I2C communication starts with the start condition and is ended with the stop condition. The device address consisted of six pre-defined bits plus a pin defined bit. The device address is 0C. The value of C is determined by the pin connected with or GND. connected to Rev /3/26 Device address 7

8 DH-074.pdf IPPS-05_ D GND 00 A/D conversion data acquisition Double Byte Packet SCL SDA Device address W Ack Cmd byte Ack Cmd byte Ack S P Conversion Time 34.5ms (47 MCLKs) Start of Conversion End of Conversion SCL SDA Device address R Ack D5 D4 D3 D2 D D0 D9 D Ack D7 D6 D5 D4 D3 D2 D D0 Ack S P () A/D Conversion Data Acquisition From master to slave S: Start condition W: Write=0 ACK: Acknowledge From slave to master P: Stop condition R: Read= ACK: Not acknowledge : = connects to Vdd 0= connects to Gnd Fig. 9 OTP data acquisition Double Byte Packet SCL SDA Device address B W Ack Cmd byte Ack Cmd byte S Ack P SCL SDA Device address B R Ack Dummy byte Ack D5 D4 D3 D2 D D0 D9 D Ack D7 D6 D5 D4 D3 D2 D D0 Ack P S (2) OTP Data Acquisition From master to slave S: Start condition W: Write=0 ACK: Acknowledge From slave to master P: Stop condition R: Read= ACK: Not acknowledge : = connects to Vdd 0= connects to Gnd Fig. 0 Reset sequence Rev /3/26

9 DH-074.pdf 9 IPPS-05_ D-074 Fig. 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. Action Instruction SPI mode I2C mode 0Fh & 5h Conversion start for temperature measurement D2 0Fh & 2h 0Fh & 5h 0Fh & 2h Reset 0Ah & AAh & A0h AAh & AAh Reading coefficient C Ch & 40h 0Eh & 20h Reading coefficient C2 Ch & 50h 0Eh & 2h Reading coefficient C3 Ch & 60h 0Eh & 30h Reading coefficient C4 Ch & 70h 0Eh & 3h Reading coefficient C5 Ch & 0h 0Eh & 40h Reading coefficient C6 Ch & 90h 0Eh & 4h Reading coefficient C7 Ch & A0h 0Eh & 50h Reading coefficient C Ch & B0h 0Eh & 5h Reading coefficient C9 Ch & C0h 0Eh & 60h Reading coefficient C0 Ch & D0h 0Eh & 6h Rev /3/26 9 Conversion start for pressure measurement D

10 DH-074.pdf 0 IPPS-05_ D-074 Start Read calibration data from OTP memory of IPPS-05 C, C2, C3, C4, C5, C6, C7, C, C9, C0 Read pressure value from IPPS-05 D Read temperature value from IPPS-05 D2 0F40h command Reset command Calculate actual temperature dt = D2 C TEMP = (C 2 000) + (C ) dt C3 dt 2 00 Calculate compensated pressure SENS = OFF = (C ) x dt2 02 C6 C7 x dt (C 0000) x dt 2 + (C ) x dt + C 0 P = (OF F D) SENS Display pressure and temperature value Fig. 2 Rev /3/26 0

11 DH-074.pdf IPPS-05_ D-074 Package Outlines Fig. 3 Recommended footprint Unit: mm Fig. 4 Rev /3/26

12 DH-074.pdf 2 Tape specification Reel specification Rev /3/26 IPPS-05_ D-074 2

13 Headquarter Switzerland: Pewatron AG Thurgauerstrasse 66 CH-050 Zurich Phone Office Germany: Pewatron Deutschland GmbH Edisonstraße 6 D-576 Unterschleißheim Phone info.de@pewatron.com We are here for you. Addresses and Contacts. Sales Germany & Austria Postcode Postcode Postcode Austria Postcode Postcode Geometrical sensors Sensor elements Kurt Stritzelberger Gerhard Vetter Thorsten Ravagni Phone Mobile Phone Mobile Phone kurt.stritzelberger@pewatron.com gerhard.vetter@pewatron.com thorsten.ravagni@pewatron.com Sales Switzerland & Liechtenstein Sales International Key Accounts Postcode Postcode Basil Frei Christian Mohrenstecher Peter Felder Phone Mobile Mobile Phone Mobile basil.frei@pewatron.com christian.mohrenstecher@pewatron.com peter.felder@pewatron.com Pressure Sensors Gas sensors / Gas sensor modules Load cells Flow / Level / Medical products Philipp Kistler Phone philipp.kistler@pewatron.com Dr. Thomas Clausen Phone thomas.clausen@pewatron.com Dr. Adriano Pittarelli Phone adriano.pittarelli@pewatron.com Accelerometers / Level Flow sensor elements Power supplies Linear position sensors Angle sensors Thorsten Ravagni Phone thorsten.ravagni@pewatron.com Sebastiano Leggio Phone sebastiano.leggio@pewatron.com Eric Letsch Phone eric.letsch@pewatron.com Drive technology CH Postcode / DE Drive technology CH Postcode / AT / IT / FR Current sensors Power solutions Roman Homa Mobile roman.homa@pewatron.com Christian Mohrenstecher Mobile christian.mohrenstecher@pewatron.com Osman Coban Phone osman.coban@pewatron.com Sales Other Countries / Product Management Sensors Power Solutions - Experts on Design-In