and 12-Ch, 4-kSPS Delta-Sigma ADC With PGA and Voltage Reference datasheet

108 Pages·2017·2.38 MB·English

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ADS114S06,ADS114S08
SBAS815A–FEBRUARY2017–REVISEDJUNE2017
ADS114S0x Low-Power, Low-Noise, Highly Integrated, 6- and 12-Channel,
4-kSPS, 16-Bit, Delta-Sigma ADC with PGA and Voltage Reference
1 Features 3 Description
• LowPowerConsumption:AsLowas280 µA The ADS114S06 and ADS114S08 are precision, 16-
1 bit, delta-sigma (ΔΣ), analog-to-digital converters
• ProgrammableGain:1to128
(ADCs) that offer low power consumption and many
• ProgrammableDataRates:2.5SPSto4kSPS integrated features to reduce system cost and
• Simultaneous50-Hzand60-HzRejectionat component count in applications measuring small-
≤20SPS withLow-LatencyDigital Filter signalsensors.
• AnalogMultiplexerwith12(ADS114S08)or6 These ADCs feature configurable digital filters that
(ADS114S06)IndependentlySelectableInputs offer low-latency conversion results and 50-Hz or
60-Hz rejection for noisy industrial environments. A
• Dual-MatchedProgrammableCurrentSourcesfor
low-noise, programmable gain amplifier (PGA)
SensorExcitation:10 µAto2000 µA
provides gains ranging from 1 to 128 to amplify low-
• InternalReference:2.5V,10ppm/°C(max)Drift level signals for resistive bridge or thermocouple
• InternalOscillator:4.096MHz,1.5%Accuracy applications. Additionally, these devices integrate a
low-drift, 2.5-V reference that reduces printed circuit
• InternalTemperatureSensor
board (PCB) area. Finally, two programmable
• ExtendedFaultDetectionCircuits
excitation current sources (IDACs) allow for easy and
• Self OffsetandSystemCalibration accurateRTDbiasing.
• FourGeneral-PurposeI/Os
An input multiplexer supports 12 inputs for the
• SPI-CompatibleInterfacewithOptionalCRC ADS114S08 and six inputs for the ADS114S06 that
• AnalogSupply:Unipolar(2.7Vto5.25V)or can be connected to the ADC in any combination for
design flexibility. In addition, these devices include
Bipolar(±2.5V)
features such as sensor burn-out detection, voltage
• DigitalSupply:2.7Vto3.6V
bias for thermocouples, system monitoring, and four
• OperatingTemperature: –50°Cto+125°C general-purposeI/Os.
The devices are offered in a leadless VQFN-32 or a
2 Applications
TQFP-32package.
• SensorTransducersandTransmitters:
Temperature,Pressure,Strain,Flow DeviceInformation
• PLCandDCSAnalogInputModules ORDERNUMBER PACKAGE(PIN) BODYSIZE
• TemperatureControllers TQFP(32) 5.0mm×5.0mm
ADS114S0x
• ClimateChambers,IndustrialOvens VQFN(32) 5.0mm×5.0mm
FunctionalBlockDiagram
AVDD AVSS-SW REFN0 REFP0 REFCOMREFOUT DDVVDDDD IOVDD
Burnout
Detect Reference 2.5-V ADS114S06
Excitation Mux Reference ADS114S08
AINCOM Current
AIN0 Sources Reference
AIN1 Detection
AAIINN23 VBIAS ReBfuefrfeenrsce START/SYNC
RESET
AIN6 / REAAFIINNP451 IMnpuuxt PGA 16A-BDitC ß(cid:8) ConDFfiigigltuietarralble InCStoaeennrrftidaaroclel SCCSLK
AIN7 / REFN1 PGA Rail DIN
AIN8/ GPIO0 Detection DOUT/DRDY
AIN9/ GPIO1 Power Supplies SyCsatelibmr-a,t iSoenlf- DRDY
AIN10/ GPIO2 Temperature
AIN11 / GPIO3 Sensor
ADS114S08 Burnout 4O.0s9c6il-laMtoHrz CLK
Only Detect
AVSS DGND
Copyright © 2017, 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.
