Datasheet LTC2986, LTC2986-1 (Analog Devices) - 2

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TABLE OF CONTENTS Features .. 1 Applications ... 1 Typical Application ... 1 Description... 1 Absolute Maximum Ratings ... 3 Order Information ... 3 Pin Configuration ... 3 Complete System Electrical Characteristics .. 4 ADC Electrical Characteristics .. 4 Reference Electrical Characteristics ... 5 Digital Inputs and Digital Outputs .. 5 LTC2986-1 EEPROM Characteristics ... 6 Typical Performance Characteristics .. 7 Pin Functions ...10 Block Diagram ..11 Test Circuits ..12 Timing Diagram ..12 Overview ..13 Applications Information ...17
EEPROM Overview (LTC2986-1) .. 23 EEPROM Read/Write Validation .. 23 EEPROM Write Operation ... 23 EEPROM Read Operation (LTC2986-1) ... 24 Thermocouple Measurements .. 25 Diode Measurements .. 28 RTD Measurements .. 32 Thermistor Measurements .. 51 Global Configuration Register ... 60 Input Overvoltage Protection – Overview.. 60 Active Analog Temperature Sensors ... 66 Direct ADC Measurements .. 70 2- and 3-Cycle Conversion Modes .. 75 Running Conversions Consecutively on Multiple Channels ... 75 Entering/Exiting Sleep Mode ... 76 MUX Configuration Delay .. 76 Reference Considerations ... 76
Custom Thermocouples ...77 Custom RTDs ...80 Custom Thermistors ...83 Package Description ..88 Revision History ...89 Typical Application ..90 Related Parts ...90
29861fa 2 For more information www.linear.com/LTC2986 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Pin Configuration Complete System Electrical Characteristics ADC Electrical Characteristics Reference Electrical Characteristics Digital Inputs and Digital Outputs LTC2986-1 EEPROM Characteristics Typical Performance Characteristics Pin Functions Block Diagram Test Circuits Timing Diagram Overview Applications Information EEPROM Overview (LTC2986-1) EEPROM Read/Write Validation EEPROM Write Operation EEPROM Read Operation (LTC2986-1) Thermocouple Measurements Diode Measurements RTD Measurements Thermistor Measurements Global Configuration Register Input Overvoltage Protection – Overview Active Analog Temperature Sensors Direct ADC Measurements 2- and 3-Cycle Conversion Modes Running Conversions Consecutively on Multiple Channels Entering/Exiting Sleep Mode MUX Configuration Delay Reference Considerations Custom Thermocouples Custom RTDs Custom Thermistors Package Description Revision History Typical Application Related Parts