or 4-Channel, 24-Bit, Simultaneously-Sampling, Delta-Sigma ADC

90 Pages·2016·2.27 MB·English

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ADS131A02,ADS131A04
SBAS590B–MARCH2016–REVISEDSEPTEMBER2016
ADS131A0x 2- or 4-Channel, 24-Bit, Analog Front-Ends for
Power Monitoring, Control, and Protection
1 Features 3 Description
• 2or4Simultaneously-SamplingDifferentialInputs The ADS131A02 and ADS131A04 are two- and four-
1 channel, simultaneously-sampling, 24-bit, delta-sigma
• DataRatesUpto128kSPS
(ΔΣ), analog-to-digital converters (ADCs). The wide
• NoisePerformance: dynamic range, scalable data rates, and internal fault
– Single-ChannelAccuracy:BetterThan0.1% at monitors make the ADS131A02 and ADS131A04
10,000:1DynamicRange ideally-suited for energy monitoring, protection, and
control applications. The ADC inputs can be
– ENOB:20.6Bitsat8kSPS
independently and directly interfaced to a resistor-
– THD:–100dBat50Hzand60Hz divider network, a transformer to measure voltage or
• IntegratedNegativeChargePump current, or a Rogowski coil to measure current.
Flexible power-supply options, including an internal
• FlexibleAnalogPower-SupplyOperation:
negative charge pump, are available to maximize the
– UsingNegativeChargePump:3.0Vto3.45V effective number of bits (ENOB) for high dynamic
– UnipolarSupply:3.3Vto5.5V rangeapplications.
– BipolarSupply: ±2.5V Asynchronous and synchronous master and slave
• DigitalSupply:1.65Vto3.6V interface options are available, providing ADC
configurationflexibilitywhenchainingmultipledevices
• Low-DriftInternalVoltageReference:4ppm/°C
in a single system. Several interface checks, ADC
• ADCSelf Checks
startup checks, and data integrity checks can be
• CyclicRedundancyCheck(CRC)andHamming enabled on the interface to report errors in the ADC
CodeError CorrectiononCommunications andduringdatatransfer.
• MultipleSPI DataInterfaceModes: The ADS131A02 and ADS131A04 support data rates
– AsynchronousInterrupt up to 128 kSPS. The complete analog front-end
(AFE) solutions are packaged in a 32-pin TQFP
– SynchronousMasterandSlave
package and are specified over the industrial
• Package:32-PinTQFP temperaturerangeof –40°Cto+125°C.
• OperatingTemperatureRange:
–40°Cto+125°C DeviceInformation(1)
PARTNUMBER PACKAGE BODYSIZE(NOM)
2 Applications
ADS131A0x TQFP(32) 5.00mm×5.00mm
• PowerProtection:CircuitBreakers,Relay (1) For all available packages, see the orderable addendum at
Protection theendofthedatasheet.
• EnergyMetering:SinglePhase,Polyphase,
SimplifiedBlockDiagram
PowerQuality
AVDD REFP REFN REFEXT IOVDD
• Test& Measurement
• BatteryTest Systems Reference Voltage
Mux Reference
• DataAcquisitionSystems Out-of-Range
Detect
M[2:0]
RESET
AIN1N
’6 ADC
AIN1P Control and CS
Serial Interface SCLK
AIN2N DIN
’6 ADC DOUT
AIN2P Watchdog DRDY
Timer DONE
AIN3N
ADS131A04 Only AAIINN43NP ’’66 AADDCC NCPehguaamrtgipvee DCatLaK I/nXtTeAgrLity XTAL1/CLKIN
AIN4P XTAL2
AVSS VNCP GND
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectualpropertymattersandotherimportantdisclaimers.PRODUCTIONDATA.
