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ADM1021A
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MFG:TOSHIBA Package Cooled:SSOP D/C:4364

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Part Number: ADM1021A

MFG: TOSHIBA

Package Cooled: SSOP

D/C: 4364

Description: The ADM1021A is a two-channel digital thermometer and under/over temperature alarm, intended for use i...

ADM1021A General Description

The ADM1021A is a two-channel digital thermometer and under/over temperature alarm, intended for use in personal computers and other systems requiring thermal monitoring and management. The device can measure the temperature of a microprocessor using a diode-connected PNP transistor, which may be provided on-chip in the case of the Pentium® III or similar processors, or 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.

ADM1021A Maximum Ratings

Positive Supply Voltage (V_DD) to GND . . . . . . 0.3 V to +6 V
D+, ADD0, ADD1 . . . . . . . . . . . . . . . 0.3 V to V_DD + 0.3 V
D to GND . . . . . . . . . . . . . . . . . . . . . . . . . . 0.3 V to +0.6 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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 650 mW
Derating above 70°C . . . . . . . . . . . . . . . . . . . . . 6.7 mW/°C
Operating Temperature Range . . . . . . . . 55°C to +125°C
Maximum Junction Temperature (T_J max) . . . . . . . . . 150°C
Storage Temperature Range . . . . . . . . . . 65°C to +150°C
Lead Temperature, (Soldering 10 sec) . . . . . . . . . . .. 300°C
IR Reflow Peak Temperature . . . . . . . . . . . . . . . . . . 220°C

ADM1021A Features

Alternative to the ADM1021
On-Chip and Remote Temperature Sensing
No Calibration Necessary
Programmable Over/Under Temperature Limits
Programmable Conversion Rate
2-Wire SMBus Serial Interface
Supports System Management Bus (SMBus) Alert
3 V to 5.5 V Supply
Small 16-Lead QSOP Package

ADM1021A Typical Application

Desktop Computers
Notebook Computers
Smart Batteries
Industrial Controllers
Telecomms Equipment
Instrumentation

ADM1021A Connection Diagram

ADM1021A datasheet

ADM1021A
PDF/DataSheet Download

Datasheet: ADM1021A
File Size: 167287 KB
Manufacturer: AD [Analog Devices]
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