Precision, 20MHz, 0.9 pA, Low-Noise, RRIO, CMOS Op Amp

48 Pages·2017·1.97 MB·English

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OPA320,OPA2320,OPA320S,OPA2320S
SBOS513F–AUGUST2010–REVISEDDECEMBER2016
OPAx320x Precision, 20-MHz, 0.9-pA, Low-Noise, RRIO,
CMOS Operational Amplifier With Shutdown
1 Features 3 Description
• PrecisionwithZero-CrossoverDistortion: The OPA320 (single) and OPA2320 (dual) are a new
1 generation of precision, low-voltage CMOS
– LowOffsetVoltage:150 µV(Maximum)
operational amplifiers optimized for very low noise
– HighCMRR:114dB and wide bandwidth while operating on a low
– Rail-to-RailI/O quiescent current ofonly1.45mA.
• LowInputBiasCurrent:0.9pA(Maximum) The OPA320 series is ideal for low-power, single-
• LowNoise:7nV/√Hzat10kHz supply applications. Low-noise (7 nV/√Hz) and high-
speed operation also make them well-suited for
• WideBandwidth:20MHz
driving sampling analog-to-digital converters (ADCs).
• SlewRate:10V/µs Other applications include signal conditioning and
• QuiescentCurrent:1.45mA/Ch sensoramplification.
• Single-SupplyVoltageRange:1.8Vto5.5V The OPA320 features a linear input stage with zero-
• OPA320SandOPA2320S: crossover distortion that delivers excellent common-
mode rejection ratio (CMRR) of typically 114 dB over
– I inShutdownMode:0.1 µA
Q the full input range. The input common mode range
• Unity-GainStable extends 100 mV beyond the negative and positive
• SmallPackages: supplyrails. Theoutputvoltagetypicallyswingswithin
10mVoftherails.
– SOT-23,VSSOP,SON,andSOIC
In addition, the OPAx320 has a wide supply voltage
2 Applications range from 1.8 V to 5.5 V with excellent PSRR
(106 dB) over the entire supply range, making them
• High-Z SensorSignalConditioning
suitable for precision, low-power applications that run
• TransimpedanceAmplifiers directlyfrombatterieswithout regulation.
• Test andMeasurementEquipment
The OPA320 (single version) is available in a 5-pin
• ProgrammableLogicControllers(PLCs) SOT23 package; the OPA320S shutdown single
• MotorControlLoops version is available in an 6-pin SOT23 package. The
dual OPA2320 is offered in 8-pin SOIC, VSSOP, and
• Communications
SON packages, and the OPA2320S (dual with
• Input/OutputADC/DACBuffers
shutdown)ina10-pinVSSOPpackage.
• ActiveFilters
DeviceInformation(1)
BlockDiagram
PARTNUMBER PACKAGE BODYSIZE(NOM)
V+ OPA320 SOT-23(5) 2.90mm×1.60mm
OPA320S SOT-23(6) 2.90mm×1.60mm
VSSOP(8) 3.00mm×3.00mm
Low Noise Charge
Pump OPA2320 SOIC(8) 4.90mm×3.91mm
SON(10) 3.00mm×3.00mm
OPA2320S VSSOP(10) 3.00mm×3.00mm
Bias Circuitry (1) For all available packages, see the orderable addendum at
theendofthedatasheet.
+IN
-IN
OUT
Input Stage Load Bias Circuitry
V-
Copyright © 2016, Texas Instruments Incorporated
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectualpropertymattersandotherimportantdisclaimers.PRODUCTIONDATA.
