ADT7481(2014) 查看數據表（PDF） - ON Semiconductor

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ADT7481
(Rev.:2014)

Dual Channel Temperature Sensor and Overtemperature Alarm

ON Semiconductor 

ADT7481

ON-CHIP

TEMPERATURE

SENSOR

D1+ 2

D1− 3

D2+ 7

D2− 6

ANALOG

MUX

CONVERSION RATE

REGISTER

LOCAL TEMPERATURE

VALUE REGISTER

11-BIT A-TO-D

CONVERTER

BUSY RUN/STANDBY

REMOTE 1 AND 2 TEMP

VALUE REGISTER

REMOTE 1 AND 2 TEMP

OFFSET REGISTER

EXTERNAL DIODE OPEN-CIRCUIT

STATUS REGISTERS

ADT7481

SMBUS INTERFACE

1

5

VDD

GND

9

SDATA

10

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

4

THERM

8

ALERT/THERM2

Table 1. ABSOLUTE MAXIMUM RATINGS

Parameter

Rating

Unit

Positive Supply Voltage (VDD) to GND

D+

D− to GND

−0.3 to +3.6

V

−0.3 to VDD + 0.3

V

−0.3 to +0.6

V

SCLK, SDATA, ALERT, THERM

−0.3 to +3.6

V

Input Current, SDATA, THERM

Input Current, D−

−1 to +50

mA

±1

mA

ESD Rating, All Pins (Human Body Model)

1,500

V

Maximum Junction Temperature (TJ MAX)

Storage Temperature Range

150

°C

−65 to +150

°C

IR Reflow Peak Temperature

220

°C

IR Reflow Peak Temperature for Pb-Free

260

°C

Lead Temperature, Soldering (10 sec)

300

°C

Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the

Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect

device reliability.

NOTE: This device is ESD sensitive. Use standard ESD precautions when handling.

Table 2. THERMAL CHARACTERISTICS

Package Type

10-lead MSOP

qJA

qJC

Unit

142

43.74

°C/W

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