745C101104JPTR

Texas Instruments

Contains all support circuitry needed for the ADS1148/ADS1248

Manufacturer: Texas Instruments

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ADS1148EVM TI1 | Alldatasheet

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PDF pages: 34

Technical content

Datasheet sections

1 EVM Overview
2 AnalogInterface
3 DigitalInterface
4 Power Supplies
5 VoltageReference
6 ClockSource
7 EVM Operation
8 ADS1248EVM-PDK KitOperation
9 EvaluatingPerformancewiththeADCPro Software
10 Schematicsand Layout
1 ReferenceSelectSwitchS1
2 Jumper J2
3 ADS1248EVM DefaultJumper Locations
4 VirtualCOM PortInstaller
5 VirtualCOM PortSetup
6 MMB3 SwitchLocations
7 ConnectingADS1248EVM toMMB3
8 MMB3 BlockDiagram
9 ADCPro SoftwareStart-upDisplayWindow
10 ADS1248EVM-PDK Plug-InDisplayWindow
11 ConnectionTimeout
12 FirmwareDownload Message Box
13 FirmwareDownload ProgressIndicator
14 FirmwareDownload CompleteMessage Box
15 ADS1248 Multiplexer
16 I/OConfigTab
17 EnablingVBIAS on a Channel
18 GPIO Tab
19 GPIO SettoOutputMode
20 GPIO OutputSettoHigh
21 Power & Ref Tab
22 CalTab
23 AboutTab
24 ProgressBar WhileCollectingData
1 J8/J4:AnalogInterfacePinout
2 J7:SerialInterfacePins
3 J11 Configuration:Power-SupplyInput
4 J10 Configuration:Power Options
5 REF1 ReferenceVoltageOptions
6 ListofSwitches
7 ADS1148EVM/ADS1248EVM BillofMaterials
2 ADS1148EVM, ADS1248EVM, ADS1148EVM-PDK, and ADS1248EVM-PDK SBAU142B –April2009–RevisedMay

User's Guide SBAU142B –April2009–RevisedMay 2011 ADS1148EVM, ADS1248EVM, ADS1148EVM-PDK, and ADS1248EVM-PDK ADS1248EVM (Left)and ADS1248EVM-PDK (Right) This user'sguide describesthe characteristics,operation,and use of the ADS1148EVM and ADS1248EVM, bothby themselvesand as partoftheADS1148EVM-PDK orADS1248EVM-PDK. These evaluationmodules (EVMs) are evaluationboardsfortheADS1248 ,a 24-bit,multi-channel,delta-sigma analog-to-digitalconverter(ADC),and theADS1148 ,a 16-bitversionoftheADS1248. ThisEVM allows evaluationofallaspectsoftheADS1148 or ADS1248 devices.Complete circuitdescriptions,schematic diagrams,and billsofmaterialareincludedinthisdocument. The followingrelateddocuments are availablefordownload throughthe Texas Instrumentsweb siteat http://www.ti.com. EVM-Compatible Device Data Sheets Device LiteratureNumber ADS1148 SBAS453 ADS1248 SBAS426A REF5020 SBOS410D OPA227 SBOS110A TPS3836L30 SLVS292D TPS79225 SLVS337B TPS72325 SLVS346B SN74LVC2G157 SCES207K PCA9535 SCPS129I ADCPro isa trademarkofTexas Instruments. Microsoft,Windows areregisteredtrademarksofMicrosoftCorporation. I2C isa trademarkofNXP Semiconductors. Allothertrademarksarethepropertyoftheirrespectiveowners. 1SBAU142B –April2009–RevisedMay 2011 ADS1148EVM, ADS1248EVM, ADS1148EVM-PDK, and ADS1248EVM-PDK SubmitDocumentationFeedback Copyright© 2009–2011,Texas InstrumentsIncorporated

www.ti.com EVM Overview

1 EVM Overview

1.1 Features

ADS1148EVM/ADS1248EVM Features:

Containsallsupportcircuitryneeded fortheADS1148/ADS1248
±2.5Vand +5V power-supplyoptionsforADC
Voltagereferenceoptions:externaloronboard
GPIO access
CompatiblewiththeTIModularEVM System ADS1148EVM-PDK/ADS1248EVM-PDK Features:
Easy-to-useevaluationsoftwareforMicrosoft® Windows ® XP
Data collectiontotextfiles
Built-inanalysistoolsincludingscope,FFT, and histogramdisplays
Completecontrolofboardsettings
Easilyexpandablewithnew analysisplug-intoolsfromTexas Instruments Foruse witha computer,theADS1148EVM-PDK orADS1248EVM-PDK isavailable.Thiskitcombines theADS1148/ADS1248EVM boardwiththeMSP430-based MMB3 motherboard,and includesADCPro ™ softwareforevaluation. The MMB3 motherboardallowstheADS1148/ADS1248EVM tobe connectedtothecomputerviaan availableUSB port.Thismanual shows how touse theMMB3 as partofthe ADS1148EVM-PDK/ADS1248EVM-PDK, butdoes notprovidetechnicaldetailsabouttheMMB3 itself. ADCPro isa programforcollecting,recording,and analyzingdatafromADC evaluationboards.Itisbased on a number ofplug-inprograms,so itcan be expanded easilywithnew testand datacollectionplug-ins. The ADS1148EVM-PDK/ADS1248EVM-PDK iscontrolledby a plug-inthatrunsinADCPro. Formore informationaboutADCPro, see theADCPro ™ Analog-to-DigitalConverterEvaluationSoftwareUser's Guide (literaturenumber SBAU128 ),availablefordownloadfromtheTIweb site. Thismanual coverstheoperationofboththeADS1148/ADS1248EVM and the ADS1148EVM-PDK/ADS1248EVM-PDK. Throughoutthisdocument,theabbreviationEVM and theterm evaluationmodule aresynonymous withtheADS1148/ADS1248EVM. Forclarityofreading,theremainder ofthismanual willreferonlytotheADS1248EVM orADS1248EVM-PDK, butoperationoftheEVM and kit fortheADS1148 isidentical,unlessotherwisenoted.

1.2 Introduction

The ADS1248EVM isan evaluationmodule builttotheTIModularEVM System specification.Itcan be connectedtoany modularEVM systeminterfacecard. The ADS1248EVM isavailableas a stand-aloneprintedcircuitboard(PCB) oras partofthe ADS1248EVM-PDK, whichincludesan MMB3 motherboardand software.As a stand-alonePCB, the ADS1248EVM isusefulforprototypingdesignsand firmware. Note thattheADS1248EVM has no microprocessorand cannotrunsoftware.To connectittoa computer, some typeofinterfaceisrequired.