OPA320,OPA2320,OPA320S,OPA2320S
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Table of Contents
1 Features.................................................................. 1 7.4 DeviceFunctionalModes........................................21
2 Applications........................................................... 1 8 ApplicationandImplementation........................ 22
3 Description............................................................. 1 8.1 ApplicationInformation............................................22
4 RevisionHistory..................................................... 2 8.2 TypicalApplication..................................................26
5 PinConfigurationandFunctions......................... 4 9 PowerSupplyRecommendations...................... 28
6 Specifications......................................................... 6 10 Layout................................................................... 28
6.1 AbsoluteMaximumRatings......................................6 10.1 LayoutGuidelines.................................................28
6.2 ESDRatings..............................................................6 10.2 LayoutExample....................................................28
6.3 RecommendedOperatingConditions.......................6 11 DeviceandDocumentationSupport................. 29
6.4 ThermalInformation:OPA320andOPA320S..........6 11.1 DeviceSupport ....................................................29
6.5 ThermalInformation:OPA2320................................7 11.2 DocumentationSupport........................................30
6.6 ThermalInformation:OPA2320S..............................7 11.3 RelatedLinks........................................................30
6.7 ElectricalCharacteristics...........................................7 11.4 ReceivingNotificationofDocumentationUpdates30
6.8 TypicalCharacteristics............................................10 11.5 CommunityResource............................................30
7 DetailedDescription............................................ 16 11.6 Trademarks...........................................................30
7.1 Overview.................................................................16 11.7 ElectrostaticDischargeCaution............................30
7.2 FunctionalBlockDiagram.......................................16 11.8 Glossary................................................................31
7.3 FeatureDescription.................................................16 12 Mechanical,Packaging,andOrderable
Information........................................................... 31
4 Revision History
NOTE:Pagenumbersforpreviousrevisionsmaydifferfrompagenumbersinthecurrentversion.
ChangesfromRevisionE(June2013)toRevisionF Page
• AddedESDRatingstable,FeatureDescriptionsection,DeviceFunctionalModes,ApplicationandImplementation
section,PowerSupplyRecommendationssection,Layoutsection,DeviceandDocumentationSupportsection,and
Mechanical,Packaging,andOrderableInformationsection ................................................................................................. 1
• Changedpackagefamiliesthroughoutdatasheet:DFNtoSON,MSOPtoVSSOP,andSOtoSOIC................................ 1
ChangesfromRevisionD(November2011)toRevisionE Page
• DeletedOrderingInformationtable........................................................................................................................................ 1
• ChangedShutdown,V andV parametersinElectricalCharacteristicstable.................................................................... 8
IH IL
• AddedFigure29andFigure30............................................................................................................................................ 13
• AddedFigure31andFigure32............................................................................................................................................ 14
ChangesfromRevisionC(August2011)toRevisionD Page
• ChangedstatusofOPA2320SO-8(D)toproductiondatafromproductpreview................................................................. 1
ChangesfromRevisionB(March2010)toRevisionC Page
• DeletedD(SO-8)packagepinoutdrawingfromPinConfigurationsandFunctions.............................................................. 4
• Changednamesofpins2and6forDGS(MSOP-10)package ........................................................................................... 5
• AddedvaluestoThermalInformationtables,movedtonewpage,andupdatedformat....................................................... 6
• AddedSHDNvaluetoElectricalCharacteristicsconditionline.............................................................................................. 7
• AddednewtestconditionrowforInputBiasCurrentOverTemperatureparameter............................................................. 7
• ChangedtestconditionforPhaseMarginparameterinElectricalCharacteristics................................................................ 8
• AddedtestconditiontoShort-CircuitCurrentparameterinElectricalCharacteristics........................................................... 8
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• ChangedShutdownsubsectionofElectricalCharacteristicsalongwithassociatednotes.................................................... 8
• ChangedPowerSupplysubsectionofElectricalCharacteristics........................................................................................... 9
• ChangedFigure4................................................................................................................................................................. 10
• ChangedFigure18............................................................................................................................................................... 11
• Changed100µsto100nsinfirstparagraphofOverloadRecoveryTimesection............................................................. 20
• ChangedFigure38............................................................................................................................................................... 20
• ChangedFigure39............................................................................................................................................................... 20
• ChangedR valueinFigure44from500Ωto50kΩ............................................................................................................. 25
2
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5 Pin Configuration and Functions
OPA320DBVPackage OPA320SDBVPackage
5-PinSOT-23 6-PinSOT-23
TopView TopView
OUT 1 5 V+ VOUT 1 6 V+
V- 2 V- 2 5 SHDN
+IN 3 4 -IN +IN 3 4 -IN
PinFunctions:OPA320andOPA320S
PIN
I/O DESCRIPTION
NAME OPA320 OPA320S
–IN 4 4 I Negative(inverting)input
+IN 3 3 I Positive(noninverting)input
OUT,VOUT 1 1 O Output
SHDN — 5 I Shutdown,activelow
V– 2 2 — Negative(lowest)powersupply
V+ 5 6 — Positive(highest)powersupply
OPA2320DandDGKPackages OPA2320DRGPackage
8-PinSOICandVSSOP 8-PinSONWithExposedThermalPad
TopView TopView
OUT A 1 8 V+ OUT A 1 8 V+
Exposed
-IN A 2 7 OUT B -IN A 2 Thermal 7 OUT B
Die Pad
+IN A 3 6 -IN B +IN A 3 on 6 -IN B
Underside(2)
V- 4 5 +IN B V- 4 5 +IN B
(1) Nointernalconnection.