ADS114S06,ADS114S08
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Table of Contents
1 Features.................................................................. 1 9.6 RegisterMap...........................................................70
2 Applications........................................................... 1 10 ApplicationandImplementation........................ 84
3 Description............................................................. 1 10.1 ApplicationInformation..........................................84
4 RevisionHistory..................................................... 2 10.2 TypicalApplication................................................89
10.3 Do'sandDon'ts.....................................................94
5 DeviceFamilyComparisonTable........................ 3
11 PowerSupplyRecommendations..................... 96
6 PinConfigurationandFunctions......................... 3
11.1 PowerSupplies.....................................................96
7 Specifications......................................................... 5
11.2 Power-SupplySequencing....................................96
7.1 AbsoluteMaximumRatings .....................................5
11.3 Power-OnReset....................................................96
7.2 ESDRatings..............................................................5
11.4 Power-SupplyDecoupling.....................................96
7.3 RecommendedOperatingConditions.......................6
12 Layout................................................................... 97
7.4 ThermalInformation..................................................6
12.1 LayoutGuidelines.................................................97
7.5 ElectricalCharacteristics...........................................7
12.2 LayoutExample....................................................98
7.6 TimingCharacteristics.............................................12
13 DeviceandDocumentationSupport................. 99
7.7 SwitchingCharacteristics........................................12
7.8 TypicalCharacteristics............................................15 13.1 DeviceSupport......................................................99
13.2 DocumentationSupport........................................99
8 ParameterMeasurementInformation................22
13.3 RelatedLinks........................................................99
8.1 NoisePerformance.................................................22
13.4 ReceivingNotificationofDocumentationUpdates99
9 DetailedDescription............................................ 27
13.5 CommunityResources..........................................99
9.1 Overview.................................................................27
13.6 Trademarks...........................................................99
9.2 FunctionalBlockDiagram.......................................28
13.7 ElectrostaticDischargeCaution............................99
9.3 FeatureDescription.................................................29
13.8 Glossary..............................................................100
9.4 DeviceFunctionalModes........................................56
14 Mechanical,Packaging,andOrderable
9.5 Programming...........................................................60
Information......................................................... 100
4 Revision History
NOTE:Pagenumbersforpreviousrevisionsmaydifferfrompagenumbersinthecurrentversion.
ChangesfromOriginal(February2017)toRevisionA Page
• Releasedtoproduction.......................................................................................................................................................... 1
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5 Device Family Comparison Table
PRODUCT RESOLUTION(Bits) NUMBEROFINPUTS
ADS124S08 24 12analoginputs
ADS124S06 24 6analoginputs
ADS114S08 16 12analoginputs
ADS114S06 16 6analoginputs
6 Pin Configuration and Functions
RHBPackage PBSPackage
32-PinVQFN 32-PinTQFP
TopView TopView
REFP1/AIN6 REFN1/AIN7 REFP0 REFN0 AVSS-SW AVSS AVDD NC REFP1/AIN6 REFN1/AIN7 REFP0 REFN0 AVSS-SW AVSS AVDD NC
32 31 30 29 28 27 26 25 32 31 30 29 28 27 26 25
AINCOM 1 24 REFCOM
AINCOM 1 24 REFCOM
AIN5 2 23 REFOUT
AIN5 2 23 REFOUT
AIN4 3 22 GPIO0/AIN8
AIN4 3 22 GPIO0/AIN8
AIN3 4 Thermal 21 GPIO1/AIN9 AIN3 4 21 GPIO1/AIN9
AIN2 5 Pad 20 GPIO2/AIN10 AIN2 5 20 GPIO2/AIN10
AIN1 6 19 GPIO3/AIN11 AIN1 6 19 GPIO3/AIN11
AIN0 7 18 RESET AIN0 7 18 RESET
START/SYNC 8 17 CLK START/SYNC 8 17 CLK
9 10 11 12 13 14 15 16
9 10 11 12 13 14 15 16
CS DIN SCLK DOUT/DRDY DRDY DGND IOVDD DVDD Not to scale CS DIN SCLK DOUT/DRDY DRDY DGND IOVDD DVDD Not to scale
NOTE: Theanaloginputfunctions(AIN6–AIN11)arenotavailableonpins19to22,31,and32fortheADS114S06.
