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MCP9701AT-E/TT

MCHPMCP9701AT-E/TT

Microchip Technology
Temperature Sensor Analog, Local -10°C ~ 125°C 19.5mV/°C SOT-23-3
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Overview

The MCP9701AT-E/TT is an analog temperature sensor that converts ambient temperature into a linear voltage output. It features a resolution of 19.5mV/degree C and operates across a wide supply voltage range of 3.1V to 5.5V. This sensor is specifically designed to drive large capacitive loads, making it suitable for systems where the sensor is located remotely from the microcontroller ADC.

Why Choose This Part

The MCP9701AT-E/TT offers a significant advantage with its 19.5mV/degree C slope, providing better signal-to-noise ratio for lower-resolution ADCs compared to standard 10mV/degree C sensors. Its ultra-low 6uA current draw minimizes self-heating errors and extends battery life in portable applications. Additionally, it is optimized to remain stable when driving the large capacitive loads often found in long PCB traces or shielded cables.

Applications

Automotive Thermal Monitoring
Utilizing its AEC-Q100 qualification for monitoring cabin temperature or under-the-hood electronics.
Battery Pack Protection
Monitoring cell temperatures in battery management systems due to its extremely low 6uA typical operating current.
Industrial Process Control
Providing linear feedback for temperature regulation in equipment operating between -10C and 125C.
Handheld Consumer Electronics
Integration into portable devices where low power consumption and small SOT-23 packaging are critical.

Key Specifications

Resolution 19.5mV/degC
Output Type Analog Voltage
Sensor Type Analog, Local
Mounting Type Surface Mount
Package / Case TO-236-3, SC-59, SOT-23-3
Test Condition 0degC ~ 70degC (-10degC ~ 125degC)
Voltage - Supply 3.1V ~ 5.5V
Operating Temperature -40degC ~ 125degC
Supplier Device Package SOT-23-3
Accuracy - Highest (Lowest) +/-2degC (-2degC, +4degC)
Sensing Temperature - Local -10degC ~ 125degC

Getting Started

To evaluate this sensor, connect the VDD and GND pins to a stable DC source between 3.1V and 5.5V and interface the VOUT pin directly to a microcontroller ADC input. Since the output is linear, the temperature can be calculated using a simple linear equation without the complex look-up tables required by thermistors. Use a 0.1uF ceramic bypass capacitor close to the VDD pin to ensure output stability in noisy environments.

Also Consider

MCP9700AT-E/TT MCHPMicrochip Technology - Offers a standard 10mV/degree C output slope for compatibility with systems designed around that scale factor.
TMP36 Analog Devices - A widely used alternative with a 10mV/degree C output and operation down to 2.7V.
LM35DZ TITexas Instruments - Provides a direct Celcius-scaled output (10mV/C) but requires a higher minimum supply voltage of 4V.

Categories

Sensors > Temperature Sensors Automotive > Automotive Sensors