(2) ConnectthermalpadtoV–.
PinFunctions:OPA2320
PIN
SOIC, I/O DESCRIPTION
NAME SON
VSSOP
–INA 2 2 I Invertinginput,channelA
+INA 3 3 I Noninvertinginput,channelA
–INB 6 6 I Invertinginput,channelB
+INB 5 5 I Noninvertinginput,channelB
OUTA,
1 1 O Output,channelA
VOUTA
OUTB,
7 7 O Output,channelB
VOUTB
SHDNA — — I Shutdown,activelow,channelA
SHDNB — — I Shutdown,activelow,channelB
V– 4 4 — Negative(lowest)powersupply
V+ 8 8 — Positive(highest)powersupply
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OPA2320SDGSPackage
10-PinVSSOP
TopView
VOUT A 1 10 V+
-IN A 2 9 VOUT B
A
+IN A 3 8 -IN B
B
V- 4 7 +IN B
SHDN A 5 6 SHDN B
PinFunctions:OPA2320S
PIN
I/O DESCRIPTION
NAME NO.
–INA 2 I Invertinginput,channelA
+INA 3 I Noninvertinginput,channelA
–INB 8 I Invertinginput,channelB
+INB 7 I Noninvertinginput,channelB
OUTA,
1 O Output,channelA
VOUTA
OUTB,
9 O Output,channelB
VOUTB
SHDNA 5 I Shutdown,activelow,channelA
SHDNB 6 I Shutdown,activelow,channelB
V– 4 — Negative(lowest)powersupply
V+ 10 — Positive(highest)powersupply
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6 Specifications
6.1 Absolute Maximum Ratings
overoperatingfree-airtemperaturerange(unlessotherwisenoted)(1)
MIN MAX UNIT
Supply,V =(V+)–(V–) 6
S
Voltage V
Signalinputpin(2) (V–)–0.5 (V+)+0.5
Signalinputpin(2) –10 10
Current mA
Outputshort-circuitcurrent(3) Continuous
Operatingrange,T –40 150
A
Temperature Junction,T 150 °C
J
Storage,T –65 150
stg
(1) StressesbeyondthoselistedunderAbsoluteMaximumRatingsmaycausepermanentdamagetothedevice.Thesearestressratings
only,whichdonotimplyfunctionaloperationofthedeviceattheseoranyotherconditionsbeyondthoseindicatedunderRecommended
OperatingConditions.Exposuretoabsolute-maximum-ratedconditionsforextendedperiodsmayaffectdevicereliability.
(2) Inputterminalsarediode-clampedtothepower-supplyrails.Inputsignalsthatcanswingmorethan0.5Vbeyondthesupplyrailsshould
becurrentlimitedto10mAorless.
(3) Short-circuittoground,oneamplifierperpackage.
