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High-Precision, Low-Power Digital Temperature Sensor with I2C Interface
The NST5851 is a low-power, high-precision digital temperature sensor, an ideal replacement for negative temperature coefficient (NTC) and positive temperature coefficient (PTC) thermistors. It provides typical accuracy of ±0.2 without the need for calibration or external component signal conditioning. The NST5851 temperature sensor is highly linear, allowing temperature to be known without complex calculations or look-up tables. The on-chip 12-bit analog-to-digital converter (ADC) provides a resolution as low as 0.0625℃. The NST5851 is compatible with SMBus and I2C interfaces, allowing up to 9 devices on a single bus and supporting SMBus alert functionality. The NST5851 operates over a temperature range of -40℃ to 125℃, making it an ideal choice for extended temperature measurements in a variety of communications, computer, consumer, IoT, environmental, industrial, and instrumentation applications. The NST5851 is available in an industry-standard SOT23-6 package.
Product Features
• Maintains high accuracy over the entire temperature range:
- -20℃ to 85℃: ±0.2℃ (typical)
- -40℃ to 125℃: ±1℃ (maximum)
• Highest resolution of 0.0625℃, user-selectable
• Supports 9 device addresses
• Wide power supply voltage range: 1.62V to 5.5V
• Operating current: 30μA (typical)
• Standby current: 0.1μA (typical)
• Digital interface: SMBus, I2C compatible
Application
• System temperature monitoring
• Overheat protection for computer peripherals
• Laptops
• IoT applications
• Communication devices
• Power supply temperature monitoring
• Thermostat control
• Environmental monitoring and HVAC (heating, ventilation, and air conditioning)
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