Datasheet ADT7422 (Analog Devices) - 3

Data Sheet ADT7422 SPECIFICATIONS
TA = −40°C to +125°C, VDD = 2.7 V to 3.3 V, unless otherwise noted.
Table 1. Parameter Symbol Min Typ Max Unit Test Conditions/Comments
TEMPERATURE SENSOR AND ADC Accuracy1 ±0.102 °C TA = 25°C to 50°C, VDD = 3.0 V ±0.25 °C TA = −20°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 ADC Resolution 13 Bits Twos complement temperature value of the sign bit plus 12 ADC bits 16 Bits Twos complement temperature value of the sign bit plus 15 ADC bit Temperature Resolution 13-Bit 0.0625 °C 13-bit resolution (sign + 12 bits) 16-Bit 0.0078125 °C 16-bit resolution (sign + 15 bits) 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 Mode Conversion Time 60 ms Conversion time for 1 SPS mode Temperature Hysteresis3 ±0.002 °C Temperature cycle = 25°C to 125°C to 25°C Repeatability ±0.015 °C TA = 25°C, average of 10 readings Drift4 0.0073 °C 500-hour stress test at 150°C DC Power Supply Rejection Ratio 0.1 °C/V TA = 25°C (PSRR) DIGITAL OUTPUTS (CT, INT, SDA— OPEN-DRAIN) High Output Leakage Current IOH 0.1 5 μA CT pin and INT pin pulled up to VDD Output Low Voltage VOL 0.4 V Low output leakage current (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 Input voltage (VIN) = 0 V to VDD Input Low Voltage VIL 0.3 × V SCL and SDA only VDD 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 and SDA Glitch Rejection 50 ns Input filtering suppresses noise spikes of <50 ns Pin Capacitance 2 10 pF POWER REQUIREMENTS Supply Voltage 2.7 3.0 3.3 V Supply Current 210 265 μA VDD = 3.3 V while converting, I2C inactive 1 SPS Current 46 μA VDD = 3.3 V in 1 SPS mode, TA = 25°C Shutdown Current 2.0 15 μA VDD = 3.3 V Power Dissipation Normal Mode 700 μW VDD = 3.3 V, TA = 25°C Power Dissipation 1 SPS 140 μW VDD = 3.0 V, TA = 25°C Power Dissipation Shutdown Mode 6 μW VDD = 3.0 V, TA = 25°C 1 The accuracy specification includes repeatability. 2 These limits represent a 3-sigma distribution when devices are soldered to the PCB using a 16-point rolling average filter with a 300 ms sample period with the device in continuous conversion mode. 3 The temperature hysteresis specification does not include repeatability. 4 Drift includes solder heat resistance and lifetime test performed as per JEDEC Standard JESD22-A108. Rev. 0 | Page 3 of 23 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 THERMAL RESISTANCE 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 MODE 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