ADS131A02,ADS131A04
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Table of Contents
1 Features.................................................................. 1 9.2 FunctionalBlockDiagram.......................................22
2 Applications........................................................... 1 9.3 FeatureDescription.................................................23
3 Description............................................................. 1 9.4 DeviceFunctionalModes........................................32
9.5 Programming...........................................................34
4 RevisionHistory..................................................... 2
9.6 RegisterMaps ........................................................54
5 DeviceComparisonTable..................................... 4
10 ApplicationandImplementation........................ 66
6 PinConfigurationandFunctions......................... 4
10.1 ApplicationInformation..........................................66
7 Specifications......................................................... 6
10.2 TypicalApplication................................................73
7.1 AbsoluteMaximumRatings......................................6
10.3 Do'sandDon'ts.....................................................75
7.2 ESDRatings..............................................................6
10.4 InitializationSetUp ..............................................77
7.3 RecommendedOperatingConditions.......................7
11 PowerSupplyRecommendations..................... 79
7.4 ThermalInformation..................................................7
11.1 NegativeChargePump.........................................79
7.5 ElectricalCharacteristics...........................................8
11.2 CAPPin.................................................................79
7.6 TimingRequirements:AsynchronousInterrupt
InterfaceMode.........................................................11 11.3 Power-SupplySequencing....................................79
7.7 SwitchingCharacteristics:AsynchronousInterrupt 11.4 Power-SupplyDecoupling.....................................80
InterfaceMode.........................................................11 12 Layout................................................................... 81
7.8 TimingRequirements:SynchronousMasterInterface 12.1 LayoutGuidelines.................................................81
Mode........................................................................ 12 12.2 LayoutExample....................................................82
7.9 SwitchingCharacteristics:SynchronousMaster 13 DeviceandDocumentationSupport................. 83
InterfaceMode.........................................................12
13.1 DocumentationSupport .......................................83
7.10 TimingRequirements:SynchronousSlaveInterface
13.2 RelatedLinks........................................................83
Mode........................................................................ 13
13.3 ReceivingNotificationofDocumentationUpdates83
7.11 SwitchingCharacteristics:SynchronousSlave
InterfaceMode.........................................................13 13.4 CommunityResources..........................................83
7.12 TypicalCharacteristics..........................................15 13.5 Trademarks...........................................................83
8 ParameterMeasurementInformation................19 13.6 ElectrostaticDischargeCaution............................83
8.1 NoiseMeasurements..............................................19 13.7 Glossary................................................................83
9 DetailedDescription............................................ 22 14 Mechanical,Packaging,andOrderable
Information........................................................... 84
9.1 Overview.................................................................22
4 Revision History
NOTE:Pagenumbersforpreviousrevisionsmaydifferfrompagenumbersinthecurrentversion.
ChangesfromRevisionA(March2016)toRevisionB Page
• ReleasedADS131A02toproduction...................................................................................................................................... 1
• ChangedACPerformance,PSRR,THD,andSFDRparametersinElectricalCharacteristicstable:addedrowsfor
ADS131A02andaddedADS131A04torowsspecifictothatdevice ................................................................................... 8
