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ADT7462ACPZ-500RL7 Arkusz danych(PDF) 1 Page - Analog Devices

Numer części ADT7462ACPZ-500RL7
Szczegółowy opis  Flexible Temperature and Voltage Monitor and System Fan Controller
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ADT7462ACPZ-500RL7 Arkusz danych(HTML) 1 Page - Analog Devices

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Flexible Temperature and Voltage Monitor
and System Fan Controller
ADT7462
Rev. 0
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibilityis assumedbyAnalogDevicesforitsuse,norforanyinfringements of patents or other
rightsofthirdpartiesthatmayresultfromitsuse.Specificationssubjecttochangewithoutnotice.No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
www.analog.com
Fax: 781.461.3113
©2006 Analog Devices, Inc. All rights reserved.
FEATURES
One local and up to three remote temperature channels
Series resistance cancellation on remote channels
Thermal protection using THERM pins
Up to four PWM fan drive outputs
Supports both high and low frequency PWM drives
Up to eight TACH inputs
Measures the speed of 3-wire and 4-wire fans
Automatic fan speed control loop
Includes dynamic TMIN control
Monitors up to 13 voltage inputs
Monitors up to 7 VID inputs
Includes VID-on-fly support
Bidirectional reset
Chassis intrusion detect
SMBus 1.1- and SMBus 1.0-compatible
3.3 V and 5 V operation
Extended operating range from −40°C to +125°C
Space-saving 32-lead chip scale package
APPLICATIONS
Servers and personal computers
Telecommunications equipment
Test equipment and measurement instruments
GENERAL DESCRIPTION
The ADT7462 is a flexible systems monitor IC, suitable for use
in a wide variety of applications. It can monitor temperature in
up to three remote locations, as well as its ambient temperature.
There are up to four PWM outputs. These can be used to control
the speed of a cooling fan by varying the % duty cycle of the
PWM drive signal applied to the fan. The ADT7462 supports
high frequency PWM for 4-wire fans and low frequency PWM
for 2-wire and 3-wire fans. There are up to eight TACH inputs,
which can be used to measure the speed of 3-wire and 4-wire
fans. There are up to 13 voltage monitoring inputs, ranging
from 12 V to 0.9 V.
The ADT7462 is fully compatible with SMBus 1.1 and SMBus 1.0.
The ADT7462 also includes a THERM I/O and a RESET I/O.
The ADT7462 is available in a 32-lead LFCSP_VQ. Many of the
pins are multifunctional. There are five easy configuration options,
which are set up using the easy configuration register. Users pick
the configuration closest to their requirements; individual pins
can be reconfigured after the easy configuration option has
been chosen.
FUNCTIONAL BLOCK DIAGRAM
SMBus
ADDRESS
SELECTION
SERIAL BUS
INTERFACE
VID
REGISTER
PWM REGISTERS
ADDRESS POINTER
REGISTER
PWM
CONFIGURATION
REGISTERS
INTERRUPT
MASKING
RESET
CIRCUIT
GPIO STATUS AND
CONFIGURATION
REGISTERS
SCSI STATUS
PERFORMANCE
MONITORING
THERMAL
PROTECTION
INPUT SIGNAL
CONDITIONING
AND ANALOG
MULTIPLEXER
BAND GAP
TEMPERATURE
SENSOR
VID0 TO VID6
PWM1 TO PWM4
TACH1 TO TACH8
VR_HOT2
SCSI_TERM1 AND
SCSI_TERM2
VR_HOT1
THERM2
THERMAL DIODE INPUTS
VOLTAGE INPUTS
ADT7462
VALUE AND LIMIT
REGISTERS
LIMIT
COMPARATORS
INTERRUPT
STATUS
REGISTERS
AUTOMATIC
FAN SPEED
CONTROL
ACOUSTIC
ENHANCEMENT
CONTROL
DYNAMIC TMIN
CONTROL
13-BIT
ADC
BAND GAP
REFERENCE
GPIO1 TO GPIO8
RESET
CI
GND
SMBus
ADDRESS
SCL SDA
ALERT
FAN SPEED
COUNTER
FAN2MAX
THERM1
Figure 1.


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