Datasheet LTC2986, LTC2986-1 (Analog Devices) - 5

LTC2986/LTC2986-1
REFERENCE ELECTRICAL CHARACTERISTICS The
l
denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. PARAMETER CONDITIONS MIN TYP MAX UNITS
Output Voltage VREFOUT (Note 10) 2.49 2.51 V Output Voltage Temperature Coefficient I-Grade, H-Grade l 3 15 ppm/°C Output Voltage Temperature Coefficient C-Grade l 3 20 ppm/°C Line Regulation l 10 ppm/V Load Regulation IOUT(SOURCE) = 100µA l 5 mV/mA IOUT(SINK) = 100µA l 5 mV/mA Output Voltage Noise 0.1Hz ≤ f ≤ 10Hz 4 µVP-P 10Hz ≤ f ≤ 1kHz 4.5 µVP-P Output Short-Circuit Current Short VREFOUT to GND 40 mA Short VREFOUT to VDD 30 mA Turn-On Time 0.1% Setting, CLOAD = 1µF 115 µs Long Term Drift of Output Voltage (Note 13) 60 ppm/√kHr Hysteresis (Note 14) ∆T = 0°C to 70°C 30 ppm ∆T = –40°C to 85°C 70 ppm
DIGITAL INPUTS AND DIGITAL OUTPUTS The
l
denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
External SCK Frequency Range l 0 2 MHz External SCK LOW Period l 250 ns External SCK HIGH Period l 250 ns t1 CS↓ to SDO Valid l 0 200 ns t2 CS↑ to SDO Hi-Z l 0 200 ns t3 CS↓ to SCK↑ l 100 ns t4 SCK↓ to SDO Valid l 225 ns t5 SDO Hold After SCK↓ l 10 ns t6 SDI Setup Before SCK↑ l 100 ns t7 SDI HOLD After SCK↑ l 100 ns High Level Input Voltage CS, SDI, SCK, RESET l VDD – 0.5 V Low Level Input Voltage CS, SDI, SCK, RESET l 0.5 V Digital Input Current CS, SDI, SCK, RESET l –10 10 µA Digital Input Capacitance CS, SDI, SCK, RESET 10 pF LOW Level Output Voltage (SDO, INTERRUPT) IO = –800µA l 0.4 V High Level Output Voltage (SDO, INTERRUPT) IO = 1.6mA l VDD – 0.5 V Hi-Z Output Leakage (SDO) l –10 10 µA 29861fa For more information www.linear.com/LTC2986 5 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