Datasheet ADT7420 (Analog Devices) - 7

Data Sheet ADT7420 PIN CONFIGURATION AND FUNCTION DESCRIPTIONS NC NC NC NC 16 15 14 13 SCL 1 12 VDD SDA 2 11 GND ADT7420 TOP VIEW A0 3 10 CT (Not to Scale) A1 4 9 INT 5 6 7 8 NC NC NC NC NOTES 1. NC = NO CONNECT. THE NC PIN IS NOT BONDED TO THE DIE INTERNALLY. 2. TO ENSURE CORRECT OPERATION, THE
004
EXPOSED PAD SHOULD EITHER BE LEFT FLOATING OR CONNECTED TO GROUND.
09013- Figure 3. Pin Configuration
Table 4. Pin Function Descriptions Pin No. Mnemonic Description
1 SCL I2C Serial Clock Input. The serial clock is used to clock in and clock out data to and from any register of the ADT7420. Open-drain configuration. A pull-up resistor is required, typically 10 kΩ. 2 SDA I2C Serial Data Input/Output. Serial data to and from the part is provided on this pin. Open-drain configuration. A pull-up resistor is required, typically 10 kΩ. 3 A0 I2C Serial Bus Address Selection Pin. Logic input. Connect to GND or VDD to set an I2C address. 4 A1 I2C Serial Bus Address Selection Pin. Logic input. Connect to GND or VDD to set an I2C address. 5 NC No Connect. The NC pin is not bonded to the die internally. 6 NC No Connect. The NC pin is not bonded to the die internally. 7 NC No Connect. The NC pin is not bonded to the die internally. 8 NC No Connect. The NC pin is not bonded to the die internally. 9 INT Overtemperature and Undertemperature Indicator. Logic output. Power-up default setting is as an active low comparator interrupt. Open-drain configuration. A pull-up resistor is required, typically 10 kΩ. 10 CT Critical Overtemperature Indicator. Logic output. Power-up default polarity is active low. Open-drain configuration. A pull-up resistor is required, typically 10 kΩ. 11 GND Analog and Digital Ground. 12 VDD Positive Supply Voltage (2.7 V to 5.5 V). The supply be decoupled with a 0.1 µF ceramic capacitor to ground. 13 NC No Connect. The NC pin is not bonded to the die internally. 14 NC No Connect. The NC pin is not bonded to the die internally. 15 NC No Connect. The NC pin is not bonded to the die internally. 16 NC No Connect. The NC pin is not bonded to the die internally. 17 EP Exposed Pad. To ensure correct operation, the exposed pad should either be left floating or connected to ground. Rev. A | Page 7 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