ADT7461ARZ ON Semiconductor, ADT7461ARZ Datasheet
ADT7461ARZ
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ADT7461ARZ Summary of contents
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ADT7461 +15C Temperature Monitor with Series Resistance Cancellation The ADT7461 is a dual-channel digital thermometer and under/over temperature alarm intended for use in PCs and thermal management systems pin- and register-compatible with the ADM1032. The ADT7461 has three ...
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ON−CHIP TEMPERATURE SENSOR ANALOG ADC MUX BUSY D+ 2 SRC BLOCK D– 3 EXTERNAL DIODE OPEN−CIRCUIT ADT7461 GND DD ABSOLUTE MAXIMUM RATINGS Parameter Positive Supply Voltage ( GND DD D+ D− to GND SCLK, SDATA, ...
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PIN ASSIGNMENT Pin No. Mnemonic 1 V Positive Supply Positive Connection to Remote Temperature Sensor. 3 D− Negative Connection to Remote Temperature Sensor. 4 THERM Open−drain output that can be used to ...
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ELECTRICAL CHARACTERISTICS Parameter Power Supply Supply Voltage Average Operating Supply Current Undervoltage Lockout Threshold Power-On-Reset Threshold Temperature-To-Digital Converter Local Sensor Accuracy Resolution Remote Diode Sensor Accuracy Resolution Remote Sensor Source Current Conversion Time Maximum Series Resistance ...
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D+ TO GND 20 0 – –40 –60 – LEAKAGE RESISTANCE (MΩ) Figure 3. Temperature Error vs. Leakage Resistance 4 40mV NO FILTER 60mV NO FILTER 40mV WITH FILTER 3 ...
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NO FILTER 60mV NO FILTER 40mV WITH FILTER 4 60mV WITH FILTER –1 0 100 200 300 400 FREQUENCY (MHz) Figure 9. Temperature Error vs. Common-Mode Noise Frequency (With and Without R-C-R Filter of ...
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Functional Description The ADT7461 is a local and remote temperature sensor and over/under temperature alarm, with the added ability to automatically cancel the effect (typical) of resistance in series with the temperature monitoring diode. When the ADT7461 ...
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I D+ C1* REMOTE SENSING TRANSISTOR D– Figure 15. Input Signal Conditioning Error vs. Series Resistance Temperature Measurement Results The results of the local and remote temperature measurements are stored in the local and remote temperature value registers and are ...
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Table 2. Temperature Data Format (Local and Remote Temperature High Byte Temperature Binary Offset Binary (Note 1) –55°C 0 000 0000 (Note 2) 0°C 0 000 0000 +1°C 0 000 0001 +10°C 0 000 1010 +25°C 0 001 1001 +50°C ...
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For example, a conversion rate of 8 conversions per second ...
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When Pin 6 is configured as THERM2, only the high temperature limits are relevant. If Flag 6 and/or Flag 4 are set, the THERM2 output goes low to indicate the temperature measurements are outside the programmed limits. Flag 5 and ...
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Table 8. List of Registers Read Address (Hex) Write Address (Hex) Not applicable Not applicable 0x00 Not applicable 0x01 Not applicable 0x02 Not applicable 0x03 0x09 0x04 0x0A 0x05 0x0B 0x06 0x0C 0x07 0x0D 0x08 0x0E Not applicable 0x0F (Note ...
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The number of data bytes that can be transmitted over the serial bus in a single read or write operation is limited ...
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When reading data from a register there are two possibilities the ADT7461’s address pointer register value is unknown or not the desired value necessary to set it to the correct value before data can be read ...
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Sensor Fault Detection At its D+ input, the ADT7461 contains internal sensor fault detection circuitry. This circuit can detect situations where an external remote diode is either not connected or incorrectly connected to the ADT7461. A simple voltage comparator trips ...
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TEMPERATURE 90°C 80°C 70°C 60°C 50°C 40°C 30°C THERM2 1 THERM 2 3 Figure 21. Operation of the THERM and THERM2 Interrupts 1. When the THERM2 limit is exceeded, the THERM2 signal asserts low the temperature continues to ...
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Thermal Inertia and Self-Heating Accuracy depends on the temperature of the remote sensing diode and/or the internal temperature sensor being at the same temperature as the environment being measured; many factors can affect this. Ideally, the sensor should be in ...
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... DIODE ORDERING INFORMATION Device Order Number* Package Description ADT7461AR ADT7461AR−REEL ADT7461AR−REEL7 8−Lead SOIC_N ADT7461ARZ ADT7461ARZ−REEL ADT7461ARZ−REEL7 ADT7461ARM ADT7461ARM−REEL ADT7461ARM−REEL7 ADT7461ARMZ ADT7461ARMZ−REEL 8−Lead MSOP ADT7461ARMZ−R7 ADT7461ARMZ−002 ADT7461ARMZ−2R ADT7461ARMZ−2RL7 †For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging Specifications Brochure, BRD8011/D. *The “ ...
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... G C SEATING PLANE −Z− 0.25 (0.010 *For additional information on our Pb−Free strategy and soldering details, please download the ON Semiconductor Soldering and Mounting Techniques Reference Manual, SOLDERRM/D. PACKAGE DIMENSIONS SOIC−8 NB CASE 751−07 ISSUE 0.10 (0.004 SOLDERING FOOTPRINT* 1 ...
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... A1 8X *For additional information on our Pb−Free strategy and soldering details, please download the ON Semiconductor Soldering and Mounting Techniques Reference Manual, SOLDERRM/D. Protected by US Patents 5,195,827; 5,867,012; 5,982,221; 6,097,239; 6,133,753; 6,169,442; other patents pending. ON Semiconductor and are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC reserves the right to make changes without further notice to any products herein ...