PRESSURE the MEASUREMENT FOR APPLINCES OEM Gauge Pressure Transducer the Type NW302 Pressure range 0 - 4.0 bar pressure transmitter Type NW302 series pressure transducers are designed and manufactured for measuring the hydraulic pressure in heating water NW302 is particularly suitable for application of gas heater. Due to automated testing and compensating we are able to handle customer order in a high volume. ● Best price / performance ratio around world through - integrated our own MEMS & ASIC dies. - optimized mounting - automatic massive production and test ● especially design only for gas heater application . ● The MEMS die includes the well proven SOI technology of Nano MEMS Inc .. Technical Overview Operation Condition Characteristic NW302A5 NW302B3 NW302B4 NW302C5 Units Excitation Voltage 5 ± 0.25 V DC 5 ± 0.25 V DC 5 ± 0.25 V DC 5 ± 0.25 V DC V Pressure Range (differencial) 0 - 4.5 0 - 3.5 0 - 4 0 - 4 .5 bar Type of Pressure Gauge Pressure Proof Pressure 2X 2X 2X 2X Prange Burst Pressure 3X 3X 3X 3X Prange Medium Temperature 0oC - 90oC Ambient Temperature 0oC - 90oC Compensation Temperature 10oC - 80oC Storage Temperature-30oC - 100oC Rated Offset Voltage 1.125 ± 0.105 1.125 ± 0.105 1.125 ± 0.105 0.5 V Rated Span Voltage 3.6 ± 0.24 3.05 ± .02 3.325 4.5 V Electrical Characteristic Pressure Hysteresis 0.05% FS Thermal Accuracy-Zero Offset 0.2 % FS Thermal Accuracy-Span 0.2% FS Long Term Stability (1year) 0.3% Span Total of Linearity, Hysteresis, and repeatability 0.5% FS Resolution 0.1% FS Overall Accuracy 1.5% FS Response Time 2 ms Current Consumption Max. 3 mA (Reference conditions: Supply voltage Vs = 5Vdc; 50% RH; Ambient Temperature T = 25oC) Reference Data (1) Output voltage Drive voltage: 5V DC Temperature: 25oC Applied Pressure: 0 to 300KPa (2) Output accuracy (Offset Voltage) Drive voltage (Rated Output Voltage) Drive voltage: 5V DC Temperature: of - 100oC Applied Pressure: 0 kPa (3) Output accuracy: 5V DC Temperature: 0 - 100oC Applied Pressure: 300KPa pressure of transmitter pressure transmitter pressure transmitter Electrical Characteristics of Pressure Sensor Die (MEMS) (Reference conditions: Supply voltage Vs = 5Vdc; Ambient Temperature Ta = 25oC) Mim Typ Max Unit Note Operating Pressure Range 0 4 bar Operating Temperature Range -40 125 oC Bridge Resistance 4.8 5. 5.2 KΩ Full -Scale Span (FS) 60 80 100 mV Zero Pressure Offset -10 0 10 mV Linearity ± 0.05 ± 0.2% FS 1 Temperature Coefficient of Resistance Span Offset +2400 -1500 -80 +2800 -1900 +3300 -2300 +80 ppm / oC ppm / oC uV / oC 2 Pressure Hysteresis ± 0.05 ± 0.15% FS 3 Repeatability ± 0.1 ± 0.2% FS 4 Temperature Hysteresis 0.3% FS 5 Note: Deviation at one half full-scale pressure from the least squares best line fit over pressure range (0 - 4 Bar) Slope of the endpoint straight line from 25oC to 80oC. Output deviation at any pressure within the specified range, when this pressure is cycled to and from the minimum or maximum rated pressure, at 25oC. Same as 3) after pressure cycles-the Maximum difference in offset after one thermal cycle from-40oC to +125 oC Electrical Architecture of ASIC Pressure Transmitters As shown in the Figure, the chip consists of two dies One is the piezo-resistive bridge And another is circuit. The two parts are bonded together in the single package. The piezo-resistive bridge contains a external temperature sensor. And the circuit mainly contains a internal temperature sensor, a low noise high precision analog front end, a low noise 16-bits sigma-delta ADC, on-chip/or temperature sensor, LDOs, OTP, DAC, register file and I2C interface. Internal clock oscillators and PMU provides flexible settings for low power applications. Some IOs are not bounded out to pins. It includes ( DEBUG0, DEBUG1 and RESET) The IOs are for debugging in bring up stage the the Also IOs the include GND VDRV, INP, INN, TEMPIN bonds First Quotation with piezo-resistive bridge pressure transmitter pressure transmitter, the Package Dimensions NW302A NW302B NW302D pressure transmitter pressure transmitter pressure transmitter pressure transmitter pressure transmitter Pin-Out (for flexible wire) VCC = red OUT 3 = yellow 4 GND = black