MAX6682 - Maxim Integrated Products

MAX6682 Thermistor-to-Digital Converter

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 vol.

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 TEMP RANGE -55°C to +125°C PIN-PACKAGE 8 µMAX Typical Operating Circuit 3.3V Applications HVAC Med.