AD22103KCHIPS AD [Analog Devices], AD22103KCHIPS Datasheet

AD22103KCHIPS

Manufacturer Part Number

AD22103KCHIPS

Description

3.3 V Supply, Voltage Output Temperature Sensor with Signal Conditioning

Manufacturer

AD [Analog Devices]

Datasheet

1.AD22103KCHIPS.pdf (6 pages)

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GENERAL DESCRIPTION

The AD22103 is a monolithic temperature sensor with on-chip

signal conditioning. It can be operated over the temperature

range 0 C to +100 C, making it ideal for use in numerous 3.3 V

applications.

The signal conditioning eliminates the need for any trimming,

buffering or linearization circuitry, greatly simplifying the system

design and reducing the overall system cost.

The output voltage is proportional to the temperature times the

supply voltage (ratiometric). The output swings from 0.25 V at

0 C to +3.05 V at +100 C using a single +3.3 V supply.

Due to its ratiometric nature, the AD22103 offers a cost effec-

tive solution when interfacing to an analog-to-digital converter.

This is accomplished by using the ADC’s power supply as a ref-

erence to both the ADC and the AD22103 (See Figure 1),

eliminating the need for and cost of a precision reference.

REV. 0

Information furnished by Analog Devices is believed to be accurate and

reliable. However, no responsibility is assumed by Analog Devices for its

use, nor for any infringements of patents or other rights of third parties

which may result from its use. No license is granted by implication or

otherwise under any patent or patent rights of Analog Devices.

Protected by U.S. Patent Nos. 5030849 and 5243319

FEATURES

3.3 V, Single Supply Operation

Temperature Coefficient of 28 mV/ C

100 C Temperature Span (0 C to +100 C)

Accuracy Better Than 2.5% of Full Scale

Linearity Better Than 0.5% of Full Scale

Output Proportional to Temperature

Minimal Self-Heating

High Level, Low Impedance Output

Reverse Supply Protected

APPLICATIONS

Microprocessor Thermal Management

Battery and Low Powered Systems

Power Supply Temperature Monitoring

System Temperature Compensation

Board Level Temperature Sensing

MARKETS

Computers

Portable Electronic Equipment

Industrial Process Control

Instrumentation

3.3 V Supply, Voltage Output Temperature

One Technology Way, P.O. Box 9106, Norwood. MA 02062-9106, U.S.A.

Tel: 617/329-4700

Sensor with Signal Conditioning

AD22103

SIMPLIFIED BLOCK DIAGRAM

Figure 1. Application Circuit

SIGNAL OUTPUT

DIRECT TO ADC

+3.3V

0.1µF

AD22103*

REFERENCE

INPUT

CONVERTER

ANALOG TO

Fax: 617/326-8703

DIGITAL

OUT

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AD22103KCHIPS Summary of contents

Page 1

FEATURES 3.3 V, Single Supply Operation Temperature Coefficient of 28 mV/ C 100 C Temperature Span ( +100 C) Accuracy Better Than 2.5% of Full Scale Linearity Better Than 0.5% of Full Scale Output Proportional to Temperature ...

Page 2

AD22103–SPECIFICATIONS Parameter TRANSFER FUNCTION TEMPERATURE COEFFICIENT TOTAL ERROR Initial Error Error over Temperature MIN MAX Nonlinearity MIN MAX OUTPUT CHARACTERISTICS Nominal Output Voltage ...

Page 3

... AD22103KT +100 C TO-92 AD22103KR +100 C SOIC AD22103KChips* +25 C N/A *Minimum purchase quantities of 100 pieces for all chip orders. CAUTION ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily accumulate on the human body and test equipment and can discharge without detection. ...

Page 4

AD22103 THEORY OF OPERATION The AD22103 is a ratiometric temperature sensor IC whose output voltage is proportional to power supply voltage. The heart of the sensor is a proprietary temperature-dependent resis- tor, similar to an RTD, which is built into ...

Page 5

THERMAL ENVIRONMENT EFFECTS The thermal environment in which the AD22103 is used deter- mines two performance traits: the effect of self-heating on accu- racy and the response time of the sensor to rapid changes in temperature. In the first case, ...

Page 6

AD22103 0.0098 (0.25) 0.0040 (0.10) OUTLINE DIMENSIONS Dimensions shown in inches and (mm). TO-92 0.205 (5.20) 0.135 0.175 (4.96) (3.43) MIN 0.210 (5.33) 0.170 (4.38) 0.050 SEATING (1.27) PLANE MAX 0.019 (0.482) 0.500 0.016 (0.407) (12.70) SQUARE MIN 0.055 (1.39) ...

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