Datasheet ADT7302 (Analog Devices) - 3

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ADT7302 SPECIFICATIONS
TA = TMIN to TMAX, VDD = 2.7 V to 5.25 V, unless otherwise noted. All specifications are for −40°C to +125°C, unless otherwise stated.
Table 1. Parameter Min Typ Max Unit Test Conditions/Comments
TEMPERATURE SENSOR AND ADC V = 3.3 V (±10%) and 5 V (±5%) DD Accuracy ±1 ±2 °C T = 0°C to 70°C A ±2.5 °C T = −20°C to +85°C A ±3 °C T = −40°C to +125°C A Temperature Resolution 0.03125 °C Autoconversion Update Rate, t 1.5 sec Temperature measurement every 1.5 second R Temperature Conversion Time 1.2 ms Thermal Time Constant1 2 sec SUPPLIES Supply Voltage 2.7 5.25 V For specified performance Supply Current Normal Mode 1.6 2.2 mA V = 3.3 V, powered up and converting DD 190 300 µA V = 3.3 V, powered up and not converting DD 1.6 2.2 mA V = 5 V, powered up and converting DD 280 400 µA V = 5 V, powered up and not converting DD Shutdown Mode 0.2 1 µA V = 3.3 V, T = 0°C to 70°C DD A 0.4 2 µA V = 5 V, T = 0°C to 70°C DD A 20 µA V = 2.7 V to 5.25 V, T = −40°C to +125°C DD A Power Dissipation Normal Mode (Average) 631 µW V = 3.3 V, autoconversion update, t DD R 1.41 mW V = 5 V, autoconversion update, t DD R Shutdown Mode (Average)2 1 SPS 4.88 µW V = 3.3 V DD 7.4 µW V = 5 V DD 10 SPS 42.9 µW V = 3.3 V DD 65 µW V = 5 V DD 100 SPS 423 µW V = 3.3 V DD 641 µW V = 5 V DD DIGITAL INPUT3 Input High Voltage, V 2.5 V IH Input Low Voltage, V 0.8 V IL Input Current, I ±1 µA V = 0 V to V IN IN DD Input Capacitance, C 10 pF All digital inputs IN DIGITAL OUTPUT3 Output High Voltage, V V − 0.3 V I = I = 200 µA OH DD SOURCE SINK Output Low Voltage, V 0.4 V I = 200 µA OL OL Output Capacitance, C 50 pF OUT 1 The thermal time constant is the time it takes for a temperature delta to change to 63.2% of its final value. For example, if the ADT7302 experiences a thermal shock from 0°C to 100°C, it typically takes 2 seconds for the ADT7302 to reach 63.2°C. 2 The ADT7302 is taken out of shutdown mode and a temperature conversion is immediately performed after this write operation. When the temperature conversion is complete, the ADT7302 is put back into shutdown mode. 3 Guaranteed by design and characterization, not production tested. Rev. B | Page 3 of 16 Document Outline Features Applications Functional Block Diagram General Description Product Highlights Revision History Specifications Timing Characteristics Absolute Maximum Ratings ESD Caution Pin Configurations and Function Descriptions Typical Performance Characteristics Theory of Operation Converter Details Temperature Value Register Temperature Conversion Equations Serial Interface Read Operation Write Operation Applications Information Microprocessor Interfacing ADT7302 to MC68HC11 Interface ADT7302 to 8051 Interface ADT7302 to PIC16C6x/7x and PIC16F873 Interface ADT7302 to ADSP-21xx Interface Mounting the ADT7302 Supply Decoupling Outline Dimensions Ordering Guide