ADM1030ARQ-REEL

Manufacturer Part NumberADM1030ARQ-REEL
DescriptionIC SNSR TEMP/FAN PWM CTRL 16QSOP
ManufacturerON Semiconductor
ADM1030ARQ-REEL datasheet
 


Specifications of ADM1030ARQ-REEL

Rohs StatusRoHS non-compliantFunctionFan Control, Temp Monitor
TopologyADC, Comparator, Multiplexer, Register BankSensor TypeExternal & Internal
Sensing Temperature0°C ~ 100°C, External SensorOutput TypeSMBus™
Output AlarmYesOutput FanYes
Voltage - Supply3 V ~ 5.5 VOperating Temperature0°C ~ 100°C
Mounting TypeSurface MountPackage / Case16-QSOP
1
Page 1
2
Page 2
3
Page 3
4
Page 4
5
Page 5
6
Page 6
7
Page 7
8
Page 8
9
Page 9
10
Page 10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
Page 1/29

Download datasheet (557Kb)Embed
Next
a
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 Accurate to 1�C
Using Remote Diode
0.125�C Resolution on Remote Temperature Channel
Local Temperature Sensor with 0.25�C Resolution
Pulsewidth Modulation Fan Control (PWM)
Programmable PWM Frequency
Programmable PWM Duty Cycle
Tach Fan Speed Measurement
Analog Input To Measure Fan Speed of 2-Wire Fans
(Using Sense Resistor)
2-Wire System Management Bus (SMBus) with ARA
Support
Overtemperature THERM Output Pin
Programmable INT Output Pin
Configurable Offset for All Temperature Channels
3 V to 5.5 V Supply Range
Shutdown Mode to Minimize Power Consumption
APPLICATIONS
Notebook PCs, Network Servers and Personal Computers
Telecommunications Equipment
ADM1030
NC
NC
PWM_OUT
CONTROLLER
TACH SIGNAL
TACH/AIN
CONDITIONING
D+
D–
BANDGAP
TEMPERATURE
SENSOR
*Patents pending.
REV. A
Information furnished by Analog Devices is believed to be accurate and
reliable. However, no responsibility is assumed by Analog Devices for its
use, nor for any infringements of patents or other rights of third parties that
may result from its use. No license is granted by implication or otherwise
©2008 SCILLC. All rights reserved.
under any patent or patent rights of Analog Devices. Trademarks and
February 2008 - Rev. 2
registered trademarks are the property of their respective companies.
Monitor and PWM Fan Controller
PRODUCT DESCRIPTION
The ADM1030 is an ACPI-compliant two-channel digital ther-
mometer and under/over temperature alarm, for use in computers
and thermal management systems. Optimized for the Pentium
III, the higher 1 C accuracy offered allows systems designers to
safely reduce temperature guardbanding and increase system
performance. A Pulsewidth Modulated (PWM) Fan Control out-
put controls the speed of a cooling fan by varying output duty
cycle. Duty cycle values between 33%–100% allow smooth
control of the fan. The speed of the fan can be monitored via a
TACH input for a fan with a tach output. The TACH input can
be programmed as an analog input, allowing the speed of a 2-wire
fan to be determined via a sense resistor. The device will also
detect a stalled fan. A dedicated Fan Speed Control Loop pro-
vides control even without the intervention of CPU software. It
also ensures that if the CPU or system locks up, the fan can still
be controlled based on temperature measurements, and the fan
speed adjusted to correct any changes in system temperature.
Fan Speed may also be controlled using existing ACPI software.
One input (two pins) is dedicated to a remote temperature-
sensing diode with an accuracy of ± 1 C, and a local temperature
sensor allows ambient temperature to be monitored. The device
has a programmable INT output to indicate error conditions.
There is a dedicated FAN_FAULT output to signal fan failure.
The THERM pin is a fail-safe output for over-temperature
conditions that can be used to throttle a CPU clock.
FUNCTIONAL BLOCK DIAGRAM
V
CC
SLAVE
ADDRESS
REGISTER
FAN
CHARACTERISTICS
REGISTER
FAN SPEED
PWM
CONFIG
REGISTER
T
/T
MIN
RANGE
REGISTER
FAN
SPEED
COUNTER
ANALOG
ADC
MULTIPLEXER
2.5V
BANDGAP
REFERENCE
GND
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700
Fax: 781/326-8703
Intelligent Temperature
ADM1030*
ADD
SERIAL BUS
SDA
INTERFACE
SCL
ADDRESS
NC
POINTER
REGISTER
INT
INTERRUPT
THERM
STATUS
REGISTER
FAN_FAULT
LIMIT
COMPARATOR
VALUE AND LIMIT
REGISTERS
NC
OFFSET
REGISTERS
CONFIGURATION
REGISTER
NC = NO CONNECT
Publication Order Number:
www.analog.com
© 2003 Analog Devices, Inc. All rights reserved.
ADM1030/D

ADM1030ARQ-REEL Summary of contents

  • Page 1

    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 ...

  • Page 2

    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 ...

  • Page 3

    ... 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 ) . . . . . . . . . . 150 C JMAX ...

  • Page 4

    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 ...

  • Page 5

    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 ...

  • Page 6

    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 ...

  • Page 7

    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 ...

  • Page 8

    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 ...

  • Page 9

    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 ...

  • Page 10

    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 ...

  • Page 11

    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 ...

  • Page 12

    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 ...

  • Page 13

    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 ...

  • Page 14

    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, ...

  • Page 15

    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 ...

  • Page 16

    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 ...

  • Page 17

    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 ...

  • Page 18

    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 ...

  • Page 19

    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 ...

  • Page 20

    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) ...

  • Page 21

    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 ...

  • Page 22

    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 ...

  • Page 23

    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 ...

  • Page 24

    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 ...

  • Page 25

    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 ...

  • Page 26

    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 ...

  • Page 27

    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 ...

  • Page 28

    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 ...

  • Page 29

    ... Model Bit Name Updated OUTLINE DIMENSIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 ADM1030ARQ <7:3> 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. “ ...