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PinFunctions
PIN
NO. NAME FUNCTION DESCRIPTION(1)
1 AINCOM Analoginput Commonanaloginputforsingle-endedmeasurements
2 AIN5 Analoginput Analoginput5
3 AIN4 Analoginput Analoginput4
4 AIN3 Analoginput Analoginput3
5 AIN2 Analoginput Analoginput2
6 AIN1 Analoginput Analoginput1
7 AIN0 Analoginput Analoginput0
8 START/SYNC Digitalinput Startconversion
9 CS Digitalinput Chipselect;activelow
10 DIN Digitalinput Serialdatainput
11 SCLK Digitalinput Serialclockinput
12 DOUT/DRDY Digitaloutput Serialdataoutputcombinedwithdataready;activelow
13 DRDY Digitaloutput Dataready;activelow
14 DGND Digitalground Digitalground
DigitalI/Opowersupply.
15 IOVDD Digitalsupply
IncaseIOVDDisnottiedtoDVDD,connecta100-nF(orlarger)capacitortoDGND.
16 DVDD Digitalsupply Digitalcorepowersupply.Connecta100-nF(orlarger)capacitortoDGND.
17 CLK Digitalinput Externalclockinput.ConnecttoDGNDtousetheinternaloscillator.
18 RESET Digitalinput Reset;activelow
19 GPIO3/AIN11 Analoginput/output General-purposeI/O(2);analoginput11(ADS114S08only)
20 GPIO2/AIN10 Analoginput/output General-purposeI/O(2);analoginput10(ADS114S08only)
21 GPIO1/AIN9 Analoginput/output General-purposeI/O(2);analoginput9(ADS114S08only)
22 GPIO0/AIN8 Analoginput/output General-purposeI/O(2);analoginput8(ADS114S08only)
Positivevoltagereferenceoutput.
23 REFOUT Analogoutput
Connecta1-µFto47-µFcapacitortoREFCOMiftheinternalvoltagereferenceisenabled.
24 REFCOM Analogoutput Negativevoltagereferenceoutput.ConnecttoAVSS.
25 NC — LeaveunconnectedorconnecttoAVSS
26 AVDD Analogsupply Positiveanalogpowersupply.Connecta330-nF(orlarger)capacitortoAVSS.
27 AVSS Analogsupply Negativeanalogpowersupply
28 AVSS-SW Analogsupply Negativeanalogpowersupply;low-sideswitch.ConnecttoAVSS.
29 REFN0 Analoginput Negativeexternalreferenceinput0
30 REFP0 Analoginput Positiveexternalreferenceinput0
31 REFN1/AIN7 Analoginput Negativeexternalreferenceinput1;analoginput7(ADS114S08only)
32 REFP1/AIN6 Analoginput Positiveexternalreferenceinput1;analoginput6(ADS114S08only)
Pad Thermalpad — RHBpackageonly.Thermalpowerpad.ConnecttoAVSS.
(1) SeetheUnusedInputsandOutputssectionfordetailsonhowtoconnectunusedpins.
(2) General-purposeinputsandoutputsuselogiclevelsbasedontheanalogsupply.
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7 Specifications
7.1 Absolute Maximum Ratings(1)
MIN MAX UNIT
AVDDtoAVSS –0.3 5.5
AVSStoDGND –2.8 0.3
Power-supplyvoltage V
DVDDtoDGND –0.3 3.9
IOVDDtoDGND –0.3 5.5
Analoginputvoltage AINx,GPIOx,REFPx,REFNx,REFCOM AVSS–0.3 AVDD+0.3 V
CS,SCLK,DIN,DOUT/DRDY,DRDY,
Digitalinputvoltage DGND–0.3 IOVDD+0.3 V
START,RESET,CLK
Continuous,AVSS-SW,REFN0,REFOUT –100 100
Inputcurrent mA
Continuous,allotherpinsexceptpower-supplypins –10 10
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) ±2500
V Electrostaticdischarge V
(ESD) Charged-devicemodel(CDM),perJEDECspecificationJESD22-C101(2) ±1000
(1) JEDECdocumentJEP155statesthat500-VHBMallowssafemanufacturingwithastandardESDcontrolprocess.
