Datasheet ADT7408 (Analog Devices) - 3

Data Sheet ADT7408 SPECIFICATIONS
All specifications TA = −20°C to +125°C, VDD = 3.0 V to 3.6 V, unless otherwise noted.
Table 1. Parameter Symbol Min Typ Max Unit Test Conditions/Comments
TEMPERATURE SENSOR AND ADC Local Sensor Accuracy (C Grade) ±0.5 ±2.0 °C 75°C ≤ TA ≤ 95°C, 3.0 V ≤ VDD ≤ 3.6 V active range ±1 ±3.0 °C 40°C ≤ TA ≤ 125°C, 3.0 V ≤ VDD ≤ 3.6 V monitor range ±1 ±4.0 °C −20°C ≤ TA ≤ 125°C, 3.0 V ≤ VDD ≤ 3.6 V ADC Resolution 12 Bits Temperature Resolution 0.0625 °C Temperature Conversion Time 60 125 ms Long Term Drift 0.081 °C Drift over 10 years, if part is operated at 55°C EVENT# OUTPUT (OPEN DRAIN) Output Low Voltage, VOL 0.4 V IOL = 3 mA Pin Capacitance 10 pF High Output Leakage Current IOH 0.1 1 µA EVENT# = 3.6 V Rise Time1 tLH 30 ns Fall Time1 tHL 30 ns RON Resistance (Low Output)1 15 Ω Supply and temperature dependent DIGITAL INPUTS Input Current IIH, IIL −1 +1 µA VIN = 0 V to VDD Input Low Voltage VIL 0.8 V 3.0 V ≤ VDD ≤ 3.6 V Input High Voltage VIH 2.1 V 3.0 V ≤ VDD ≤ 3.6 V SCL, SDA Glitch Rejection1 50 ns Input filtering suppresses noise spikes of less than 50 ns Pin Capacitance1 10 pF DIGITAL OUTPUT (OPEN DRAIN) Output Low Current IOL 6 mA SDA forced to 0.6 V Output Low Voltage VOL 0.4 V 3.0 V ≤ VDD ≤ 3.6 V at IOPULL_UP = 350 µA Output High Voltage VOH 2.1 V Output Capacitance1 COUT 10 pF POWER REQUIREMENTS Supply Voltage VDD 3.0 3.3 3.6 V Average Supply Current IDD 240 500 µA Supply Current IDD_CONV 360 550 µA Device current while converting Shutdown Mode at 3.3 V 3 20 µA Average Power Dissipation PD 790 µW VDD = 3.3 V, normal mode at 25°C 1 Guaranteed by design and characterization, not production tested. Rev. A | Page 3 of 22 Document Outline FEATURES APPLICATIONS FUNCTIONAL BLOCK DIAGRAM GENERAL DESCRIPTION TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS TIMING CHARACTERISTICS TIMING DIAGRAM ABSOLUTE MAXIMUM RATINGS ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS THEORY OF OPERATION CIRCUIT INFORMATION CONVERTER DETAILS MODES OF OPERATION REGISTERS ADDRESS POINTER REGISTER (WRITE ONLY) CAPABILITY REGISTER (READ ONLY) CONFIGURATION REGISTER (READ/WRITE) TEMPERATURE TRIP POINT REGISTERS Alarm Temperature Upper Boundary Trip Register (Read/Write) Alarm Temperature Lower Boundary Trip Register (Read/Write) Critical Temperature Trip Register (Read/Write) Temperature Value Register (Read Only) ID REGISTERS Manufacturer ID Register (Read Only) Device ID and Revision Register (Read Only) TEMPERATURE DATA FORMAT 12-Bit Temperature Data Format 10-Bit Temperature Data Format EVENT PIN FUNCTIONALITY Event Thresholds Alarm Window Trip Critical Trip Interrupt Mode Comparator Mode SERIAL INTERFACE Serial Bus Address SMBUS/I2C COMMUNICATIONS Writing Data to a Register Reading Data From the ADT7408 Writing to the Pointer Register for a Subsequent Read Reading from Any Pointer Register APPLICATIONS INFORMATION THERMAL RESPONSE TIME SELF-HEATING EFFECTS SUPPLY DECOUPLING TEMPERATURE MONITORING OUTLINE DIMENSIONS ORDERING GUIDE