Os motores de busca de Datasheet de Componentes eletrônicos
  Portuguese  ▼
ALLDATASHEETPT.COM

X  

K04RLM12 Folha de dados(PDF) 10 Page - Texas Instruments

Nome de Peças K04RLM12
Descrição Electrónicos  Operational Amplifier
Download  23 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Fabricante Electrônico  TI1 [Texas Instruments]
Página de início  http://www.ti.com
Logo TI1 - Texas Instruments

K04RLM12 Folha de dados(HTML) 10 Page - Texas Instruments

Back Button K04RLM12 Datasheet HTML 6Page - Texas Instruments K04RLM12 Datasheet HTML 7Page - Texas Instruments K04RLM12 Datasheet HTML 8Page - Texas Instruments K04RLM12 Datasheet HTML 9Page - Texas Instruments K04RLM12 Datasheet HTML 10Page - Texas Instruments K04RLM12 Datasheet HTML 11Page - Texas Instruments K04RLM12 Datasheet HTML 12Page - Texas Instruments K04RLM12 Datasheet HTML 13Page - Texas Instruments K04RLM12 Datasheet HTML 14Page - Texas Instruments Next Button
Zoom Inzoom in Zoom Outzoom out
 10 / 23 page
background image
OBSOLETE
K04RLM12, LM12CL
SNOSBY8D – MAY 1999 – REVISED APRIL 2013
www.ti.com
REACTIVE LOADING
The LM12 is normally stable with resistive, inductive or smaller capacitive loads. Larger capacitive loads interact
with the open-loop output resistance (about 1
Ω) to reduce the phase margin of the feedback loop, ultimately
causing oscillation. The critical capacitance depends upon the feedback applied around the amplifier; a unity-gain
follower can handle about 0.01
μF, while more than 1 μF does not cause problems if the loop gain is ten. With
loop gains greater than unity, a speedup capacitor across the feedback resistor will aid stability. In all cases, the
op amp will behave predictably only if the supplies are properly bypassed, ground loops are controlled and high-
frequency feedback is derived directly from the output terminal, as recommended earlier.
So-called capacitive loads are not always capacitive. A high-Q capacitor in combination with long leads can
present a series-resonant load to the op amp. In practice, this is not usually a problem; but the situation should
be kept in mind.
Large capacitive loads (including series-resonant) can be accommodated by isolating the feedback amplifier from
the load as shown above. The inductor gives low output impedance at lower frequencies while providing an
isolating impedance at high frequencies. The resistor kills the Q of series resonant circuits formed by capacitive
loads. A low inductance, carbon-composition resistor is recommended. Optimum values of L and R depend upon
the feedback gain and expected nature of the load, but are not critical. A 4
μH inductor is obtained with 14 turns
of number 18 wire, close spaced, around a one-inch-diameter form.
The LM12 can be made stable for all loads with a large capacitor on the output, as shown above. This
compensation gives the lowest possible closed-loop output impedance at high frequencies and the best load-
transient response. It is appropriate for such applications as voltage regulators.
A feedback capacitor, C1, is connected directly to the output pin of the IC. The output capacitor, C2, is connected
at the output terminal with short leads. Single-point grounding to avoid dc and ac ground loops is advised.
The impedance, Z1, is the wire connecting the op amp output to the load capacitor. About 3-inches of number-18
wire (70 nH) gives good stability and 18-inches (400 nH) begins to degrade load-transient response. The
minimum load capacitance is 47
μF, if a solid-tantalum capacitor with an equivalent series resistance (ESR) of
0.1
Ω is used. Electrolytic capacitors work as well, although capacitance may have to be increased to 200 μF to
bring ESR below 0.1
Ω.
Loop stability is not the only concern when op amps are operated with reactive loads. With time-varying signals,
power dissipation can also increase markedly. This is particularly true with the combination of capacitive loads
and high-frequency excitation.
10
Submit Documentation Feedback
Copyright © 1999–2013, Texas Instruments Incorporated
Product Folder Links: K04RLM12 LM12CL


Nº de peça semelhante - K04RLM12

Fabricante ElectrônicoNome de PeçasFolha de dadosDescrição Electrónicos
logo
Amphenol Corporation
K0448 AMPHENOL-K0448 Datasheet
444Kb / 8P
   RF Mesh Networking technology provides reliable real time process data. Uses global 2.4 GHz RF frequencies
logo
List of Unclassifed Man...
K0471-K60 ETC2-K0471-K60 Datasheet
323Kb / 17P
   Multilayer Chip Capacitors
K0472-K01 ETC2-K0472-K01 Datasheet
323Kb / 17P
   Multilayer Chip Capacitors
K0472-K60 ETC2-K0472-K60 Datasheet
323Kb / 17P
   Multilayer Chip Capacitors
K0473-K60 ETC2-K0473-K60 Datasheet
323Kb / 17P
   Multilayer Chip Capacitors
More results

Descrição semelhante - K04RLM12

Fabricante ElectrônicoNome de PeçasFolha de dadosDescrição Electrónicos
logo
National Semiconductor ...
LM725 NSC-LM725 Datasheet
495Kb / 11P
   Operational Amplifier
logo
SG Micro Corp
SGM8142 SGMICRO-SGM8142 Datasheet
291Kb / 10P
   Operational Amplifier
logo
Linear Technology
RH101A LINER-RH101A_15 Datasheet
142Kb / 2P
   Operational Amplifier
RH07 LINER-RH07 Datasheet
113Kb / 4P
   Operational Amplifier
logo
Siemens Semiconductor G...
TCA321 SIEMENS-TCA321 Datasheet
739Kb / 5P
   Operational Amplifier
logo
Linear Technology
OP-05 LINER-OP-05 Datasheet
520Kb / 8P
   Operational Amplifier
RH108A LINER-RH108A Datasheet
141Kb / 4P
   Operational Amplifier
logo
Texas Instruments
LM7332 TI1-LM7332 Datasheet
1Mb / 34P
[Old version datasheet]   Operational Amplifier
OPA606 TI1-OPA606 Datasheet
113Kb / 10P
[Old version datasheet]   OPERATIONAL AMPLIFIER
OPA622 TI1-OPA622 Datasheet
361Kb / 19P
[Old version datasheet]   OPERATIONAL AMPLIFIER
logo
Linear Technology
LT1220 LINER-LT1220_15 Datasheet
271Kb / 12P
   Operational Amplifier
More results


Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23


Folha de dados Download

Go To PDF Page


Ligação URL




Privacy Policy
ALLDATASHEETPT.COM
ALLDATASHEET é útil para você?  [ DONATE ] 

Sobre Alldatasheet   |   Publicidade   |   Contato conosco   |   Privacy Policy   |   roca de Link   |   Lista de Fabricantes
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