(2) JEDECdocumentJEP157statesthat250-VCDMallowssafemanufacturingwithastandardESDcontrolprocess.
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7.3 Recommended Operating Conditions
overoperatingambienttemperaturerange(unlessotherwisenoted)
MIN NOM MAX UNIT
POWERSUPPLY
AVDDtoAVSS 2.7 5.25
Analogpowersupply AVSStoDGND –2.625 0 0.05 V
AVDDtoDGND 1.5 5.25
Digitalcorepowersupply DVDDtoDGND 2.7 3.6 V
DigitalIOpowersupply IOVDDtoDGND DVDD 5.25 V
ANALOGINPUTS(1)
PGAbypassed AVSS–0.05 AVDD+0.05
AVSS+0.15+ AVDD–0.15 –
V(AINx) Absoluteinputvoltage(2) PGAenabled,gain=1to16 |VINMAX|·(Gain–1)/2 |VINMAX|·(Gain–1)/2 V
AVSS+0.15+ AVDD–0.15–
PGAenabled,gain=32to128
15.5·|VINMAX| 15.5·|VINMAX|
VIN Differentialinputvoltage VIN=VAINP–VAINN –VREF/Gain VREF/Gain V
VOLTAGEREFERENCEINPUTS(3)
Differentialreferenceinput
VREF voltage VREF=V(REFPx)–V(REFNx) 0.5 AVDD–AVSS V
Absolutenegativereference Negativereferencebufferdisabled AVSS–0.05 V(REFPx)–0.5 V
V(REFNx) voltage Negativereferencebufferenabled AVSS V(REFPx)–0.5 V
Absolutepositivereference Positivereferencebufferdisabled V(REFNx)+0.5 AVDD+0.05 V
V(REFPx) voltage Positivereferencebufferenabled V(REFNx)+0.5 AVDD V
EXTERNALCLOCKSOURCE(4)
fCLK Externalclockfrequency 2 4.096 4.5 MHz
Dutycycle 40% 50% 60%
GENERAL-PURPOSEINPUTS(GPIOs)
Inputvoltage AVSS–0.05 AVDD+0.05 V
DIGITALINPUTS(OtherthanGPIOs)
Inputvoltage DGND IOVDD V
TEMPERATURERANGE
TA Operatingambienttemperature –50 125 °C
(1) AIN andAIN denotethepositiveandnegativeinputsofthePGA.Anyoftheavailableanaloginputs(AINx)canbeselectedaseither
P N
AIN orAIN bytheinputmultiplexer.
P N
(2) V denotesthemaximumdifferentialinputvoltage,V ,thatisexpectedintheapplication.|V |canbesmallerthanV /Gain.
INMAX IN INMAX REF
(3) REFPxandREFNxdenoteoneofthetwoavailableexternaldifferentialreferenceinputpairs.
(4) Anexternalclockisnotrequiredwhentheinternaloscillatorisused.
7.4 Thermal Information
ADS114S06,ADS114S08
THERMALMETRIC(1) VQFN(RHB) TQFP(PBS) UNIT
32PINS 32PINS
R Junction-to-ambientthermalresistance 45.2 75.5 °C/W
θJA
R Junction-to-case(top)thermalresistance 28.3 17.1 °C/W
θJC(top)
R Junction-to-boardthermalresistance 15.8 28.5 °C/W
θJB
ψ Junction-to-topcharacterizationparameter 0.4 0.4 °C/W
JT
ψ Junction-to-boardcharacterizationparameter 15.7 28.3 °C/W
JB
R Junction-to-case(bottom)thermalresistance 2.3 n/a °C/W
θJC(bot)
(1) Formoreinformationabouttraditionalandnewthermalmetrics,seetheSemiconductorandICPackageThermalMetricsapplication
report.
