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PDF ADM1034 Fiche technique - Analog Devices

Numéro de référence ADM1034
Description Thermal Monitor and Fan Speed (RPM) Controller
Fabricant Analog Devices 
Logo Analog Devices Logo 

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ADM1034 Datasheet, Description
Thermal Monitor and
Fan Speed (RPM) Controller
ADM1034
FEATURES
1 local and 2 remote temperature channels
±1°C accuracy on local and remote channels
Automatic remote temperature channels, up to 1 kΩ
Fast (up to 64 measurements per second)
SMBus 2.0, 1.1, and 1.0 compliant
SMBus address input/LOCATION input to UDID
Programmable over-/undertemperature limits
Programmable fault queue
SMBusALERT output
Fail-safe overtemperature comparator output
Fan speed (RPM) controller
Look-up table for temperature-to-fan-speed control
Linear and discrete options for look-up table
FAN_FAULToutput
THERM input, used to time PROCHOT assertions
REF input, used as reference for THERM (PROCHOT)
3 V to 5.5 V supply
Small 16-lead QSOP package
APPLICATIONS
Desktop and notebook PCs
Embedded systems
Telecommunications equipment
LCD projectors
FUNCTIONAL BLOCK DIAGRAM
VCC
6
ADM1034
DRIVE1 1
DRIVE2 3
MANUAL FAN
SPEED CONTROL
REGISTERS
TEMPERATURE-TO-
FAN-SPEED
LOOK-UP TABLE
FAN SPEED
CONTROLLER
FAN RESPONSE
SMBUS
ADDRESS
SERIAL BUS
INTERFACE
ADDRESS
POINTER
REGISTER
STATUS
REGISTER
ALERT
THERM
MASK
REGISTERS
LIMIT
COMPARATOR
FAULT
QUEUE
16 SCL
15 SDA
8 FAN_FAULT
14 ALERT
7 THERM
TACH1 2
TACH2 4
TACH SIGNAL
CONDITIONING
REF 8
LOCATION 13
D1– 9
D1+ 10
D2– 11
D2+ 12
SRC
BLOCK
BAND GAP
TEMPERATURE
SENSOR
ANALOG
MULTIPLEXER
FAN
SPEED
COUNTER
ADC
VALUE AND
LIMIT
REGISTERS
FAULT
QUEUE
HYSTERESIS
REGISTERS
OFFSET
REGISTERS
BAND GAP
REFERENCE
CONVERSION
RATE REGISTER
CONFIGURATION
REGISTERS
5
GND
Figure 1.
THERM PERCENT
TIMER
Rev. 0
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.
Specifications subject to change without notice. No license is granted by implication
or otherwise under any patent or patent rights of Analog Devices. Trademarks and
registered trademarks are the property of their respective owners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
www.analog.com
Fax: 781.326.8703 © 2004 Analog Devices, Inc. All rights reserved.
ADM1034 Fiche technique
GENERAL DESCRIPTION
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 on a microprocessor die.
The device also monitors its own ambient temperature.
The ADM1034 can monitor and control the speed of two
cooling fans. The user can program a target fan speed, or else
use the look-up table to input a temperature-to-fan-speed
profile. The look-up table can be configured to run the fans at
ADM1034
discrete speeds (discrete mode) or to ramp the fan speed with
temperature (linear mode).
The ADM1034 communicates over a 2-wire SMBus 2.0
interface. An 8-level LOCATION input allows the user to
choose between SMBus 1.1 and SMBus 2.0. An ALERT output
indicates error conditions. The THERM I/O signals over-
temperature as an output and times THERM assertions as
an input. Pin 8 can be configured as a reference for the
THERM (PROCHOT) input.
Rev. 0 | Page 3 of 40

3 Page

ADM1034 pdf
ADM1034
ABSOLUTE MAXIMUM RATINGS
Table 2.
Parameter
Rating
Positive Supply Voltage (VCC)
0.3 V to +6.5 V
Voltage on Any Input or Output Pin except
FAN_FAULT and LOCATION
0.3 V to +6.5 V
Voltage on FAN_FAULT1
VCC
Voltage on LOCATION
Input Current at Any Pin
VCC + 0.3 V
±20 mA
Maximum Junction Temperature (TJ max)
Storage Temperature Range
150°C
65°C to +150°C
Lead Temperature, Soldering (10 s)
IR Reflow Peak Temperature
ESD Rating—All Pins
300°C
220°C
1500 V
1 During power-up the voltage on FAN_FAULT should not be higher than VCC.
Stresses above those listed under Absolute Maximum Ratings
may cause permanent damage to the device. This is a stress
rating only; functional operation of the device at these or any
other conditions above those indicated in the operational
section of this specification is not implied. Exposure to Absolute
Maximum Rating conditions for extended periods may affect
device reliability.
THERMAL CHARACTERISTICS
16-Lead QSOP Package:
θJA = 150°C/W, θJC = 39°C/W
ESD CAUTION
ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily accumulate on
the human body and test equipment and can discharge without detection. Although this product 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.
Rev. 0 | Page 6 of 40

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