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參數(shù)資料
| 型號： | AD590JFZ |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | 溫度/濕度傳感器 |
| 英文描述： | ANALOG TEMP SENSOR-CURRENT, 298.2uA, RECTANGULAR, THROUGH HOLE MOUNT |
| 封裝： | CERAMIC, FP-2 |
| 文件頁數(shù)： | 13/16頁 |
| 文件大?。?/td> | 339K |
| 代理商： | AD590JFZ |
AD590
Rev. E | Page 6 of 16
PRODUCT DESCRIPTION
The AD590 is a 2-terminal temperature-to-voltage transducer. It
is available in a variety of accuracy grades and packages. When
using the AD590 in die form, the chip substrate must be kept
electrically isolated (floating) for correct circuit operation.
THE AD590 IS AVAILABLE IN LASER-TRIMMED CHIP FORM;
CONSULT THE CHIP CATALOG FOR DETAILS
V+
V–
42MILS
66MILS
00533-
003
Figure 5. Metallization Diagram
The AD590 uses a fundamental property of the silicon
transistors from which it is made to realize its temperature
proportional characteristic: if two identical transistors are
operated at a constant ratio of collector current densities, r,
then the difference in their base-emitter voltage is (kT/q)(In r).
Because both k (Boltzman’s constant) and q (the charge of an
electron) are constant, the resulting voltage is directly
proportional to absolute temperature (PTAT). 1
In the AD590, this PTAT voltage is converted to a PTAT current
by low temperature coefficient thin-film resistors. The total
current of the device is then forced to be a multiple of this
PTAT current. Figure 6 is the schematic diagram of the AD590.
In this figure, Q8 and Q11 are the transistors that produce the
PTAT voltage. R5 and R6 convert the voltage to current. Q10,
whose collector current tracks the collector currents in Q9 and
Q11, supplies all the bias and substrate leakage current for the
rest of the circuit, forcing the total current to be PTAT. R5 and
R6 are laser-trimmed on the wafer to calibrate the device at 25°C.
Figure 7 shows the typical V–I characteristic of the circuit at
25°C and the temperature extremes.
00
53
3-
00
4
Q1
Q2
R2
1040
Q5
Q3
Q4
C1
26pF
Q6
Q7
Q12
R4
11k
Q8
Q10
Q9
CHIP
SUBSTRATE
Q11
1
8
R5
146
R6
820
R1
260
+
–
R3
5k
Figure 6. Schematic Diagram
00
53
3-
0
05
01
2
+150°C
423
298
218
+25°C
I OU
T
(
A)
–55°C
34
SUPPLY VOLTAGE (V)
56
30
Figure 7. V–I Plot
1 For a more detailed description, see M.P. Timko, “A Two-Terminal IC
Temperature Transducer,” IEEE J. Solid State Circuits, Vol. SC-11, p. 784-788,
Dec. 1976. Understanding the Specifications–AD590.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AD590JH | 功能描述:IC TEMP TRANSDUCER 2-TERM TO52-3 RoHS:是 類別:傳感器，轉(zhuǎn)換器 >> 溫度 系列:- 其它有關(guān)文件:DS1820 Digital Thermometer 標(biāo)準(zhǔn)包裝:500 系列:- 感應(yīng)溫度:-55°C ~ 125°C 輸出類型:開路漏極 電源電壓:3 V ~ 5.5 V 精確度:±0.5°C 封裝/外殼:TO-226-3、TO-92-3 標(biāo)準(zhǔn)主體 供應(yīng)商設(shè)備封裝:TO-92 包裝:散裝 |
| AD590JH | 制造商:Analog Devices 功能描述:SEMICONDUCTORSLINEAR |
| AD590JH/+ | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Temperature Transducer/Sensor |
| AD590JH/883 | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| AD590JH/883B | 功能描述:板上安裝溫度傳感器 TEMPERATURE TRANSDUCER IC RoHS:否 制造商:Omron Electronics 輸出類型:Digital 配置: 準(zhǔn)確性:+/- 1.5 C, +/- 3 C 溫度閾值: 數(shù)字輸出 - 總線接口:2-Wire, I2C, SMBus 電源電壓-最大:5.5 V 電源電壓-最小:4.5 V 最大工作溫度:+ 50 C 最小工作溫度:0 C 關(guān)閉: 安裝風(fēng)格: 封裝 / 箱體: 設(shè)備功能:Temperature and Humidity Sensor |
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