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| 型號： | ADT7462ACPZ-500RL7 |
| 廠商： | ON SEMICONDUCTOR |
| 元件分類： | 溫度/濕度傳感器 |
| 英文描述： | DIGITAL TEMP SENSOR-SERIAL, 8BIT(s), 4Cel, SQUARE, SURFACE MOUNT |
| 封裝： | 5 X 5 MM, LFCSP-32 |
| 文件頁數(shù)： | 1/88頁 |
| 文件大?。?/td> | 836K |
| 代理商： | ADT7462ACPZ-500RL7 |
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Flexible Temperature and Voltage Monitor
and System Fan Controller
ADT7462
2007 SCILLC. All rights reserved.
Publication Order Number:
December 2007 – Rev. 2
ADT7462/D
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. Up to eight TACH inputs 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. Five easy configuration options can be
set up using the easy configuration register. Users choose 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
ADD
SCL SDA
ALERT
FAN SPEED
COUNTER
055
69
-001
FAN2MAX
THERM1
Figure 1.
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