产品概览
The PCT2075DP,118 from NXP is an I2C digital temperature sensor with ±1°C accuracy over -25°C to +100°C and 0.125°C resolution. It is a pin-compatible upgrade to the LM75 with improved resolution and programmable OS/OT hysteresis for thermostat control.
主要规格
| 功能 | I2C digital temperature sensor |
| Accuracy | ±1°C (-25 to +100°C) |
| Resolution | 0.125°C (11-bit) |
| Range | -55°C to +125°C |
| Interface | I2C (up to 400 kHz) |
| 电源电压 | 2.7V to 5.5V |
| 包装 | DIP-8 (7.62×6.35mm) |
工作原理
A bandgap temperature sensor outputs a voltage proportional to absolute temperature. A 11-bit delta-sigma ADC digitizes this to 0.125°C resolution. The MSB (8 bits) can be read in a single byte for fast polling. Over-temperature shutdown (OS) output activates when temperature exceeds the programmed threshold, with configurable hysteresis for stable switching.
应用
- System temperature monitor
- Fan control thermostat
- Over-temperature protection
- Environmental monitoring