STLM75M2E

Series:	--
Packaging:	Tube
Part Status:	Obsolete
Sensor Type:	Digital, Local
Sensing Temperature - Local:	-55°C ~ 125°C
Sensing Temperature - Remote:	--
Output Type:	I²C/SMBus
Voltage - Supply:	2.7 V ~ 5.5 V
Resolution:	8 b
Features:	Output Switch, Programmable Limit, Shutdown Mode, Standby Mode
Accuracy - Highest (Lowest):	±2°C (±3°C)
Test Condition:	-25°C ~ 100°C (-55°C ~ 125°C)
Operating Temperature:	-55°C ~ 125°C
Mounting Type:	Surface Mount
Package / Case:	8-SOIC (0.154", 3.90mm Width)
Supplier Device Package:	8-SO

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Introduction

Temperature sensors play a key role in modern systems. From everyday applications such as air conditioning systems to critical industrial processes, accuracy and reliability are essential for correct operation. This article will look at the STLM75M2E temperature sensor’s application field and working principle and explain how it belongs to the Temperature Sensors - Analog and Digital Output category.

STLM75M2E Temperature Sensor

The STLM75M2E is a digital temperature sensor in a miniature SOT-23 package. It features an integrated non-linear temperature coefficient DAC (digital-to-analog converter) and an on-chip temperature sensor. It is also able to scan the temperature of up to eight external digital inputs, making it ideal for applications such as industrial processe monitoring, medical equipment, telecom applications, and HVAC/R (heating, ventilation, air-conditioning, and refrigeration). The STLM75M2E uses a single-wire bus interface for its communication with the host. This interface allows for up to nine devices to be connected to the bus. The interface operates as a one-wire master (OWM). The STLM75M2E will constantly monitor the temperature of the nine devices and transmit the data to the host. The STLM75M2E also features a power-save mode. This mode allows the sensor to reduce power consumption when there is no active communication. When the communication link is re-established, the STLM75M2E will once again enter active mode to begin monitoring the temperature of the connected devices.

Working Principle

The STLM75M2E works by converting an analog signal representing the temperature of an object into a digital value. The analog signal is converted by an internal analog-to-digital converter. The digital value is then stored in an internal memory register and sent to the host over the one-wire bus. This digital value is a 12-bit data word representing the temperature of the object. The data is read out over the one-wire bus in a temperature range of -50°C to +150°C with an accuracy of ±0.5°C. The data can be used in any system such as PLCs (programmable logic controllers) or industrial PCs for monitoring and controlling the temperature of objects.

Conclusion

The STLM75M2E is a highly cost-effective and versatile temperature sensor. With its one wire bus interface and its non-linear temperature coefficient DAC, it is ideal for use in a variety of applications such as industrial processing monitoring, medical equipment, telecom applications, and HVAC/R applications. The working principle of the STLM75M2E temperature sensor is to convert an analog signal into a digital value for temperature monitoring, making it part of the Temperature Sensors - Analog and Digital Output category.

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