Datasheet ADT7320 (Analog Devices) - 6

ADT7320 Data Sheet PIN CONFIGURATION AND FUNCTION DESCRIPTIONS C C C C N N N N 61 5 3 1 41 1 17 EPAD SCLK 1 12 VDD DOUT 2 ADT7320 11 GND TOP VIEW DIN 3 (Not to Scale) 10 CT CS 4 9 INT 5 6 7 8 C C C C N N N N NOTES 1. NC = NO CONNECT. DO NOT CONNECT TO THIS PIN. THE NC PIN IS NOT BONDED TO THE DIE INTERNALLY. 2. TO ENSURE CORRECT OPERATION, THE EXPOSED PAD SHOULD EITHER BE LEFT FLOATING OR CONNECTED
003 2-
TO GROUND.
901 0 Figure 3. Pin Configuration
Table 4. Pin Function Descriptions Pin No. Mnemonic Description
1 SCLK Serial Clock Input. The serial clock is used to clock data into and out of any register of the ADT7320. 2 DOUT Serial Data Output. Data is clocked out on the SCLK falling edge and is valid on the SCLK rising edge. 3 DIN Serial Data Input. Serial data to be loaded to the control registers of the part is provided on this input. Data is clocked into the registers on the rising edge of SCLK. 4 CS Chip Select Input. The device is enabled when this input is low. The device is disabled when this pin is high. 5 NC No Connect. Do not connect to this pin. The NC pin is not bonded to the die internally. 6 NC No Connect. Do not connect to this pin. The NC pin is not bonded to the die internally. 7 NC No Connect. Do not connect to this pin. The NC pin is not bonded to the die internally. 8 NC No Connect. Do not connect to this pin. The NC pin is not bonded to the die internally. 9 INT Overtemperature and Undertemperature Interrupt. 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 Interrupt. 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). Decouple the supply with a 0.1 μF ceramic capacitor to GND. 13 NC No Connect. Do not connect to this pin. The NC pin is not bonded to the die internally. 14 NC No Connect. Do not connect to this pin. The NC pin is not bonded to the die internally. 15 NC No Connect. Do not connect to this pin. The NC pin is not bonded to the die internally. 16 NC No Connect. Do not connect to this pin. The NC pin is not bonded to the die internally. 17 EPAD Exposed Pad. To ensure correct operation, the exposed pad should either be left floating or connected to ground. Rev. 0 | Page 6 of 24 Document Outline FEATURES APPLICATIONS GENERAL DESCRIPTION PRODUCT HIGHLIGHTS FUNCTIONAL BLOCK DIAGRAM TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS SPI TIMING SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS THEORY OF OPERATION CIRCUIT INFORMATION CONVERTER DETAILS CONTINUOUS CONVERSION 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 STATUS REGISTER CONFIGURATION REGISTER TEMPERATURE VALUE REGISTER ID REGISTER TCRIT SETPOINT REGISTER THYST SETPOINT REGISTER THIGH SETPOINT REGISTER TLOW SETPOINT REGISTER SERIAL INTERFACE SPI COMMAND BYTE WRITING DATA READING DATA INTERFACING TO DSPs OR MICROCONTROLLERS SERIAL INTERFACE RESET 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