Overview
The NCT75DR2G, produced by onsemi, is a highly versatile and accurate digital temperature sensor. This device features a 12-bit temperature-to-digital converter and operates over a wide temperature range from −55°C to +125°C. It uses a sigma-delta analog-to-digital converter (ADC) to convert analog temperature measurements into digital form. The NCT75DR2G is designed for various applications requiring precise temperature monitoring and control, including computer thermal monitoring, thermal protection, and system thermal management. It communicates via an SMBus/I2C interface and includes an overtemperature/interrupt output pin for signaling out-of-limit conditions.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Temperature Range | −55 | +125 | °C | |
| Temperature Accuracy (0°C to +70°C) | ±1 | °C | ||
| Temperature Accuracy (−25°C to +100°C) | ±2 | °C | ||
| Temperature Accuracy (−55°C to +125°C) | ±3 | °C | ||
| ADC Resolution | 12 | Bits | ||
| Temperature Resolution | 0.0625 | °C | ||
| Temperature Conversion Time (One-shot Mode) | 48.5 | ms | ||
| Update Rate | 80 | ms | ||
| Supply Voltage | 3.0 | 5.5 | V | |
| Supply Current (Peak) | 0.8 | mA | ||
| Shutdown Current | 3 | μA | ||
| Package Type | 8-lead SOIC |
Key Features
- 12-bit Temperature-to-Digital Converter
- Input Voltage Range from 3.0 V to 5.5 V
- Temperature Range from −55°C to +125°C
- SMBus/I2C Interface
- Overtemperature Indicator
- Support for SMBus/ALERT
- Shutdown Mode for Low Power Consumption
- One-shot Mode
- Available in 8-pin DFN, 8-pin Micro8, and SOIC Packages
- Pb-Free, Halogen Free/BFR Free, and RoHS Compliant
Applications
- Computer Thermal Monitoring
- Thermal Protection
- Isolated Sensors
- Battery Management
- Office Electronics
- Electronic Test Equipment
- Thermostat Controls
- System Thermal Management
Q & A
- What is the temperature range of the NCT75DR2G?
The NCT75DR2G operates over a temperature range from −55°C to +125°C.
- What is the resolution of the temperature-to-digital converter?
The temperature-to-digital converter has a resolution of 12 bits.
- What is the typical supply current of the NCT75DR2G?
The typical supply current is 575 μA at 3.3 V.
- How does the NCT75DR2G communicate with other devices?
The NCT75DR2G communicates via an SMBus/I2C interface.
- What is the purpose of the OS/ALERT pin?
The OS/ALERT pin is used to signal that the programmed temperature limit has been exceeded and can operate in either comparator or interrupt mode.
- Can multiple NCT75DR2G devices be connected to a single bus?
Yes, up to 8 NCT75DR2G devices can be connected to a single bus using the address selection pins A2, A1, and A0.
- What is the shutdown current of the NCT75DR2G?
The typical shutdown current is 3 μA.
- Is the NCT75DR2G RoHS compliant?
Yes, the NCT75DR2G is Pb-Free, Halogen Free/BFR Free, and RoHS compliant.
- What are the available package types for the NCT75DR2G?
The NCT75DR2G is available in 8-lead DFN, 8-lead Micro8, and 8-lead SOIC packages.
- How often does the NCT75DR2G perform a new temperature conversion in normal mode?
In normal mode, the NCT75DR2G performs a new temperature conversion every 80 ms.
