ADM1030ARQZ ON Semiconductor, ADM1030ARQZ Datasheet
ADM1030ARQZ
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ADM1030ARQZ Summary of contents
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FEATURES Optimized for Pentium III: Allows Reduced Guardbanding ® Software and Automatic Fan Speed Control Automatic Fan Speed Control Allows Control Independent of CPU Intervention after Initial Setup Control Loop Minimizes Acoustic Noise and Battery Consumption Remote Temperature Measurement ...
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ADM1030–SPECIFICATIONS Parameter POWER SUPPLY Supply Voltage Supply Current TEMPERATURE-TO-DIGITAL CONVERTER Internal Sensor Accuracy Resolution External Diode Sensor Accuracy Resolution Remote Sensor Source Current OPEN-DRAIN DIGITAL OUTPUTS (THERM, INT, FAN_FAULT, PWM_OUT) Output Low Voltage High-Level ...
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... Although the ADM1030 features proprietary ESD protection circuitry, permanent damage may occur on devices subjected to high energy electrostatic discharges. Therefore, proper ESD precautions are recommended to avoid performance degradation or loss of functionality. REVISION HISTORY 02/08—Rev 1: Conversion to ON Semiconductor 04/03—Data Sheet Change from Rev Rev. A. REV. A Model ADM1030ARQ ) ...
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ADM1030 Pin No. Mnemonic Description 1 PWM_OUT Digital Output (Open-Drain). Pulsewidth modulated output to control fan speed. Requires pull-up resistor (10 kW typical). 2 TACH/AIN Digital/Analog Input. Fan tachometer input to measure fan speed. May be reprogrammed as an analog ...
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DXP TO GND 0 DXP TO V –5 –10 –15 –20 1 3.3 10 LEAKAGE RESISTANCE – M� TPC 1. Temperature Error vs. PCB Track Resistance 100mV p ...
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ADM1030 30mV p 20mV p-p IN –1 0 100k 1M 100M 200M FREQUENCY – Hz TPC 7. Temperature Error vs. Differential-Mode Noise Frequency 200 180 160 140 ...
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GENERAL DESCRIPTION The ADM1030 is a temperature monitor and PWM fan control- ler for microprocessor-based systems. The device communicates with the system via a serial System Management Bus. The serial bus controller has a hardwired address pin for device selection ...
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ADM1030 In the case of the ADM1030, write operations contain either one or two bytes, and read operations contain one byte, and perform the following functions. To write data to one of the device data registers or read data from ...
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ALERT RESPONSE ADDRESS Alert Response Address (ARA feature of SMBus devices that allows an interrupting device to identify itself to the host when multiple devices exist on the same bus. The INT output can be used as an ...
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ADM1030 Table III. Remote Sensor Extended Temperature Resolution Extended Remote Temperature Resolution (�C) Low Bits 0.000 000 0.125 001 0.250 010 0.375 011 0.500 100 0.625 101 0.750 110 0.875 111 The extended temperature resolution for the local and remote ...
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The behavior of the high limit and THERM limit is as follows: 1. Whenever the temperature measured exceeds the high tem- perature limit, the INT pin is asserted low the temperature exceeds the THERM limit, the ...
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ADM1030 AUTOMATIC FAN SPEED CONTROL The ADM1030 has a local temperature channel and a remote temperature channel, which may be connected to an on-chip diode-connected transistor on a CPU. These two temperature channels may be used as the basis for ...
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Table V. Fan Spin-Up Times Spin-Up Time Bits 2:0 (Fan Characteristics Register 1) 000 200 ms 001 400 ms 010 600 ms 011 800 ms 100 1 sec 101 2 secs (Default) 110 4 secs 111 8 secs Once the ...
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ADM1030 It should be noted however, that changing the minimum PWM duty cycle affects the control loop behavior. Slope 1 of Figure 10 shows T set and the T MIN chosen this case, ...
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RELEVANT REGISTERS FOR AUTOMATIC FAN SPEED CONTROL MODE Register 0x00 Configuration Register 1 <7> Logic 1 selects Automatic Fan Speed Control, Logic 0 selects software control (Default = 1). <6:5> Remote Temperature controls Fan 11 = Fastest Calculated ...