6.2 ESD Ratings
VALUE UNIT
Human-bodymodel(HBM),perANSI/ESDA/JEDECJS-001(1) ±4000
V Electrostaticdischarge Charged-devicemodel(CDM),perJEDECspecificationJESD22-C101(2) ±1000 V
(ESD)
Machinemodel(MM) ±200
(1) JEDECdocumentJEP155statesthat500-VHBMallowssafemanufacturingwithastandardESDcontrolprocess.
(2) JEDECdocumentJEP157statesthat250-VCDMallowssafemanufacturingwithastandardESDcontrolprocess.
6.3 Recommended Operating Conditions
overoperatingfree-airtemperaturerange(unlessotherwisenoted)
MIN MAX UNIT
V Specifiedvoltage 1.8 5.5 V
S
T Specifiedtemperature –40 125 °C
A
6.4 Thermal Information: OPA320 and OPA320S
OPA320 OPA320S
THERMALMETRIC DBV(SOT-23) DBV(SOT-23) UNIT
5PINS 6PINS
RθJA Junction-to-ambientthermalresistance(1) 219.3 177.5 °C/W
RθJC(top) Junction-to-case(top)thermalresistance 107.5 108.9 °C/W
RθJB Junction-to-boardthermalresistance 57.5 27.4 °C/W
ψJT Junction-to-topcharacterizationparameter 7.4 13.3 °C/W
ψJB Junction-to-boardcharacterizationparameter 56.9 26.9 °C/W
RθJC(bot) Junction-to-case(bottom)thermalresistance — — °C/W
(1) Formoreinformationabouttraditionalandnewthermalmetrics,seetheapplicationreport,SemiconductorandICPackageThermal
Metrics.
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6.5 Thermal Information: OPA2320
OPA2320
THERMALMETRIC(1) D(SOIC) DGK(VSSOP) DRG(SON) UNIT
8PINS 8PINS 8PINS
RθJA Junction-to-ambientthermalresistance 122.6 174.8 50.6 °C/W
RθJC(top) Junction-to-case(top)thermalresistance 67.1 43.9 54.9 °C/W
RθJB Junction-to-boardthermalresistance 64 95 25.2 °C/W
ψJT Junction-to-topcharacterizationparameter 13.2 2 0.6 °C/W
ψJB Junction-to-boardcharacterizationparameter 63.4 93.5 25.3 °C/W
RθJC(bot) Junction-to-case(bottom)thermalresistance — — 5.7 °C/W
(1) Formoreinformationabouttraditionalandnewthermalmetrics,seetheapplicationreport,SemiconductorandICPackageThermal
Metrics.
6.6 Thermal Information: OPA2320S
OPA2320S
THERMALMETRIC(1) DGS(VSSOP) UNIT
10PINS
R Junction-to-ambientthermalresistance 171.5 °C/W
θJA
R Junction-to-case(top)thermalresistance 43 °C/W
θJC(top)
R Junction-to-boardthermalresistance 91.4 °C/W
θJB
ψ Junction-to-topcharacterizationparameter 1.9 °C/W
JT
ψ Junction-to-boardcharacterizationparameter 89.9 °C/W
JB
R Junction-to-case(bottom)thermalresistance — °C/W
θJC(bot)
(1) Formoreinformationabouttraditionalandnewthermalmetrics,seetheSemiconductorandICPackageThermalMetricsapplication
report.
6.7 Electrical Characteristics
AtV =1.8Vto5.5Vor±0.9Vto±2.75V,T =25°C,R =10kΩconnectedtoV /2,V =V /2,V =V /2,and
S A L S CM S OUT S
SHDNx=V (unlessotherwisenoted).
