MAX31850TATB+

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Maxim Integrated’s MAX31850TATB+ (or MAX31850), a precision thermocouple-to-digital converter, is designed to provide an accurate linearized temperature measurement. It encompasses the use of an analog circuit and a single-accurate-measurement time-to-digital converter (TDC) to generate an accurate and reliable thermocouple signal.

The MAX31850TATB+ is based on Maxim Integrated’s modern thermocouple-to-digital converter technology, which is optimized for a wide range of temperature measurements. Many of Maxim Integrated’s precision digital temperature sensors are based on this technology. The MAX31850TATB+ combines a high accuracy analog circuit and a single-accurate-measurement TDC for maximum precision of temperature measurement.

The MAX31850TATB+ operates from 2.7V to 5.5V single supply, and is available in the SOT-23-6L package. This device can measure thermocouples spanning a wide range of temperatures. It is suitable for temperature measurement up to 400ºC (752ºF).

Applications:

• Industrial heating and control systems
• Thermocouple thermometers
• Automotive temperature measurement
• Thermally sensitive industrial applications
• Medical equipment

Working Principle:

The MAX31850TATB+ measures the temperature by converting the signal from the thermocouple into digital form. The device includes a precision analog-to-digital converter (ADC) and temperature sensor. The temperature signal is sent to the ADC for conversion and then to output registers for readout. This device also includes a 0.25°C resolution thermocouple offset calibration register and an over-temperature self-protect circuit.

The MAX31850TATB+ features both single-shot and published continuous measurements for consistent readings over temperature and time periods. The single-shot measurement provides the most accurate result, ensuring maximum reliability in harsh environments. The published continuous measurements ensure that the temperature is regularly monitored without waiting for the measurement to complete.

The MAX31850TATB+ also supports an integrator mode. The integrator mode allows for an extension of the measurement range of the device, while reducing the current consumption. In this mode, the ADC is integrated with a single reference voltage to increase the resolution of the device. This mode allows for accurate temperature measurement over the extended temperature range.

The device has an automated shutdown mode that reduces the device’s power consumption and overall system cost. The standby consumption of the MAX31850TATB+ is typically less than 1µA. This is significant when compared to continuous operation, which requires around 15µA. The MAX31850TATB+ includes a built-in temperature sensor to compensate for temperature variations.

In summary, the MAX31850TATB+ is a highly precise thermocouple-to-digital converter designed for a wide range of temperature measurement applications. It has integrated parameters that ensure accuracy, precision and repeatability of temperature measurements over a wide temperature range. In addition, the device features an extended temperature range and low standby consumption for improved system performance and cost savings.

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