LTKA01CN8 Linear Technology, LTKA01CN8 Datasheet

LTKA01CN8

Manufacturer Part Number

LTKA01CN8

Description

IC THERMOCOUPLE AMPLIFIER 8-DIP

Manufacturer

Linear Technology

Series

LT®r

Type

Thermocouple Conditionerr

Datasheet

1.LTK001CN8PBF.pdf (8 pages)

Specifications of LTKA01CN8

Input Type

Voltage

Output Type

Thermocouple

Current - Supply

800µA

Mounting Type

Through Hole

Package / Case

8-DIP (0.300", 7.62mm)

Lead Free Status / RoHS Status

Contains lead / RoHS non-compliant

Interface

Current page: 1 of 8
Download datasheet (101Kb)

FEATURES

DESCRIPTIO

TYPICAL APPLICATIO

■

APPLICATIO S

■

The LTK001 is a thermocouple amplifier supplied with a

matched cold junction compensator. By separating the

amplifier and compensator functions, the problem of

compensator temperature rise is virtually eliminated. The

compensator is a selected version of the LT

junction compensator. The amplifier, which is also avail-

able separately as LTKA0x has been specially selected for

0.75°C Initial Accuracy (A Version)

Extremely Low Warmup Drift

Preset Outputs for Type E, J, K, R, S, T

Single 5V to ± 20V Operation

480µA Typical Supply Current

Available in 8-Pin DIP Package

Thermocouple Cold Junction Compensation

GND

LT1025

V +

R –

V –

R4*

–

TYPE K

Type K 10mV/°C Thermometer

1025 cold

0.1µF

FULL-SCALE TRIM

100Ω

**SELECTED FOR 0°C–100°C RANGE

* R4 ≤

LT1025 TEMPERATURES ≥ 0°C.

30µA

–

V –

LTKA0x

Thermocouple Cold Junction

thermocouple applications. It has low supply current to

minimize warmup drift, very low offset voltage (<35µV),

high gain, and extremely low input bias currents (<600pA)

to allow high impedance input filters to be used without

degrading offset voltage or drift.

Matching of the kits is accomplished by separating the

compensators and amplifiers according to the polarity of

their initial (room temperature) errors. This eliminates the

need to sum the errors of the two components to find the

worst-case error.

The LTK001 has direct thermocouple outputs of

60.9µV/°C (E), 51.7µV/°C (J), 40.6µV/°C (K, T), and

5.95µV/°C (R, S). It also has a 10mV/°C output which can

be scaled to match any arbitrary thermocouple.

For multiple thermocouple applications using one com-

pensator, amplifiers may be ordered separately (LTKA0x),

still matched to the compensator.

trademarks are the property of their respective owners. For typical performance curves and

applications circuits consult the LT1025 data sheet.

R3**

255k

, R4 IS NOT REQUIRED (OPEN) FOR

V +

V –

, LTC and LT are registered trademarks of Linear Technology Corporation. All other

0.1µF

10mV/°C

OUT

Matched Amplifier

Compensator and

LTK001 TA01

LTK001

001fa

Related parts for LTKA01CN8

LTKA01CN8 Summary of contents

Page 1

... For multiple thermocouple applications using one com- pensator, amplifiers may be ordered separately (LTKA0x), still matched to the compensator. , LTC and LT are registered trademarks of Linear Technology Corporation. All other ® trademarks are the property of their respective owners. For typical performance curves and 1025 cold applications circuits consult the LT1025 data sheet. Type K 10mV/° ...

Page 2

... V TRIM – + OUT V – OVER COMP N8 PACKAGE 8-LEAD PDIP AMPLIFIER (LTKA0x) = 100°C, θ 130°C/W JMAX JA ORDER PART NUMBER AMPLIFIER ONLY (Note A) LTKA00CN8 LTKA01CN8 TOP VIEW V TRIM TRIM 1 – – OUT 5 OVER COMP + – PACKAGE 8-LEAD TO-5 METAL CAN AMPLIFIER (LTKA0x) = 150° ...

Page 3

ELECTRICAL CHARACTERISTICS T = 25° ±15V (Amplifier (Compensator PARAMETER CONDITIONS Total Temperature Error at 25°C (Note 3) Slope Error (Notes 4 and 9) 0°C ≤ Total Temperature Error at 0°C ...

Page 4

LTK001 ELECTRICAL CHARACTERISTICS The ● denotes the specifications which apply over the full operating temperature range, otherwise specifications are unless otherwise noted. S PARAMETER Temperature Error at 10mV/°C Output (Note 9) Temperature Error at Individual ...

Page 5

ELECTRICAL CHARACTERISTICS The ● denotes the specifications which apply over the full operating temperature range, otherwise specifications are ±15V 0V 25°C unless otherwise noted PARAMETER Input Offset Voltage Input ...

Page 6

LTK001 PACKAGE DESCRIPTIO SEATING PLANE 45° Package 8-Lead TO-5 Metal Can (.200 Inch PCD) (Reference LTC DWG # 05-08-1320) .335 – .370 (8.509 – 9.398) DIA .305 – .335 (7.747 – 8.509) .040 .050 (1.016) MAX (1.270) ...

Page 7

... NOTE: LEAD DIMENSIONS APPLY TO SOLDER DIP/PLATE OR TIN PLATE LEADS Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen- tation that the interconnection of its circuits as described herein will not infringe on existing patent rights Package 8-Lead CERDIP (Narrow ...

Page 8

... MAX .130 ± .005 (3.302 ± 0.127) .120 .020 (3.048) MIN (0.508) MIN .018 ± .003 (0.457 ± 0.076) N8 1002 = 280pA MAX OS = 1V/µV MAX VOL LT/LT 0305 REV A • PRINTED IN USA © LINEAR TECHNOLOGY CORPORATION 2001 001fa ...

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