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Specifications
SKU: 11263960
| Parameter | Description | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| VDD | Supply Voltage | 2.0 | - | 5.5 | V |
| IDD | Supply Current (Active) | - | 150 | - | μA |
| IDD (Sleep) | Supply Current (Sleep) | - | 0.5 | - | μA |
| TOP | Operating Temperature Range | -40 | - | 125 | °C |
| TA | Ambient Temperature Range | -40 | - | 85 | °C |
| fSCL | I2C Clock Frequency | 100 | - | 400 | kHz |
| VIH | Input High Voltage | 0.7 × VDD | - | VDD - 0.5 | V |
| VIL | Input Low Voltage | 0.3 × VDD + 0.5 | - | 0.8 | V |
| tR | Rise Time | - | 300 | - | ns |
| tF | Fall Time | - | 300 | - | ns |
| tSU | Setup Time | - | 250 | - | ns |
| tHOLD | Hold Time | - | 0 | - | ns |
| tAA | Access Time | - | 1.3 | - | ms |
Instructions for Using SI7148DP-T1-GE3
Power Supply:
- Connect the VDD pin to a stable power supply within the range of 2.0V to 5.5V.
- Ensure the ground (GND) is properly connected to the system ground.
I2C Communication:
- The SI7148DP-T1-GE3 uses I2C communication. Connect the SDA (data) and SCL (clock) pins to the corresponding I2C lines on your microcontroller.
- Use pull-up resistors on both SDA and SCL lines to VDD. Typical values are 4.7kΩ to 10kΩ.
Initialization:
- Send a start condition followed by the device address (0x40) and a write bit.
- Write the configuration register to set the desired operating mode (e.g., continuous measurement, one-shot measurement).
Reading Data:
- To read temperature or humidity data, send a start condition, device address, and a read bit.
- Read the required number of bytes (usually 2 for temperature and 2 for humidity).
- Convert the raw data to temperature or humidity using the provided formulas in the datasheet.
Sleep Mode:
- To enter sleep mode, write the appropriate command to the control register.
- To wake up, send a start condition and the device address.
Error Handling:
- Monitor the status register to check for any errors during communication or measurement.
- Implement error handling routines to manage issues such as NACKs or bus timeouts.
Operating Environment:
- Ensure the device operates within the specified temperature ranges to avoid damage or inaccurate readings.
- Protect the device from moisture and contaminants that could affect its performance.
Power Management:
- Use the sleep mode to minimize power consumption when the sensor is not actively measuring.
- Ensure the power supply is stable and free from noise to maintain accurate measurements.
Software Libraries:
- Consider using software libraries or example code provided by the manufacturer to simplify integration into your project.
Documentation:
- Refer to the datasheet and application notes for detailed information on specific commands, registers, and advanced features.
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