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Contents

1

EVM Overview

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4

2

Analog Interface

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4

3

Digital Interface

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5

4

Power Supplies

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7

5

Voltage Reference

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8

6

Power-Down, Mode, and Format Control

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9

7

Clock Source

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9

8

EVM Operation

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10

9

ADS1278EVM-PDK Kit Operation

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14

10

Evaluating Performance with the ADCPro Software

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27

11

Schematics and Layout

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32

List of Figures

1

Connector J2

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7

2

Connectors J15, J16

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8

3

Connector J1

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8

4

Switch S1

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9

5

Jumper J19

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10

6

Amplifier Selection Switches

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11

7

ADS1278EVM Default Jumper Locations

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13

8

MMB0 Initial Setup

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15

9

Connecting ADS1278EVM to MMB0

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16

10

Connecting an AC Adapter

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17

11

Laboratory Power-Supply Connection

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18

12

NI-VISA Driver Installation

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19

13

NI-VISA Driver Installation Question

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20

14

NI-VISA Driver Installing

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20

15

NI-VISA Driver Complete Installation

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21

16

NI-VISA Driver Verification Using Device Manager

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21

17

ADCPro Software Start-up Display Window

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22

18

ADS1278EVM-PDK Plug-In Display Window

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23

19

Install New Driver Wizard Screen 1

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24

20

Install New Driver Wizard Screen 2

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24

21

Install New Driver Wizard Screen 3

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25

22

Install New Driver Wizard Screen 4

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25

23

Install New Driver Wizard Screen 5

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26

24

USBSytx Driver Verification Using Device Manager

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26

25

Channel Enable

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27

26

Manual Channel Control

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28

27

Clock Settings and Mode

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29

28

Operating Mode

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30

29

Output Data Format

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30

30

Progress Bar While Collecting Data

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31

List of Tables

1

J9/J7: Analog Interface Pinout

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5

2

J8: Supplemental Analog Interface Pinout

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5

3

J5: Serial Interface Pins

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6

4

J3 Configuration: Power-Supply Input

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7

5

J15 +10V Selection

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8

6

J16 –10V Selection

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8

7

List of Switches

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13

2

ADS1178EVM, ADS1278EVM, ADS1178EVM-PDK, and ADS1278EVM-PDK

SBAU129C – November 2007 – Revised July 2008

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Summary of Contents for ADS1178EVM

Page 1: ...scriptions schematic diagrams and bills of material are included in this document The following related documents are available through the Texas Instruments web site at http www ti com EVM Compatible...

Page 2: ...Complete Installation 21 16 NI VISA Driver Verification Using Device Manager 21 17 ADCPro Software Start up Display Window 22 18 ADS1278EVM PDK Plug In Display Window 23 19 Install New Driver Wizard S...

Page 3: ...i com 8 Operating Modes Clock Frequency 28 9 ADS1278EVM Bill of Materials 32 SBAU129C November 2007 Revised July 2008 ADS1178EVM ADS1278EVM ADS1178EVM PDK and ADS1278EVM PDK 3 Submit Documentation Fee...

Page 4: ...t ADCPro see the ADCPro Analog to Digital Converter Evalutation Software User s Guide http focus ti com lit ug sbau128 sbau128 pdf available for download for the TI web site This manual covers the ope...

Page 5: ...differential input J9 20 EXTREFP External Reference source input side of differential input J9 10 16 even Unused J9 15 Unused J9 9 19 odd J7 1 AGND Analog ground connections except J1 15 Table 2 J8 S...

Page 6: ...15 INT DRDY FSYNC Out None J5 16 SCL SCL I2 C N A I2 C clock J5 17 TOUT CLK In None Can be used to provide a clock from a processor J5 18 DGND DGND In Out None Digital ground J5 19 GPIO5 CLK Select No...

Page 7: ...J3 3 5VA 5V analog supply Always J3 4 5VA 5V analog supply No J3 5 DGND Digital ground input Yes J3 6 AGND Analog ground input Yes J3 7 1 8VD 1 8V digital supply No J3 8 3 3VD 3 3V digital supply Alw...

