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參數(shù)資料
| 型號(hào)： | CA3193E |
| 廠商： | HARRIS SEMICONDUCTOR |
| 元件分類： | 運(yùn)動(dòng)控制電子 |
| 英文描述： | 1.2MHz, BiCMOS Precision Operational Amplifiers |
| 中文描述： | OP-AMP, 500 uV OFFSET-MAX, 1.2 MHz BAND WIDTH, PDIP8 |
| 文件頁數(shù)： | 6/11頁 |
| 文件大?。?/td> | 544K |
| 代理商： | CA3193E |
65
ApplicationInformation
CircuitDescription
The block diagram of the CA3193 amplifier shows the
voltagegainandsupplycurrentforeachofitsfouramplifier
stages.Simplifiedandcompleteschematicdiagramsofthe
CA3193amplifierareshowninFigures5and6,respectively.
A quad of physically cross-connected NPN transistors
comprisetheinput-stagedifferentialpair(Q
1
,Q
2
inFigures
5and6);thisarrangementcontributestothelowinputoffset-
voltagecharacteristicsoftheamplifier.Theultra-highgain
providedinthefirststageensuresthatsubsequentstages
cannot significantly influence the overall offset-voltage
characteristicsoftheamplifier.Highloadimpedancesforthe
input-stage differential pair (Q
1
, Q
2
) are provided by the
cascode-connected PNP transistors Q
3
, Q
5
and Q
4
, Q
6
,
therebycontributingtothehighgaindevelopedinthestage.
Thesecondstageoftheamplifierconsistsofadifferential
amplifieremployingPMOS/FETs(Q
7
,Q
8
inFigures5and6)
with appropriate drain loading. Since Q
7
and Q
8
are
M0S/FETs, their loading on the first stage is quite low,
therebymakinganadditionalcontributiontothehighgain
developedinthefirststage.Thesecondstageisalsoconfig-
uredtoconvertitsdifferentialsignaltoasingle-endedoutput
signalbymeansofcurrentmirrorD
9
,Q
30
(Figures5and6)
todrivesubsequentgainstage.
The third stage of the amplifier consists of Darlington-
connectedNPNtransistors(Q
17
,Q
19
inFigures5and6),
driving the quasi-complementary Class AB output stage
(Q
14
andQ
15
,Q
16
inFigures5and6).Output-stageshort-
circuit protection is activated by voltage drops developed
acrossthe60
resistorsadjacenttotheoutputterminal(R
9
andR
10
,Figure6).Whenthevoltagedropdevelopedacross
eitheroftheseresistorsreachesapotentialequalto1V
BE
,
therespectiveprotectivetransistor(Q
12
orQ
13
)isactivated
andshuntsthebasedrivefromthebasesoftheoutputstage
transistors(Q
14
andQ
15
,Q
16
).
InternalfrequencycompensationfortheCA3193amplifieris
provided by two internal networks, a 6pF capacitor
connectedbetweentheinput-stagetransistorcollectorsand
thenodebetweenthethirdandoutputstagesandasecond
network, consisting of a 20pF capacitor in series with a
7.5k
resistor connected between the input and output
nodesofthethirdstage.
OffsetVoltageNulling
Theinputoffsetvoltagecanbenulledtozerobyanyofthe
threemethodsshowninthetablebelow.A10Kpotentiome-
terbetweenterminals1and5,withitswiperreturnedtoV-,
willprovidea grossnulling foralltypes.Forfiner nulling,
eitheroftheothertwocircuitsshownbelowmaybeused,
thusprovidingsimplerimprovedresolutionforalltypes.
CAUTION: The CA3193 amplifiers will be damaged if they are
pluggedintoopampcircuitsemployingnullingwithrespecttothe
V+supplybus.
OffsetVoltageNulling
OFFSETNULLING
CIRCUITS
TYPE
RESISTORRVALUE
RESISTORRVALUE
RESISTORRVALUE
CA3193A
10K
50K
10K
CA3193
10K
20K
5K
GrossOffsetAdjustment
FinerOffsetAdjustments
1
5
R
V-
1
5
10K
V-
R
1K
V-
R
R
1
5
CA3193,CA3193A
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| CA3193S | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Analog IC |
| CA3193T | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Analog IC |
| CA3194 | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:Single Chip PAL Luminance/Chroma Processor |
| CA3194E | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| CA3195E | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
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