ADM1034ARQZ-R7 ON Semiconductor, ADM1034ARQZ-R7 Datasheet

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ADM1034 Thermal Monitor and Fan Speed (RPM) Controller The ADM1034 is a dual−channel remote− and local−temperature sensor and fan controller. The remote channels monitor the temperature of two remote thermal diodes, which may be discrete 2N3904/6s or may be located ...

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ADM1034 MANUAL FAN SPEED CONTROL TEMPERATURE−TO− FAN−SPEED LOOK−UP TABLE DRIVE1 1 FAN SPEED FAN RESPONSE CONTROLLER 3 DRIVE2 TACH1 2 TACH SIGNAL CONDITIONING TACH2 4 8 REF LOCATION 13 D1– 9 ANALOG MULTIPLEXER D1+ 10 SRC BLOCK D2– 11 D2+ ...

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ABSOLUTE MAXIMUM RATINGS Parameter Positive Supply Voltage ( Voltage on Any Input or Output Pin except FAN_FAULT and LOCATION Voltage on FAN_FAULT (Note 1) Voltage on LOCATION Input Current at Any Pin Maximum Junction Temperature (T max) J ...

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ELECTRICAL CHARACTERISTICS Parameter Power Supply Supply Voltage, V (Note 2) CC Supply Current Undervoltage Lockout Threshold Power−On Reset Threshold Temperature−to−Digital Converter Internal Sensor Accuracy Resolution External Diode Sensor Accuracy Resolution Remote Sensor Source Current Series Resistance Cancellation Power ...

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ELECTRICAL CHARACTERISTICS Parameter AGTL + INPUT (THERM) Input High Level Input Low Level Tachometer Accuracy Fan Speed Measurement Accuracy SERIAL BUS TIMING (Note 4) Clock Frequency, f SCLK Glitch Immunity Bus Free Time, t BUF Start Setup Time, ...

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D+ TO GND –20 –40 –60 –80 –100 LEAKAGE RESISTANCE (MΩ) Figure 3. Temperature Error vs. PCB Track Resistance DXP to GND and V 100 ...

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USL 0.5 0 –0.5 MEAN –1.0 LSL –1.5 –60 –40 – ACTUAL TEMPERATURE (° Figure 9. Remote ...

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DEV 31 400 DEV 32 DEV 33 200 0 0.01 0.1 1 CONVERSION RATE (Hz) Figure 13. Supply Current vs. Conversion Rate Functional Description The ADM1034 is a local− and remote−temperature monitor and fan controller for ...

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V CC ADM1034 1 ARP LOCATION = 111 1.5kΩ ADM1034 2 ARP LOCATION = 110 1kΩ ADM1034 3 ARP LOCATION = 101 1kΩ ADM1034 4 ARP LOCATION = 100 1kΩ ADM1034 5 FD ADDRESS = 53h 1kΩ ADM1034 6 FD ...

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Table 3. UDID Values Bit No. Name <127:120> Device Capabilities <119:112> Version/Revision <111:96> Vendor ID <95:80> Device ID <79:64> Interface <63:48> Subsystem Vendor ID <47:32> Subsystem Device ID <31:0> Vendor Specific ID SMBus 2.0 Fixed and Discoverable Mode The ADM1034 ...

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ADM1034 as before, but send only the data byte containing the register. (See Figure 18.) A read operation is then performed, using the serial bus address and the R/W bit set to 1, followed by the data byte read from ...

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Write Operations The SMBus specifications define protocols for read and write operations. The ADM1034 supports send byte, write byte, and block byte SMBus write protocols. The following abbreviations are used in the diagrams: S—START P—STOP R—READ W—WRITE A—ACKNOWLEDGE A—NO ACKNOWLEDGE ...

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Block Read In this operation, the master reads a block of data from a slave device. The number of bytes to be read must be set in advance this, use a write byte operation to the #Bytes/Block Read ...

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Table 4. Temperature Data Format − (Local Temperature and Remote Temperature High Bytes) Temperature (5C) −64°C −40°C −32°C −2°C −1°C 0°C 1°C 2°C 10°C 20°C 50°C 75°C 100°C 125°C 150°C 191°C Table 5. Local and Remote Sensor Extended Resolution Extended ...

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Table 6. Temperature Measurement Registers Register Description 0x40 Local Temperature, LSBs 0x41 Local Temperature, MSBs 0x42 Remote 1 Temperature, LSBs 0x43 Remote 1 Temperature, MSBs 0x44 Remote 2 Temperature, LSBs 0x45 Remote 2 Temperature, MSBs High and low temperature limit ...

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Table 9. Offset Registers Registration Description 0x16 Local Offset 0x17 Remote 1 Offset 0x18 Remote 2 Offset Table 10. Offset Register Values Code Offset Value 0 0000 000 0°C (Default Value) 0 0000 001 0 0000 111 0 0001 111 ...

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Limits The following is a list of all the 8−bit limits on the ADM1034: Table 11. Temperature Limit Registers Register Description 0x0B Local High Limit 0x0C Local Low Limit 0x0D Local THERM Limit 0x0E Remote 1 High Limit 0x0F ...

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Table 14. Status Register 2 (Reg. 0x50) Bit # Name Description Local THERM temperature limit has been exceeded. 6 R1T 1 = Remote 1 THERM temperature limit has been exceeded. 5 R2T 1 = Remote 2 ...

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Take the appropriate action for a given interrupt source. 6. Exit the interrupt handler. 7. Periodically poll the status register. If the interrupt status bit clears, reset the corresponding interrupt mask bit to 0. The SMBusALERT output and status ...