Page 8: ...278EVM has three sources for the reference voltage Jumper J1 can select the voltage from either the REF3125 U1 or REF5025 U2 The reference from either source is filtered and buffered by U3A Switch S1...

Page 9: ...e if they are not However it cannot detect if the switches are changed after startup CAUTION When using the EVM as part of the ADS1278EVM PDK the DIP switches S10 and S11 must all be switched so that...

Page 10: ...TOUT pin is still driven by a processor in order to avoid conflicts Jumper J19 can be used to always select the 27MHz crystal IOVDD position or allow the onboard external clock selection to be contro...

Page 11: ...controlled directly with pins on J5 Other signals such as the Power Down controls can only be controlled with slide switches or by U17 and U18 that are set up and read using the I2 C signals on pins...

Page 12: ...al J5 5 This ensures that the CLK and SCLK signals have the same phase and the correct ratio as outlined in the data sheet of the device Port P10 of the I2 C port expander U18 is connected to a logic...

Page 13: ...tory default conditions for each Table 7 List of Switches Switch Default Position Switch Description S1 Left Onboard reference S2 S4 Left Ain1 3 terminal block amplifiers bypassed S5 Up Ain4 terminal...

Page 14: ...available from the TI website at http www ti com The CD ROM shipped with the ADS1278EVM may not contain the latest software but the ADCPro installer will check for updates when executed if connected...

Page 15: ...K kit Step 2 Set the jumpers and switches on the MMB0 as shown in Figure 8 Set the Boot Mode switch to USB Connect 5V and 5VA on jumper block J13 if 5V is supplied from J14 5VA Leave 5V and VA disconn...

Page 16: ...lignment carefully before applying power to the PDK Step 4 Set the jumpers and switches on the ADS1278EVM as shown in Figure 7 note that these settings are the factory configured settings for the EVM...

Page 17: ...r 5V supply or a combination of 5V and bipolar 10V to 15V supply When the MMB0 DSP is powered properly LED D2 glows green The green light indicates that the 3 3V supply for the MMB0 is operating prope...

Page 18: ...5VA position on J13 is shorted Figure 11 Laboratory Power Supply Connection Note The software is continually under development These instructions and screen images are current at the time of this wri...

Page 19: ...lling the drivers for the hardware Figure 12 through Figure 15 are provided for reference to show the installation steps For the first screen Figure 12 it is not necessary to search for the software i...

Page 20: ...on www ti com Figure 13 NI VISA Driver Installation Question Figure 14 NI VISA Driver Installing 20 ADS1178EVM ADS1278EVM ADS1178EVM PDK and ADS1278EVM PDK SBAU129C November 2007 Revised July 2008 Sub...

Page 21: ...of the NI VISA drivers You can verify proper installation by opening the Device Manager and locating the driver as shown in Figure 16 Figure 16 NI VISA Driver Verification Using Device Manager SBAU12...

Page 22: ...tart the software by selecting ADCPro from the Windows Start menu The screen in Figure 17 appears Figure 17 ADCPro Software Start up Display Window 22 ADS1178EVM ADS1278EVM ADS1178EVM PDK and ADS1278E...

Page 23: ...status area indicating this action 4 If you have not yet loaded the operating system drivers Windows will display the Windows Install New Driver Wizard sequence illustrated in Figure 19 through Figure...

Page 24: ...ww ti com Figure 19 Install New Driver Wizard Screen 1 Figure 20 Install New Driver Wizard Screen 2 24 ADS1178EVM ADS1278EVM ADS1178EVM PDK and ADS1278EVM PDK SBAU129C November 2007 Revised July 2008...

Page 25: ...Operation Figure 21 Install New Driver Wizard Screen 3 Figure 22 Install New Driver Wizard Screen 4 SBAU129C November 2007 Revised July 2008 ADS1178EVM ADS1278EVM ADS1178EVM PDK and ADS1278EVM PDK 25...

