データシートサーチシステム
  Japanese  ▼
ALLDATASHEET.JP

X  

LM134H データシート(PDF) 7 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor. Click here to check the latest version.
部品番号 LM134H
部品情報  3-Terminal Adjustable Current Sources
Download  14 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
メーカー  NSC [National Semiconductor (TI)]
ホームページ  http://www.national.com
Logo NSC - National Semiconductor (TI)

LM134H データシート(HTML) 7 Page - National Semiconductor (TI)

Back Button LM134H Datasheet HTML 3Page - National Semiconductor (TI) LM134H Datasheet HTML 4Page - National Semiconductor (TI) LM134H Datasheet HTML 5Page - National Semiconductor (TI) LM134H Datasheet HTML 6Page - National Semiconductor (TI) LM134H Datasheet HTML 7Page - National Semiconductor (TI) LM134H Datasheet HTML 8Page - National Semiconductor (TI) LM134H Datasheet HTML 9Page - National Semiconductor (TI) LM134H Datasheet HTML 10Page - National Semiconductor (TI) LM134H Datasheet HTML 11Page - National Semiconductor (TI) Next Button
Zoom Inzoom in Zoom Outzoom out
 7 / 14 page
background image
Application Hints (Continued)
This circuit will eliminate most of the LM134’s temperature
coefficient, and it does a good job even if the estimates of the
diode’s characteristics are not accurate (as the following ex-
ample will show). For lowest tempco with a specific diode at
the desired I
SET, however, the circuit should be built and
tested over temperature. If the measured tempco of I
SET is
positive, R
2 should be reduced. If the resulting tempco is
negative, R
2 should be increased. The recommended diode
for use in this circuit is the 1N457 because its tempco is cen-
tered at 11 times the tempco of the LM134, allowing R
2 =10
R
1. You can also use this circuit to create a current source
with non-zero tempcos by setting the tempco component of
the tempco equation to the desired value instead of 0.
EXAMPLE: A 1mA, Zero-Tempco Current Source
First, solve for R
1 and R2:
The values of R
1 and R2 can be changed to standard 1% re-
sistor values (R
1 = 133Ω and R2 = 1.33kΩ) with less than a
0.75% error.
If the forward voltage drop of the diode was 0.65V instead of
the estimate of 0.6V (an error of 8%), the actual set current
will be
an error of less than 5%.
If the estimate for the tempco of the diode’s forward voltage
drop was off, the tempco cancellation is still reasonably ef-
fective. Assume the tempco of the diode is 2.6mV/˚C instead
of 2.5mV/˚C (an error of 4%). The tempco of the circuit is
now:
A 1mA LM134 current source with no temperature compen-
sation would have a set resistor of 68
Ω and a resulting
tempco of
So even if the diode’s tempco varies as much as ±4% from
its estimated value, the circuit still eliminates 98% of the
LM134’s inherent tempco.
Typical Applications
Ground Referred Fahrenheit Thermometer
DS005697-15
*Select R3 = VREF/583µA. VREF may be any stable positive voltage ≥ 2V
Trim R3 to calibrate
www.national.com
7


同様の部品番号 - LM134H

メーカー部品番号データシート部品情報
logo
Linear Technology
LM134H LINER-LM134H Datasheet
156Kb / 12P
   Constant Current Source and Temperature Sensor
logo
National Semiconductor ...
LM134H NSC-LM134H Datasheet
755Kb / 14P
   3-Terminal Adjustable Current Sources
logo
Texas Instruments
LM134H TI-LM134H Datasheet
1Mb / 26P
[Old version datasheet]   LM134/LM234/LM334 3-Terminal Adjustable Current Sources
LM134H TI-LM134H Datasheet
1Mb / 26P
[Old version datasheet]   LM134/LM234/LM334 3-Terminal Adjustable Current Sources
LM134H TI1-LM134H Datasheet
1Mb / 25P
[Old version datasheet]   LM134/LM234/LM334 3-Terminal Adjustable Current Sources
More results

同様の説明 - LM134H

メーカー部品番号データシート部品情報
logo
National Semiconductor ...
LM134 NSC-LM134_05 Datasheet
755Kb / 14P
   3-Terminal Adjustable Current Sources
logo
Texas Instruments
LM134 TI1-LM134_16 Datasheet
1Mb / 26P
[Old version datasheet]   3-Terminal Adjustable Current Sources
logo
STMicroelectronics
LM134-LM234 STMICROELECTRONICS-LM134-LM234 Datasheet
109Kb / 10P
   THREE TERMINAL ADJUSTABLE CURRENT SOURCES
LM134 STMICROELECTRONICS-LM134_07 Datasheet
500Kb / 16P
   Three terminal adjustable current sources
LM134 STMICROELECTRONICS-LM134_03 Datasheet
1Mb / 11P
   THREE TERMINAL ADJUSTABLE CURRENT SOURCES
logo
Texas Instruments
LM234Z-6 TI1-LM234Z-6 Datasheet
1Mb / 25P
[Old version datasheet]   LM134/LM234/LM334 3-Terminal Adjustable Current Sources
LM134 TI-LM134_15 Datasheet
1Mb / 26P
[Old version datasheet]   LM134/LM234/LM334 3-Terminal Adjustable Current Sources
LM334M TI1-LM334M Datasheet
1Mb / 26P
[Old version datasheet]   LM134/LM234/LM334 3-Terminal Adjustable Current Sources
LM334M TI-LM334M Datasheet
1Mb / 26P
[Old version datasheet]   LM134/LM234/LM334 3-Terminal Adjustable Current Sources
LM234Z-6 TI-LM234Z-6 Datasheet
1Mb / 26P
[Old version datasheet]   LM134/LM234/LM334 3-Terminal Adjustable Current Sources
More results


Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14


データシート ダウンロード

Go To PDF Page


リンク URL




プライバシーポリシー
ALLDATASHEET.JP
ALLDATASHEETはお客様のビジネスに役立ちますか?  [ DONATE ] 

Alldatasheetは   |   広告   |   お問い合わせ   |   プライバシーポリシー   |   リンク交換   |   メーカーリスト
All Rights Reserved©Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn
Indian : Alldatasheet.in  |   Mexican : Alldatasheet.com.mx  |   British : Alldatasheet.co.uk  |   New Zealand : Alldatasheet.co.nz
Family Site : ic2ic.com  |   icmetro.com