ADM1021A

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2

Figure 1. Functional Block Diagram

STATUS REGISTER

LOCAL TEMPERATURE

HIGH LIMIT COMPARATOR

LOCAL TEMPERATURE

LOW LIMIT REGISTER

ANALOG MUX

BUSY

LOCAL TEMPERATURE

VALUE REGISTER

RUN/STANDBY

LOCAL TEMPERATURE

LOW LIMIT COMPARATOR

REMOTE TEMPERATURE

LOW LIMIT COMPARATOR

ADDRESS POINTER

REGISTER

ONE-SHOT

REGISTER

CONVERSION RATE

REGISTER

LOCAL TEMPERATURE

HIGH LIMIT REGISTER

CONFIGURATION

REGISTER

INTERRUPT

MASKING

EXTERNAL DIODE OPEN−CIRCUIT

SMBUS INTERFACE

ADM1021A

NC

NC

NC

NC

NC

D+

D-

ALERT

STBY

SDATA

SCLK

ADD0

ADD1

GND

GND

NC = NO CONNECT

A−TO−D

CONVERTER

ON−CHIP

TEMPERATURE

SENSOR

REMOTE TEMPERATURE

VALUE REGISTER

REMOTE TEMPERATURE

HIGH LIMIT COMPARATOR

3

4

1

2

5

7

8

9

13

16

12

14

10

6

15

11

REMOTE TEMPERATURE

LOW LIMIT REGISTER

REMOTE TEMPERATURE

HIGH LIMIT REGISTER

ABSOLUTE MAXIMUM RATINGS

Parameter

Rating

Unit

−0.3 to +6.0

V

D+, ADD0, ADD1

V

D− to GND

−0.3 to +0.6

SCLK, SDATA, ALERT, STBY

−0.3 to +6.0

V

Input Current

±50

mA

Input Current, D−

±1

mA

ESD Rating, All Pins (Human Body Model)

2000

V

Continuous Power Dissipation

Up to 70

°C

Derating Above 70

°C

650

6.7

mW

mW/

°C

Operating Temperature Range

−55 to +125

°C

150

°C

Storage Temperature Range

−65 to +150

°C

Lead Temperature, Soldering (10 sec)

300

°C

IR Reflow Peak Temperature

220

°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.

THERMAL CHARACTERISTICS

Parameter

Rating

16−Lead QSOP Package