HP03S ETC2 | Alldatasheet
Document overview
- Manufacturer or author: Provided By ALLDATASHEET.COM(FREE DATASHEET DOWNLOAD SITE)
- PDF pages: 7
Technical content
Features
. 14 Bit ADC resolution . Supply voltage 2.2v-3.6v . -40°C to + 85°C operating range . No external components required
Applications
. Pressure measurement and control systems . Mobile altimeter/barometer systems . Weather forecast products . Adventure or multi-mode watches . GPS receivers Block Diagram
Hope RF HP03 Series of calibrated sensor module HP03S 2010-2-3 Version: 1.3 Page 2 of 7 PIN Description Pin Name Pin Number Type Function VSS 6 G power ground VDD 5 P power VCC MCLK 4 I master clock(32k) input XCLR 3 I ADC reset input (keep low when system is in idle state) SDA 2 I/O . I2C data input and output SCL 1 I I2C clock input * XCLR is to reset the AD converter (active low). XCLR should be set to high only during AD conversion phase(reading D1,D2), at all other states, such as reading calibration factors, this pin should be kept low. * The quality of the MCLK signal can significantly influence the current consumption of the pressure module. To obtain minimum current, remember to supply good quality MCLK signal Absolute Maximum Ratings Parameter Symbol Min Max Unit Supply Voltage VDD -0.3 4 V Over pressure P 15 Bar(abs) Storage Temperature Tstg -40 125 °C Recommended Operating Conditions Parameter Symbol Conditions Min Typ Max Unit Supply Voltage VDD 2.2 3 3.6 V Supply Current I VDD=3V V during conversion 500 μΑ Stand by 1 μΑ Operating Pressure Range P 300 1100 hpa (abs) Operating Temperature Range T -40 25 85 °C MCLK T 30 32768 35 KHz Duty Cycle of MCLK 40% 50% 60% % Serial Date Rate SCL 500 KHz Pressure and Temperature Output Characteristics With the calibration data provided by the HP03 system, it should be able to reach the following characteristics: Parameter Symbol Conditions Min Typ Max Unit Absolute Pressure Accuracy HP03SA 750-1100 0～50 -1.5 1.5 hpa Absolute Pressure Accuracy HP03SB 750-1100 0～50 -3.0 3.0 hpa Absolute Pressure Accuracy HP03SA 750-1100 -20～60 -3.0 3.0 hpa Absolute Pressure Accuracy HP03SB 750-1100 -20～60 -5.0 5.0 hpa Long Term Stability 12 month 2 hpa
Hope RF HP03 Series of calibrated sensor module HP03S 2010-2-3 Version: 1.3 Page 3 of 7 VDD Dependency 2.4~3.6 -1.5 0 1.5 hpa Temperature Accuracy 0~+50 -1.0 1.0 °C Temperature Accuracy -20~+60 -2.0 2.0 °C Pressure and Temperature Measurement The main function of HP03 system is to convert the uncompensated pressure and temperature signal from a pressure sensor. After the conversion, the following two values can be obtained: . measured temperature “D2” . measured pressure “D1” As the sensor is strongly temperature dependent, it is necessary to compensate for these effects. Therefore 10 sensor-specific coefficients are stored on the HP03 at our manufacturing facility, and they allow an accurate software compensation in the application. The 7 coefficients are: . Sensitivity coefficient “C1” . Offset coefficient “C2” . Temperature Coefficient of Sensitivity “C3” . Temperature Coefficient of Offset “C4” . Reference Temperature “C5” . Temperature Coefficien t of Temperature “C6” . Offset Fine Tuning “C7” 4 sensor parameter . Sensor Specific Parameter “A,B,C,D” Note: Make sure to pull low XCLR before start to Read these coefficients or the data read out is probably incorrect Parameter Range(Hex:Dec) C1 0x100 -- 0xFFFF : 256 -- 65535 C2 0x00 -- 0x1FFF ; 0 -- 8191 C3 0x00 -- 0x400 ; 0 -- 3000 C4 0x00 -- 0x1000 ; 0 -- 4096 C5 0x1000 -- 0xFFFF ; 4096 -- 65535 C6 0x00 -- 0x4000 ; 0 -- 16384 C7 0x960 -- 0xA28 ; 2400 -- 2600 C,D 0x01 -- 0x0F ; 1 -- 15 A,B 0x01 -- 0x3F ; 1 -- 63 D1 0x00 -- 0xFFFF ; 0 -- 65535 D2 0x00 -- 0xFFFF ; 0 -- 65535
