ADT7483A(2012) Ver la hoja de datos (PDF) - ON Semiconductor
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ADT7483A Datasheet PDF : 20 Pages
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ADT7483A
ON-CHIP
TEMPERATURE
SENSOR
D1+ 3
D1− 4
D2+ 12
D2− 11
ANALOG
MUX
CONVERSION RATE
REGISTER
LOCAL TEMPERATURE
VALUE REGISTER
11-BIT A-TO-D
CONVERTER
BUSY
RUN/STANDBY
REMOTE 1 & 2 TEMP
VALUE REGISTERS
REMOTE 1 & 2 TEMP
OFFSET REGISTERS
EXTERNAL DIODE OPEN-CIRCUIT
STATUS REGISTERS
ADT7483A
SMBUS INTERFACE
2
6
VDD
GND
16
ADD0
1
ADD1
14
SDATA
15
SCLK
Figure 1. Functional Block Diagram
ADDRESS POINTER
REGISTER
ONE-SHOT
REGISTER
LOCAL TEMPERATURE
THERM LIMIT REGISTER
LOCAL TEMPERATURE
LOW LIMIT REGISTER
LOCAL TEMPERATURE
HIGH LIMIT REGISTER
REMOTE 1 & 2 TEMP.
THERM LIMIT REG.
REMOTE 1 & 2 TEMP.
LOW LIMIT REGISTERS
REMOTE 1 & 2 TEMP.
HIGH LIMIT REGISTERS
CONFIGURATION
REGISTER
INTERRUPT
MASKING
5
THERM
13
ALERT/THERM2
Table 1. PIN ASSIGNMENT
Pin No.
1
Mnemonic
ADD1
Description
Address 1 Pin. Tri-state input to set the SMBus address.
2
VDDB
Positive Supply, 3 V to 3.6 V.
3
D1+
Positive Connection. Connects to the first remote temperature sensor.
4
D1−
Negative Connection. Connects to the first remote temperature sensor.
5
THERM
Open-drain Output. Turns a fan on/off, or throttles a CPU clock in the event of an overtemperature
condition.
6
GND
Supply Ground Connection.
7
NC
No Connect.
8
NC
No Connect.
9
NC
No Connect.
10
NC
No Connect.
11
D2−
Negative Connection. Connects to the second remote temperature sensor.
12
D2+
Positive Connection. Connects to the second remote temperature sensor.
13
ALERT/THERM2 Open-drain Logic Output. Used as interrupt or SMBus alert. This may also be configured as a second
THERM output. Requires a pull-up resistor.
14
SDATA
Logic Input/Output, SMBus Serial Data. Open-drain output. Requires a pull-up resistor.
15
SCLK
Logic Input, SMBus Serial Clock. Requires a pull-up resistor.
16
ADD0
Address 0 Pin. Tri-state input to set the SMBus address.
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