2 Analog Interface

Formaximum flexibility,theADS1248EVM isdesignedforeasy interfacingtomultipleanalogsources. Samtec partnumbers SSW-110-22-F-D-VS-Kand TSM-110-01-T-DV-Pprovidea convenient10-pin, dual-row,header/socketcombinationatJ8.Thisheader/socketprovidesaccesstotheanaloginputpinsof theADS1248. ConsultSamtec athttp://www.samtec.comorcall1-800-SAMTEC-9 fora varietyofmating connectoroptions.These signalscan alsobe connectedtotheterminalblockJ4. 3SBAU142B –April2009–RevisedMay 2011 ADS1148EVM, ADS1248EVM, ADS1148EVM-PDK, and ADS1248EVM-PDK SubmitDocumentationFeedback Copyright© 2009–2011,Texas InstrumentsIncorporated

DigitalInterface www.ti.com Allofthepinson J4 and J8 areconnectedwithminimalfilteringorprotection.Use appropriatecaution when handlingthesepins.Table1 summarizesthepinoutsforanaloginterfacesJ4 and J8. Table1.J8/J4:Analog InterfacePinout Pin Number Signal Description,ADS1148/ADS1248 J8.1,J4-1 A0(–) AIN0 J8.2,J4-2 A0(+) AIN1 J8.3,J4-3 A1(–) AIN2 J8.4,J4-4 A1(+) AIN3 J8.5,J4-5 A2(–) AIN4 J8.6,J4-6 A2(+) AIN5 J8.7,J4-7 A3(–) AIN6 J8.8,J4-8 A3(+) AIN7 J8.18 REF – Externalreferencesourceinput(– sideofdifferentialinput) J8.20 REF+ Externalreferencesourceinput(+ sideofdifferentialinput) J8.10-16(even) Unused J8.15 Unused J8.9-19(odd),J4-9 AGND Analoggroundconnections (exceptJ8.15)

3 DigitalInterface

3.1 SerialData Interface

The ADS1248EVM isdesignedtoeasilyinterfacewithmultiplecontrolplatforms.Samtec partnumbers SSW-110-22-F-D-VS-Kand TSM-110-01-T-DV-Pprovidea convenient10-pin,dual-row,header/socket combinationatJ7.Thisheader/socketprovidesaccesstothedigitalcontroland serialdatapinsofthe ADC. ConsultSamtec athttp://www.samtec.comorcall1-800-SAMTEC-9 fora varietyofmating connectoroptions. Alllogiclevelson J7 are3.3VCMOS, exceptfortheI2C ™ pins.These pinsconformto3.3VI2C rules. Table2 describestheJ7 serialinterfacepins. Table2.J7:SerialInterfacePins Pin No. Pin Name SignalName I/OType Pullup Function J7.1 CNTL CS In High J7.2 GPIO0 START In High J7.3 CLKX SCLK In None ADS1248 SPI clock J7.4 DGND DGND In/Out None Digitalground J7.5 CLKR Unused – – J7.6 GPIO1 MR In High Masterreset J7.7 FSX Unused – – J7.8 GPIO2 Unused – – J7.9 FSR DRDY Out None J7.10 DGND DGND In/Out None Digitalground J7.11 DX DIN In None ADS1248 SPI datain J7.12 GPIO3 PWRSEL In High Selects±2.5Vor+5V supply J7.13 DR DOUT/DRDY Out None ADS1248 dataout J7.14 GPIO4 Unused – – J7.15 INT DRDY Out None

4 ADS1148EVM, ADS1248EVM, ADS1148EVM-PDK, and ADS1248EVM-PDK SBAU142B –April2009–RevisedMay 2011

www.ti.com Power Supplies Table2.J7:SerialInterfacePins (continued) Pin No. Pin Name SignalName I/OType Pullup Function J7.16 SCL SCL I2C High I2C clock J7.17 TOUT CLK In None Can be used toprovide a clockfroma processor J7.18 DGND DGND In/Out None Digitalground J7.19 GPIO5 CLK Select – None J7.20 SDA SDA I2C High I2C data Many pinson J7 have weak pull-upresistors.These resistorsprovidedefaultsettingsformany ofthe controlpins.Many pinson J7 corresponddirectlytoADS1248 pins.See theADS1248 productdatasheet forcompletedetailson thesepins.

4 Power Supplies

J11 isthepower-supplyinputconnector.Table3 liststheconfigurationdetailsforJ11. Table3.J11 Configuration:Power-Supply Input Pin No. Pin Name Function Required J11.1 +VA Unused No J11.2 –VA Unused No J11.3 +5VA +5V analogsupply Always J11.4 –5VA –5V analogsupply Onlyinbipolarmode J11.5 DGND Digitalgroundinput Yes J11.6 AGND Analoggroundinput Yes J11.7 +1.8VD 1.8Vdigitalsupply No J11.8 VD1 Unused No J11.9 +3.3VD 3.3Vdigitalsupply Always J11.10 +5VD +5V digitalsupply No Allofthepower supplies(AVDD, AVSS, and DVDD) have correspondingjumperson J10 thatcan be replacedwitha currentmetertomeasure therespectivesupplycurrents.

4.1 Power Options

J10 isarrangedas fiverows,each ofwhichcan be shorted.Table4 liststhepower optiondetailsforJ10. Fornormaloperation,J10.1-2,J10.3-4,and J10.5-6must be connected(directorthroughan ammeter), and either(orboth)ofJ10.7-8and J10.9-10must be connected;otherwise,theboarddoes notfunction. Table4.J10 Configuration:Power Options Row Name Function 1-2 ADC AVDD AVDD supplycurrentmeasurement pointfortheADC. Must be connectedforoperation. 3-4 ADC AVSS AVSS supplycurrentmeasurement pointfortheADC. Must be connectedforoperation. 5-6 ADC DVDD DVDD supplycurrentmeasurement pointfortheADC. Must be connectedforoperation. 7-8 DGND ConnectsDGND toboardground. 9-10 AGND ConnectsAGND toboardground. 5SBAU142B –April2009–RevisedMay 2011 ADS1148EVM, ADS1248EVM, ADS1148EVM-PDK, and ADS1248EVM-PDK SubmitDocumentationFeedback Copyright© 2009–2011,Texas InstrumentsIncorporated

VoltageReference www.ti.com

5 VoltageReference

The ADS1248 devicehas theoptionofselectingbetween threedifferentreferences:REF0, REF1, and the internalreference,throughregistersintheADS1248 chip.The EVM providesa 2.048Vreferencefor REF1 fromU1, filteredand bufferedthroughU2. This2.048Vmay be used todrivetheREF1P input. REF1P shouldnotbe connectedtoAVDD throughswitchS1 because thisconnectionwillviolatethe specificationforthemaximum referenceinput.Figure1 shows switchS1 as itappearson theEVM. The lowsideofthereference(REF1N) istiedtoAVSS.The differentreferenceoptionsunderdifferentsupply conditionsareoutlinedinTable5. Figure1.ReferenceSelectSwitch S1 Table5.REF1 ReferenceVoltageOptions REF1 S1 Position Reference AVDD AVSS J1 Setting (1) REF1P REF1N Voltage 5V 0V 1-2 BUFF 2.048V 0V 2.048V 5V 0V 2-3 BUFF 0V 0V Invalid selection 2.5V –2.5V 2-3 BUFF 0V –2.5V 2.5V (1) SwitchS1 shouldnotbe settoAVDD. The REF0N and REF0P pinsareconnecteddirectlytotheexternalreferencepinson J8.18and J8.20, respectively.These pinsarediode-clampedtoAVDD and AVSS, and protectedwithD3, a 5.1Vzener.If theexternalreferencepinsarenotsuppliedwitha externalsource,REF0N willbe atapproximatelyAVSS + 0.6V,and REF0P willbe atapproximatelyAVDD –0.6V. The internalreferencevoltagecan be measured between testpointsTP3 (IntREF) and TP5 (REFCOM).