Hope RF HP03 Series of calibrated sensor module HP03S 2010-2-3 Version: 1.3 Page 4 of 7 Pressure and Temperature Calculation: Step 1: (get temperature value) Step 2: (calculate offset, sensitivity and final pressure value) OFF=(C2+(C4-1024)*dUT/2^14)*4 SENS = C1+ C3*dUT/2^10 X= SENS * (D1-7168)/2^14 - OFF P=X*10/2^5+C7
- For altitude measurement system, recommend to use P=X*100/2^5+C7*10
- So that better altitude resolution can be achieved Step 3: (calculate temperature) T = 250 + dUT * C6 / 2 ^ 16-dUT/2^D Example: C1=29908 C2=3724 C3=312 C4=441 C5=9191 C6=3990 C7=2500 A=1 B=4 C=4 D=9 D1=30036 D2=4107 SENS= 29908 + 312 * (-5478) / 2^10 = 28238 X= 28238 * (30036-7168) / 2^14 – 15675 = 23738
Hope RF HP03 Series of calibrated sensor module HP03S 2010-2-3 Version: 1.3 Page 5 of 7 P= 23738 * 10 /2^5 + 2500 = 9918 = 991.8hpa Serial Interface The I2C interface is used for accessing calibration data as well as reading measurement result from AD conversion. The EEPROM and ADC is sharing the same I 2C bus but with different chip address assigned. The EEPROM chip address is set to 0xA1(in the case of read), write operation is not allowed. For AD part, the chip address is set to 0xEE. So this module used two different addresses for calibration data and AD converting data accessing. Calibration EEPROM data read operation is fully compatible to 24C02. Bus drive timing should be referred to the specification of this part as well. Coefficient EEPROM ADDRESS C1(MSB:LSB) (16:17) C2(MSB:LSB) (18:19) C3(MSB:LSB) (20:21) C4(MSB:LSB) (22:23) C5(MSB:LSB) (24:25) C6(MSB:LSB) (26:27) C7(MSB:LSB) (28:29) A (30) B (31) C (32) D (33) AD chip address is set to 0xEE(device write address), 0xEF(device read address). In order to get the AD value D1 and D2, you have to follow the following timing sequence: Pressure Measure: S 11101110 A 11111111 A 11110000 A P D S 11101110 A 11111101 A S 11101111 A MSB A LSB NP Temperature Measure: S 11101110 A 11111111 A 11101000 A P D S 11101110 A 11111101 A S 11101111 A MSB A LSB NP S: start condition P: stop condition A ( bold) : acknowledge from slave A : acknowledge from master N: no acknowledge from master (send out bit 1 instead) D : delay for 40ms minimum MSB: conversion result MSB LSB: conversion result LSB. Remark: Before start an AD conversion cycle, remember to pull high for XCLR pin so that the system is no longer in the reset state.
Hope RF HP03 Series of calibrated sensor module HP03S 2010-2-3 Version: 1.3 Page 6 of 7 All data read from the module is in hex format. After first power on, the first read data should be disregarded, and only the second value should be used. This can assure that any unstable data after reset can be filtered out. Typical Application Circuit Diagram: Mechanical Dimension
Hope RF HP03 Series of calibrated sensor module HP03S 2010-2-3 Version: 1.3 Page 7 of 7 Important Notices Never unplug the module when power is on. Do not use this product as safety or emergency stop device or in any application where failure of this product could lead in personal injury. Failure to comply with these instructions could result with death or serious injury. Should buyer purchase or use HOPE RF products for any such unintended or unauthorized application, buyer should indemnify and hold HOPE RF and its officers, employees, affiliates and distributors harmless against all claims, costs, damages and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury associated with such unintended or unauthorized use, even if such claim alleges that HOPE RF was negligent regarding the design or manufacturing of the part. Hope RF reserves the right, without further notice, to change the product specification and/or information in this document and to improve reliability, functions and design.