AD590KH

更新时间： 2024-01-27 14:55:54

品牌	Logo	应用领域
亚德诺 - ADI		传感器换能器温度传感器
页数	文件大小	规格书
12页	151K
描述
Two-Terminal IC Temperature Transducer

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技术参数
数据手册

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AD590KH 技术参数

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

AD590KH 数据手册

Applying the AD590

GENERAL AP P LICATIO NS

Figure 12. Differential Measurem ents

Figure 10. Variable Scale Display

Figure 10 demonstrates the use of a low cost Digital Panel

Meter for the display of temperature on either the Kelvin,

Celsius or Fahrenheit scales. For Kelvin temperature Pins 9, 4

and 2 are grounded; and for Fahrenheit temperature Pins 4 and

2 are left open.

desired temperature difference. For example, the inherent

offset between the two devices can be trimmed in. If V+ and

V– are radically different, then the difference in internal

dissipation will cause a differential internal temperature rise.

T his effect can be used to measure the ambient thermal

resistance seen by the sensors in applications such as fluid level

detectors or anemometry.

T he above configuration yields a 3 digit display with 1°C or 1°F

resolution, in addition to an absolute accuracy of ±2.0°C over

the –55°C to +125°C temperature range if a one-temperature

calibration is performed on an AD590K, L, or M.

Figure 13. Cold J unction Com pensation Circuit for

Type J Therm ocouple

Figure 13 is an example of a cold junction compensation circuit

for a T ype J T hermocouple using the AD590 to monitor the

reference junction temperature. T his circuit replaces an ice-bath

as the thermocouple reference for ambient temperatures

between +15°C and +35°C. T he circuit is calibrated by

adjusting R_Tfor a proper meter reading with the measuring

junction at a known reference temperature and the circuit near

+25°C. Using components with the T Cs as specified in Figure

13, compensation accuracy will be within ±0.5°C for circuit

temperatures between +15°C and +35°C. Other thermocouple

types can be accommodated with different resistor values. Note

that the T Cs of the voltage reference and the resistors are the

primary contributors to error.

Figure 11. Series & Parallel Connection

Connecting several AD590 units in series as shown in Figure 11

allows the minimum of all the sensed temperatures to be

indicated. In contrast, using the sensors in parallel yields the

average of the sensed temperatures.

T he circuit of Figure 12 demonstrates one method by which

differential temperature measurements can be made. R1 and R2

can be used to trim the output of the op amp to indicate a

REV. B

–7–

1...4 5 678 9 10...12

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