6 Clock Source

The ADS1248 has an internalclockorcan be providedan externalclock.The EVM uses theinternalclock mode only.Provisionismade on theEVM circuitboard,however,foran externalclocksource.A footprint isprovidedatU8 fora crystaloscillatortobe mounted on theboard.An externalclockmay alsobe providedby a processoron theTOUT pin(J7.17),oran externalclocksourceconnectedtoJ14.1(ground) and J14.2(signal). J2 controlshow theclocksourceisselected.WithpinsJ2.1and J2.2shorted,GPIO5 fromJ7.19can controlwhethertheA orB sideofU7 isselected.IftheA sideisselected,theclockshouldcome froman externalsourceprovidedas describedabove.IftheB sideisselected,theclockshouldcome fromthe crystaloscillator.Ifa selectionismade and no clockisprovidedon thatinput,theADS1248 detectsthat no externalclockispresentand enablesitsinternaloscillator.

6.1 Usage inPDK

IfusingtheADS1248EVM as partoftheADS1248EVM-PDK, J14 shouldhave a jumperinstalled. Remove any shortingblockson jumperJ13,and make sureJ2 has a jumperbetween pins1 and 2 (theIO position).ThisconfigurationgroundstheCLK inputtotheADS1248 and ensuresthattheinternaloscillator startsup.

6 ADS1148EVM, ADS1248EVM, ADS1148EVM-PDK, and ADS1248EVM-PDK SBAU142B –April2009–RevisedMay 2011

www.ti.com EVM Operation

6.2 Usage as a Stand-AloneEVM

IfusingtheEVM inyourown systemand notwiththePDK hardwareand software,observethefollowing recommendations:

J13 shouldbe removed iftheexternalclocksourceisused and theTOUT pinisstilldrivenby a processorinordertoavoidconflicts.
Jumper J2 can be used toalwaysselecttheU8 oscillator(DVDD position)orallowthe onboard/externalclockselectiontobe controlledby GPIO5 (J7.19)as shown inFigure2. Figure2.Jumper J2

7 EVM Operation

Thissectionprovidesinformationon theanaloginput,digitalcontrol,and generaloperatingconditionsof theADS1248EVM.

7.1 Analog Input

Each oftheanaloginputsourcescan be applieddirectlytoJ8 (toporbottomside)orthrough signal-conditioningmodules availableforthethemodularEVM system.TerminalblockJ4 isconnectedin parallelwiththeanalogsignalconnectionstoJ8.Each inputhas a 47Ω/47pFRC filterinserieswithit,and a differential0.1μF capacitorisplacedacrosseach inputpairforuse withdifferentialsignals.

7.2 DigitalControl

The digitalcontrolsignalscan be applieddirectlytoJ7 (toporbottomside).The modularADS1248EVM can alsobe connecteddirectlytoa DSP ormicrocontrollerinterfaceboard,such as the5-6K Interfaceor HPA-MCU InterfaceboardsavailablefromTexas Instruments,ortheMMB3 ifpurchasedas partofthe ADS1248EVM-PDK. Fora listofcompatibleinterfaceand/oraccessoryboardsfortheEVM orthe ADS1248, see therelevantproductfolderon theTIweb site. 7SBAU142B –April2009–RevisedMay 2011 ADS1148EVM, ADS1248EVM, ADS1148EVM-PDK, and ADS1248EVM-PDK SubmitDocumentationFeedback Copyright© 2009–2011,Texas InstrumentsIncorporated

ADS1248EVM-PDK KitOperation www.ti.com

7.3 DefaultJumper Settingsand Switch Positions

Figure3 shows thejumpersfoundon theEVM and therespectivefactorydefaultconditionsforeach. Figure3.ADS1248EVM DefaultJumper Locations Table6 liststheswitchesfoundon theEVM and therespectivefactorydefaultconditionsforeach. Table6.ListofSwitches Switch DefaultPosition Switch Description S1 Left Onboard reference

8 ADS1248EVM-PDK KitOperation

Thissectionprovidesinformationon usingtheADS1248EVM-PDK, includingsetup,programinstallation, and programusage. To preparetoevaluatetheADS1248 withtheADS1248EVM-PDK, completethefollowingsteps: Step1. InstalltheADCPro software(ifnotalreadyinstalled)on a PC. Step2. InstalltheADS1248EVM-PDK EVM plug-insoftware. Step3. CompletetheUSB driverinstallationprocess. Step4. Setup theADS1248EVM-PDK. Step5. ConnecttheADS1248EVM-PDK tothecomputerwitha USB cable. Step6. Run theADCPro software. Each taskisdescribedinthesubsequentsectionsofthisdocument.

8 ADS1148EVM, ADS1248EVM, ADS1148EVM-PDK, and ADS1248EVM-PDK SBAU142B –April2009–RevisedMay 2011

www.ti.com ADS1248EVM-PDK KitOperation

8.1 InstallingtheADCPro Software

Do not connect the ADS1248EVM-PDK beforeinstallingthe softwareon a suitablePC. Failureto observethiscautionmay cause MicrosoftWindows to notrecognizetheADS1248EVM-PDK as a connecteddevice. The CD-ROM shippedwiththeADS1248EVM containsan installerforADCPro as wellas an installerfor theADS1248EVM plug-in.The latestsoftwareisavailablefromtheTIwebsiteathttp://www.ti.com/.Refer totheADCPro User Guide forinstructionson installingand usingADCPro. versionnumber,and incrementswithsoftwareversionreleases;you may have a differentversionon your CD).Double-clickthefiletorunit;thenfollowtheinstructionsshown.You can alsoutilizetheADCPro Update Check featuretocheckfornewer versionsoftheADS1248EVM-PDK plug-in,once you have installeda versionofit. Followtheon-screenprompts.Once theADCPro plug-ininstalls,you willbe promptedtoinstalltheVirtual COM portdriveras shown inFigure4. Figure4.VirtualCOM PortInstaller PressOK ,and thescreenshown inFigure5 isdisplayed. Figure5.VirtualCOM PortSetup Ifyou alreadyhave a TUSB3410 VirtualCOM portdriverinstalledon yoursystem,selectCancel; otherwise,pressSetupand followtheon-screenprompts.You may be notifiedthatthedriverisnot digitallysigned.Ifthismessage appears,selectContinueAnyway and proceed. 9SBAU142B –April2009–RevisedMay 2011 ADS1148EVM, ADS1248EVM, ADS1148EVM-PDK, and ADS1248EVM-PDK SubmitDocumentationFeedback Copyright© 2009–2011,Texas InstrumentsIncorporated

ADS1248EVM-PDK KitOperation www.ti.com

8.2 SettingUp theADS1248EVM-PDK

The ADS1248EVM-PDK containsboththeADS1248EVM and theMMB3 motherboard;however,the devicesareshippedunconnected.Followthesestepstosetup theADS1248EVM-PDK. Step1. Unpack theADS1248EVM-PDK kit. Step2. Settheswitcheson theMMB3 as describedbelow,as shown inFigure6.

SetswitchSW4 totheright.
SettheDAC switch(SW5) totheOUT position(totheright). Figure6.MMB3 Switch Locations Step3. PlugtheADS1248EVM intotheMMB3 as Figure7 illustrates.

10 ADS1148EVM, ADS1248EVM, ADS1148EVM-PDK, and ADS1248EVM-PDK SBAU142B –April2009–RevisedMay 2011

www.ti.com ADS1248EVM-PDK KitOperation Figure7.Connecting ADS1248EVM toMMB3 CAUTION Do not misalignthe pinswhen pluggingthe ADS1248EVM intothe MMB3. Check thepinalignmentcarefullybeforeapplyingpower tothePDK. Step4. Setthejumpersand switcheson theADS1248EVM as shown inFigure3 (notethatthese settingsarethefactory-configuredsettingsfortheEVM).

