China Small Size Ssop-Hybrid Piezoresistive Pressure Sensor

Features
1% maximum error over 0° to 85°C
Temperature compensated over -40°C to +125°C
Small size
High reliability, low drift
Applications Automotive pressure monitoringPneumatic gagesHand-held metersIndustrial controls
Overview
PC28-2400 is a ssop-hybrid device consisting of a piezoresistive pressure sensor and a signal conditioning circuit. The series of pressure sensors have the features of small form, high reliability and high accuracy. The temperature compensated and calibrated sensor provides an accurate, high level analog output signal that is proportional to applied pressure. The pressure range of the sensor cell is 20~400kPa absolute pressure. The supply voltage is 5±0.5V. The supply current is 2.5mA.
PC28 series pressure sensor can customize the characteristics design according to the requirements of customer.

Operating characteristics (Vs=5.0Vdc, TA=25ºC, P1>P2 unless otherwise noted.)
CharacteristicSymbolMinTyp.MaxUnitPressure rangePop20---400kPaSupply voltage (1)Vs4.55.05.5VdcSupply currentIo---2.53mAdcMinimum pressure offset @ Vs=5.0 Volts(3) (0 to 85ºC)(2)VOff0.50.20.25VdcFull scale output @ Vs=5.0 Volts(3) (0 to 85ºC)VFSO4.754.84.85VdcFull scale span @ Vs=5.0 Volts(4) (0 to 85ºC)VFSS4.54.64.7VdcAccuracy(5) (0 to 85ºC)---------±1% VFSSSensitivityV/P---12.1---mV/kPaResponse time (6)tR---2.0---mS

Notes:
1. Device is ratio metric within this specified excitation range.
2. Offset (Voff) is defined as the output voltage at the minimum rated pressure.
3. Full Scale Output (VFSO) is defined as the output voltage at the maximum or full rated pressure.
4. Full Scale Span (VFSS) is defined as the algebraic difference between the output voltage at full rated pressure and the output voltage at the minimum rated pressure.
5. Accuracy is the deviation in actual output from nominal output over the entire pressure range and temperature range as a percent of span at 25ºC due to all sources of error including the following:
Linearity: Output deviation from a straight line relationship with pressure over the specified pressure range.
Temperature Hysteresis: Output deviation at any temperature within the operating temperature range, after the temperature is cycled to and from the minimum or maximum operating temperature points, with zero differential pressure applied.
Pressure Hysteresis: 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.
TcSpan: Output deviation over the temperature range of 0 to 85ºC, relative to 25ºC.
TcOffset: Output deviation with minimum rated pressure applied, over the temperature range of 0 to 85ºC, relative to 25ºC.
Variation from Nominal: The variation from nominal values, for Offset or Full Scale Span, as a percent of VFSS, at 25ºC.
6. Response Time is defined as the time for the incremental change in the output to go from 10% to 90% of its final value when subjected to a specified step change in pressure.
7. Perfluoro silicon resin is applied for long time protection of the sensor from the corrosion of the external medium such as LPG, CNG, gasoline, etc.

Maximum ratings (1)
RatingSymbolValueUnitMaximum pressurePMAX1200kPaMaximum supply voltageVmax-0.3 to 11VdcMaximum supply currentImax14mAdcESD (MIL 883, Method 3015.7) ±4kVStorage temp.TSTG-40ºC to 135ºCºCOperating temp.TA-40ºC to 125ºCºC

1. Exposure beyond the specified limits may cause permanent damage or degradation to the device.

Typical application circuit

Transfer function and characteristic curve

1) Transfer Function
VOUT =Vsx(0.002421xPIN-0.008421)±(Pressure ErrorxTemp. Factorx0.002421xVs)
Vs is the supply power, Volts.
PIN is the pressure, kPa.
2) Output vs. Absolute Pressure (VS=5 Vdc, T=0 to 85ºC)

Figure 3. shows the sensor output signal relative to pressure input. Typical minimum and maximum output curves are shown for operation over 0 to 85ºC temperature range. The output will saturate outside of the rated pressure range.
3) Temperature Error Band

NOTE: The Temperature Multiplier is a linear response from 0°C to -40°C and from 85°C to 125°C
4) Pressure Error Band

Note:The series pressure sensor operating characteristics, internal reliability and qualification tests are based on use of dry air as the pressure media. Media other than dry air may have adverse effects on sensor performance and long-term reliability. Contact the factory for information regarding media compatibility in your application.

Package dimensions (Unit: mm)

Sensor device packaged by SSOP8, dimensional drawings as follows:

Precautions

It is essential to ground machines properly during assembly and handling of the device.The sensor device is shipped in antistatic transport boxes.Any test adapters or production transport boxes used during the assembly of the sensor shall be of an equivalent antistatic material.Do not use ultrasonic welding process to package electronics module.Do not block up the hole on the pressure sensor device.