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ADM1030 FILTERED CONTROL MODE The Automatic Fan Speed Control Loop reacts instantaneously to changes in temperature, i.e., the PWM duty cycle will respond immediately to temperature change. In certain circumstances, we may not want the PWM output to react instantaneously ...
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R TEMP 100 80 60 PWM DUTY CYCLE TIME – s Figure 13. Filtered Mode with Ramp Rate = 8 Figure 14 shows how changing the ramp rate from affects the ...
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ADM1030 Effect of ADC Sample Rate on Filtered Mode The second means by which to change the Filtered Mode char- acteristics is to adjust the ADC sample rate. The faster the ADC sample rate, the more temperature samples are obtained ...
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RPM FEEDBACK MODE The second method of fan speed control under software is RPM Feedback Mode. This involves programming the desired fan RPM value to the device to set fan speed. The advantages include a very tightly maintained fan RPM ...
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ADM1030 1. Run the fan at 53% PWM duty cycle in Software Mode. Clear Bits 5 and 7 of Configuration Register 1 (Reg 0x00) to enter PWM duty cycle mode. Write 0x08 to the Fan Speed Config Register (Reg 0x22) ...
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Tek PreVu CH1 100mV CH1 CH2 5.00mV M 4.00ms A CH1 CH3 50.0mV CH4 50.0mV Figure 20. Fan Speed Sensing Waveform at TACH/AIN Pin FAN SPEED MEASUREMENT The fan counter does not count the fan tach ...
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ADM1030 The INT pin will continue to generate interrupts after the asser- tion of FAN_FAULT since tach measurement continues even after fan failure. Should the fan recover from its failure condi- tion, the FAN_FAULT signal will be negated, and the ...
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Register Name Value Registers Device ID Register Company ID THERM Behavior/Revision Configuration Register 1 Configuration Register 2 Status Register 1 Status Register 2 Manufacturer’s Test Register Fan Characteristics Register 1 Fan Speed Configuration Register Fan Filter Register Local Temperature T ...
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ADM1030 Table XIV. Register 0x00 Configuration Register 1 Power-On Default 90h Bit Name R/W 0 MONITOR Read/Write 1 INT Enable Read/Write 2 TACH/AIN Read/Write 3 PWM Invert Read/Write 4 Fan Fault Enable Read/Write 6–5 PWM Mode Read/Write 7 Auto/SW Ctrl ...
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Table XVI. Register 0x02 Status Register 1 Power-On Default = 00H Bit Name R/W 0 Alarm Speed Read Only 1 Fan Fault Read Only 2 Remote Temp High Read Only 3 Remote Temp Low Read Only 4 Remote Temp Therm ...
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ADM1030 Table XIX. Register 0x20 Fan Characteristics Register 1 Power-On Default = 5DH Bit Name R/W <2:0> Fan 1 Spin-up Read/Write <5:3> PWM 1 Frequency Read/Write <7:6> Speed Range Read/Write Table XX. Register 0x22 Fan Speed Config Register Power-On Default ...
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Table XXII. Register 0x24 Local Temp T Bit Name <7:3> Local Temp T MIN <2:0> Local Temp T RANGE Table XXIII. Register 0x25 Remote Temp T Bit Name <7:3> Remote Temp T MIN <2:0> Remote Temp T RANGE REV. A ...
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ADM1030 Table XXIV. Register 0x3F Therm Behavior/Revision Power-On Default = 80H Bit Name R/W <7> Therm-to-Fan Enable Read/Write <6:4> Unused Read Only <3:0> Revision Read Only Table XXV. Register 0x0D Local Temp Offset Power-On Default = 00H Bit Name R/W ...
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... Remote Temp T MIN ADM1030ARQ-REEL ADM1030ARQ-REEL7 ADM1030ARQZ ADM1030ARQZ-REEL ADM1030ARQZ-RL7 Pb-Free part <2:0> Remote Temp T RANGE ON Semiconductor and the ON logo are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC reserves the right to make changes without further notice to any products herein. SCILLC makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does SCILLC assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages. “ ...