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7.5 Electrical Characteristics
minimumandmaximumspecificationsapplyfromT =–50°Cto+125°C;TypicalspecificationsareatT =25°C;
A A
allspecificationsareatAVDD=2.7Vto5.25V,AVSS=0V,DVDD=IOVDD=3.3V,allgains,internalreference,internal
oscillator,alldatarates,andglobalchopdisabled(unlessotherwisenoted)
PARAMETER TESTCONDITIONS MIN TYP MAX UNIT
ANALOGINPUTS
PGAbypassed,
0.5
AVSS+0.1V≤V(AINx)≤AVDD–0.1V
Absoluteinputcurrent nA
PGAenabled,allgains,
–2 0.1 2
V(AINx)MIN≤V(AINx)≤V(AINx)MAX
PGAbypassed,
2
AVSS+0.1V≤V(AINx)≤AVDD–0.1V
Absoluteinputcurrentdrift pA/°C
PGAenabled,allgains,
2
V(AINx)MIN≤V(AINx)≤V(AINx)MAX
PGAbypassed,
1 nA/V
VCM=AVDD/2,–VREF≤VIN≤VREF
Differentialinputcurrent
PGAenabled,allgains,
–1 0.02 1 nA
VCM=AVDD/2,–VREF/Gain≤VIN≤VREF/Gain
PGAbypassed,
3
VCM=AVDD/2,–VREF≤VIN≤VREF
Differentialinputcurrentdrift pA/°C
PGAenabled,allgains,
1
VCM=AVDD/2,–VREF/Gain≤VIN≤VREF/Gain
PGA
1,2,4,8,16,
Gainsettings
32,64,128
Startuptime EnablingthePGAinconversionmode 190 µs
SYSTEMPERFORMANCE
Resolution(nomissingcodes) 16 Bits
2.5,5,10,16.6,
20,50,60,100,
DR Datarate SPS
200,400,800,
1000,2000,4000
PGAbypassed,VCM=AVDD/2 1 10
INL Integralnonlinearity(bestfit) PGAenabled,gain=1to8,VCM=AVDD/2 2 15 ppmFSR
PGAenabled,gain=16to128,VCM=AVDD/2, 3 15
TA=–40°Cto+85°C
TA=25°C,PGAbypassed –120 20 120
TA=25°C,PGAenabled,gain=1to8 –120/Gain 20/Gain 120/Gain
TA=25°C,PGAenabled,gain=16to128 –15 2 15
TA=25°C,PGAbypassed,afterinternaloffset OntheorderofnoisePPatthe
calibration setDRandgain
VIO Inputoffsetvoltage µV
TA=25°C,PGAenabled,gain=1to128,after OntheorderofnoisePPatthe
internaloffsetcalibration setDRandgain
TA=25°C,PGAbypassed,globalchopenabled –2 0.2 2
TA=25°C,PGAenabled,gain=1to128, –2 0.2 2
globalchopenabled
TA=–40°Cto+85°C,PGAbypassed –75 10 75
TA=–40°Cto+85°C,PGAenabled,gain=1to128 –100 15 100
PGAbypassed –75 10 75
Offsetdrift PGAenabled,gain=1to8 –200 15 200 nV/°C
PGAenabled,gain=16to128 –150 15 150
PGAbypassed,globalchopenabled –10 2 10
PGAenabled,gain=1to128,globalchopenabled –10 2 10
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Electrical Characteristics (continued)
minimumandmaximumspecificationsapplyfromT =–50°Cto+125°C;TypicalspecificationsareatT =25°C;
A A
allspecificationsareatAVDD=2.7Vto5.25V,AVSS=0V,DVDD=IOVDD=3.3V,allgains,internalreference,internal
oscillator,alldatarates,andglobalchopdisabled(unlessotherwisenoted)
PARAMETER TESTCONDITIONS MIN TYP MAX UNIT
SYSTEMPERFORMANCE(continued)
TA=25°C,PGAbypassed 40 120
Gainerror(1) TA=25°C,PGAenabled,gain=1to32 40 120 ppm
TA=25°C,PGAenabled,gain=64and128 40 200
TA=–40°Cto+85°C,PGAbypassed 0.5 1
Gaindrift(1) TA=–40°Cto+85°C,PGAenabled,gain=1to128 0.5 2 ppm/°C
PGAbypassed 0.5 1
PGAenabled,gain=1to128 1 4
Noise(input-referred) SeetheNoisePerformancesection