• AddedmaximumspecificationtotheADS131A02,high-resolutionmoderowsofthePower-Supply(Negative
ChargePumpDisabled)parametersinElectricalCharacteristicstable............................................................................... 10
• ChangedPower-Supply(ADS131A02)parameterinElectricalCharacteristicstable:addedmaximumspecificationto
High-resolutionmoderowandchangedtypicalspecificationofLow-powermoderow....................................................... 10
• ChangedtitleofFigure27andFigure28:addedADS131A04........................................................................................... 18
• AddedFigure29andFigure30........................................................................................................................................... 19
• ChangedNoiseMeasurementssection:changedEquation1,Equation2,Table1,andTable2...................................... 19
• AddedfootnotetoFigure46 ................................................................................................................................................ 31
• ChangedR2andR3valuesinfootnoteofFigure47 .......................................................................................................... 31
• ChangedCyclicRedundancyCheck(CRC)section............................................................................................................ 37
• ChangeddescriptionofM2pinfunctionalityinHammingCodeErrorCorrectionsection................................................... 38
• ChangeddescriptionofM0pinfunctionalityinSPIInterfacesection.................................................................................. 40
• ChangedfirstcommandstatusresponsevalueinRREGS:ReadMultipleRegisterssection............................................. 51
• ChangedTable17:changedregisterbitsofrow00h,defaultsettingandregisterbitsofrow01h,andchangedbits
2-0of11h,12h,13h,and14hrows .................................................................................................................................... 54
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Revision History (continued)
• ChangedID_MSB:IDControlRegisterMSBandID_LSB:IDControlRegisterLSBregisters........................................... 55
• Changedbits2-0ofallADCx:ADCChannelDigitalGainConfigurationRegisters............................................................ 65
ChangesfromOriginal(March2016)toRevisionA Page
• ReleasedADS131A04toproduction ..................................................................................................................................... 1
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5 Device Comparison Table
PRODUCT NO.OFADCCHANNELS MAXIMUMSAMPLERATE(kSPS)
ADS131A02 2 128
ADS131A04 4 128
6 Pin Configuration and Functions
ADS131A02:PBSPackage ADS131A04:PBSPackage
32-PinTQFP 32-PinTQFP
TopView TopView
N N
KI KI
L L
C C
D 2 1 / D 2 1 /
M2 M1 M0 IOVD CAP GND XTAL XTAL M2 M1 M0 IOVD CAP GND XTAL XTAL
32 31 30 29 28 27 26 25 32 31 30 29 28 27 26 25
AIN1N 1 24 NC AIN1N 1 24 NC
AIN1P 2 23 CS AIN1P 2 23 CS
AIN2N 3 22 SCLK AIN2N 3 22 SCLK
AIN2P 4 21 DOUT AIN2P 4 21 DOUT
ADS131A02 ADS131A04
NC 5 20 DIN AIN3N 5 20 DIN
NC 6 19 DRDY AIN3P 6 19 DRDY
NC 7 18 DONE AIN4N 7 18 DONE
NC 8 17 RESET AIN4P 8 17 RESET
9 10 11 12 13 14 15 16 9 10 11 12 13 14 15 16
AVDD AVSS VNCP REFP REFN REFEX IOVDD RESV AVDD AVSS VNCP REFP REFN REFEX IOVDD RESV
T T
PinFunctions
PIN
NO. I/O DESCRIPTION(1)
NAME
ADS131A02 ADS131A04
AIN1N 1 1 Analoginput Negativeanaloginput1
AIN1P 2 2 Analoginput Positiveanaloginput1
AIN2N 3 3 Analoginput Negativeanaloginput2
AIN2P 4 4 Analoginput Positiveanaloginput2
AIN3N — 5 Analoginput Negativeanaloginput3
AIN3P — 6 Analoginput Positiveanaloginput3
AIN4N — 7 Analoginput Negativeanaloginput4
AIN4P — 8 Analoginput Positiveanaloginput4
Analogsupply.
AVDD 9 9 Supply
DecoupletheAVDDpintoAVSSwitha1-µFcapacitor.
AVSS 10 10 Supply Analogground
Digitallow-dropout(LDO)regulatoroutput.
CAP 28 28 Analogoutput
Connecta1-µFcapacitortoGND.
(1) SeetheUnusedInputsandOutputssectionforunusedpinconnections.
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PinFunctions (continued)
PIN
NO. I/O DESCRIPTION(1)
NAME
ADS131A02 ADS131A04
CS 23 23 Digitalinput Chipselect;activelow
DIN 20 20 Digitalinput Serialdatainput
DONE 18 18 Digitaloutput CommunicationDONEsignal;activelow
Serialdataoutput.
DOUT 21 21 Digitaloutput
Connecta100-kΩpullupresistortoIOVDD.