8.2.1 About theMMB3

The MMB3 isa ModularEVM System motherboard.ItisdesignedaroundtheMSP430F449 ,a low-power microcontrollerfromTexas Instruments.Figure8 shows a blockdiagramoftheMMB3. 11SBAU142B –April2009–RevisedMay 2011 ADS1148EVM, ADS1248EVM, ADS1148EVM-PDK, and ADS1248EVM-PDK SubmitDocumentationFeedback Copyright© 2009–2011,Texas InstrumentsIncorporated

+5VA /c455VA +5VD +3.3V +1.8V +10V /c4510V PWR□&□VREF USB USB RESET DAC1220 TUSB3410 MSP430F449 /c451 DAC IN OUT Analog Daughtercard Modular Connectors Power Power□from PWR□&□VREF□Block Serial Joystick RESET OPER LCD□DISPLAY BSL 2.5V Supplied□to Daughtercard Power□Connector ADS1248EVM-PDK KitOperation www.ti.com Figure8.MMB3 Block Diagram The MMB3 was designedtobe used as a stand-alonedemonstrationplatformforlow-speeddata converters.Itfeaturesan onboard,20-bitdigital-to-analogconverter(DAC) thatcan be used as a signal sourceforan ADC undertest,and has a joystickforcontroloffunctionson theboardwhen itisnot controlledby a PC. These featuresareexperimentaland not supported intheADS1248EVM-PDK at thistime. The MMB3 derivespower fromtheUSB interface,and generates+5VD, 3.3V,and 1.8V,as wellas +5VA and –5VA and ±10V.The ±10V issuppliedtothedaughtercardpower connectoras +VA and –VA. The MMB3 isnotsoldas a microcontrollerdevelopmentboard,and itisnotavailableseparately.TIcannot offersupportfortheMMB3 exceptas partofan EVM kit.Forschematicsorotherinformationaboutthe MMB3, contactTexas Instruments.

8.3 EVM Power Supply

The ADS1248EVM-PDK ispowered completelyfromtheUSB connectionon theMMB3. The MMB3 provides3.3Vand ±5V totheADS1248EVM.

8.4 Running theSoftwareand Download ofFirmware toMMB3

NOTE: The softwareiscontinuallyunderdevelopment.These instructionsand screenimages are currentatthetimeofthiswriting,butmay notexactlymatch futurereleases. The programforevaluatingtheADS1248EVM-PDK iscalledADCPro .Thisprogramuses plug-insto communicatewiththeEVM. The ADS1248EVM-PDK plug-inisincludedintheADS1248EVM-PDK package.

12 ADS1148EVM, ADS1248EVM, ADS1148EVM-PDK, and ADS1248EVM-PDK SBAU142B –April2009–RevisedMay 2011

www.ti.com ADS1248EVM-PDK KitOperation The programcurrentlyrunsonlyon MicrosoftWindows platformsofWindows XP; Windows VistaisNOT supported. IfthisisthefirsttimeinstallingADCPro and plug-ins,followtheseprocedurestorunADCPro and perform any necessaryfirmwareinstallations.Make suretheADCPro softwareand deviceplug-insoftwareare installedfromtheCD-ROM as describedinSection8.1,InstallingtheADCPro Software. Step1. Startthesoftwareby selectingADCPro fromtheWindows Startmenu. The screeninFigure9 appears. Figure9.ADCPro SoftwareStart-upDisplayWindow 13SBAU142B –April2009–RevisedMay 2011 ADS1148EVM, ADS1248EVM, ADS1148EVM-PDK, and ADS1248EVM-PDK SubmitDocumentationFeedback Copyright© 2009–2011,Texas InstrumentsIncorporated

ADS1248EVM-PDK KitOperation www.ti.com break Step2. SelectADS1248EVM fromtheEVM drop-downmenu. The ADS1248EVM-PDK plug-in appearsintheleftpane,as shown inFigure10. Figure10.ADS1248EVM-PDK Plug-InDisplayWindow Step3. The ADS1248EVM-PDK plug-inwindow has a statusareaatthetopofthescreen.When the plug-inisfirstloaded,theplug-insearchesfortheboard.You willsee a seriesofmessages inthestatusareaindicatingthisaction.

14 ADS1148EVM, ADS1248EVM, ADS1148EVM-PDK, and ADS1248EVM-PDK SBAU142B –April2009–RevisedMay 2011

www.ti.com ADS1248EVM-PDK KitOperation break Step4. Iftheplug-incannotconnecttotheEVM, you willsee a window as shown inFigure11.This message may indicatethatthefirmwareisnotloadedon theMMB3. You may selectRetry AutoConnect;ifthatactionfails,selectRetryManual Connectand specifytheCOM portto be used. Figure11.Connection Timeout Step5. The plug-indetectswhetherornottheboardhas thecorrectfirmwareloaded.The firsttime you use theADS1248EVM-PDK, thefirmwarefortheMMB3 may need tobe downloadedto theMMB3. Ifthefirmwareneeds tobe loaded,you willsee a screenas shown inFigure12. Figure12.Firmware Download Message Box 15SBAU142B –April2009–RevisedMay 2011 ADS1148EVM, ADS1248EVM, ADS1148EVM-PDK, and ADS1248EVM-PDK SubmitDocumentationFeedback Copyright© 2009–2011,Texas InstrumentsIncorporated

ADS1248EVM-PDK KitOperation www.ti.com SwitchtheBSL switch(SW4) on theMMB3 totheBSL position(totheleft)as instructed,thenpress OK .The plug-inwilldownloadthefirmwaretotheMMB3. Thisoperationmay takea coupleofminutes, so theprogressisupdatedinthemessage atthetopoftheADS1248 plug-inwindow (asFigure13 shows).The firmwareissaved inflashmemory on theMMB3, so thisoperationshouldonlyneed tobe performedonce. Figure13.Firmware Download Progress Indicator

16 ADS1148EVM, ADS1248EVM, ADS1148EVM-PDK, and ADS1248EVM-PDK SBAU142B –April2009–RevisedMay 2011

www.ti.com EvaluatingPerformancewiththeADCPro Software When thefirmwaredownloadcompletes,themessage box shown inFigure14 appears.Followthe on-screeninstructionsand theplug-inshouldnow connecttotheEVM. Figure14.Firmware Download Complete Message Box

9 EvaluatingPerformance withtheADCPro Software

The evaluationsoftwareisbased on ADCPro, a programthatoperatesusinga varietyofplug-ins.To use ADCPro, loadan EVM plug-inand a testplug-in.To loadan EVM plug-in,selectitfromtheEVM menu. To loada testplug-in,selectitfromtheTestmenu. To unloada plug-in,selecttheUnloadoptionfromthe correspondingmenu. Onlyone ofeach kindofplug-incan be loadedata time.Ifyou selecta differentplug-in,theprevious plug-inisunloaded.

