Datasheet ADT75 (Analog Devices)

±1°C Accurate, 12-Bit Digital Temperature Sensor Data Sheet ADT75 FEATURES PRODUCT HIGHLIGHTS 12-bit temperature-to-digital converter
1. On-chip temperature sensor al ows an accurate measurement
B grade accuracy ±1.0°C from 0°C to 70°C
of the ambient temperature. The measurable temperature
A grade accuracy ±2.0°C from −25°C to +100°C
range is −55°C to +125°C.
SMBus/I2C-compatible interface
2. Supply voltage is 2.7 V to 5.5 V.
Operation from −55°C to +125°C
3. Space-saving, 8-lead MSOP and 8-lead SOIC.
Operation from 2.7 V to 5.5 V
4. Temperature accuracy is ±1°C maximum.
Overtemperature indicator
5. Temperature resolution is 0.0625°C.
Shutdown mode for low power consumption
6. Shutdown mode reduces the current consumption to
Power consumption 79 µW typically at 3.3 V
3 µA typical.
Small, low cost 8-lead MSOP in Pb-Sn and Pb-free packages
7. Connect up to eight ADT75s to a single SMBus/I2C bus.
Standard 8-lead SOIC Pb-free package APPLICATIONS Isolated sensors Environmental control systems Computer thermal monitoring Thermal protection Industrial process control Power-system monitors Hand-held applications FUNCTIONAL BLOCK DIAGRAM VDD 8 DIGITAL 12-BIT COMPARATOR 3 OS/ALERT DECIMATOR LPF TEMPERATURE SENSOR 1-BIT TEMPERATURE SENSOR REGISTER + – CONFIGURATION REFERENCE Σ-Δ REGISTER 1-BIT DAC THYST SETPOINT REGISTER CLK AND TIMING GENERATION TOS SETPOINT POINTER REGISTER REGISTER A0 7 1 SDA A1 6 SMBus/I2C INTERFACE 2 SCL A2 5
001
4 GND
05326- Figure 1.
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Document Outline Features Applications Product Highlights Functional Block Diagram Table of Contents Revision History General Description Specifications A Grade B Grade Timing Specifications and Diagram Absolute Maximum Ratings ESD Caution Pin Configuration and Function Descriptions Typical Performance Characteristics Theory of Operation Circuit Information Converter Details Functional Description Temperature Data Format Temperature Conversion Formulas One-Shot Mode Fault Queue Registers Address Pointer Register Temperature Value Register Configuration Register THYST Setpoint Register TOS Setpoint Register Serial Interface Serial Bus Address Writing Data Writing to the Address Pointer Register for a Subsequent Read Writing Data to a Register Reading Data OS/Alert Output OverTemperature Modes Comparator Mode Interrupt Mode SMBus Alert Applications Information Thermal Response Time Self-Heating Effects Supply Decoupling Temperature Monitoring Outline Dimensions Ordering Guide