Digital Dataready;activelow;hostinterruptandsynchronizationformulti-
DRDY 19 19
input/output devices
GND 27 27 Supply Digitalground
15 15 DigitalI/Osupplyvoltage.
IOVDD Supply
29 29 Connecta1-µFcapacitortoGND.
Serialperipheralinterface(SPI)configurationmode.
IOVDD:Asynchronousinterruptmode
M0(2) 30 30 Digitalinput GND:Synchronousmastermode
Noconnection(3):Synchronousslavemode;useformulti-device
mode
SPIwordtransfersize.
M1(2) 31 31 Digitalinput IOVDD:32bit
GND:24bit
Noconnection(3):16bit
Hammingcodeenable.
M2(2) 32 32 Digitalinput IOVDD:Hammingcodewordvalidationon
GND:Hammingcodewordvalidationoff
Noconnection:reserved;donotuse
5
6
NC — — LeavefloatingorconnectdirectlytoAVSS.
7
8
NC 24 24 Digitaloutput Noconnection
Externalreferencevoltagebufferedinput.
REFEXT 14 14 Analoginput Connecta1-µFcapacitortoAVSSwhenusingtheinternal
reference.
Negativereferencevoltage.
REFN 13 13 Analoginput
ConnecttoAVSS.
Positivereferencevoltageoutput.
REFP 12 12 Analogoutput
Connecta1-µFcapacitortoREFN.
RESET 17 17 Digitalinput Systemreset;activelow
RESV 16 16 Digitalinput Reservedpin;connecttoIOVDD
Digital
SCLK 22 22 Serialdataclock
input/output
Negativechargepumpvoltageoutput.
VNCP 11 11 Analogoutput Connecta270-nFcapacitortoAVSSwhenenablingthenegative
chargepump.ConnectdirectlytoAVSSifunused.
XTAL1/CLKIN 25 25 Digitalinput Masterclockinput,crystaloscillatorbufferinput
Crystaloscillatorconnection.
XTAL2 26 26 Digitaloutput
Leavethispinunconnectedifunused.
(2) Modesignalstatesarelatchedfollowingapower-on-reset(POR).Tiethesepinshighorlowwitha<1-kΩresistor.
(3) Thispincanhavea10-pFcapacitortoGND.
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7 Specifications
7.1 Absolute Maximum Ratings(1)
MIN MAX UNIT
Chargepumpenabled –0.3 3.6
AVDDtoAVSS V
Chargepumpdisabled –0.3 6.0
IOVDDtoGND –0.3 3.9 V
AVSStoGND –3.0 0.3 V
Chargepumpenabled AVSS–1.65 AVDD+0.3
Analoginputvoltage V
Chargepumpdisabled AVSS–0.3 AVDD+0.3
VNCPtoAVSS –2.5 0.3 V
VNCPtoAVDD –6.0 0.3 V
REFEXTtoAVSS AVSS–0.3 AVDD+0.3 V
REFNinputtoAVSS AVSS–0.05 AVSS+0.05 V
CAPtoGND GND–0.3 GND+2.0 V
Digitalinputvoltage GND–0.3 IOVDD+0.3 V
Inputcurrent,continuous,anypinexceptsupplypins –10 10 mA
Junction,T 150
J
Temperature °C
Storage,T –60 150
stg
(1) StressesbeyondthoselistedunderAbsoluteMaximumRatingsmaycausepermanentdamagetothedevice.Thesearestressratings
only,whichdonotimplyfunctionaloperationofthedeviceattheseoranyotherconditionsbeyondthoseindicatedunderRecommended
OperatingConditions.Exposuretoabsolute-maximum-ratedconditionsforextendedperiodsmayaffectdevicereliability.
7.2 ESD Ratings
VALUE UNIT
Human-bodymodel(HBM),perANSI/ESDA/JEDECJS-001(1) ±1000
V Electrostaticdischarge V
(ESD) Charged-devicemodel(CDM),perJEDECspecificationJESD22-C101(2) ±500
(1) JEDECdocumentJEP155statesthat500-VHBMallowssafemanufacturingwithastandardESDcontrolprocess.