9.1 Using theADS1248EVM-PDK Plug-in

The ADS1248EVM-PDK plug-inforADCPro providescompletecontroloverallsettingsoftheADS1248. It consistsofa tabbedinterface(seeFigure16),withdifferentfunctionsavailableon differenttabs.These controlsaredescribedinthissection. You can adjusttheADS1248EVM settingswhen you arenotacquiringdata.Duringacquisition,all controlsaredisabledand settingsmay notbe changed. When you change a settingon theADS1248EVM plug-in,thesettingimmediatelyupdateson theboard. Settingson theADS1248EVM correspondtosettingsdescribedintheADS1248 datasheet(availablefor downloadatwww.ti.com)fordetails. The ADS1248EVM-PDK plug-inhas a tabbedinterface,withfivedifferenttabstocontrolthefunctionsof theADS1248. These tabsaredescribedbelow. 17SBAU142B –April2009–RevisedMay 2011 ADS1148EVM, ADS1248EVM, ADS1148EVM-PDK, and ADS1248EVM-PDK SubmitDocumentationFeedback Copyright© 2009–2011,Texas InstrumentsIncorporated

(MUXCAL□=□001) System□Monitors T emperature DiodeVREFP VREFN VREFP1/4 VREFN1/4 VREFP0/4 VREFN0/4 AVDD/4 AVSS/4 DVDD/4 DVSS/4 ADS1248□Only ADS1247/48□Only VBIAS AIN0 AIN1 VBIAS AIN2 VBIAS AIN3 VBIAS AIN4 VBIAS AIN5 VBIAS AIN6 VBIAS AIN7 AVDD IDAC1IDAC2 AVDD VBIAS PGA AINP AVSS AVDD Burnout□Current□Source Burnout□Current□Source AIN N T o ADC AVSS AVSS AVSS AVSS AVSS AVSS AVSS AVSS AVDD AVDD AVDD AVDD AVDD AVDD AVDD AVDD AVDD AVDD EvaluatingPerformancewiththeADCPro Software www.ti.com

9.1.1 I/OConfigTab

ThistabistheprimarytabthatcontrolsthefunctionofthemultiplexerintheADS1248. Recallthatthe ADS1248 multiplexerisconfiguredas shown inFigure15.By default,allchannelsaresetas analog inputs;theIDACs arenotroutedtoany channeland theIDAC controlsaredisabled.These controlsare enabledwhen thecorrectIDAC settingsaremade on thePower & Ref tab(seeSection9.1.3). Figure15.ADS1248 Multiplexer The radiobuttonsatthefarrightofthepanel(seeFigure16)selectwhichpairofinputsareconnectedto thePGA. Note thatyou may selectthesame inputforboththepositive(AINP )and negative(AINN )input; thisconfigurationisoftenselectedtoperforma noiseteston theADC itself.

18 ADS1148EVM, ADS1248EVM, ADS1148EVM-PDK, and ADS1248EVM-PDK SBAU142B –April2009–RevisedMay 2011

www.ti.com EvaluatingPerformancewiththeADCPro Software InputpinsAIN2-AIN7 can be selectedtobe an analoginputorGPIO. Ifan inputistobe used as a GPIO, checktheGPIO box as shown inFigure16. Figure16.I/OConfigTab When an inputisselectedas a GPIO, itslabelturnsgreenand theIDAC controlsforthatchannelare disabled. 19SBAU142B –April2009–RevisedMay 2011 ADS1148EVM, ADS1248EVM, ADS1148EVM-PDK, and ADS1248EVM-PDK SubmitDocumentationFeedback Copyright© 2009–2011,Texas InstrumentsIncorporated

EvaluatingPerformancewiththeADCPro Software www.ti.com Each inputchannelcan alsohave a VBIAS appliedtoit.CheckingtheVBIAS box on a channelapplies theVBIAS voltage,whichisapproximatelyhalfthevalueofthesupply.You can testthisoptionas shown inFigure17,usingone channeltiedtoa valueclosetoground(make sureyou observethe common-mode restrictionslistedintheADS1248 productdatasheet)as a referenceforthissignal. Figure17.EnablingVBIAS on a Channel The System Monitorbuttonallowsyou toaccesstheinternalsystemmonitorchannelsoftheADS1248. When pressed,thisbuttondisablestheotheranaloginputchannelcontrols,and thesystemmonitor channelselectionsareenabled.You can selectOffset,Gain,Temperature,VREF1 ,VREF0 ,AVDD ,or DVDD as thechanneltoconvert.Note thatsome ofthesechannelsarescaledby a factorwhen read; refertotheADS1248 productdatasheettodeterminethesefactors. The PGA Gain controlsetsthePGA gain,and theData Rate controlsetsthedatarateforthedevice. Note thatthedataratecan go quitelow;therefore,iftheblocksizeislarge,thetimeittakestocollecta blockofdatacan be quitelong.Itisadvisabletofirsttestcollectionatthehigherdatarates.Once a testis known towork properly,droptoa lowerdatarateand allowsufficienttimetocollectthedata. The BCS controlsetsthecurrentleveloftheburnoutcurrentsources;itmay be settoOff,orto0.5μA, 2μA,or10μA. The Power Down controlpowers down theADS1248. Note thatno datacan be collectedifthePower Down buttonisactivated.

20 ADS1148EVM, ADS1248EVM, ADS1148EVM-PDK, and ADS1248EVM-PDK SBAU142B –April2009–RevisedMay 2011

www.ti.com EvaluatingPerformancewiththeADCPro Software

9.1.2 GPIO Tab

When an inputisselectedtobe a GPIO, itscontrolsareenabledon theGPIO tab,shown inFigure18.By default,theGPIOs areenabledas inputs.PressingtheInputbuttonreadsthestateoftheenabledinputs; iftheinputishigh,thecorrespondinglightturnsgreen. Figure18.GPIO Tab 21SBAU142B –April2009–RevisedMay 2011 ADS1148EVM, ADS1248EVM, ADS1148EVM-PDK, and ADS1248EVM-PDK SubmitDocumentationFeedback Copyright© 2009–2011,Texas InstrumentsIncorporated

EvaluatingPerformancewiththeADCPro Software www.ti.com To make theGPIO an output,thetoggleswitchcan be switchedtooutputmode, as shown inFigure19. Figure19.GPIO Set toOutput Mode

22 ADS1148EVM, ADS1248EVM, ADS1148EVM-PDK, and ADS1248EVM-PDK SBAU142B –April2009–RevisedMay 2011

www.ti.com EvaluatingPerformancewiththeADCPro Software WiththeGPIO configuredas an output,thepushbuttonswitchcontrolsthestateoftheoutputpin.When pressed(asillustratedinFigure20),thebuttonlightsup and theGPIO issettoa highstate;when the switchisdark(asFigure19 shows),theGPIO isina lowstate. Figure20.GPIO Output Set toHigh 23SBAU142B –April2009–RevisedMay 2011 ADS1148EVM, ADS1248EVM, ADS1148EVM-PDK, and ADS1248EVM-PDK SubmitDocumentationFeedback Copyright© 2009–2011,Texas InstrumentsIncorporated

EvaluatingPerformancewiththeADCPro Software www.ti.com

9.1.3 Power & Ref Tab

The Power & Ref tabisshown inFigure21.Thistabcontrolstheselectionofthepower-supplymode, referencesources,and IDACs. Figure21.Power & Ref Tab Note thatwiththeInternalReferenceoff,theIDAC controlsaredisabled,because theIDACs cannotbe used unlesstheinternalreferenceisturnedon.

