MAX31855JASA+T

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The MAX31855JASA+T is a 25-pin thermocouple-to-digital converter that is part of the MAX31855 family of products. It is designed for use in applications where the thermocouple signal need to be directly digitized and readout with a microprocessor or microcontroller. The device supports both type K, type J and type T thermocouples. The chip has built-in cold junction compensation, so no external voltage reference is needed to perform temperature measurements.

The device has an SPI/QSPI-compatible four-wire serial interface. It uses an on-chip temperature sensor and an internal reference voltage to detect any thermocouple temperature deviation from open circuit. The temperature sensor is a negative temperature coefficient thermistor that is insensitive to changes in the cold junction temperature. An internal reference voltage is used to obtain accurate temperature readings. The hardware can also be configured to measure differential temperatures.

The device has a programmable temperature measurement resolution of 9 to 12 bits. The maximum sampling rate of 1 kHz allows temperatures to be read at up to 2Hz, giving high accuracy and repeatability. The temperature range is -200°C to +400°C, and accuracy is better than 1°C (±1°C or ±2°F). The chip has a low-power standby mode and provides thermal compensation for the thermocouple. Built-in cold junction compensation is provided for the measurement of temperature from -40°C to +125°C.

The MAX31855JASA+T is suitable for a variety of industrial, commercial, and consumer applications such as food processing, HVAC, automotive and medical. The device is able to measure the temperature accurately and quickly with the wide range of temperature and resolution that it offers. It can be used in both low power and high performance applications. The MAX31855JASA+T is easy to use with its intuitive interface and can be integrated into a design quickly.

The MAX31855JASA+T has no external voltage reference and requires no calibration. Its low-power consumption and small size make it suitable for portable and wearable devices. The device is capable of working with 3-wire and 4-wire thermocouples. Additionally, the chip’s excellent accuracy and temperature range makes it an ideal choice for a variety of applications. This chip can interface with different microprocessors, such as, microcontrollers, and improve the heat management.

In summary, the MAX31855JASA+T is a popular thermocouple-to-digital converter suitable for a wide range of applications. It has a wide temperature range and high accuracy, making it appropriate for use in many industrial and consumer products. The device is easy to use and has no external voltage reference or calibration. Additionally, it is low power and small, making it suitable for use in portable and wearable products.

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