(2) JEDECdocumentJEP157statesthat250-VCDMallowssafemanufacturingwithastandardESDcontrolprocess.
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7.3 Recommended Operating Conditions
overoperatingambienttemperaturerange(unlessotherwisenoted)
MIN NOM MAX UNIT
POWERSUPPLY
NegativeChargePumpEnabled(VNCPEN(1)=1)
VAVDDtoVAVSS 3.0 3.3 3.45
Analogsupplyvoltage VAVDDtoVGND 3.0 3.3 3.45 V
VAVSStoVGND –0.05 0 0.05
Digitalsupplyvoltage(2) VIOVDDtoVGND 1.65 3.3 3.6 V
NegativeChargePumpDisabled(VNCPEN=0)
VAVDDtoVAVSS 3.0 5.0 5.5
Analogsupplyvoltage VAVDDtoVGND 1.5 2.5 5.5 V
VAVSStoVGND –2.75 –2.5 0.05
Digitalsupplyvoltage(2) VIOVDDtoVGND 1.65 3.3 3.6 V
ANALOGINPUTS
VIN Differentialinputvoltage VIN=VAINxP–VAINxN –VREF/Gain VREF/Gain V
VCM Common-modeinputvoltage(3) VAVSS VAVDD V
VNCPEN=0 VAVSS VAVDD V
VAINxP,VAINxN Absoluteinputvoltage
VNCPEN=1 VAVSS-1.5 VAVDD V
EXTERNALREFERENCE
Referenceinputvoltage REFEXT–REFN 2.0 2.5 VAVDD–0.5 V
VREFN Referencenegativeinput VAVSS V
VREFEXT Externalreferencepositiveinput VREFN+2.0 VREFN+2.5 VAVDD–0.5 V
EXTERNALCLOCKSOURCE
IOVDD>2.7V 0.4 16.384 25
fCLKIN Externalclockinputfrequency MHz
IOVDD≤2.7V 0.4 8.192 15.6
XTALclockfrequency(4) 16.384 16.5 MHz
CLKSRCbit=1,fSCLK=fICLK, 0.2 16.384 25
IOVDD>2.7V
fSCLK SCLKinputtoderivefMOD MHz
CLKSRCbit=1,fSCLK=fICLK, 0.2 8.192 15.6
IOVDD≤2.7V
DIGITALINPUTS
Digitalinputvoltage GND IOVDD V
TEMPERATURE
TA Operatingambienttemperature –40 125 °C
(1) VNCPENisbit7oftheA_SYS_CFGregister.
(2) TieIOVDDtotheCAPpinifIOVDD≤2.0V.
(3) CMRRismeasuredwithacommon-modesignalof(V +0.3V)to(V –0.3V).
AVSS AVDD
(4) SetIOVDD>3.0VtouseacrystalacrosstheXTAL1/CLKINandXTAL2pins.
7.4 Thermal Information
ADS131A0x
THERMALMETRIC(1) PBS(TQFP) UNIT
32PINS
R Junction-to-ambientthermalresistance 77.5 °C/W
θJA
R Junction-to-case(top)thermalresistance 19.0 °C/W
θJC(top)
R Junction-to-boardthermalresistance 30.2 °C/W
θJB
ψ Junction-to-topcharacterizationparameter 0.5 °C/W
JT
ψ Junction-to-boardcharacterizationparameter 30.0 °C/W
JB
R Junction-to-case(bottom)thermalresistance N/A °C/W
θJC(bot)
(1) Formoreinformationabouttraditionalandnewthermalmetrics,seetheSemiconductorandICPackageThermalMetricsapplication
report.
