Datasheet ADT7420 (Analog Devices) - 3

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Data Sheet ADT7420 SPECIFICATIONS
TA = −40°C to +125°C, VDD = 2.7 V to 5.5 V, unless otherwise noted.
Table 1. Parameter Min Typ Max Unit Test Conditions/Comments
TEMPERATURE SENSOR AND ADC Accuracy 1 0.0017 ±0.20 2 °C TA = −10°C to +85°C, VDD = 3.0 V ±0.25 °C TA = −20°C to +105°C, VDD = 2.7 V to 3.3 V ±0.31 °C TA = −40°C to +105°C, VDD = 3.0 V ±0.35 °C TA = −40°C to +105°C, VDD = 2.7 V to 3.3 V ±0.50 °C TA = −40°C to +125°C, VDD = 2.7 V to 3.3 V ±0.50 3 °C TA = −10°C to +105°C, VDD = 4.5 V to 5.5 V ±0.66 °C TA = −40°C to +125°C, VDD = 4.5 V to 5.5 V −0.85 °C TA = +150°C, VDD = 4.5 V to 5.5 V −1.0 °C TA = +150°C, VDD = 2.7 V to 3.3 V ADC Resolution 13 Bits Twos complement temperature value of the sign bit plus 12 ADC bits (power-up default resolution) 16 Bits Twos complement temperature value of the sign bit plus 15 ADC bits (Bit 7 = 1 in the configuration register) Temperature Resolution 13-Bit 0.0625 °C 13-bit resolution (sign + 12-bit) 16-Bit 0.0078 °C 16-bit resolution (sign + 15-bit) Temperature Conversion Time 240 ms Continuous conversion and one-shot conversion modes Fast Temperature Conversion Time 6 ms First conversion on power-up only 1 SPS Conversion Time 60 ms Conversion time for 1 SPS mode Temperature Hysteresis4 ±0.002 °C Temperature cycle = 25°C to 125°C and back to 25°C Repeatability5 ±0.015 °C TA = 25°C Drift 6 0.0073 °C 500 hour stress test at +150°C with VDD = 5.0 V DC PSRR 0.1 °C/V TA = 25°C DIGITAL OUTPUTS (CT, INT, SDA—OPEN DRAIN) High Output Leakage Current, IOH 0.1 5 µA CT and INT pins pulled up to 5.5 V Output Low Voltage, VOL 0.4 V IOL = 3 mA at 5.5 V, IOL = 1 mA at 3.3 V Output High Voltage, VOH 0.7 × VDD V Output Capacitance, COUT 2 pF DIGITAL INPUTS (SCL, SDA, A0, A1) Input Current ±1 µA VIN = 0 V to VDD Input Low Voltage, VIL 0.3 × VDD V SCL and SDA only 0.4 V A0 and A1 only Input High Voltage, VIH 0.7 × VDD V SCL and SDA only 2 V A0 and A1 only SCL, SDA Glitch Rejection 50 ns Input filtering suppresses noise spikes of less than 50 ns Pin Capacitance 2 10 pF POWER REQUIREMENTS Supply Voltage 2.7 5.5 V Supply Current At 3.3 V 210 265 µA Peak current while converting, I2C interface inactive At 5.5 V 250 300 µA Peak current while converting, I2C interface inactive 1 SPS Current At 3.3 V 46 µA VDD = 3.3 V, 1 SPS mode, TA = 25°C At 5.5 V 65 µA VDD = 5.5 V, 1 SPS mode, TA = 25°C Rev. A | Page 3 of 24 Document Outline FEATURES APPLICATIONS GENERAL DESCRIPTION PRODUCT HIGHLIGHTS FUNCTIONAL BLOCK DIAGRAM TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS I2C TIMING SPECIFICATIONS Timing Diagram ABSOLUTE MAXIMUM RATINGS ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS THEORY OF OPERATION CIRCUIT INFORMATION CONVERTER DETAILS NORMAL MODE ONE-SHOT MODE CT and INT Operation in One-Shot Mode 1 SPS MODE SHUTDOWN FAULT QUEUE TEMPERATURE DATA FORMAT TEMPERATURE CONVERSION FORMULAS 16-Bit Temperature Data Format 13-Bit Temperature Data Format 10-Bit Temperature Data Format 9-Bit Temperature Data Format REGISTERS ADDRESS POINTER REGISTER TEMPERATURE VALUE REGISTERS STATUS REGISTER CONFIGURATION REGISTER THIGH SETPOINT REGISTERS TLOW SETPOINT REGISTERS TCRIT SETPOINT REGISTERS THYST SETPOINT REGISTER ID REGISTER SERIAL INTERFACE SERIAL BUS ADDRESS WRITING DATA READING DATA RESET GENERAL CALL INT AND CT OUTPUTS UNDERTEMPERATURE AND OVERTEMPERATURE DETECTION Comparator Mode Interrupt Mode APPLICATIONS INFORMATION THERMAL RESPONSE TIME SUPPLY DECOUPLING POWERING FROM A SWITCHING REGULATOR TEMPERATURE MEASUREMENT QUICK GUIDE TO MEASURING TEMPERATURE OUTLINE DIMENSIONS ORDERING GUIDE