MAX31911AUI+T

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Introduction

MAX31911AUI+T is a multi-channel, low-power, temperature sensor and detection interface that uses an adaptive I2C bus protocol with internal temperature limits and hysteresis. This device accepts up to four-wire (four-zone) temperature inputs and outputs a temperature reading in Celsius or Fahrenheit. The interface also provides delta-sigma data conversion with a maximum accuracy of 12-bits (±1ºC). This device is based on the MAX31911 family of products and is designed to be used in automotive, medical, industrial, and instrumentation applications.

Application Field

The MAX31911AUI+T is ideal for high-accuracy temperature sensing applications where accuracy and stability of the temperature readings must be maintained. This device is suitable for medical, automotive and industrial applications such as automotive engine cooling systems, air compressors, air-conditioning systems, industrial process control and instrumentation, and vibration and motion sensing. With the ability to detect and accurately measure temperature with a minimum of logic circuitry, the MAX31911AUI+T is an ideal solution for those applications where high accuracy temperature measurements are required.

Working Principle

The MAX31911AUI+T is designed to provide multi-zone temperature detection with a maximum accuracy of 12-bits (±1ºC). The device utilizes an adaptiveI2C bus protocol which allows it to provide temperature sensing from up to four different zones. The temperature from each zone is monitored by the device, and an interrupt is generated if any of the temperature thresholds are exceeded. Data conversion is performed on the measured temperatures and a temperature reading is provided.

The device contains an on-chip temperature sensing circuitry comprised of a temperature-to-voltage converter, amplifier, and internal temperature limits, hysteresis, and compensation for environmental variations. This circuitry allows the device to accurately detect changes in temperature and minimize hysteresis of the measured temperature. In addition, the device contains an adaptive I2C bus interface, allowing the device to accept up to four-wire temperature inputs.

The temperature data is read periodically by the host system via the I2C bus protocol. Any changes in temperature are detected by the device and a temperature reading output is provided. The device also provides delta-sigma data conversion with a maximum accuracy of 12-bits (±1ºC). The device is powered by the I2C bus and requires no additional power supplies.

Conclusions

The MAX31911AUI+T is a low-power, multi-channel temperature sensor and detection interface that is ideal for high-accuracy temperature sensing applications. With its on-chip temperature sensing circuitry, I2C bus protocol, and high accuracy temperature readings, this device is a highly accurate and reliable solution for temperature sensing and detection.

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