EVAL-ADM1023EB datasheet, PDF - EEWORLD Datasheet

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EVAL-ADM1023EB: Descriptionboard eval for adm1023; CategoryDevelopment board/suite/development tools; File Size241KB，18 Pages; ManufacturerON Semiconductor; Websitehttp://www.onsemi.cn

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board eval for adm1023

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ACPI-Compliant, High Accuracy

Microprocessor System Temperature Monitor

ADM1023

FEATURES

Next generation upgrade of ADM1021

On-chip and remote temperature sensing

Offset registers for system calibration

1°C accuracy and resolution on local channel

0.125°C resolution/1°C accuracy on remote channel

Programmable over/under temperature limits

Programmable conversion rate

Supports system management bus (SMBus) ALERT

2-wire SMBus serial interface

200 μA max operating current (0.25 conversions/second)

1 μA standby current

3 V to 5.5 V supply

Small 16-lead QSOP package

GENERAL DESCRIPTION

The ADM1023

is a 2-channel digital thermometer and under-

and overtemperature alarm for use in personal computers and

other systems requiring thermal monitoring and management.

Optimized for the Pentium® III, the higher accuracy allows

systems designers to safely reduce temperature guard banding

and increase system performance. The device can measure the

temperature of a microprocessor using a diode-connected PNP

transistor, which may be provided on-chip with the Pentium III

or similar processors; or it can be a low-cost, discrete NPN/PNP

device such as the 2N3904/2N3906. A novel measurement

technique cancels out the absolute value of the transistor’s base

emitter voltage so that no calibration is required. The second

measurement channel measures the output of an on-chip

temperature sensor to monitor the temperature of the device

and its environment.

The ADM1023 communicates over a 2-wire serial interface

compatible with SMBus standards. Under- and overtemperature

limits can be programmed into the device over the serial bus,

and an ALERT output signals when the on-chip or remote

temperature is out of range. This output can be used as an

interrupt or as an SMBus ALERT.

APPLICATIONS

Desktop computers

Notebook computers

Smart batteries

Industrial controllers

Telecomm equipment

Instrumentation

FUNCTIONAL BLOCK DIAGRAM

ADDRESS POINTER

ONE-SHOT

CONVERSION RATE

ON-CHIP

TEMPERATURE

SENSOR

OFFSET

REGISTERS

LOCAL TEMPERATURE

VALUE REGISTER

LOCAL TEMPERATURE

LOW-LIMIT COMPARATOR

LOCAL TEMPERATURE

HIGH-LIMIT COMPARATOR

REMOTE TEMPERATURE

LOW-LIMIT COMPARATOR

REMOTE TEMPERATURE

HIGH-LIMIT COMPARATOR

LOCAL TEMPERATURE

LOW-LIMIT REGISTER

LOCAL TEMPERATURE

HIGH-LIMIT REGISTER

REMOTE TEMPERATURE

LOW-LIMIT REGISTERS

REMOTE TEMPERATURE

HIGH-LIMIT REGISTERS

CONFIGURATION

STATUS REGISTER

SMBus INTERFACE

STBY

ALERT

D+

D–

ANALOG

MUX

A-TO-D

CONVERTER

BUSY

RUN/STANDBY

REMOTE TEMPERATURE

VALUE REGISTERS

EXTERNAL DIODE OPEN-CIRCUIT

ADM1023

INTERRUPT

MASKING

GND

SDATA

SCLK

ADD0

ADD1

00058-001

NC = NO CONNECT

Figure 1.

Protected by U.S. Patents 5,195,827; 5,867,012; 5,982,221; 6,097,239; 6,133,753; 6,169,442; other patents pending.

January 2008 – Rev. 8

Publication Order Number:

ADM1023/D

ADM1023

TABLE OF CONTENTS

Specifications .....................................................................................3

Absolute Maximum Ratings ............................................................4

Thermal Characteristics...............................................................4

ESD Caution ..................................................................................4

Pin Configuration and Function Description...............................5

Typical Performance Characteristics..............................................6

Theory of Operation.........................................................................8

Functional Description ................................................................8

Measurement Method ..................................................................9

Sources of Errors on Thermal Transistors Measurement

Method ...........................................................................................9

Temperature Data Format..........................................................10

Serial Bus Interface .....................................................................12

Address Pins ................................................................................12

ALERT Output ............................................................................14

Low Power Standby Modes .......................................................15