S+
PARAMETER TESTCONDITIONS MIN TYP MAX UNIT
OFFSETVOLTAGE
VOS Inputoffsetvoltage 40 150 µV
Inputoffsetvoltage
dVOS/dT vstemperature VS=5.5V,TA=–40°Cto125°C 1.5 5 µV/°C
Inputoffsetvoltage VS=1.8Vto5.5V,TA=25°C 5 20
PSR µV/V
vspowersupply VS=1.8Vto5.5V,TA=–40°Cto125°C 15
Channelseparation 1kHz 130 dB
INPUTVOLTAGE
VCM Common-modevoltage (V–)–0.1 (V+)+0.1 V
VS=5.5V,(V–)–0.1V<VCM<(V+)+0.1V,TA=25°C 100 114
CMRR Common-moderejectionratio VS=5.5V,(V–)–0.1V<VCM<(V+)+0.1V,TA=–40°Cto 96 dB
125°C
INPUTBIASCURRENT
TA=25°C ±0.2 ±0.9
TA=–40°Cto85°C ±50
IB Inputbiascurrent pA
OPA2320andOPA2320S ±400
TA=–40°Cto125°C
OPA320andOPA320S ±600
TA=25°C ±0.2 ±0.9
IOS Inputoffsetcurrent TA=–40°Cto85°C ±50 pA
TA=–40°Cto125°C ±400
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Electrical Characteristics (continued)
AtV =1.8Vto5.5Vor±0.9Vto±2.75V,T =25°C,R =10kΩconnectedtoV /2,V =V /2,V =V /2,and
S A L S CM S OUT S
SHDNx=V (unlessotherwisenoted).
S+
PARAMETER TESTCONDITIONS MIN TYP MAX UNIT
NOISE
Inputvoltagenoise f=0.1Hzto10Hz 2.8 µVPP
f=1kHz 8.5
en Inputvoltagenoisedensity nV/√Hz
f=10kHz 7
in Inputcurrentnoisedensity f=1kHz 0.6 fA/√Hz
INPUTCAPACITANCE
Differential 5 pF
Commonmode 4 pF
OPEN-LOOPGAIN
0.1V<VO<(V+)–0.1V,RL=10kΩ,TA=25°C 114 132
0.1V<VO<(V+)–0.1V,RL=10kΩ,TA=–40°Cto125°C 100 130
AOL Open-loopvoltagegain dB
0.2V<VO<(V+)–0.2V,RL=2kΩ,TA=25°C 108 123
0.2V<VO<(V+)–0.2V,RL=2kΩ,TA=–40°Cto125°C 96 130
PM Phasemargin VS=5V,CL=50pF 47 °
FREQUENCYRESPONSE,VS=5V,CL=50pF
GBP Gainbandwidthproduct Unitygain 20 MHz
SR Slewrate G=+1 10 V/µs
to0.1%,2-Vstep,G=+1 0.25
tS Settlingtime to0.01%,2-Vstep,G=+1 0.32 µs
to0.0015%,2-Vstep,G=+1(1) 0.5
Overloadrecoverytime VIN×G>VS 100 ns
Totalharmonicdistortion+ VO=4VPP,G=1,f=10kHz,RL=10kΩ 0.0005%
THD+N noise(2) VO=2VPP,G=1,f=10kHz,RL=600Ω 0.0011%
OUTPUT
RL=10kΩ,TA=25°C 10 20
Voltageoutputswingfrom RL=2kΩ,TA=25°C 25 35
VO bothrails RL=10kΩ,TA=–40°Cto125°C 30 mV
RL=2kΩ,TA=–40°Cto125°C 45
ISC Short-circuitcurrent VS=5.5V ±65 mA
CL Capacitiveloaddrive SeeTypicalCharacteristics
RO Open-loopoutputresistance IO=0mA,f=1MHz 90 Ω
SHUTDOWN(3)
Allamplifiersdisabled,SHDN=V– 0.1 0.5 µA
Quiescentcurrentper
IQSD amplifier OPA2320Sonly,SHDNA=VS–,SHDNB=VS+ 1.6 mA
OPA2320Sonly,SHDNA=VS+,SHDNB=VS– 1.6
VIH High-levelinputvoltage Amplifierenabled,VS–+0.7[(VS+)+|VS–|] 0.7×VS+ 5.5 V
VIL Low-levelinputvoltage Amplifierdisabled,VS–+0.3[(VS+)+|VS–|] 0.3×VS+ V
tON Amplifierenabletime(4) GOP=A12,3V2O0USTo=nl0y.,1p×arVtiaS/l2s,hfuutlldsohwuntd(5o)wn(5) 206 µs
tOFF Amplifierdisabletime(4) G=1,VOUT=0.1×VS/2 3 µs
SHDNpininputbiascurrent VIH=5V 0.13
µA
(perpin) VIL=0V 0.04
(1) Basedonsimulation.