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7.5 Electrical Characteristics
MinimumandmaximumspecificationsapplyfromT =–40°Cto+125°C.TypicalspecificationsareatT =25°C.All
A A
specificationsareatV =3.3V,V =2.5V,V =–2.5V,VNCPEN(register0Bh,bit7)=0,internalV =2.442V,
IOVDD AVDD AVSS REF
f =16.384MHz,f =4.096MHz,datarate=8kSPS,andgain=1(unlessotherwisenoted).
CLKIN MOD
PARAMETER TESTCONDITIONS MIN TYP MAX UNIT
ANALOGINPUTS
Cs Inputcapacitance 3.5 pF
Zin Differentialinputimpedance fMOD=4.096MHz 130 kΩ
ADCPERFORMANCE
Resolution 24 Bits
Gain 1,2,4,8,16
Datarate fMOD=4.096MHz 1 128 kSPS
DCPERFORMANCE
105 111
dB
Dynamicrange VAVDD–VAVSS=5V,VREF=4V,VNCPENbit=0 115
SeeNoiseMeasurements
Allothersettings
section
INL Integralnonlinearity Bestfit 8 20 ppm
Offseterror 500 μV
Offsetdrift 1.2 3 μV/°C
Gainerror Excludingvoltagereferenceandreferencebuffererror ±0.03 %ofFS
Gaindrift Excludingvoltagereferenceandreferencebuffererror 0.25 2 ppm/°C
ACPERFORMANCE
CMRR Common-moderejectionratio fCM=50Hzor60Hz 100 dB
AVDDsupply,fPS=50Hzand60Hz,ADS131A02 80
PSRR Power-supplyrejectionratio AVDDsupply,fPS=50Hzand60Hz,ADS131A04 85 dB
IOVDDsupply,fPS=50Hzand60Hz 105
Crosstalk fIN=50Hzand60Hz –125 dB
fIN=50Hzor60Hz,VREF=2.442V,VIN=–20dBFS, 111
normalized
SNR Signal-to-noiseratio dB
fIN=50Hzor60Hz,VREF=4.0V,VIN=–20dBFS, 115
normalized
fIN=50Hzor60Hz(upto50harmonics),VIN=–0.5dBFS, –101.5
ADS131A02
THD Totalharmonicdistortion dB
fIN=50Hzor60Hz(upto50harmonics),VIN=–0.5dBFS, –103.5
ADS131A04
SINAD Signal-to-noise+distortion fIN=50Hzor60Hz(upto50harmonics),VIN=–0.5dBFS 101 dB
fIN=50Hzor60Hz(upto50harmonics),VIN=–0.5dBFS, 102.5
ADS131A02
SFDR Spurious-freedynamicrange dB
fIN=50Hzor60Hz(upto50harmonics),VIN=–0.5dBFS, 105
ADS131A04
EXTERNALREFERENCE
Referencebufferoffset TA=25°C 170 µV
Referencebufferoffsetdrift –40°C≤TA≤+125°C 1.1 4.3 µV/°C
REFEXTinputimpedance 50 MΩ
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Electrical Characteristics (continued)
MinimumandmaximumspecificationsapplyfromT =–40°Cto+125°C.TypicalspecificationsareatT =25°C.All
A A
specificationsareatV =3.3V,V =2.5V,V =–2.5V,VNCPEN(register0Bh,bit7)=0,internalV =2.442V,
IOVDD AVDD AVSS REF
f =16.384MHz,f =4.096MHz,datarate=8kSPS,andgain=1(unlessotherwisenoted).
