TMP421YZDR

Series:	--
Packaging:	Tape & Reel (TR)
Part Status:	Active
Sensor Type:	Digital, Local/Remote
Sensing Temperature - Local:	-40°C ~ 125°C
Sensing Temperature - Remote:	-64°C ~ 191°C
Output Type:	SMBus
Voltage - Supply:	2.7 V ~ 5.5 V
Resolution:	11 b
Features:	One-Shot, Output Switch, Programmable Limit, Shutdown Mode
Accuracy - Highest (Lowest):	±1.5°C (±2.5°C)
Test Condition:	15°C ~ 85°C (-40°C ~ 125°C)
Operating Temperature:	-40°C ~ 125°C
Mounting Type:	Surface Mount
Package / Case:	8-UFBGA, DSBGA
Supplier Device Package:	8-DSBGA (2.3x1.3)

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Temperature Sensors - Analog and Digital OutputTemperature sensors are essential components used in a variety of applications from medical to industrial. When it comes to temperature sensing, there is a wide range of technologies and options to choose from. This includes analog or digital output, temperature-to-voltage, and thermistors or thermocouples to measure absolute temperature.The TMP421YZDR temperature sensor from Texas Instruments is one such option for temperature sensing that offers an analog and digital output. This versatile sensor operates over a wide temperature range and delivers a high accuracy output for a variety of applications. Let’s take a closer look at the TMP421YZDR temperature sensor and its features and benefits.Overview of TMP421YZDRThe TMP421YZDR digital temperature sensor is highly accurate over a wide temperature range and features a low power 16-bit ADC conversion. The device can deliver a resolution of 13-bit for temperatures ranging from −40°C to +125°C. This versatile sensor be can be interfaced with a variety of circuits including an 8-bit microcontroller.The TMP421YZDR includes three operating modes – low power, power saving, and high performance. In each of the operating modes, there are different temperature resolution settings available to select from 8 to 13 bits. The device also has a selectable alert feature that will notify if the temperature ever exceeds pre-set limits.The TMP421YZDR temperature sensor can provide both analog and digital output. The analog output is a differential output that provides a voltage that represents the temperature. The digital output is an I²C interface that generates a signal that represents the temperature.ApplicationsThe TMP421YZDR’s wide temperature range and accuracy makes it a suitable for a variety of applications from industrial to medical.Industrial useThe TMP421YZDR can be used for monitoring and controlling of temperature in industrial process and machinery. The device can be used to detect and prevent excessive temperatures that can damage sensitive electronic components. It can also be used for monitoring the temperatures of heaters, motors, and other equipment.Medical useThe TMP421YZDR can be used for medical applications such as body temperature monitoring. The device can be used for non-invasive temperature sensing when placed near the skin. It can also be used for regulating temperatures in incubators or operative equipment.Working principleThe working principle of the TMP421YZDR temperature sensor is based on the fact that temperature is a form of energy. When a temperature difference is present between a sensor and its environment, the sensor’s temperature changes. This change is detected by the TMP421YZDR’s thermistor that converts the temperature change into an electric current.The current is then amplified and converted into a voltage by the sensor’s internal amplifier and transducer. This voltage is then fed into an ADC analog-to-digital converter where it is converted into a digital representation of the temperature. The digital output can then be read by a microcontroller or other electronics as an absolute temperature reading.ConclusionThe TMP421YZDR temperature sensor from Texas Instruments offers a highly accurate, low power, and wide temperature range solution for temperature sensing. With features such as an analog and digital output, selectable alert, and adjustable settings, this versatile sensor is suitable for a variety of applications from industrial to medical.

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