HME Series Amplified pressure sensors

Transcription

1 FEATURE 100 to 10, 1 to 10 psi, gage or differential pressure Increased media compatibility 1 Digital PI bus output Precision AIC signal conditioning Calibrated and temperature compensated DIP housings RoH compliant Quality Management ystem according to IO 18:00 and IO 9001:008 MEDIA COMPATIBILITY 1, High pressure port: To be used with gases and liquids which are compatible with the wetted materials (high temperature polyamide, ceramic AL O, epoxy, fluorosilicone, glass, silicon). Low pressure port: To be used with non-corrosive, non-ionic working fluids such as clean dry air, dry gases and the like. PECIFICATION Maximum ratings upply voltage V HME... HME... Output current ink ource Environmental..... V DC..... V DC max.. V DC 1 ma 1 ma Temperature ranges Compensated C Operating C torage C Humidity limits (non-condensing)...9 %RH 10 (100 % condensing or direct liquid media on high pressure port 1 ) Vibration Mechanical shock max. 10 g, Hz, random (EN 008--) max. 0 g, 11 ms (EN 008--) Lead solder temperature max. 0 C (JED-B10D) ELECTRICAL CONNECTION +Vs 1 HME C MIO CLK GND 100 nf 100 nf E / 1181 / B 1/9

2 PREURE ENOR CHARACTERITIC (T A = C, RH=0 %) Part no. HMEM100U... HMEM100B... HMEM0U... HMEM0B... HMEB001U... HMEB001B... HMEBxU... HMEB00U... HMEB010U... HMEP001U... HMEP001B... HMEP100U... Operating pressure Proof pressure ± ± ± psi 0 psi 0...±1 psi 0 psi psi 00 psi Other pressure ranges (e.g. 00, psi, 10 psi) are available on request. Please contact First ensor. PERFORMANCE CHARACTERITIC (T A = C, RH=0 %, for HME... devices (V =.0 V DC ) digital output signal is non-ratiometric to V in the range of V =... V, for HME... devices (V =.0 V DC ) digital output signal is non-ratiometric to V in the range of V =... V) C haracteristics M in. T yp. Max. Units N on-linearity ( C) ±0. Accuracy ±0. %F 8 Total accuracy ( C) ±1. 9 Response delay 0. ms A/D resolution 1 bit Current consumption HME.... HME.... ma All HME...U... (unidirectional devices) C haracteristics M in. T yp. Max. Zero pressure offset Full scale span (F) 000 Full scale output All HME...B... (bidirectional devices) C haracteristics M in. T yp. Max. Zero pressure offset Full scale span (F) 000 Output at max. specified pressure at min. specified pressure Units counts Units counts E / 1181 / B /9

3 PI - ERIAL PERIPHERAL INTERFACE Introduction The HME is capable to generate a digital output signal. The device runs a cyclic program, which will store a corrected sensor value with 1 bit resolution about every 00 µs within the output registers of the internal AIC. This cyclic program runs independent from the bus communication. In order to use the pressure sensor for digital signal readout, it should be connected to a PI Master device. PI specifies four signals: The clock (CLK) is generated by the master and input to all slaves. MOI carries data from master to slave. MIO carries data from slave back to master. A slave select line () allows individual selection of a slave device. PI Modes A pair of parameters called clock polarity (CPOL) and clock phase (CPHA) determine the edges of the clock signal on which the data are driven and sampled. Each of the two parameters has two possible states, which allows for four possible combinations, all of which are incompatible with one another. In general the HME series supports all combinations of clock phase (CPHA) and polarity (CPOL). By default it is programmed to CPHA = 0 and CPOL = 0, which means that data transmission starts with the rising first clock edge (see Fig 1). lave select The falling edge of the line indicates the beginning of the transfer. Additionally the line must not be negated and reasserted between the three bytes to be transmitted. Data operation The MOI line should always be set to high level. o there is no data transmission from master to slave. Because of internal configuration the slave will answer the first byte with an FFxh. The second and third byte contain the 1 bit pressure information (see Fig. ). For further information please refer to First ensor's PI bus application note CK cycle 1 8 CK (CPOL=0) MOI MB LB MIO MB LB ampling Fig. 1: Example of a standard 1 byte PI data transfer for CPHA=0 and CPOL=0 MOI MIO Data Byte 1 Data Byte Data Byte X X X X X X X X X P1 P1 P1 P11 P10 P9 P8 P P P P P P P1 P0 Relevant data Fig. : byte data stream between HME sensor and master containing the pressure value as a 1 bit information E / 1181 / B /9

