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MAX6682 - Thermistor-to-Digital Converter

Description

The MAX6682 converts an external thermistor’s temperature-dependent resistance directly into digital form.

The thermistor and an external fixed resistor form a voltage-divider that is driven by the MAX6682’s internal voltage reference.

Features

  • o Converts Thermistor Temperature to Digital Data o Low Average Thermistor Current Minimizes SelfHeating Errors o Low Supply Current, 21µA (typ) Including 10kΩ Thermistor Current o Internal Voltage Reference Isolates Thermistor from Power-Supply Noise o 10-Bit Resolution o Accommodates Any Thermistor Temperature Range o Output Data Scaled for Direct Temperature Readings from 0°C to +50°C o Simple SPI-Compatible Interface o Small, 8-Pin µMAX Package MAX6682 Ordering Information PART MAX6682MUA.

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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www.DataSheet4U.com 19-2219; Rev 0; 2/02 Thermistor-to-Digital Converter General Description The MAX6682 converts an external thermistor’s temperature-dependent resistance directly into digital form. The thermistor and an external fixed resistor form a voltage-divider that is driven by the MAX6682’s internal voltage reference. The MAX6682 measures the voltage across the external resistor and produces a 10-bit + sign output code dependent on that voltage. The MAX6682 does not linearize the highly nonlinear transfer function of a typical negative temperature coefficient (NTC) thermistor, but it does provide linear output data over limited temperature ranges when used with an external resistor of the correct value.
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