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Novosense – NST1002: high-precision dual-pin single bus-type Digital Temperature Sensor

Novosense - NST1002: Digitaler Temperatursensor

When selecting a temperature sensor for an application, it may be tempting to opt for an economical option that meets the basic requirements of the electronic product under development. However, it is worth considering that investing in a high-quality sensor could be a game-changer for the final product’s quality.

While some standard digital sensors offer acceptable accuracy for the device’s functionality, their accuracy may be limited to specific temperature ranges and consume more power compared to other options available in the market. Consequently, the lifespan and quality of the product could be significantly affected.

Thermistor or digital temperatursensor?

There are many types of temperature sensors and selecting the appropriate one primarily depends on the application. On the one hand, Thermistors are widely used in medical and industrial applications, among others; however, they might have some drawbacks that need to be considered when using them. First, they are susceptible to self-heating errors, which can lead to inaccurate temperature measurements if not properly accounted for. Second, their resistance change with temperature might be significantly non-linear, which can make it difficult to accurately interpret temperature measurements across a wide temperature range. Finally, NTC thermistors require shielding of power lines to prevent interference and noise that can affect the accuracy of temperature measurements.

Like NTC Thermistors, digital temperature sensors are also attractive for diverse applications in industry and medicine. These sensors offer several advantages, including accuracy, stability, and ease of use, as standard communication protocols can be utilized. Unlike NTC Thermistors, some digital temperature sensors offer better accuracy and higher resolution, such as the NST1002 by Novosense. Its high accuracy can be maintained across a temperature range of -50°C to 150°C, and its 15-bit ADC provides resolutions as precise as 0.0078125°C. Another remarkable advantage of this temperature sensor, among others, is its one-wire interface, allowing for direct connection to the MCU’s GPIO, which simplifies hardware design.

Can the NST1002 be used as a direct replacement for NTC thermistors?

The answer is yes! The NST1002 can serve as a two-wire digital temperature probe or a direct substitute for NTC thermistors (pincompatible 2-Pin packages), making it suitable for various applications, including automotive, industrial, and home appliances.

It is also an ideal solution for low-power applications, such as wireless IoT sensor nodes, due to its low operating current. The NST1002 is available in DFN-2L and TO-92S-2L packages, featuring a pinout with DQ and GND, where DQ functions as both the power supply and digital IO.

One-Wire Communication

Typical applications

  • Single GPIO Usage: Only one GPIO is required in this application, conserving system GPIO resources. The NST1002 will do a reset if DQ is pulled down for more than 5ms.
  • Multipoint Temperature Acquisition: All NST1002 nodes in this configuration utilize GPIO0 as the DQ counting port and share the same pull-up resistor.
  • Two GPIOs for Zero Power Consumption in Standby Mode: The DQ pin is connected to GPIO2 and linked to GPIO1 with a pull-up resistor (Rpu). GPIO1 is set to a high state, providing power through the pull-up resistor Rpu as VDD. GPIO2 serves as the One-Wire communication pin for obtaining temperature data. If the temperature calculation is complete and GPIO1 is pulled down, there is zero power consumption in standby mode.

Did you know that the NST1002 can be used for CGM measurements?

The NST1002 is suitable for sensing real-time fluctuations in ambient temperature or body surface temperature. It can adapt its algorithm to improve the precision of glucose monitoring based on these changes. In this situation, you can position the NST1002 near the skin’s surface to obtain highly accurate body surface temperature readings, which results in more efficient data collection (more here).


  • Operating temperature range: ‒50°C to 150°C
  • High accuracy over ‒50°C to 150°C


     0°C~85°C: ±0.1°C (typical) ±0.25°C(max.)

     -40°C ~125°C: ±0.5°C (max.)

     -40°C ~150°C: ±0.5°C (max.)@3.3V


     0°C~85°C: ±0.2°C (typical)

     -20°C ~85°C: ±0.35°C (max.)

     -40°C ~125°C: ±0.7°C (max.)

     -40°C ~125°C: ±0.7°C (max.) @3.3V

  • High resolution: 0.0078125°C (1 LSB)
  • Quick temperature response: silicone oil τ(63%) = 0.27 sec (DFN2L)
  • Single temperature conversion time: 32ms
  • Ultra-low power consumption: 30µA operating current, 5.4µA Idle current, zero standby power consumption
  • Supply voltage range: 1.7V to 5.5V
  • Single bus protocol digital output, without AD conversion port
  • Support dual pin simplified temperature measurement solution
  • DFN2L ultra small packaging, with same size as 0603 resistance


  • Ammeter
  • Gas meter temperature measurement
  • Intelligent closestool
  • Home appliances
  • Glucometer
  • Digital temperature probe
  • Intelligent wearables
  • Industrial Internet of Things
  • Battery temperature detection

Have you found the perfect solution for your application and would like to get more information? Or are you unsure about what to choose and would prefer to receive some advice from us? If so, please fill out the following form, and we will contact you. We are more than happy to help you!

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