Page 26: ...set and then reloading the plug in 6 You can verify the proper installation of the USBStyx driver using the Device Manager Note that the first driver item NI VISA USB Devices will disappear and a new...

Page 27: ...ns available on different tabs These controls are described in this section You can adjust the ADS1278EVM settings when you are not acquiring data During acquisition all controls are disabled and sett...

Page 28: ...1278 requires a clock to operate The maximum frequency is selected for the different operating modes as shown in Table 8 Table 8 Operating Modes Clock Frequency Operating Mode CLKDIV Frequency MHz Hig...

Page 29: ...e for the PLL to synthesize and which is within the maimum allowable frequency for the mode selected and will set the clock to that frequency as well as display the actual frequency used in the Clock...

Page 30: ...28 Operating Mode The CLKDIV control can be selected to be 0 or 1 The Data Output Formats are limited to the Frame Sync TDM Format but both Dynamic and Fixed Mode can be selected Figure 29 shows the o...

Page 31: ...ols while acquiring and displays a progress bar as shown in Figure 30 Figure 30 Progress Bar While Collecting Data For more information on testing analog to digital converters in general and using ADC...

Page 32: ...istor Thick Film Chip 47k 5 Panasonic ERJ 3GEYJ473V 1 10W Size 0603 10 2 100k R1 R72 Resistor Thick Film Chip 100k 5 Panasonic ERJ 3GEYJ104V 1 10W Size 0603 11 2 150k R53 R54 Resistor Thick Film Chip...

Page 33: ...ine to 1 Data Texas SN74LVC2G157DCT Selector Multiplexer Instruments 36 1 U16 LDO Voltage Regulator 1 8V 200mA Texas TPS73018DBV Instruments 37 1 U5 Dual Output 800mA dc dc Switchboost Texas TPS65131R...

Page 34: ...ch Half Pitch 6 Position C K TDA06H0SB1 56 1 S12 4PDT Slide Switch Top Actuator Tyco Alcoswi MMS42 tch 56 1 TP8 PCB Test Point Large Loop Keystone 5011 Through Hole Electronics 57 8 N A Shorting Block...

Page 35: ...Sch AINN3 AINN4 AINP3 AINP4 1 16 2 15 3 14 4 13 5 12 6 11 7 10 8 9 S10 DIPSWITCH 8 C16 2 2nF C0G C17 2 2nF C0G C18 2 2nF C0G C19 2 2nF C0G C20 2 2nF C0G C15 2 2nF C0G C14 2 2nF C0G C13 2 2nF C0G AINN1...

Page 36: ...9 R59 49 9 R8 1K C55 0 1uF C38 1 5nF C0G C39 1 5nF C0G C56 0 1uF 10V 10V R11 1K R9 1K R10 1K 8 2 1 3 6 4 5 VOCM U10 OPA1632 R60 49 9 R61 49 9 R12 1K C58 0 1uF C40 1 5nF C0G C41 1 5nF C0G C59 0 1uF 10V...

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Page 43: ...Sch AINN3 AINN4 AINP3 AINP4 1 16 2 15 3 14 4 13 5 12 6 11 7 10 8 9 S10 DIPSWITCH 8 C16 2 2nF C0G C17 2 2nF C0G C18 2 2nF C0G C19 2 2nF C0G C20 2 2nF C0G C15 2 2nF C0G C14 2 2nF C0G C13 2 2nF C0G AINN1...

Page 44: ...9 R59 49 9 R8 1K C55 0 1uF C38 1 5nF C0G C39 1 5nF C0G C56 0 1uF 10V 10V R11 1K R9 1K R10 1K 8 2 1 3 6 4 5 VOCM U10 OPA1632 R60 49 9 R61 49 9 R12 1K C58 0 1uF C40 1 5nF C0G C41 1 5nF C0G C59 0 1uF 10V...

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Page 51: ...product This notice contains important safety information about temperatures and voltages For additional information on TI s environmental and or safety programs please contact the TI application engi...

Page 52: ...siness practice TI is not responsible or liable for any such statements TI products are not authorized for use in safety critical applications such as life support where a failure of the TI product wo...

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