Sensor Fault Detection ...............................................................15

Applications .....................................................................................16

Factors Affecting Accuracy .......................................................16

Layout Considerations ...............................................................16

Application Circuits....................................................................17

Outline Dimensions........................................................................18

Ordering Guide ...........................................................................18

REVISION HISTORY

01/08 - Rev 8: Conversion to ON Semiconductor

7/05—Rev. G to Rev. H

Changes to Table 1 ............................................................................ 3

2/05—Rev. F to Rev. G

Updated Format ..................................................................Universal

Changes to Specifications................................................................. 3

Changes to Absolute Maximum Ratings........................................ 4

Changes to Figure 14 ........................................................................ 8

Changes to Figure 21 ...................................................................... 17

Changes to Ordering Guide........................................................... 18

4/03—Rev. E to Rev. F

Added Reference to Figure 1 ........................................................... 2

4/03—Rev. D to Rev. E

Added ESD Caution ......................................................................... 3

Updated Outline Dimensions ....................................................... 13

9/02—Rev. C to Rev. D

Outline Dimensions updated .......................................................... 13

5/02—Rev. B to Rev. C

Figures 2 to 11 changed to TPCs 1–10, renumbered figures

accordingly......................................................................................... 4

Text change to Figure 9 (TPC 8) ..................................................... 5

Callouts in text added for Tables IV–VI ........................................ 8

Change to Serial Bus Interface section........................................... 9

4/00—Revision 0: Initial Version

Rev. 8 | Page 2 of 18 | www.onsemi.com

EVAL-ADM1023EB Related Products

	EVAL-ADM1023EB	ADM1023ARQ	ADM1023ARQ-REEL	ADM1023ARQZ-REEL7	ADM1023ARQ-REEL7
Description	board eval for adm1023	IC sensor temp prec dual 16qsop	IC sensor temp prec dual 16qsop	IC sensor temp dual prec 16qsop	IC sensor temp prec dual 16qsop
Is it Rohs certified?	-	incompatible	incompatible	-	incompatible
Parts packaging code	-	SSOP	SSOP	-	SSOP
package instruction	-	MO-137AB, QSOP-16	MO-137AB, QSOP-16	-	MO-137AB, QSOP-16
Contacts	-	16	16	-	16
Reach Compliance Code	-	not_compliant	not_compliant	-	not_compliant
Analog Integrated Circuits - Other Types	-	ANALOG CIRCUIT	ANALOG CIRCUIT	-	ANALOG CIRCUIT
JESD-30 code	-	R-PDSO-G16	R-PDSO-G16	-	R-PDSO-G16
length	-	4.9022 mm	4.9022 mm	-	4.9022 mm
Humidity sensitivity level	-	1	1	-	1
Number of functions	-	1	1	-	1
Number of terminals	-	16	16	-	16
Maximum operating temperature	-	120 °C	120 °C	-	120 °C
Package body material	-	PLASTIC/EPOXY	PLASTIC/EPOXY	-	PLASTIC/EPOXY
encapsulated code	-	SSOP	SSOP	-	SSOP
Package shape	-	RECTANGULAR	RECTANGULAR	-	RECTANGULAR
Package form	-	SMALL OUTLINE, SHRINK PITCH	SMALL OUTLINE, SHRINK PITCH	-	SMALL OUTLINE, SHRINK PITCH
Peak Reflow Temperature (Celsius)	-	225	240	-	225
Certification status	-	Not Qualified	Not Qualified	-	Not Qualified
Maximum seat height	-	1.7526 mm	1.7526 mm	-	1.7526 mm
Maximum supply voltage (Vsup)	-	5.5 V	5.5 V	-	5.5 V
Minimum supply voltage (Vsup)	-	3 V	3 V	-	3 V
Nominal supply voltage (Vsup)	-	3.3 V	3.3 V	-	3.3 V
surface mount	-	YES	YES	-	YES
Temperature level	-	OTHER	OTHER	-	OTHER
Terminal form	-	GULL WING	GULL WING	-	GULL WING
Terminal pitch	-	0.635 mm	0.635 mm	-	0.635 mm
Terminal location	-	DUAL	DUAL	-	DUAL
Maximum time at peak reflow temperature	-	NOT SPECIFIED	NOT SPECIFIED	-	NOT SPECIFIED
width	-	3.9116 mm	3.9116 mm	-	3.9116 mm
Base Number Matches	-	1	1	-	1

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