24 ADS1148EVM, ADS1248EVM, ADS1148EVM-PDK, and ADS1248EVM-PDK SBAU142B –April2009–RevisedMay 2011

www.ti.com EvaluatingPerformancewiththeADCPro Software The Power Supply controlselectsbetween singlesupply(+5V)mode and bipolarsupply(±2.5V)mode. The EVM draws itssupplyvoltagesfromtheMMB3 motherboard,and has onboardcircuitrytoselect between the+5V and bipolarsupplies. The ReferenceSelectcontrolselectsbetween VREF0 ,VREF1 ,and theInternalReference.When VREF1 isselected,theVREF valueissetto2.048V,withswitchS1 settoBUFF. S1 shouldnotbe setto theAVDD position,inordertopreventthereferencefromexceedingthemaximum specifiedinput. Therearetwo checkboxesthat,when enabled,allowtheREF0P and REF0N pinstobe selectedas GPIOs. These checkboxesareenabledonlyinmodes thatallowthesepinstobe used as GPIOs. The InternalReferencecontrolselectswhetherthereferenceisoff,on,orfollowstheSTART signal(refer totheADS1248 datasheetformore detailson thesechoices).When theinternalreferenceisenabled,the IDAC controlsareenabledas well,because theIDACs cannotfunctionunlesstheinternalreferenceis turnedon.Note thattheinternalreferencedoes notnecessarilyhave tobe used as theADC referencein ordertouse theIDACs,butitdoes need tobe turnedon. The IDAC Magnitude controlsetstheamount ofcurrenteach ofthetwo IDACs provide. The IDAC0 and IDAC 1 Routing controlsallowyou tospecifywhere theIDAC0 orIDAC1 currentgo:to eithertheIEXC1 orIEXC2 pins,ortotheAnaloginputs,oryou may turntheIDAC off.IftheAIN buttonis selected,thisoptionenablesthecorrespondingIDAC controlson theI/OConfigtab. 25SBAU142B –April2009–RevisedMay 2011 ADS1148EVM, ADS1248EVM, ADS1148EVM-PDK, and ADS1248EVM-PDK SubmitDocumentationFeedback Copyright© 2009–2011,Texas InstrumentsIncorporated

EvaluatingPerformancewiththeADCPro Software www.ti.com

9.1.4 Cal Tab

The Caltab(Figure22)controlsthecalibrationfunctionsoftheADS1248. Figure22.Cal Tab PressingtheSelfOffsetCalibratebuttoncausestheADS1248 toperforma selfcalibration;theoffset and full-scaleregistervaluesarethenupdatedon theplug-inscreen.You may alsowritetothese registersby typinginhex valuesintheNew fields,thenpresstheSet button.You may readthevaluesat any timeby pressingtheRead button.

26 ADS1148EVM, ADS1248EVM, ADS1148EVM-PDK, and ADS1248EVM-PDK SBAU142B –April2009–RevisedMay 2011

www.ti.com EvaluatingPerformancewiththeADCPro Software

9.1.5 About Tab

The AbouttabdisplaysinformationabouttheEVM and software,as shown inFigure23. Figure23.About Tab The PluginVersionand Firmware Versionindicatorsshow theversionnumbers oftheplug-inand firmwarecode,respectively. The ID indicatorshows thevalueoftheID [3:0]bitsintheADS1248 ID register. The Notes indicatormay show relevantnotesabouttheplug-inorfirmwarecode,ifthereareany. 27SBAU142B –April2009–RevisedMay 2011 ADS1148EVM, ADS1248EVM, ADS1148EVM-PDK, and ADS1248EVM-PDK SubmitDocumentationFeedback Copyright© 2009–2011,Texas InstrumentsIncorporated

EvaluatingPerformancewiththeADCPro Software www.ti.com

9.1.6 CollectingData

Once you have configuredtheADS1248 foryourtestscenario,presstheADCPro Acquirebuttontostart thecollectionofthenumber ofdatapointsspecifiedintheTestplug-inBlockSizecontrol.The ADS1248EVM-PDK plug-indisablesallthefrontpanelcontrolswhileacquiring,and displaysa progress baras shown inFigure24. Figure24.Progress Bar While CollectingData Formore informationon testinganalog-to-digitalconvertersingeneraland usingADCPro and test plug-ins,refertotheADCPro User Guide.

28 ADS1148EVM, ADS1248EVM, ADS1148EVM-PDK, and ADS1248EVM-PDK SBAU142B –April2009–RevisedMay 2011

www.ti.com Schematicsand Layout

9.2 Troubleshooting

IftheADS1248EVM plug-incannotfindtheADS1248EVM-PDK, presstheUSB RESET buttonon the MMB3 (refertoFigure6)and tryagain. IfADCPro stopsrespondingwhiletheADS1248EVM-PDK isconnected,tryunpluggingtheUSB cable fromthePDK. Unloadand reloadtheplug-inbeforereapplyingpower tothePDK.

10 Schematics and Layout

SchematicsfortheADS1148EVM and ADS1248EVM areappended tothisuser'sguide.The billof materialsisprovidedinTable7.

10.1 BillofMaterials

NOTE: Allcomponents shouldbe compliantwiththeEuropean UnionRestrictionon Use of HazardousSubstances(RoHS) Directive.Some partnumbers may be eitherleadedor RoHS. Verifythatpurchasedcomponents areRoHS-compliant.(Formore informationabout TI'spositionon RoHS compliance,see theQualityand Eco-Infoinformationon theTIweb site.) Table7.ADS1148EVM/ADS1248EVM BillofMaterials ItemNo. Qty Value Ref Des Description Vendor PartNumber 1 1 N/A ADS1248 EVM PWB Texas 6496961 Instruments 2 4 1μF C1-C3,C33 Capacitor,X7R Ceramic1μF ±10%, 16WV, TDK C1608X7R1C105KT Size= 0603 3 2 22μF C4, C5 Capacitor,X5R Ceramic22μF ±20%, TDK C3225X5R1C226MT 16WV, Size= 1210 4 12 0.1μF C6-C13,C15, C34, Capacitor,X7R Ceramic0.1μF ±10%, TDK C1608X7R1E104KT C35, C36 25WV, Size= 0603 5 1 0.15μF C14 Capacitor,X7R Ceramic0.15μF ±10%, Murata GRM188R71C154KA 16WV, Size= 0603 01D 6 8 10μF C16-C23 Capacitor,X5R Ceramic10μF ±20%, TDK C2012X5R0J106MT 6.3WV, Size= 0805 7 8 47pF C24-C31 Capacitor,C0G Ceramic47pF ±5%, 50WV, TDK C1608C0G1H470JT Size= 0603 8 1 10nF C32 Capacitor,C0G Ceramic10nF ±5%, 25WV, TDK C1608C0G1E103JT Size= 0603 9 4 D1, D2, D5, D6 DIODE SCHOTTKY 30V 200MA SOT-23 Fairchild BAT54 10 2 D3, D4 5.1V,ZenerDiode On MMBZ5231BLT1G Semiconductor 11 2 J1,J2 Header Strip,3-pin() Samtec TSW-103-07-L-S 12 1 J4 TerminalBlock,9-position On Shore ED555/9DS Technology 13 4 J5,J6,J13,J14 Header Strip,2-pin() Samtec TSW-102-07-L-S 14 2 J7A,J8A 20-pinSMT Plug Samtec TSM-110-01-L-DV-P 15 2 J7B,J8B 20-pinSMT Socket Samtec SSW-110-22-F-D-VS- K 16 1 J9 TerminalBlock,3 position On Shore ED555/3DS Technology 17 1 J10 Header Strip,10-pin() Samtec TSW-105-07-L-D 18 1 J11A 10-pinSMT Plug Samtec TSM-105-01-L-DV-P 19 1 J11B 10-pinSMT Socket Samtec SSW-105-22-F-D-VS- K 20 0 J12 Header Strip,6-pin() 21 2 Q1, Q2 MOSFET, P-Channel,2.5V Fairchild FDN302P 22 1 Q3 Enhancement Mode FET, N-Channel Fairchild FDN337N 23 1 100kΩ RA1 Resistor,8 ThickFilmChipArray100kΩ, CTS 745C101104JPTR 5%, 63mW 29SBAU142B –April2009–RevisedMay 2011 ADS1148EVM, ADS1248EVM, ADS1148EVM-PDK, and ADS1248EVM-PDK SubmitDocumentationFeedback Copyright© 2009–2011,Texas InstrumentsIncorporated

