The Boardoza LM75ADP is a compact digital temperature sensor breakout board designed for precise temperature monitoring and thermal protection in embedded systems. Built around NXP’s LM75ADP IC, this module supports I2C communication, features programmable thresholds, and integrates a thermal watchdog capability.
It is ideal for applications requiring accurate temperature sensing in industrial control, consumer electronics, smart devices, or overtemperature protection systems. With its small footprint and high resolution (0.125°C per LSB), the LM75ADP ensures fast and efficient thermal feedback for both data logging and active thermal management systems.
| Front Side | Back Side |
|---|---|
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- Wide Temperature Range: Operates across -55°C to +125°C for industrial and embedded use.
- High Measurement Resolution: Outputs data in 0.125°C increments for accurate sensing.
- Standard I2C Interface: Communicates seamlessly with microcontrollers and processors over I2C (default address 0x48).
- Programmable Thresholds: Configurable high/low alarm limits with interrupt via OS pin.
- Thermal Watchdog: Enables autonomous system protection during overheating events.
- Compact & Low-Power: Minimal footprint and power-efficient for mobile and battery-powered projects.
Model: NXP LM75ADP
Input Voltage: 5V
Functions: Digital temperature sensor
Measurement Range: -55°C to +125°C
Operating Temperature: -55°C ~ +125°C
Interface: I2C (default address: 0x48)
Output Resolution: 0.125°C per bit
Board Dimensions: 20mm x 20mm
| Pin Number | Pin Name | Description |
|---|---|---|
| 1 | VCC | Power Supply +5V |
| 2 | SCL | I2C Serial Clock Line |
| 3 | SDA | I2C Serial Data Line |
| 4 | OS | Overtemperature Shutdown Output |
| 5 | GND | Ground |
| Address Name | Description |
|---|---|
| A0 | Digital input. User-defined address bit 0 |
| A1 | Digital input. User-defined address bit 1 |
| A2 | Digital input. User-defined address bit 2 |
The I2C address can be changed by configuring the A0–A2 pins, allowing up to 8 devices on the same bus. The address pins (A0, A1, A2) are pulled down to GND by default, resulting in the default I²C address of 0x48. You can change the address by shorting the respective address pads on the board to set them to logical 1.
| A2 | A1 | A0 | I²C Address (Hex) |
|---|---|---|---|
| 0 | 0 | 0 | 0x48 (default) |
| 0 | 0 | 1 | 0x49 |
| 0 | 1 | 0 | 0x4A |
| 0 | 1 | 1 | 0x4B |
| 1 | 0 | 0 | 0x4C |
| 1 | 0 | 1 | 0x4D |
| 1 | 1 | 0 | 0x4E |
| 1 | 1 | 1 | 0x4F |
- V1.0.0 - Initial Release
- If you have any questions or need support, please contact support@boardoza.com
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