LTC2984 TYPICAL APPLICATION 2.85V TO 5.25V SHARE WITH ALL FOUR SETS OF SENSORS 16 2, 4, 6, 8, 45 CH1 VDD 0.1µF THERMOCOUPLE R THERMISTOR 3-WIRE RTD 4-WIRE RTD SENSE 17 48 CH2 Q1 10µF 47 Q2 3 4 2 3 18 46 CH3 Q3 2 10µF LTC2984 1 1 2 19 13 CH4 VREFOUT 1 14 VREFP 20 1µF CH5 21 CH6 11 VREF_BYP 1µF THREE MORE SETS OF UNIVERSAL 22 TO 35 CH7 TO CH20 43 LDO SENSOR INPUTS 36 10µF COM 37 (OPTIONAL DRIVE 42 INTERRUPT LOW TO RESET) RESET 41 1, 3, 5, 7, 9, 12, 15, 44 CS GND 40 SDI SPI INTERFACE 39 SDO 38 SCK 2984 F45 Figure 42. Universal Inputs Allow Common Hardware Sharing for Thermocouples, Diodes,Thermistors, 3-Wire RTDs, and 4-Wire RTDsRELATED PARTS PART NUMBERDESCRIPTIONCOMMENTS LTC2983 Multi-Sensor High Accuracy Digital Pin/Software Compatible to Version of LTC2984 without EEPROM Temperature Measurement System LTC2990 Quad I2C Temperature, Voltage and Remote and Internal Temperatures, 14-Bit Voltages and Current, Internal 10ppm/°C Current Monitor Reference LTC2991 Octal I2C Voltage, Current, Temperature Remote and Internal Temperatures, 14-Bit Voltages and Current, Internal 10ppm/°C Monitor Reference LTC2995 Temperature Sensor and Voltage Monitors Temperature and Two Voltages, Adjustable Thresholds, Open Drain Alert Outputs, Monitor with Alert Outputs Temperature to Voltage Output with Integrated 1.8V Reference, ±1°C (Max) Accuracy LTC2996 Temperature Sensor with Alert Outputs Monitors Temperature, Adjustable Thresholds, Open Drain Alert Outputs, Temperature to Voltage Output with Integrated 1.8V Reference, ±1°C (Max) Accuracy LTC2997 Remote/Internal Temperature Sensor Temperature to Voltage Output with Integrated 1.8V Reference, ±1°C (Max) Accuracy LTC2943 20V I2C Coulomb Counter Monitors Charge, Current, Voltage and Temperature with 1% Accuracy. Works with Any Battery Chemistry and Capacity 2984fb 78 LT 0116 REV B • PRINTED IN USA Linear Technology Corporation 1630 McCarthy Blvd., Milpitas, CA 95Fo 0 r3 m 5- o7re 4 in 17formation www.linear.com/LTC2984 (408) 432-1900 ● FAX: (408) 434-0507 ● www.linear.com/LTC2984 LINEAR TECHNOLOGY CORPORATION 2015 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 EEPROM Characteristics Typical Performance Characteristics Pin Functions Block Diagram Test Circuits Timing Diagram Overview Applications Information EEPROM Overview Eeprom Read/Write Validation EEPROM Write Operation EEPROM Read Operation Thermocouple Measurements Diode Measurements RTD Measurements Thermistor Measurements Supplemental Information Direct ADC Measurements Fault Protection and Anti-Aliasing 2- and 3-Cycle Conversion Modes Running Conversions Consecutively on Multiple Channels Entering/Exiting Sleep Mode MUX Configuration Delay Global Configuration Register Reference Considerations Custom Thermocouples Custom RTDs Custom Thermistors Package Description Revision History Typical Application Related Parts
