| Model: | WPAS08 |
| Detection principle: | MEMS |
| Characteristics: | Digital barometer and altimeter, 24-bit ADC, I²C interface, ultra-low power consumption |
| Standard encapsulation: | 2.0 × 2.5 × 1.0mm³ |
| Output signal: | I²C digital pressure and temperature output |
| Pressure Range: | 300～1100hPa |
| Pressure Reference: | Absolute Pressure |
| Working Temperature: | -40～125℃ |
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Description
The WPAS08 series is a digital high-precision barometric pressure sensor and altimeter designed for consumer and portable applications. It combines a MEMS silicon piezoresistive pressure sensor core with a digital signal-conditioning chip and a high-resolution 24-bit ΔΣ ADC.
The sensor stores factory calibration coefficients in non-volatile memory for pressure, temperature, zero-point, sensitivity and linearity compensation. Its I²C interface allows direct communication with an MCU. The low-voltage and low-power design is suitable for battery-powered portable devices.
Application
- Indoor navigation
- 3D outdoor navigation
- Weather forecasting
- Home weather stations
- Portable medical devices
- Vertical speed indication
- Smartphones
- Tablets
- Sports watches
- Model airplanes
- GPS navigation devices
- Outdoor equipment
- Battery-powered portable devices
Features
- Digital barometer and altimeter
- MEMS silicon piezoresistive sensing
- High-resolution 24-bit ADC
- I²C digital interface
- Ultra-low power consumption
- Low standby current
- High pressure resolution
- Low pressure noise
- Factory-calibrated compensation coefficients
- Integrated temperature measurement
- Selectable oversampling rates
- Optional IIR filtering
- Compact 8-pin LGA package
- Metal cap package
- Suitable for battery-powered devices
- RoHS compliant
- Halogen-free
Specifications
| Operating Pressure Range | 300～1100hPa |
| Pressure Reference | Absolute Pressure |
| Supply Voltage | 1.8～3.6V |
| Operating Current | Typical 5.4μA at 1Hz data output rate and minimum oversampling rate |
| Peak Current During Pressure Measurement | Typical 760μA |
| Current During Temperature Measurement | Typical 541μA |
| Standby Current | Typical 0.1μA; Max 0.3μA at 25℃ |
| General Accuracy | ±1%FS at 900～1100hPa and 25～40℃ |
| Zero-point Temperature Coefficient | ±0.3Pa/K; ±2.5cm/K at 200hPa and 25～40℃ |
| Pressure Resolution | 0.095Pa in O4 ultra-high-resolution mode |
| Temperature Resolution | 0.01℃ |
| Pressure Noise | Full bandwidth: 1.0Pa / 8.3cm; minimum bandwidth: 0.2Pa / 1.7cm in O4 ultra-high-resolution mode |
| Temperature Absolute Accuracy | ±0.5℃ at 25℃; ±1.0℃ from 0～60℃ |
| Power Supply Rejection Ratio | ±0.005Pa/mV |
| Long-term Stability | ±1hPa over 12 months |
| Reflow Soldering Drift | -0.5～+1Pa |
| Sampling Rate | Min 157Hz; Typical 182Hz; Max TBD |
| Operating Temperature | -40～125℃ |
| Compensation Temperature | 0～60℃ |
| Storage Temperature | -40～125℃ |
| Maximum Overpressure | 2000hPa |
| ESD Level | ±2kV, Human Body Model |
| Digital Interface | I²C, standard and fast modes |
| I²C Address | 7-bit address 0x78 |
| ADC | 24-bit ΔΣ ADC |
| Package | 8-pin LGA, metal cap |
| Package Size | 2.0 × 2.5 × 1.0mm³ |
| Compliance | RoHS compliant, halogen-free |
* The description and specifications might be changed without notice. Please contact us for the latest information before placing orders.
Technical Support:
Customized technical design and function, LOGO and package are available without extra charge (including molding fee) for mass volume.
The sensors don't have sleeping mode. It can be set in program if needed.
All Winsen products go through strict inspections and tests to make sure they are 100% qualified before shipping out.
The sensor has been fully tested (not calibrated) before leaving the factory, but the module will be calibrated before leaving the factory.
However, after transportation and storage, the environment conditions change, and the surface of the sensor absorbs moisture, mixed gas, pollution matters, etc. It is recommended that customers perform aging and calibration after sensors become stable according to the program and use occasions of the whole device.
15﹪-90﹪RH without condensation,greater or less than this range or long-term high temperature and high humidity will affect the life of the sensor.
Our sensors are certified with CE, 3C, ROHS, anti-explosion, fire prevention, and coal mining safety according to different applications. And we provide assistance for new certification.
Many factors can cause the sensor to fail such as broken wires in transportation, poisoning, falling off of the sensitive material, damage to the heating wire (device), etc. Please find specific cause in each category with Winsen’s aftersales.
Winsen provides professional consultation and service before and after sales. We will recommend the best fitting sensor for your demand. If you have any problem, don’t hesitate to email us to sales@winsensor.com
Due to high volume of daily incoming emails and time zone difference, we may not be able to reply your emails immediately. But we will reply to your inquiry in 24 business hours.
