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AD590JH Scheda tecnica(PDF) 1 Page - Intersil Corporation

Il numero della parte AD590JH
Spiegazioni elettronici  2-Wire, Current Output Temperature Transducer
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Produttore elettronici  INTERSIL [Intersil Corporation]
Homepage  http://www.intersil.com/cda/home
Logo INTERSIL - Intersil Corporation

AD590JH Scheda tecnica(HTML) 1 Page - Intersil Corporation

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12-3
August 1997
AD590
2-Wire, Current Output
Temperature Transducer
Features
• Linear Current Output . . . . . . . . . . . . . . . . . . . . 1
µA/oK
• Wide Temperature Range . . . . . . . . . . . -55oC to 150oC
• Two-Terminal Device Voltage In/Current Out
• Wide Power Supply Range . . . . . . . . . . . . . +4V to +30V
• Sensor Isolation From Case
• Low Cost
Description
The AD590 is an integrated-circuit temperature transducer
which produces an output current proportional to absolute tem-
perature. The device acts as a high impedance constant current
regulator, passing 1
µA/oK for supply voltages between +4V and
+30V. Laser trimming of the chip's thin film resistors is used to
calibrate the device to 298.2
µA output at 298.2oK (25oC).
The AD590 should be used in any temperature-sensing
application between -55oC to 150oC in which conventional
electrical temperature sensors are currently employed. The
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 sit-
uations. Linearization circuitry, precision voltage amplifiers,
resistance measuring circuitry and cold junction compensa-
tion are not needed in applying the AD590. In the simplest
application, a resistor, a power source and any voltmeter can
be used to measure temperature.
In addition to temperature measurement, applications include
temperature
compensation
or
correction
of
discrete
components, and biasing proportional to absolute temperature.
The AD590 is particularly useful in remote sensing applica-
tions. The 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. The 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.
Ordering Information
PART
NUMBER
NON-
LINEARITY
(oC)
TEMP. RANGE
(oC)
PACKAGE
PKG.
NO.
AD590IH
±3.0
-55 to 150
3 Ld Metal Can
(TO-52)
T3.A
AD590JH
±1.5
-55 to 150
3 Ld Metal Can
(TO-52)
T3.A
Pinout
AD590
(METAL CAN)
Functional Diagram
CASE
-
1
2
3
+
Q1
Q2
Q3
Q4
Q5
Q6
Q7
Q8
Q9
Q10
Q11
Q12
R1 260
R2 1040
C1 26pF
R3 5k
R4 11k
R6 820
R5 146
1
1
8
-
+
CHIP
SUBSTRATE
File Number
3171.1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
http://www.intersil.com or 407-727-9207
| Copyright
© Intersil Corporation 1999


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