ADM1021

–3–

REV. 0

ABSOLUTE MAXIMUM RATINGS*

D– to GND . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3 V to +0.6 V

SCLK, SDATA,

ALERT, STBY . . . . . . . . . . . . –0.3 V to +6 V

Input Current, SDATA . . . . . . . . . . . . . . . . –1 mA to +50 mA

Input Current, D– . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

±1 mA

ESD Rating, all pins (Human Body Model) . . . . . . . . 2000 V

Continuous Power Dissipation

Up to +70

°C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 650 mW

Derating above +70

°C . . . . . . . . . . . . . . . . . . . . 6.7 mW/°C

Operating Temperature Range . . . . . . . . . . –55

°C to +125°C

°C

Storage Temperature Range . . . . . . . . . . . . –65

°C to +150°C

Lead Temperature, Soldering

Vapor Phase 60 sec . . . . . . . . . . . . . . . . . . . . . . . . . +215

°C

Infrared 15 sec . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +200

°C

*Stresses above those listed under Absolute Maximum Ratings may cause perma-

nent damage to the device. This is a stress rating only; functional operation of the

device at these or any other conditions above those indicated in the operational

section of this specification is not implied. Exposure to absolute maximum rating

conditions for extended periods may affect device reliability.

THERMAL CHARACTERISTICS

16-Lead QSOP Package:

θ

°C/Watt.

ORDERING GUIDE

Temperature

Package

Package

Model

Range

Description

Option

ADM1021ARQ

0

°C to +85°C

16-Lead QSOP RQ-16

PIN FUNCTION DESCRIPTIONS

Pin No.

Mnemonic

Description

1, 16

TEST

Test pin for factory use only. See

note.

Positive supply, +3 V to +5.5 V.

3

D+

Positive connection to remote tem-

perature sensor.

4

D–

Negative connection to remote tem-

perature sensor.

5, 9, 13

NC

No Connect.

6

ADD1

Three-state logic input, higher bit of

device address.

7, 8

GND

Supply 0 V connection.

10

ADD0

Three-state logic input, lower bit of

device address.

11

ALERT

Open-drain logic output used as

interrupt or SMBus alert.

12

SDATA

Logic input/output, SMBus serial

data. Open-drain output.

14

SCLK

Logic input, SMBus serial clock.

15

STBY

Logic input selecting normal opera-

tion (high) or standby mode (low).

NOTE

Pins 1 and 16 are reserved for test purposes. Ideally these pins should be left

unconnected. If routing through these pins is required, then both should be at

the same potential (i.e., connected together).

PIN CONFIGURATION

TOP VIEW

(Not to Scale)

16

15

14

13

12

11

10

9

1

2

3

4

5

6

7

8

NC = NO CONNECT

TEST

D+

D–

NC

ADD1

GND

GND

TEST

STBY

SCLK

NC

SDATA

ALERT

ADD0

NC

ADM1021

PROTOCOL

START

CONDITION

(S)

BIT 7

MSB

(A7)

BIT 6

(A6)

SCL

SDA

PROTOCOL

SCL

SDA

BIT 0

LSB

(R/

W)

ACKNOWLEDGE

(A)

STOP

CONDITION

(P)

Figure 1. Diagram for Serial Bus Timing