fIN=50Hzor60Hz(±1Hz),DR=10SPS, 88
sinc3filter
fIN=50Hzor60Hz(±1Hz),DR=10SPS, 102
sinc3filter,externalfCLK=4.096MHz
fIN=50Hzor60Hz(±1Hz),DR=20SPS, 79
low-latencyfilter
NMRR Normal-moderejectionratio(2) floINw=-la5t0enHczyofirlt6e0r,Hexzte(±rn1aHlfzC)L,KD=R4=.02906SMPHSz, 95 dB
fIN=50Hz(±1Hz),DR=50SPS,sinc3filter 87
fIN=50Hz(±1Hz),DR=50SPS, 101
sinc3filter,externalfCLK=4.096MHz
fIN=60Hz(±1Hz),DR=60SPS,sinc3filter 89
fIN=60Hz(±1Hz),DR=60SPS, 105
sinc3filter,externalfCLK=4.096MHz
Atdc 110 120
fCM=50Hzor60Hz(±1Hz), 120 130
DR=2.5SPSto10SPS,sinc3filter
CMRR Common-moderejectionratio dB
fCM=50Hzor60Hz(±1Hz),
DR=2.5SPS,5SPS,10SPS,20SPS,low-latency 115 125
filter
AVDDatdc 90 105
PSRR Power-supplyrejectionratio AVDDat50Hzor60Hz 100 115 dB
DVDDatdc 100 115
(1) Excludingerrorofvoltagereference.
(2) Seethe50-Hzand60-HzLineCycleRejectionsectionformoreinformation.
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Electrical Characteristics (continued)
minimumandmaximumspecificationsapplyfromT =–50°Cto+125°C;TypicalspecificationsareatT =25°C;
A A
allspecificationsareatAVDD=2.7Vto5.25V,AVSS=0V,DVDD=IOVDD=3.3V,allgains,internalreference,internal
oscillator,alldatarates,andglobalchopdisabled(unlessotherwisenoted)
PARAMETER TESTCONDITIONS MIN TYP MAX UNIT
VOLTAGEREFERENCEINPUTS
Referencebuffersdisabled,externalVREF=2.5V, -6 4 6 µA/V
REFP1/REFN1inputs
Absoluteinputcurrent
Referencebuffersenabled,externalVREF=2.5V, –15 5 15 nA
REFP1/REFN1inputs
INTERNALVOLTAGEREFERENCE
VREF Outputvoltage 2.5 V
TA=25°C,TQFPpackage –0.05% ±0.01% 0.05%
Accuracy
TA=25°C,VQFNpackage –0.1% ±0.01% 0.1%
TA=–40°Cto+85°C 2.5 8
Temperaturedrift ppm/°C
TA=–50°Cto+125°C 3 10
AVDD=2.7Vto3.3V,sinkandsource –5 5
Outputcurrent mA
AVDD=3.3Vto5.25V,sinkandsource –10 10
Short-circuitcurrentlimit Sinkandsource 70 100 mA
PSRR Power-supplyrejectionratio AVDDatdc 85 dB
AVDD=2.7Vto3.3V,
8
loadcurrent=–5mAto5mA
Loadregulation µV/mA
AVDD=3.3Vto5.25V,
8
loadcurrent=–10mAto10mA
Startuptime 1-µFcapacitoronREFOUT,0.001%settling 5.9 ms
Capacitiveloadstability CapacitoronREFOUT 1 47 µF
Referencenoise f=0.1Hzto10Hz,1-µFcapacitoronREFOUT 9 µVPP
INTERNALOSCILLATOR
fCLK Frequency 4.096 MHz
Accuracy –1.5% 1.5%
EXCITATIONCURRENTSOURCES(IDACS)
10,50,100,
Currentsettings 250,500,750, µA
1000,1500,2000
10µAto750µA,0.1%deviation AVSS AVDD–0.4
Compliancevoltage(3) V
1mAto2mA,0.1%deviation AVSS AVDD–0.6
TA=25°C,10µAto100µA –5% ±0.7% 5%
Accuracy(eachIDAC)
TA=25°C,250µAto2mA –3% ±0.5% 3%
TA=25°C,10µAto100µA 0.15% 0.8%
Currentmismatchbetween
IDACs TA=25°C,250µAto750µA 0.10% 0.6%
TA=25°C,1mAto2mA 0.07% 0.4%
10µAto750µA 20 120
Temperaturedrift(eachIDAC) ppm/°C
1mAto2mA 10 80
Temperaturedriftmatching 10µAto100µA 3 25
ppm/°C
betweenIDACs 250µAto2mA 2 15
Withinternalreferencealreadysettled.Fromendof
Startuptime 22 µs
WREGcommandtocurrentflowingoutofpin.