CLKIN MOD
PARAMETER TESTCONDITIONS MIN TYP MAX UNIT
INTERNALREFERENCEVOLTAGE(REFP–REFN)
VREF_4Vbit=0 2.442
VREF Referenceoutputvoltage V
VREF_4Vbit=1,VAVDD–VAVSS>4.5V 4.0
Accuracy ±0.1%
Temperaturedrift Includingreferencebufferdrift,–40°C≤TA≤+125°C 4 20 ppm/°C
REFEXT=1-µFtoAVSS,settledto1% 0.2
Start-uptime REFEXT=1-µFtoAVSS,settledto0.1% 1.2 ms
REFEXT=1-µFtoAVSS,settledto0.01% 250
REFPsourcecapability 100 µA
EXTERNALCLOCKSOURCE
InternalICLKfrequency(SCLKoutput
fICLK inmastermode) CLKSRCbit=0 0.2 8.192 12.5 MHz
VNCPENbit=0 0.1 4.096 4.25
High-resolutionmode
VNCPENbit=1 0.512 4.096 4.25
fMOD ADCmodulatorfrequency MHz
VNCPENbit=0 0.1 1.024 1.05
Low-powermode
VNCPENbit=1 0.512 1.024 1.05
DIGITALINPUT/OUTPUT
0.8
VIH High-levelinputvoltage IOVDD IOVDD V
0.2
VIL Low-levelinputvoltage GND IOVDD V
0.8
VOH High-leveloutputvoltage IOH=1mA IOVDD V
0.2
VOL Low-leveloutputvoltage IOL=–1mA IOVDD V
IIN Inputcurrent 0V<VDigitalInput<IOVDD –10 10 μA
POWER-SUPPLY
Powerdissipation Standbymode,fCLKIN=16.384MHz 2.6 mW
POWER-SUPPLY(NegativeChargePumpEnabled,VNCPEN=1)
VNCP Negativechargepumpoutputvoltage –2.25 –1.95 –1.65 V
ADS131A02,high-resolutionmode 3.2
ADS131A02,low-powermode 0.9
AVDDcurrent mA
ADS131A04,high-resolutionmode 4.0
ADS131A04,low-powermode 1.1
ADS131A02,high-resolutionmode 0.6
ADS131A02,low-powermode 0.5
IOVDDcurrent mA
ADS131A04,high-resolutionmode 0.8
ADS131A04,low-powermode 0.5
POWER-SUPPLY(ADS131A02,VNCPEN=1,VAVDD=3.3V,VAVSS=0V)
High-resolutionmode 12.5
Powerdissipation mW
Low-powermode 4.6
POWER-SUPPLY(ADS131A04,VNCPEN=1,VAVDD=3.3V,VAVSS=0V)
High-resolutionmode 15.8
Powerdissipation mW
Low-powermode 5.3
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Electrical Characteristics (continued)
MinimumandmaximumspecificationsapplyfromT =–40°Cto+125°C.TypicalspecificationsareatT =25°C.All
A A
specificationsareatV =3.3V,V =2.5V,V =–2.5V,VNCPEN(register0Bh,bit7)=0,internalV =2.442V,
IOVDD AVDD AVSS REF
f =16.384MHz,f =4.096MHz,datarate=8kSPS,andgain=1(unlessotherwisenoted).
CLKIN MOD
PARAMETER TESTCONDITIONS MIN TYP MAX UNIT
POWER-SUPPLY(NegativeChargePumpDisabled,VNCPEN=0,VNCP=AVSS)
ADS131A02,high-resolutionmode 3.0 3.75
ADS131A02,low-powermode 0.9
AVDDcurrent mA
ADS131A04,high-resolutionmode 4.0 4.7
ADS131A04,low-powermode 1.1
ADS131A02,high-resolutionmode 0.6 0.8
ADS131A02,low-powermode 0.5
IOVDDcurrent mA
ADS131A04,high-resolutionmode 0.8 1.0
ADS131A04,low-powermode 0.5
POWER-SUPPLY(ADS131A02,VNCPEN=0,VAVDD–VAVSS=5V,VNCP=AVSS)
High-resolutionmode 17 21
Powerdissipation mW
Low-powermode 6.5
POWER-SUPPLY(ADS131A04,VNCPEN=0,VAVDD–VAVSS=5V,VNCP=AVSS)
High-resolutionmode 22.7 26.8
Powerdissipation mW
Low-powermode 7.2
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