Datasheet LTC2984 (Analog Devices) - 3

LTC2984
ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION (Notes 1, 2)
Supply Voltage (VDD) ... –0.3V to 6V TOP VIEW Analog Input Pins (CH1 to CH20, COM) ... –0.3V to (VDD + 0.3V) GND V REF_BYP NC GND V DD GND V DD GND V DD GND V DD GND Input Current (CH1 to CH20, COM) .. ±15mA 12 11 10 9 8 7 6 5 4 3 2 1 Digital Inputs (CS, SDI, SCK, RESET) .. –0.3V to (VDD + 0.3V) VREFOUT 13 48 Q1 Digital Outputs (SDO, INTERRUPT) –0.3V to (V VREFP 14 47 Q2 DD + 0.3V) GND 15 46 Q3 VREFP .. –0.3V to 2.8V CH1 16 45 VDD CH2 17 44 GND Q1, Q2, Q3, LDO, VREFOUT, VREF_BYP (Note 18) CH3 18 43 LDO Reference Short-Circuit Duration ... Indefinite CH4 19 42 RESET CH5 20 41 CS Operating Temperature Range CH6 21 40 SDI CH7 22 39 SDO LTC2984C ...0ºC to 70ºC CH8 23 38 SCK CH9 24 37 INTERRUPT LTC2984I ... –40ºC to 85ºC LTC2984H ...–40ºC to 125ºC 25 26 27 28 29 30 31 32 33 34 35 36 CH10 CH11 CH12 CH13 CH14 CH15 CH16 CH17 CH18 CH19 CH20 COM LX PACKAGE 48-LEAD (7mm × 7mm) PLASTIC LQFP TJMAX = 150°C, θJA = 57°C/W
ORDER INFORMATION LEAD FREE FINISH TRAY PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE
LTC2984CLX#PBF LTC2984CLX#PBF LTC2984LX 48-Lead (7mm × 7mm) LQFP 0°C to 70°C LTC2984ILX#PBF LTC2984ILX#PBF LTC2984LX 48-Lead (7mm × 7mm) LQFP –40°C to 85°C LTC2984HLX#PBF LTC2984HLX#PBF LTC2984LX 48-Lead (7mm × 7mm) LQFP –40°C to 125°C Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container. For more information on lead free part marking, go to: http://www.linear.com/leadfree/ 2984fb For more information www.linear.com/LTC2984 3 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