Digital Output Factory Calibrated Pressure And Temperature Sensor High Precision
Digital Output Pressure Sensor CPS137 Operating Temperature Range: -40°C To +85° Factory Calibrated Pressure And Temperature Sensor
The CPS137SIP (System-in-a-Package) solution comprises of aresistive bridge type pressure sensor and a 24-bit ADC for high resolution and accurate pressure measurements. The fully calibrated pressure and temperature compensated digital output makes the CPS137 solution simple to use.The CPS137comprises of an internal calibration logic that provides accurate pressure and temperature measurements to the application via I²C interface.There is no need to separately download internal calibration coefficients and have the host micro-controller conduct complicated compensation calculations.
Table 2: I2C COMMANDS
| TYPE | DESCRIPTION |
| Get Data (GD) | Retrieves the sensor measurement data from the internal CPS137 registers*. |
| Measurement Request (MR) | Wakes up the CPS137, performs a sensor measurement, stores the sensor measurement data in internal registers and returns to sleep |
Electrical Parameters
| Parameter | Symbol | Conditions | Min | Typ | Max | Units |
|---|---|---|---|---|---|---|
| Supply Current | ||||||
| - Average | Iavg | VDD = 3V, one conversion/second | 3.95 | µA | ||
| - During Conversion | Isc | VDD = 3V, sensor active | 1.5 | mA | ||
| - Standby | Iss | VDD = 3V, sensor in standby mode | 0.2 | µA | ||
| Analog to Digital Converter | ||||||
| - Resolution | rADC | 24 | Bit | |||
| I²C Interface | ||||||
| - Clock Frequency | FC,I2C | 400 | kHz |
Operating Conditions
| Parameter | Symbol | Conditions | Min | Typ | Max | Units |
|---|---|---|---|---|---|---|
| Pressure Sensor | ||||||
| - Range | 30 | 130 | kPa | |||
| (300) | (1300) | mbar | ||||
| - Resolution | 0.001 | kPa | ||||
| (0.01) | mbar | |||||
| - Accuracy | 70 to 115kPa @ 25°C | -0.15 | ±0.10 | +0.15 | kPa | |
| (-1.5) | (±1.0) | (+1.5) | mbar | |||
| 70 to 115kPa (0°C to 50°C) | -0.2 | ±0.15 | +0.2 | kPa | ||
| (-2.0) | (±1.5) | (+2.0) | mbar | |||
| - Solder Drifts | -0.1 | +0.2 | kPa | |||
| Temperature Sensor | ||||||
| - Range | -40 | 85 | °C | |||
| - Resolution | 0.003 | °C | ||||
| - Accuracy | -40°C to 85°C | -1 | ±0.75 | +1 | °C | |
| Operation | ||||||
| - Supply Voltage to GND | VSUPPLY | 2 | 3.0 | 5.5 | V | |
| - Operating Temperature | -40 | 85 | °C | |||
| - I²C Pull-Up Resistors | RPU | 1 | 2.2 | kΩ |
Absolute Ratings
| Parameter | Symbol | Conditions | Min | Typ | Max | Units |
|---|---|---|---|---|---|---|
| Over Pressure | 2X Full Scale | kPa | ||||
| Supply Voltage (with respect to GND) | VDD | -0.3 | 6.5 | V | ||
| Voltages at Analog and Digital I/O Pins | VA_IO, VD_IO | -0.3 | VDD +0.3 | V | ||
| Storage Temperature | TSTOR | -60 | 150 | °C |
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