AD22105

更新时间： 2024-11-10 22:38:59

品牌	Logo	应用领域
亚德诺 - ADI		开关
页数	文件大小	规格书
8页	265K
描述
Low Voltage, Resistor Programmable Thermostatic Switch

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数据手册

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AD22105 数据手册

Low Voltage, Resistor Programmable

Thermostatic Switch

AD22105

FEATURES

User-Programmable Temperature Setpoint

2.0؇C Setpoint Accuracy

FUNCTIONAL BLOCK DIAGRAM

4.0؇C Preset Hysteresis

AD22105

Wide Supply Range (+2.7 V dc to +7.0 V dc)

Wide Temperature Range (–40؇C to +150؇C)

Low Power Dissipation (230 ␮W @ 3.3 V)

200kΩ

PULL–UP

OUT

APPLICATIONS

Industrial Process Control

Thermal Control Systems

CPU Monitoring (i.e., Pentium)

Computer Thermal Management Circuits

Fan Control

SET–

POINT

GND

SET

TEMPERATURE

SENSOR

Handheld/Portable Electronic Equipment

GENERAL DESCRIPTION

The AD22105 is designed to operate on a single power supply

voltage from +2.7 V to +7.0 V facilitating operation in battery

powered applications as well as in industrial control systems.

Because of low power dissipation (230 µW @ 3.3 V), self-

heating errors are minimized and battery life is maximized.

The AD22105 is a solid state thermostatic switch. Requiring

only one external programming resistor, the AD22105 can be set

to switch accurately at any temperature in the wide operating

range of –40°C to +150°C. Using a novel circuit architecture,

the AD22105 asserts an open collector output when the ambient

temperature exceeds the user-programmed setpoint temperature.

The AD22105 has approximately 4°C of hysteresis which prevents

rapid thermal on/off cycling.

An optional internal 200 kΩ pull-up resistor is included to

facilitate driving light loads such as CMOS inputs.

Alternatively, a low power LED indicator may be driven directly.

+2.7V TO +7.0V

AD22105

TOP VIEW

SET

OUT

Figure 1. Typical Application Circuit

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.

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

Tel: 617/329-4700 Fax: 617/326-8703

12 3 4 5 6 7 8

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