RevisionHistory www.ti.com Table7.ADS1148EVM/ADS1248EVM BillofMaterials(continued) ItemNo. Qty Value Ref Des Description Vendor PartNumber 24 0 RA2 Resistor,ChipArray4 IndependentBus 100kΩ,5%, 1/16W,SMD 25 1 10kΩ R1 Resistor,ThickFilmChip10kΩ,5%, 1/10W, Panasonic ERJ-3GEYJ103V Size= 0603 26 1 2kΩ R2 Resistor,ThickFilmChip2kΩ,1%, 1/16W, Panasonic ERJ-3EKF2001V Size= 0603 27 10 47Ω R3-R12 Resistor,ThickFilmChip47Ω,5%, 1/10W, Panasonic ERJ-3GEYJ470V Size= 0603 28 2 100kΩ R13, R23 Resistor,ThickFilmChip100kΩ,5%, Panasonic ERJ-3GEYJ104V 1/10W,Size= 0603 29 4 0Ω R14, R15, R16, R17 Resistor,ThickFilmChip0Ω,5%, 1/10W, Panasonic ERJ-3GEY0R00V Size= 0603 30 1 47kΩ R18 Resistor,ThickFilmChip47kΩ,5%, 1/10W, Panasonic ERJ-3GEYJ473V Size= 0603 31 2 470kΩ R19, R20 Resistor,ThickFilmChip470kΩ,5%, Panasonic ERJ-3GEYJ474V 1/10W,Size= 0603 32 2 100Ω R21, R22 Resistor,ThickFilmChip100Ω,5%, 1/10W, Panasonic ERJ-3GEYJ101V Size= 0603 33 2 2.7kΩ R24, R25 Resistor,ThickFilmChip2.7kΩ,5%, Panasonic ERJ-3GEYJ272V 1/10W,Size= 0603 34 1 S1 Switch,MiniSlide,SPDT NKK SS12SDP2 35 0 TP1-TP5 PCB TestPoint,MiniLoop,Through-Hole 36 1 TP6 PCB TestPoint,LargeLoop,Through-Hole Keystone 5011 Electronics 37 1 U1 PrecisionVoltageReference,2.048V Texas REF5020ID Instruments 38 1 U2 PrecisionOperationalAmplifier Texas OPA227U Instruments 39 1 U3 Texas PCA9535RGE16-BitI2C I/OExpander Instruments 40 1 U4 Inverter,SingleGate Texas SN74AHCT1G04DBV Instruments R 41 1 U5 Buffer,Open Drain,SingleGate Texas SN74LVC1G07DBVR Instruments G4 42 1 U6 LDO VoltageRegulator,2.5V,100mA Texas TPS79225DBVRG4 Instruments 43 1 U7 Single,2-Lineto1 Data Selector/Multiplexer Texas SN74LVC2G157DCT Instruments 44 0 U8 3.3V Oscillator 45 1 U9 LDO VoltageRegulator,2.5V,200mA Texas TPS72325DBVTG4 Instruments 46 1 U10 PrecisionDelta-SigmaADC, 24-bit/16-bit Texas ADS1248IPW/ADS11 Instruments 48IPW 47 1 U11 EEPROM, 1.8V,256k Microchip 24AA256-I/ST 48 1 U12 Supervisor,2.64VThreshold Texas TPS3836L30DBVT Instruments 49 10 N/A ShortingBlocks Samtec SNT-100-BK-T RevisionHistory NOTE: Page numbers forpreviousrevisionsmay differfrompage numbers inthecurrentversion.

30 RevisionHistory SBAU142B –April2009–RevisedMay 2011

A B C D 654321 D C B A ti

5411 EAST WILLIAMS BOULEVARD, TUCSON, AZ 85711 USA

REVISION HISTORY

REV ENGINEERING CHANGE NUMBER APPROVED B PRECISION ANALOG PRODUCTS HIGH-PERFORMANCE ANALOG DIVISION SEMICONDUCTOR GROUP DOCUMENT CONTROL NO. +5V -5V +5V C14 150nF C15 0.1uF 0.1uF 1uF 10K JPR-1X3 22uF GND TP6 GND CNTL1 CLKX3 CLKR5 FSX7 FSR9 DX11 DR13 INT15 TOUT17 GPIO519 GPIO0 2 DGND 4 GPIO1 6 GPIO2 8 DGND 10 GPIO3 12 GPIO4 14 SCL 16 DGND 18 SDA 20 SERIALHDR OBCLK EOH1 GND 2OUT3 VCC 4 CRY_C3391-4.096 DVDD C32 10nF C0G A 1 B 2Y3 GND 4 Y5 A/B 6 VCC8 SN74LVC2G157DCT R20 470K R18 47K R19 470K TOUT GPIO5 J7A (TOP) = SAM_TSM-110-01-L-DV-P J7B (BOTTOM) = SAM_SSW-110-22-F-D-VS DVDD P001 P012 P023 P034 P045 P056 P067 P078 GND9 P1010 P1111 P1212 P13 13 P14 14 P15 15 P16 16 P17 17 A0 18 SCL 19SDA 20VCC 21INT 22A1 23A2 24 PCA9535RGE C12 0.1uF DVDD FRC_BAT54 FRC_BAT54 ONS_MMBZ5231BLT1 VIN2 VOUT 6 TRIM 5GND4 TEMP3 REF5020ID AVDD A0(+) 2 A1(+) 4 A2(+) 6 A3(+) 8 A4 10 A5 12 A6 14 A7 16 REF- 18 REF+ 20 A0(-)1 A1(-)3 A2(-)5 A3(-)7 AGND9 AGND11 AGND13 VCOM15 AGND17 AGND19 DAUGHTER-ANALOG J8A (TOP) = SAM_TSM-110-01-L-DV-P J8B (BOTTOM) = SAM_SSW-110-22-F-D-VS-K IN1 GND 2EN3 OUT 5 BYP 4 TPS79225DBV FRC_FDN302P2 4 5 3 SN74LVC1G07DBV R23 100K +5V +5V FRC_FDN337N +5V 2 4 5 3 SN74AHCT1G04DBV +5V +3.3V -VA 2 -5VA 4 AGND 6 VD1 8 +5VD 10 +VA1 +5VA3 DGND5 +1.8VD7 +3.3VD9 J11 DAUGHTER-POWER ADC AVDD ADC AVSS DIGITAL=3.3V DGND AGND DVDD JUMPER FUNCTIONS ONS_MMBZ5231BLT1 J11A (TOP) = SAM_TSM-105-01-L-DV-P J11B (BOTTOM) = SAM _SSW-105-22-F-D-VS-K IN2 GND 1EN3 OUT 5 BYP 4 TPS72325DBV FRC_FDN302P R13 100K C16 10uF AVDD AVDD DVDD C33 1uF -5VA 5.1V -2.5V +2.5V C23 10uF C22 10uF C20 10uF R15 R14 R10 3J2 JPR-1X3 OPA227 Ref- Ref+ DVDD 22uF C11 0.1uF C18 10uF C19 10uFC13 0.1uF RUSSELL ANDERSON RUSSELL ANDERSON 6496962 11-Feb-2009 ADS1148EVM A 1uF 1 2 3 4 5 6 7 8 9 10 J10 JPR-2X5 1uF DVDD CLK 3 SCLK 28 DOUT/DRDY 26DRDY 25DIN 27 CS 24 AIN3/Iexc/GPIO318 AIN6/Iexc/GPIO615 AIN1/Iexc12 REF0N/GPIO16 START 23 IOUT2 19 AIN0/Iexc11 AIN2/Iexc/GPIO217 AVDD22 AVSS 21 VREFCOM10 VREFP9 IOUT1 20 RESET 4 REF1N8 DVDD1 DGND 2 REF0P/GPIO05 AIN7/Iexc/GPIO716 AIN4/Iexc/GPIO413 AIN5/Iexc/GPIO514 REF1P7 U10 ADS1148IPW C21 10uF R16 R17 Ref+ Ref- R11 R12 C26 47pF C25 47pF C24 47pF C27 47pF C28 47pF C29 47pF C30 47pF C31 47pF 0.1uF 0.1uF 0.1uF C10 0.1uF C17 10uF TP3 Int REF TP1 AVSS TP4 AVDD TP2 REFPS1 AVDD TP5 REFCOM R21 100 R22 100 1 2 JPR-2X1 1 2 JPR-2X1 TERMBLOCK-3 RA1A 100K -5V TERMBLOCK-9 C34 0.1uF FRC_BAT54 FRC_BAT54 A01 A12 GND 4 SDA 5 SCL 6 WP7 VCC 8 A23 U11 MCP_24AA256-I/ST C35 0.1uF DVDD DVDD J12 HEADER-3X2 RA2 100K R24 2.7K R25 2.7K DVDD

