ADI LTC2986HLX#PBF

The LTC2986 measures a wide variety of temperature sensors and digitally outputs results in °C or °F with 0.1°C accuracy and 0.001°C resolution. The LTC2986 can measure the temperature of nearly all standard (Type B, E, J, K, N, S, R, T) or custom thermocouples, with automatic cold junction compensation and linearization of results. In addition, the device can measure temperature using standard 2-wire, 3-wire, or 4-wire RTDs, thermistors, and diodes. The LTC2986 includes excitation current sources and fault detection circuitry for each type of temperature sensor. The LTC2986/LTC2986-1 is a 10-channel, software- and pin-compatible version of the 20-channel LTC2983/LTC2984. Additional features include a special mode for simplified protection in general-purpose multi-sensor applications, custom tables for standard ADC readings, and direct temperature readout from active analog temperature sensors. The LTC2986-1 is the EEPROM version of the LTC2986.

• Direct digitization of 2-wire, 3-wire, or 4-wire RTDs, thermocouples, thermistors, and diodes
• On-chip EEPROM (LTC2986-1) stores channel configuration data and custom coefficients
• 2.85V to 5.25V single supply
• 10 flexible inputs supporting interchangeable use of different sensor types
• Automatic thermocouple cold junction compensation
• Built-in standard and user-programmable coefficients for thermocouples, RTDs, and thermistors
• Negative thermocouple voltage measurement
• Automatic detection of burnout, short circuit, and faults
• Buffered inputs with external protection
• Simultaneous 50Hz/60Hz rejection
• Integrated 15ppm/°C (maximum) voltage reference
• Special protection mode included

• Direct thermocouple measurement
• Direct RTD measurement
• Direct thermistor measurement
• Custom sensor applications