AD590_02 INTERSIL [Intersil Corporation], AD590_02 Datasheet

AD590_02

Manufacturer Part Number

AD590_02

Description

2-Wire, Current Output Temperature Transducer

Manufacturer

INTERSIL [Intersil Corporation]

Datasheet

1.AD590_02.pdf (10 pages)

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January 2002

CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.

1-888-INTERSIL or 321-724-7143

Features

• Linear Current Output . . . . . . . . . . . . . . . . . . . . 1µA/

• Wide Temperature Range . . . . . . . . . . . -55

• Two-Terminal Device Voltage In/Current Out

• Wide Power Supply Range . . . . . . . . . . . . . +4V to +30V

• Sensor Isolation From Case

• Low Cost

Ordering Information

Pinout

AD590JH

NUMBER

PART

LINEARITY

NON-

(

±1.5

(METAL CAN)

AD590

TEMP. RANGE

-55× to 150×

Intersil and Design is a trademark of Intersil Americas Inc.

(

CASE

3 Ld Metal Can

PACKAGE

(TO-52)

C to 150

PKG.

Functional Diagram

T3.A

NO.

components, and biasing proportional to absolute temperature.

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 cur-

rent regulator, passing 1µA/

+4V and +30V. Laser trimming of the chip's thin film resistors is

used to calibrate the device to 298.2µA output at 298.2

(25

The AD590 should be used in any temperature-sensing

application between -55

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

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.

C).

SUBSTRATE

R6 820Ω

compensation

CHIP

R5 146Ω

Temperature Transducer

R3 5kΩ

R1 260Ω

Q12

2-Wire, Current Output

C to 150

Q10

K for supply voltages between

AD590

R2 1040Ω

R4 11kΩ

C in which conventional

correction

C1 26pF

File Number

Q11

discrete

3171.3

Related parts for AD590_02

AD590_02 Summary of contents

Page 1

TM January 2002 Features • Linear Current Output . . . . . . . . . . . . . . . . . . . . 1µA/ • Wide Temperature Range . . . . . . . ...

Page 2

Absolute Maximum Ratings Supply Forward Voltage (V+ to V-). . . . . . . . . . . . . . . . . . . . . . +44V Supply Reverse Voltage (V+ to ...

Trimming Out Errors The ideal graph of current versus temperature for the AD590 is a straight line, but as Figure 1 shows, the actual shape is slightly different. Since the sensor is limited to the range -55 ...

Page 4

FIGURE 5D. TRIM THREE: OFFSET AGAIN FIGURE 5. EFFECT OF SLOPE AND OFFSET TRIMMING o I Grade Maximum Errors ( C) NUMBER OF TEMPERATURE o TRIMS SPAN ( C) None 10 None 25 None 50 None 100 None 150 None ...

Page 5

J Grade Maximum Errors ( C) NUMBER OF TEMPERATURE o TRIMS SPAN ( C) None 10 None 25 None 50 None 100 None 150 None 205 One 10 One 25 One 50 One 100 One 150 One 205 Two ...

Page 6

Typical Applications + AD590 - FIGURE 6A. 423 298.2 218 o o 218 K 298 (-55 C) (25 C) TEMPERATURE FIGURE 6B. FIGURE 6. SIMPLE CONNECTION. OUTPUT IS PROPORTIONAL TO ABSOLUTE TEMPERATURE AD590 +15V ...

Page 7

The AD590 produces a temperature-dependent voltage across for filtering noise). Setting R scale-zero voltage. For the celsius scale, make R = 1kΩ and V = 0.273V. For Fahrenheit 1.8kΩ and ZERO V = 0.460V. See ...

Page 8

CMR. The table below shows the suggested val- ues. Similar scaling can be used with the ICL7126 and ICL7136. SCALE V RANGE ( lNT K 0.223 to 0.473 220 C -0.25 to +1.0 220 F -0.29 to ...

Page 9

R 13 (OPTIONAL GND shorted sensors are possible, a series resistor in series with the D line will limit the current (shown as R, above: only one is needed). ...

Page 10

Die Characteristics DIE DIMENSIONS: 37 mils x 58 mils x 14 mils ±1 mil METALLIZATION: Type: Aluminum 100% ±1k Å Å Thickness: 15k Metallization Mask Layout All Intersil products are manufactured, assembled and tested utilizing ISO9000 quality systems. Intersil Corporation’s ...

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