muRata MTHMR-N-0002A NTC Thermistor Evaluation Board User Guide

June 5, 2024
muRata

NTC Thermistor
Evaluation Board: MTHMR-N-0002A
Quick Start GuidemuRata MTHMR N 0002A NTC Thermistor Evaluation
Board

Evaluation Board: MTHMR-N-0002A

  • The Evaluation Board can be utilized for testing temperature sensors (NTC Thermistor; NXFT-series).
  • It’s a simple way to test temperature sensing by connecting this board with your microcomputer or single-board computer. Because this is an integrated Thermistor and peripheral circuit.

Specifications

  • Rated Voltage: 5V
  • Output signal: analog
  • Dimension: 15×10mm

 NTC Thermistor

muRata MTHMR N 0002A NTC Thermistor Evaluation Board -
fig

A thermistor is a resistive component whose resistance value varies in response to its temperature. NXFT15XH103FA2B030 as a standard item for the starter kit has 10kohm at 25degC.

Hardware & Software Operation

On the board, Vcc (3.3V ~ 5V) is applied to the thermistor and reference register (6.2kohm) and divided voltage is obtained at OUT.
Intaking OUT into ADC port and applying approximation formula, we obtain temperature value.

Calculation Example :
V = V(out) = (ADC_reading / ADC_resolution) Vcc (in case of Arduino : ADC_resolution is 1023, due to 10bit ADC.)
Applox. Formula:
Temp [degC] = -0.30779
V^5 + 4.1545 V^4 – 23.272 V^3 + 68.015 V^2 – 126.35 V + 160.42. (condition : 6.2kohm ref-resistor, 5V input)

Pin Connection

muRata MTHMR N 0002A NTC Thermistor Evaluation Board - Pin
Connection

Pin connection to each CPU board is also instructed in the sample code.

Evaluation Board Arduino UNO
VCC 5V
OUT A0
GND GND

Copyright © Murata Manufacturing Co., Ltd. All rights reserved.
19 June 2017

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