Datasheet ADT7312 (Analog Devices) - 3

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Data Sheet ADT7312 SPECIFICATIONS
TA = −55°C to +175°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 Accuracy1 ±1.0 °C TA = −55°C to +175°C, VDD = 2.7 V to 3.3 V ±1.1 °C TA = −55°C to +175°C, VDD = 3.3 V to 3.6 V ±1.2 °C TA = +150°C to +175°C, VDD = 4.5 V to 5.5 V ±1.5 °C TA = −55°C to +175°C, VDD = 4.5 V to 5.5 V ADC Resolution 13 Bits Twos complement temperature value of sign bit plus 12 bits (power-on default resolution) 16 Bits Twos complement temperature value of sign bit plus 15 bits (Bit 7 = 1 in the configuration register) Temperature Resolution 13-Bit 0.0625 °C 13-bit resolution (sign bit plus 12 bits) 16-Bit 0.0078 °C 16-bit resolution (sign bit plus 15 bits) Temperature Conversion Time 240 ms Continuous and one-shot conversion modes Fast Temperature Conversion Time 6 ms First conversion on power-up only 1 SPS Conversion Time 60 ms 1 SPS mode Temperature Hysteresis ±0.002 °C Repeatability2 ±0.015 °C TA = 25°C DC PSRR 0.1 °C/V TA = 25°C DIGITAL OUTPUTS (CT, INT) Open-drain outputs High Output Leakage Current, IOH +0.1 ±1 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 (DIN, SCLK, CS) Input Current, IIN ±1 μA VIN = 0 V to VDD Input Low Voltage, VIL 0.4 V Input High Voltage, VIH 0.7 × VDD V Pin Capacitance, CIN 5 10 pF DIGITAL OUTPUT (DOUT) Output High Voltage, VOH VDD − 0.3 V ISOURCE = ISINK = 200 μA Output Low Voltage, VOL 0.4 V IOL = 200 μA Output Capacitance, COUT 50 pF POWER REQUIREMENTS Supply Voltage 2.7 5.5 V Supply Current Peak current while converting; SPI interface inactive Continuous Conversion Mode 245 320 μA VDD = 3.6 V 275 350 μA VDD = 5.5 V 1 SPS Mode 55 μA VDD = 3.6 V, TA = 25°C 70 μA VDD = 5.5 V, TA = 25°C Shutdown Mode 2.5 40 μA VDD = 3.6 V 5.4 50 μA VDD = 5.5 V Power Dissipation Power dissipated for VDD = 3.6 V, TA = 25°C Continuous Conversion Mode 880 μW 1 SPS Mode 200 μW Shutdown Mode 9 μW 1 Accuracy includes lifetime drift. 2 Based on a floating average of 10 readings. Rev. A | Page 3 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 Pad Configuration and Function Descriptions Die Bond Pad Coordinates Typical Performance Characteristics Theory of Operation Circuit Description Converter Architecture Normal Mode (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 Resetting the Serial Interface INT and CT Outputs Undertemperature and Overtemperature Detection Comparator Mode Interrupt Mode Redundant Critical Generator Applications Information Thermal Response Time Supply Decoupling Powering from a Switching Regulator Temperature Monitoring Quick Guide to Measuring Temperature Outline Dimensions Ordering Guide Automotive Products