LM75AD Analog and Digital Temperature Sensor IC - SOP-8 Package is a digital temperature sensor and thermal watchdog IC designed for accurate temperature monitoring in embedded and electronic systems. It uses an I²C-bus interface to provide digital temperature readings with 11-bit resolution and 0.125°C temperature resolution. The device operates from 2.8 V to 5.5 V, supports programmable over-temperature and hysteresis thresholds, and includes an open-drain over-temperature shutdown output, making it suitable for thermal monitoring, protection, and temperature-controlled applications.
| Parameter | Value |
|---|---|
| Product Type | Digital Temperature Sensor / Thermal Watchdog IC |
| Model | LM75AD |
| Brand | NXP |
| Interface | I²C |
| ADC Resolution | 11 Bit |
| Temperature Resolution | 0.125°C |
| Supply Voltage | 2.8 V to 5.5 V |
| Temperature Range | -55°C to +125°C |
| Accuracy | ±2°C (-25°C to +100°C) |
| Extended Accuracy | ±3°C (-55°C to +125°C) |
| Number of I²C Addresses | 8 |
| Overtemperature Output | Open-Drain OS |
| Shutdown Mode | Yes |
| Operating Supply Current | 100 µA Max. |
| Package | SOP-8 / SO8 |
| Mounting Type | Surface Mount |

| Pin No. | Pin Name | Description |
|---|---|---|
| 1 | SDA | I²C Serial Data Input/Output |
| 2 | SCL | I²C Serial Clock Input |
| 3 | OS | Overtemperature Shutdown Output, Open-Drain |
| 4 | GND | Ground |
| 5 | A2 | I²C Address Selection Input |
| 6 | A1 | I²C Address Selection Input |
| 7 | A0 | I²C Address Selection Input |
| 8 | VCC | Positive Supply Voltage |
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1 × LM75AD Analog and Digital Temperature Sensor IC - SOP-8 Package
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