ADT7320UCPZ AD [Analog Devices], ADT7320UCPZ Datasheet
ADT7320UCPZ
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ADT7320UCPZ Summary of contents
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Preliminary Technical Data FEATURES Temperature accuracy ±0.25°C from −20°C to +105°C 13- or 16-bit user-selectable temperature-to-digital converter Low drift silicon temperature sensor No temperature calibration/correction required by user Power saving 1 sample per second (SPS) mode Fast first conversion on ...
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ADT7320 TABLE OF CONTENTS Features .............................................................................................. 1 Applications ....................................................................................... 1 General Description ......................................................................... 1 Functional Block Diagram .............................................................. 1 Revision History ............................................................................... 2 Specifications ..................................................................................... 3 SPI Timing Specifications ........................................................... 4 Absolute Maximum Ratings ............................................................ 5 ESD Caution .................................................................................. 5 ...
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Preliminary Technical Data SPECIFICATIONS T = −40°C to +125° 2 5.5 V, unless otherwise noted Table 1. Parameter TEMPERATURE SENSOR AND ADC 1 Accuracy ADC Resolution Temperature Resolution 13 Bit 16 Bit Temperature Conversion ...
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ADT7320 Shutdown Current At 3 5.5 V Power Dissipation Normal Mode Power Dissipation 1 SPS 1 Accuracy includes repeatability. 2 The equivalent three-sigma limits are ±0.15°C. This three-sigma specification is provided to enable comparison with other vendors who ...
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Preliminary Technical Data ABSOLUTE MAXIMUM RATINGS Table 3. Parameter V to GND DD DIN Input Voltage to GND DOUT Voltage to GND SCLK Input Voltage to GND CS Input Voltage to GND CT and INT Output Voltage to GND ESD ...
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ADT7320 PIN CONFIGURATION AND FUNCTION DESCRIPTIONS Table 4. Pin Function Descriptions Pin No. Mnemonic Description 1 SCLK Serial Clock Input. The serial clock is used to clock in and clock out data to and from any register of the ADT7320. ...
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Preliminary Technical Data TYPICAL PERFORMANCE CHARACTERISTICS 1.0 0.5 0 –0.5 –1.0 –50 –30 – TEMPERATURE (°C) Figure 4. Temperature Accuracy 1.0 0.5 0 –0.5 –1.0 –50 –30 – TEMPERATURE (°C) Figure ...
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ADT7320 0.30 I CONTINUOUS CONVERSION DD 0.25 0.20 0.15 0.10 I 1SPS DD 0.05 0 2.5 3.0 3.5 4.0 4.5 SUPPLY VOLTAGE (V) Figure 8. Average Operating Supply Current vs. Supply Voltage at 25° ...
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Preliminary Technical Data THEORY OF OPERATION CIRCUIT INFORMATION The ADT7320 is a 13-bit digital temperature sensor that is extendable to 16 bits for greater resolution. An on-board temperature sensor generates a voltage proportional to absolute temperature, which is compared to ...
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ADT7320 CS 0x08 DIN DOUT SCLK Figure 12. Typical SPI One-Shot Write to Configuration Register Followed by a Read from the Temperature Value Register ONE-SHOT MODE Setting Bit and Bit the configuration register ...
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Preliminary Technical Data CT and INT Operation in One-Shot Mode See Figure 13 for more information on one-shot CT pin operation for T overtemperature events when one of the CRIT limits is exceeded. Note that in interrupt mode, a read ...
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ADT7320 CONTINUOUS READ MODE When the command byte = 01010100 (0x54), the contents of the temperature value register can be read out without requiring repeated writes to the communications register. By sending 16 SCLK clocks to the ADT7320, the contents ...
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Preliminary Technical Data TEMPERATURE DATA FORMAT One LSB of the ADC corresponds to 0.0625°C in 13-bit mode. The ADC can theoretically measure a temperature range of 255°C, but the ADT7320 is guaranteed to measure a low value temperature limit of ...
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ADT7320 REGISTERS The ADT7320 contains eight registers: • A status register • A configuration register • Five temperature registers • register The status register, temperature value register, and the ID register are read-only. Table 6. ADT7320 Registers Register ...
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Preliminary Technical Data CONFIGURATION REGISTER This 8-bit read/write register stores various configuration modes for the ADT7320, including shutdown, overtemperature and undertemperature interrupts, one-shot, continuous conversion, interrupt pins polarity, and overtemperature fault queues. Table 8. Configuration Register (Register Address 0x01) Default ...
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ADT7320 TEMPERATURE VALUE REGISTER The temperature value register stores the temperature measured by the internal temperature sensor. The temperature is stored as a 16-bit twos complement format. The temperature is read back from the temperature value register (Register Address 0x02) ...
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Preliminary Technical Data T SETPOINT REGISTER HYST The T setpoint 8-bit register (Register Address 0x05) stores HYST the temperature hysteresis value for the T temperature limits. The temperature hysteresis value is stored in straight binary format using four LSBs. Increments ...
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ADT7320 SERIAL INTERFACE The ADT7320 has a 4-wire serial peripheral interface (SPI). The interface has a data input pin (DIN) for inputting data to the device, a data output pin (DOUT) for reading data back from the device, and a ...
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Preliminary Technical Data WRITING DATA Data is written to the ADT7320 in eight bits or 16 bits, depending on the addressed register. The first byte written to the device is the command byte, with the read/write bit set to 0. ...
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ADT7320 CS SCLK R/W DIN C7 C6 DOUT CS SCLK 8-BIT COMMAND BYTE 0 R/W REGISTER ADDR DIN DOUT READING DATA A read transaction begins when the master ...
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Preliminary Technical Data INT AND CT OUTPUTS The INT and CT pins are open drain outputs, and both pins require a 10 kΩ pull-up resistor UNDERTEMPERATURE AND OVERTEMPERATURE DETECTION The INT and CT pins have two ...
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ADT7320 (COMPARATOR MODE) POLARITY = ACTIVE LOW (INTERRUPT MODE) POLARITY = ACTIVE LOW (COMPARATOR MODE) POLARITY = ACTIVE HIGH (INTERRUPT MODE) POLARITY = ACTIVE HIGH Figure 21. INT Output Temperature Response Diagram for T TEMPERATURE –13°C –14°C –15°C –16°C –17°C ...
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Preliminary Technical Data APPLICATIONS INFORMATION THERMAL RESPONSE TIME The time required for a temperature sensor to settle to a specified accuracy is a function of the thermal mass of the sensor and the thermal conductivity between the sensor and the ...
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... Model Temperature Range ADT7320UCPZ −40°C to +150°C ADT7320UCPZ-R2 −40°C to +150°C ADT7320UCPZ-RL7 −40°C to +150°C EVAL-ADT7X20EBZ RoHS Compliant Part. 2 Maximum accuracy over the −20°C to +105°C temperature range. ©2010 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners ...