If you have more questions or need further information on how to integrate the CPS121 into your projects, feel free to ask!
| Parameter |
Symbol |
Conditions |
Min |
Typ |
Max |
Units |
| Supply Current |
|
|
|
|
|
|
| - Average |
Iavg |
VDD = 3V, one conversion per second |
|
3.95 |
|
µA |
| - During Conversion |
Isc |
VDD = 3V, sensor active |
|
1.5 |
|
mA |
| - Standby (no conversion) |
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 |
ELECTRICAL PARAMETERS
Overview
The CPS121 system-in-a-package (SIP) solution includes a resistive bridge pressure sensor and a 24-bit ADC, providing high resolution and precise pressure measurements. Its fully calibrated and temperature-compensated digital output simplifies integration, making it easy to use. The sensor’s internal calibration logic eliminates the need for external calibration coefficients and compensation calculations by the host microcontroller.
Key Features
- Factory Calibrated: Provides accurate pressure and temperature measurements directly.
- Digital Output: Pressure and temperature data available via I²C interface.
- Low Power Consumption: Suitable for battery-powered applications.
- No External Clock Required: Simplifies system design.
- High Media Resistance: Robust against various sensing media.
Electrical Characteristics
- Supply Voltage: 2V to 5.5V (typically 3V)
- Average Current Consumption: <5 µA per measurement
- Sleep State Current Consumption: <200 nA at 25°C
- Operating Temperature Range: -40°C to +85°C
Measurement Characteristics
- Pressure Absolute Accuracy: ±0.1 kPa (±1.0 mbar) from 0°C to 50°C, 95 kPa to 105 kPa
- Pressure Relative Accuracy: ±0.01 kPa (<1 meter)
- Temperature Accuracy: ±1.0°C
Interfaces
- I²C Interface: Supports data rates up to 400 kHz
Physical Characteristics
- Form Factor: Compact size of 3 x 5 x 1.2 mm (w x l x h)
- Package: LGA package with 8 leads
- Sensing Port: Top side sensing
Applications
- Smartphones: Enhances environmental sensing capabilities.
- Wearables: Suitable for health and fitness tracking devices.
- Altimeters: Provides precise altitude measurements.
- Portable and Stationary Barometers: Measures atmospheric pressure accurately.
- Weather Stations: Essential for meteorological data collection.
- GPS Applications: Improves positional accuracy with altitude data.
- Hard Disk Drives (HDD): Monitors internal pressure to ensure optimal operation.
- Industrial Equipment: Suitable for pressure monitoring and control.
- Air Control Systems: Integral part of systems managing air flow and pressure.
- Vacuum Systems: Monitors and controls pressure in vacuum environments.
Benefits
- Low Power Consumption: Ideal for battery-operated devices.
- Excellent for Battery Applications: Prolongs battery life due to low power usage.
- No External Clock Needed: Simplifies the integration process.
- High Resistance to Sensing Media: Ensures durability in diverse environments.