(3) TheIDACcurrentdoesnotchangebymorethan0.1%fromthenominalvaluewhenstayingwithinthespecifiedcompliancevoltage.
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Electrical Characteristics (continued)
minimumandmaximumspecificationsapplyfromT =–50°Cto+125°C;TypicalspecificationsareatT =25°C;
A A
allspecificationsareatAVDD=2.7Vto5.25V,AVSS=0V,DVDD=IOVDD=3.3V,allgains,internalreference,internal
oscillator,alldatarates,andglobalchopdisabled(unlessotherwisenoted)
PARAMETER TESTCONDITIONS MIN TYP MAX UNIT
BIASVOLTAGE
(AVDD+AVSS)/2,
VBIAS Outputvoltagesettings (AVDD+AVSS)/12 V
Outputimpedance 350 Ω
Combinedcapacitiveloadonallselectedanalog
Startuptime 2.8 ms
inputsCLOAD=1µF,0.1%settling
BURNOUTCURRENTSOURCES(BOCS)
Currentsettings 0.2,1,10 µA
0.2µA,sinkingorsourcing ±8%
Accuracy 1µA,sinkingorsourcing ±4%
10µA,sinkingorsourcing ±2%
PGARAILDETECTION
Positiverailthreshold ReferredtotheoutputofthePGA AVDD–0.15 V
Negativerailthreshold ReferredtotheoutputofthePGA AVSS+0.15 V
REFERENCEDETECTION
Threshold1 0.3 V
Threshold2 1/3·(AVDD–AVSS) V
Threshold2accuracy –3% ±1% 3%
Pull-togetherresistance 10 MΩ
SUPPLYVOLTAGEMONITORS
(AVDD–AVSS)/4monitor ±1%
Accuracy
DVDD/4monitor ±1%
TEMPERATURESENSOR
Outputvoltage TA=25°C 129 mV
Temperaturecoefficient 403 µV/°C
LOW-SIDEPOWERSWITCH
RON On-resistance 1 3 Ω
Currentthroughswitch 75 mA
GENERAL-PURPOSEINPUT/OUTPUTS(GPIOs)
VIL Logicinputlevel,low AVSS–0.05 0.3AVDD V
VIH Logicinputlevel,high 0.7AVDD AVDD+0.05 V
VOL Logicoutputlevel,low IOL=1mA AVSS 0.2AVDD V
VOH Logicoutputlevel,high IOH=1mA 0.8AVDD AVDD V
DIGITALINPUT/OUTPUTS
VIL Logicinputlevel,low DGND 0.3IOVDD V
VIH Logicinputlevel,high 0.7IOVDD IOVDD V
VOL Logicoutputlevel,low IOL=1mA DGND 0.2IOVDD V
VOH Logicoutputlevel,high IOH=1mA 0.8IOVDD IOVDD V
Inputcurrent DGND≤VDigitalInput≤IOVDD –1 1 µA
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