(2) Third-orderfilter;bandwidth=80kHzat–3dB.
(3) Specifiedbydesignandcharacterization;notproductiontested.
(4) Disabletime(t )andenabletime(t )aredefinedasthetimebetweenthe50%pointofthesignalappliedtotheSHDNpinandthe
OFF ON
pointatwhichtheoutputvoltagereachesthe10%(disable)or90%(enable)level.
(5) FullshutdownreferstothedualOPA2320ShavingbothAandBchannelsdisabled(SHDNA=SHDNB=V ).Forpartialshutdown,
S–
onlyoneSHDNpinisexercised;inthismode,theinternalbiasingandoscillatorremainoperationalandtheenabletimeisshorter.
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Electrical Characteristics (continued)
AtV =1.8Vto5.5Vor±0.9Vto±2.75V,T =25°C,R =10kΩconnectedtoV /2,V =V /2,V =V /2,and
S A L S CM S OUT S
SHDNx=V (unlessotherwisenoted).
S+
PARAMETER TESTCONDITIONS MIN TYP MAX UNIT
POWERSUPPLY
VS Specifiedvoltage 1.8 5.5 V
Quiescentcurrentper IO=0mA,VS=5.5V,TA=25°C 1.5 1.75
amplifier, mA
OPA320andOPA320S IO=0mA,VS=5.5V,TA=–40°Cto125°C 1.85
IQ
Quiescentcurrentper IO=0mA,VS=5.5V,TA=25°C 1.45 1.6
amplifier, mA
OPA2320andOPA2320S IO=0mA,VS=5.5V,TA=–40°Cto125°C 1.7
Power-ontime V+=0Vto5V,to90%IQlevel 28 µs
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6.8 Typical Characteristics
AtT =25°C,V =V =mid-supply,andR =10kΩ(unlessotherwisenoted).
A CM OUT L
14 25
12
%) 20
Amplifiers ( 108 of Amplifiers 15
of 6 er 10
er mb
mb 4 Nu
Nu 5
2
0 0
0.1 0.5 0.9 1.3 1.7 2.1 2.5 2.9
000000000000000000000000000
13121110-9-8-7-6-5-4-3-2-1 12345678910111213 Offset Drift (mV/°C)
----
Offset Voltage (mV)
Figure1.OffsetVoltageProductionDistribution Figure2.OffsetVoltageDriftDistribution
100 160 0
V =±2.5V
80 140 CS = 50pF -20
L
60 120 -40
mV) 40 100 -60
et Voltage ( -22000 Gain (dB) 8600 Phase --81000 Phase ()°
Offs -40 40 Gain -120
-60 20 -140
Representative Units
-80 V =±2.75V 0 -160
S
-100 -20 -180
-3 -2.5 -2 -1.5 -1 -0.5 0 0.5 1 1.5 2 2.5 3 1 10 100 1k 10k 100k 1M 10M 100M
Common-Mode Voltage (V) Frequency (Hz)
Figure3.OffsetVoltagevsCommon-ModeVoltage Figure4.Open-LoopGain/PhasevsFrequency
140 1.5
+125°C
135
10kWLoad h) 1.45
n-Loop Gain (dB) 111132210505 2kWLoad ent Current (mA/C 1.13.54 +85°C +25°C
e c
Op 110 Quies 1.3 -40°C
105
100 1.25
-50 -25 0 25 50 75 100 125 150 1.5 2 2.5 3 3.5 4 4.5 5 5.5
Temperature (°C) Supply Voltage (V)
Figure5.Open-LoopGainvsTemperature Figure6.QuiescentCurrentvsSupplyVoltage
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