12 J13

0.1uF DVDD VDD5 RESET4 MR 3 CT 1 GND 2 U12 TPS3836DBV ADS1248EVM ADS1248IPW

A B C D 654321 D C B A ti REV ENGINEERING CHANGE NUMBER APPROVED B PRECISION ANALOG PRODUCTS HIGH-PERFORMANCE ANALOG DIVISION SEMICONDUCTOR GROUP DOCUMENT CONTROL NO. +5V -5V +5V C14 150nF C15 0.1uF 0.1uF 1uF 10K JPR-1X3 22uF GND TP6 GND CNTL1 CLKX3 CLKR5 FSX7 FSR9 DX11 DR13 INT15 TOUT17 GPIO519 GPIO0 2 DGND 4 GPIO1 6 GPIO2 8 DGND 10 GPIO3 12 GPIO4 14 SCL 16 DGND 18 SDA 20 SERIALHDR OBCLK EOH1 GND 2OUT3 VCC 4 CRY_C3391-4.096 DVDD C32 10nF C0G A 1 B 2Y3 GND 4 Y5 A/B 6 VCC8 SN74LVC2G157DCT R20 470K R18 47K R19 470K TOUT GPIO5 J7A (TOP) = SAM_TSM-110-01-L-DV-P J7B (BOTTOM) = SAM_SSW-110-22-F-D-VS DVDD P001 P012 P023 P034 P045 P056 P067 P078 GND9 P1010 P1111 P1212 P13 13 P14 14 P15 15 P16 16 P17 17 A0 18 SCL 19SDA 20VCC 21INT 22A1 23A2 24 PCA9535RGE C12 0.1uF DVDD FRC_BAT54 FRC_BAT54 ONS_MMBZ5231BLT1 VIN2 VOUT 6 TRIM 5GND4 TEMP3 REF5020ID AVDD A0(+) 2 A1(+) 4 A2(+) 6 A3(+) 8 A4 10 A5 12 A6 14 A7 16 REF- 18 REF+ 20 A0(-)1 A1(-)3 A2(-)5 A3(-)7 AGND9 AGND11 AGND13 VCOM15 AGND17 AGND19 DAUGHTER-ANALOG J8A (TOP) = SAM_TSM-110-01-L-DV-P J8B (BOTTOM) = SAM_SSW-110-22-F-D-VS-K IN1 GND 2EN3 OUT 5 BYP 4 TPS79225DBV FRC_FDN302P2 4 5 3 SN74LVC1G07DBV R23 100K +5V +5V FRC_FDN337N +5V 2 4 5 3 SN74AHCT1G04DBV +5V +3.3V -VA 2 -5VA 4 AGND 6 VD1 8 +5VD 10 +VA1 +5VA3 DGND5 +1.8VD7 +3.3VD9 J11 DAUGHTER-POWER ADC AVDD ADC AVSS DIGITAL=3.3V DGND AGND DVDD JUMPER FUNCTIONS ONS_MMBZ5231BLT1 J11A (TOP) = SAM_TSM-105-01-L-DV-P J11B (BOTTOM) = SAM _SSW-105-22-F-D-VS-K IN2 GND 1EN3 OUT 5 BYP 4 TPS72325DBV FRC_FDN302P R13 100K C16 10uF AVDD AVDD DVDD C33 1uF -5VA 5.1V -2.5V +2.5V C23 10uF C22 10uF C20 10uF R15 R14 R10 3J2 JPR-1X3 OPA227 Ref- Ref+ DVDD 22uF C11 0.1uF C18 10uF C19 10uFC13 0.1uF RUSSELL ANDERSON RUSSELL ANDERSON 6496962 31-Jul-2009 ADS1148EVM B 1uF 1 2 3 4 5 6 7 8 9 10 J10 JPR-2X5 1uF DVDD CLK 3 SCLK 28 DOUT/DRDY 26DRDY 25DIN 27 CS 24 AIN3/Iexc/GPIO318 AIN6/Iexc/GPIO615 AIN1/Iexc12 REF0N/GPIO16 START 23 IOUT2 19 AIN0/Iexc11 AIN2/Iexc/GPIO217 AVDD22 AVSS 21 VREFCOM10 VREFP9 IOUT1 20 RESET 4 REF1N8 DVDD1 DGND 2 REF0P/GPIO05 AIN7/Iexc/GPIO716 AIN4/Iexc/GPIO413 AIN5/Iexc/GPIO514 REF1P7 U10 ADS1148IPW C21 10uF R16 R17 Ref+ Ref- R11 R12 C26 47pF C25 47pF C24 47pF C27 47pF C28 47pF C29 47pF C30 47pF C31 47pF 0.1uF 0.1uF 0.1uF C10 0.1uF C17 10uF TP3 Int REF TP1 AVSS TP4 AVDD TP2 REFP AVDD TP5 REFCOM R21 100 R22 100 1 2 JPR-2X1 1 2 JPR-2X1 TERMBLOCK-3 RA1A 100K -5V TERMBLOCK-9 C34 0.1uF FRC_BAT54 FRC_BAT54 A01 A12 GND 4 SDA 5 SCL 6 WP7 VCC 8 A23 U11 MCP_24AA256-I/ST C35 0.1uF DVDD DVDD RA2 100K R24 2.7K R25 2.7K DVDD 0.1uF DVDD VDD5 RESET4 MR 3 CT 1 GND 2 U12 TPS3836DBV ADS1248EVM ADS1248IPW J12 HEADER-3X2_SPECIAL

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Product Information

745C101104JPTR specifications and overview.

Summary

Contains all support circuitry needed for the ADS1148/ADS1248

Description

Contains all support circuitry needed for the ADS1148/ADS1248

Source title 745C101104JPTR Datasheet(PDF) - Texas Instruments

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