LTKA00MH LINER [Linear Technology], LTKA00MH Datasheet

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LTKA00MH

Manufacturer Part Number
LTKA00MH
Description
Thermocouple Cold Junction Compensator and Matched Amplifier
Manufacturer
LINER [Linear Technology]
Datasheet

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Part Number:
LTKA00MH
Manufacturer:
LT
Quantity:
46
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
U
U
GND
LT1025
V
V +
U
IN
R –
V
K
0
V –
R4*
TYPE K
1%
R1
1k
*
®
Type K 10mV/°C Thermometer
1025 cold
+
0.1µF
FULL-SCALE TRIM
C1
100Ω
**SELECTED FOR 0°C–100°C RANGE
* R4 ≤
R2
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
1%
V +
V –
, LTC and LT are registered trademarks of Linear Technology Corporation. All other
C2
0.1µF
V
10mV/°C
OUT
Matched Amplifier
Compensator and
LTK001 TA01
LTK001
1
001fa

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LTKA00MH Summary of contents

Page 1

FEATURES ■ 0.75°C Initial Accuracy (A Version) ■ Extremely Low Warmup Drift ■ Preset Outputs for Type ■ Single 5V to ± 20V Operation ■ 480µA Typical Supply Current ■ Available in 8-Pin DIP ...

Page 2

... TRIM TRIM 1 – – OUT 5 OVER COMP + – PACKAGE 8-LEAD TO-5 METAL CAN AMPLIFIER (LTKA0x) = 150°C, θ = 150°C/W, θ 45°C/W JMAX JA JC ORDER PART NUMBER AMPLIFIER ONLY (Note A) LTKA00MH LTKA01MH OBSOLETE PACKAGE 001fa ...

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

PACKAGE DESCRIPTIO CORNER LEADS OPTION .045 – .068 (1.143 – 1.650) FULL LEAD OPTION .300 BSC (7.62 BSC) .008 – .018 (0.203 – 0.457) NOTE: LEAD DIMENSIONS APPLY TO SOLDER DIP/PLATE OR TIN PLATE LEADS Information furnished by Linear Technology ...

Page 8

LTK001 PACKAGE DESCRIPTIO .300 – .325 (7.620 – 8.255) .008 – .015 (0.203 – 0.381) +.035 .325 –.015 ( ) +0.889 8.255 –0.381 NOTE: 1. DIMENSIONS ARE MILLIMETERS *THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS. MOLD FLASH OR ...

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