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Conversion Rate Register The ADM1034 makes measurements per second. However, for the sake of reduced power consumption and better noise immunity, users may run the ADM1034 at a slower conversion rate. Better noise immunity results from the ...

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The user can also configure the THERM pin to be pulled low as an output whenever the Remote 1 temperature exceeds the Remote 1 THERM limit. Set the Enable Remote 1 THERM events bit (Bit 1) of Configuration Register 4 ...

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IDEAL TACH t POLE DRIVE ACTUAL TACH Figure 34. Drive Signal by Using Synchronous Control Fan Inputs Pin 2 and Pin 4 are TACH inputs intended for fan speed measurement. These inputs are open−drain. Signal conditioning on the ADM1034 accommodates ...

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R1* FAN(0–7) TACH R2 OUTPUT *SEE TEXT Figure 38. Fan with Strong TACH. Pullup to >V Totem−Pole Output, Attenuated with R1/R2 Fan Speed Measurement The fan counter does not count the fan TACH output pulses directly. This ...

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Fan Response Register The ADM1034 fan speed controller operates by reading the current fan speed, comparing it with the programmed fan speed, and then updating the drive signal applied to the fan. The rate at which the ADM1034 looks at ...

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Figure 40 and Figure 41 show what the look−up table looks like if all eight points are used on the one curve for both fans. Figure 40 shows the transfer curve when the fan is programmed to run at discrete ...

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Setting Which Temperature Channel Controls a Fan Fan Behavior Register (Address 0x07) Bits <1:0> = DRIVE1 Behavior (D1B) Bits <3:2> = DRIVE2 Behavior (D2B) The ADM1034 can be configured so that Fan 1 or Fan 2 can be controlled by ...

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XOR Tree Test Mode The ADM1034 includes an XOR tree test mode. This is useful for in circuit test equipment at board level testing. By applying stimulus to the pins included in the XOR test possible to detect ...

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Table 31. ADM1034 Registers Address R/W Description Bit 7 0x10/90 R/W Remote 1 THERM Limit 0x11/91 R/W Remote 2 High Limit 0x12/92 R/W Remote 2 Low Limit 0x13/93 R/W Remote 2 THERM Limit 0x16/96 R/W Local Offset 0x17/97 R/W Remote ...

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Table 31. ADM1034 Registers Address R/W Description Bit 7 0x34/B4 R/W Look−Up Table, FS6 0x35/B5 R/W Look−Up Table, FS6 0x36/B6 R/W Look−Up Table, FS7 0x37/B7 R/W Look−Up Table, FS7 0x38/B8 R/W Look−Up Table, FS8 0x39/B9 R/W Look−Up Table, FS8 0x3A/BA ...

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Table 32. Register 0x00, # Bytes/Block Read, POR = 0x20, Lock = Y, S/W Reset = Y Bit Name R/W <7:0> # Bytes Block Read R/W Table 33. Register 0x01, Configuration Register 1, Power−On Default 0x01, Lock = Y, S/W ...

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Table 36. Register 0x04, Configuration Register 4, Power−On Default 0x00, Lock = Y, S/W Reset = Y Bit Name 7 FAN_FAULT/REF <6:4> THERM % Time Window 3 XOR Test 2 Enable Remote 2 THERM Events 1 Enable Remote 1 THERM ...

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Table 39. Register 0x07, Fan Behavior Register, Power−On Default 0x09, Lock = Y, S/W Reset = Y Bit Name R/W 7 Fan 2 Off R/W 6 Fan 1 Off R/W 5 Res R 4 Res R <3:2> DRIVE2 BHVR R/W ...

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Table 42. Register 0x0A, Mask Register 3, Power−On Default 0x00, Lock = N, S/W Reset = Y Bit Name R/W 7 Fan 1 Stalled R/W 6 Fan Alarm Speed R/W 5 Fan 2 Stalled R/W 4 Reserved R 3 Reserved ...

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Table 50. Register 0x12, Remote 2 Low Limit, Power−On Default 0x54, Lock = N, S/W Reset = N Bit Name R/W <7:0> Remote 2 Low Limit R/W Table 51. Register 0x13, Remote 2 THERM Limit, Power−On Default 0x95, Lock = ...

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Table 57. Look−Up Table Registers, Lock = Y, S/W Reset = Y Register Address R/W 0x22 R/W 0x23 R/W 0x24 R/W 0x25 R/W 0x26 R/W 0x27 R/W 0x28 R/W 0x29 R/W 0x2A R/W 0x2B R/W 0x2C R/W 0x2D R/W 0x2E ...

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Table 59. Register 0x3C, Fan Response Register, Power−On Default 0x11, Lock = Y, S/W Reset = Y Bit Name R/W 7 Res R <6:4> Fan 2 Response R/W 3 Res R <2:0> Fan 1 Response R/W Table 60. Register 0x3D, ...

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Table 64. Register 0x42/43, Remote 1 Temp Registers, Power−On Default 0x00, Lock = N, S/W Reset = Y Bit Name <4:0> Remote 1 Temperature LSB <12:5> Remote 1 Temperature MSB Table 65. Register 0x44/45, Remote 2 Temp Registers, Power−On Default ...

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... Device Number Temperature Range ADM1034ARQZ −40°C to +125°C ADM1034ARQZ−REEL −40°C to +125°C †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 “Z’’ suffix indicates Pb−Free part. ...

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