4 PI - ERIAL PERIPHERAL INTERFACE (cont.) Interface parameters Parameter Load MIO C IO Input each pin C PI_IN ignal clock frequency f CK MIO hold time after CK sample slope t PI_HD_MI O MOI setup time before CK sample slope tpi_u_mo I / setup time before CK sample slope t PI_U_ / hold time after CK sample slope tpi_hd_ * recommended ymbol M in. T yp. Max. Input high level Input low level 0 10 Output low level 10 Unit % of Vs Pull-up resistor 1 kω M * pf khz ns / fclk 1 ns 1/ fclk Note: First ensor recommends communication speeds of at least 100 khz (max. 0 khz). Please contact us for further information. CK (CPOL=0) t PI_U_ t PI_U_MOI t PI_HD_MIO t PI_HD_ MOI MIO Fig. : Timing characteristics E / 1181 / B /9

5 PHYICAL DIMENION AND ELECTRICAL CONNECTION HME...W1... (DIP, axial no ports) 8 1 Pin Connection 1 +Vs GND C MI O CLK I / C* *Internal connection. Do not connect for any reason first angle projection High pressure dimensions in mm E / 1181 / B /9

6 PHYICAL DIMENION AND ELECTRICAL CONNECTION (cont.) HME...Z... (DIP, 1 port axial, bed) 8 1 Pin Connection 1 +Vs GND C MI O CLK I / C* *Internal connection. Do not connect for any reason High pressure port first angle projection dimensions in mm E / 1181 / B /9

7 PHYICAL DIMENION AND ELECTRICAL CONNECTION (cont.) HME...Z... (DIP, 1 port axial, straight big) 8 1 Pin Connection 1 +Vs GND C MI O CLK I / C* *Internal connection. Do not connect for any reason High pressure port first angle projection dimensions in mm E / 1181 / B /9

8 PHYICAL DIMENION AND ELECTRICAL CONNECTION (cont.) HME...Z... (DIP, 1 port axial, needle big) 8 1 High pressure port Pin Connection 1 +Vs GND C MI O CLK I / C* *Internal connection. Do not connect for any reason dimensions in mm E / 1181 / B 8/9

9 pecification notes: 1. All wetted materials are selected to give a high level of media compatibility. Media compatibility refers to media inside the pressure port and lid. Improved media compatibility on high pressure port (backward side of sensor chip) since media has no contact to electronic components. Nevertheless tests with the media used in the specific application are recommended.. ensor is calibrated in air, changes in sensor behaviour based on physical effects caused by the specific media can occur. Weight of the media and wetting forces can influence the sensor characteristics.. torage temperature of the sensor without package.. Proof pressure is the maximum pressure which may be applied without causing durable shifts of the electrical parameters of the sensing element.. Full cale pan (F) is the algebraic difference between the output signal for the highest and lowest specified pressure.. Non-linearity is the measured deviation based on Best Fit traight Line (BFL).. Accuracy is the combined error from non-linearity and hysteresis. Hysteresis is the maximum output difference at any point within the operating pressure range for increasing and decreasing pressure. 8. Total accuracy is the combined error from offset and span calibration, non-linearity, pressure hysteresis, and temperature effects. Calibration errors include the deviation of offset and full scale from nominal values. 9. Max. delay time between pressure change at the pressure die and signal change at the output. 10. Tested 1h, up to 8 C. ensors are electronic components and should be handled only in ED save environments. NOMENCLATURE Options Example: eries HME M100 Pressure range M0 B001 Bx B00 B010 P001 P100 Calibratio n Housing Porting Grade Voltage B U B idirectional Unidirectiona l ( W) DIP, ports axial opposite side ( 1) no port Barbed H H igh ( ) V V 1 Z D IP, 1 port axial ( ) Needle big. ( ) traight big 10 1 psi 100 psi ( ) available on request. Please contact First ensor. HME M100 U Z H LABEL INFORMATION Digit eries Pressure range Pressure unit / pressure mode / calibration Housing Porting Grade/ voltage Char M E - HME 1 psi U, W DIP, 1 no port - High, V 100 gage/differential, ports axial unidirectional opposite side B arbed / High, V 8 0 B, Z DIP, Needle big A 1 gage/differential, 1 port axial bidirectional traight big B. C L M 100 psi 10 Production code First ensor reserves the right to make changes to any products herein. First ensor does not assume any liability arising out of the application or use of any product or circuit described herein, neither does it convey any license under its patent rights nor the rights of others. E / 1181 / B 9/9