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AD590J PDF预览

AD590J

更新时间: 2024-02-15 16:32:40
品牌 Logo 应用领域
亚德诺 - ADI 传感器温度传感器
页数 文件大小 规格书
12页 151K
描述
Two-Terminal IC Temperature Transducer

AD590J 技术参数

生命周期:Obsolete包装说明:,
Reach Compliance Code:unknownHTS代码:8542.39.00.01
风险等级:5.84Base Number Matches:1

AD590J 数据手册

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Two-Terminal IC  
Temperature Transducer  
a
AD590  
P IN D ESIGNATIO NS  
FEATURES  
Linear Current Output: 1 A/ K  
Wide Range: –55؇C to +150؇C  
Probe Com patible Ceram ic Sensor Package  
Tw o Term inal Device: Voltage In/ Current Out  
Laser Trim m ed to ؎0.5؇C Calibration Accuracy (AD590M)  
Excellent Linearity: ؎0.3؇C Over Full Range (AD590M)  
Wide Pow er Supply Range: +4 V to +30 V  
Sensor Isolation from Case  
Low Cost  
P RO D UCT D ESCRIP TIO N  
P RO D UCT H IGH LIGH TS  
T he AD590 is a two-terminal integrated circuit temperature  
transducer that produces an output current proportional to  
absolute temperature. For supply voltages between +4 V and  
+30 V the device acts as a high impedance, constant current  
regulator passing 1 µA/K. Laser trimming of the chip’s thin-film  
resistors is used to calibrate the device to 298.2 µA output at  
298.2K (+25°C).  
1. T he AD590 is a calibrated two terminal temperature sensor  
requiring only a dc voltage supply (+4 V to +30 V). Costly  
transmitters, filters, lead wire compensation and linearization  
circuits are all unnecessary in applying the device.  
2. State-of-the-art laser trimming at the wafer level in conjunc-  
tion with extensive final testing ensures that AD590 units are  
easily interchangeable.  
T he AD590 should be used in any temperature sensing applica-  
tion below +150°C in which conventional electrical temperature  
sensors are currently employed. T he inherent low cost of a  
monolithic integrated circuit combined with the elimination of  
support circuitry makes the AD590 an attractive alternative for  
many temperature measurement situations. Linearization  
circuitry, precision voltage amplifiers, resistance measuring  
circuitry and cold junction compensation are not needed in  
applying the AD590.  
3. Superior interface rejection results from the output being a  
current rather than a voltage. In addition, power require-  
ments are low (1.5 mWs @ 5 V @ +25°C.) T hese features  
make the AD590 easy to apply as a remote sensor.  
4. T he high output impedance (>10 M) provides excellent  
rejection of supply voltage drift and ripple. For instance,  
changing the power supply from 5 V to 10 V results in only  
a 1 µA maximum current change, or 1°C equivalent error.  
5. T he AD590 is electrically durable: it will withstand a forward  
voltage up to 44 V and a reverse voltage of 20 V. Hence, sup-  
ply irregularities or pin reversal will not damage the device.  
In addition to temperature measurement, applications include  
temperature compensation or correction of discrete compo-  
nents, biasing proportional to absolute temperature, flow  
rate measurement, level detection of fluids and anemometry.  
T he AD590 is available in chip form making, it suitable for  
hybrid circuits and fast temperature measurements in protected  
environments.  
T he AD590 is particularly useful in remote sensing applications.  
T he device is insensitive to voltage drops over long lines due to  
its high impedance current output. Any well insulated twisted  
pair is sufficient for operation hundreds of feet from the  
receiving circuitry. T he output characteristics also make the  
AD590 easy to multiplex: the current can be switched by a  
CMOS multiplexer or the supply voltage can be switched by a  
logic gate output.  
REV. B  
Inform ation furnished by Analog Devices is believed to be accurate and  
reliable. However, no responsibility is assum ed by Analog Devices for its  
use, nor for any infringem ents of patents or other rights of third parties  
which m ay result from its use. No license is granted by im plication or  
otherwise under any patent or patent rights of Analog Devices.  
One Technology Way, P.O. Box 9106, Norw ood, MA 02062-9106, U.S.A.  
Tel: 617/ 329-4700  
Fax: 617/ 326-8703  
World Wide Web Site: http:/ / w w w .analog.com  
© Analog Devices, Inc., 1997  

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