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Texas Instruments ADS1259EVM, Руководство пользователя

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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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6

4

Power Supplies

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7

5

Voltage Reference

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8

6

ADS1259 Control

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9

7

Clock Source

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9

8

EVM Operation

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10

9

ADS1259EVM-PDK Operation

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12

10

Evaluating Performance with the ADCPro Software

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27

11

Schematics and Layout

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35

List of Figures

1

Test Points TP11 and TP12

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5

2

Switch S2 and Jumper J15

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6

3

Switch S3

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6

4

Jumper J10

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8

5

Switch S1

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8

6

Switch S4

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9

7

ADS1259EVM Default Jumper Positions

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11

8

ADS1259EVM Default Switch Positions

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11

9

ADS1259EVM-PDK Setup Wizard: Screen 1

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13

10

ADS1259EVM-PDK Setup Wizard: Screen 2

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13

11

ADS1259EVM-PDK Setup Wizard: Screen 3

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14

12

ADS1259EVM-PDK Setup Wizard: Screen 4

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14

13

MMB0 Initial Configuration

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15

14

Connecting the ADS1259EVM to the MMB0

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16

15

Using the +6V Wall Supply for +5V

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17

16

MMB0 Configured for Lab Power Supply

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18

17

NI-VISA Driver Installation Wizard, Screen 1

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19

18

NI-VISA Driver Installation Wizard, Screen 2

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20

19

NI-VISA Driver Installation Wizard, Screen 3

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20

20

NI-VISA Driver Installation Wizard, Screen 4

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21

21

NI-VISA Driver Verification Using Device Manager

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21

22

ADCPro Software Start-up Display Window

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22

23

ADS1259EVM-PDK Plug-In Display Window

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23

24

Install New Driver Wizard Screen 1

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24

25

Install New Driver Wizard Screen 2

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24

26

Install New Driver Wizard Screen 3

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25

27

Install New Driver Wizard Screen 4

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25

28

Install New Driver Wizard Screen 5

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26

29

USBStyx Driver Verification Using Device Manager

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26

30

Data Rate Control

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27

31

Over-Range Flag

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27

32

ADC Configuration Tab

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28

33

ADC Calibration Tab

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29

34

PGA Configuration Tab

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30

35

PGA GPIO Tab

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31

36

PGA Input Switch Tab

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32

2

ADS1259EVM, ADS1259EVM-PDK

SBAU163A – March 2010 – Revised April 2010

Submit Documentation Feedback

Copyright © 2010, Texas Instruments Incorporated

Содержание ADS1259EVM

Страница 1: ...This EVM allows performance evaluations of both the ADS1259 and the PGA280 The EVM also allows for PGA280 control of the ADS1259 through the use of the external chip select modes Complete circuit desc...

Страница 2: ...y for 5V 17 16 MMB0 Configured for Lab Power Supply 18 17 NI VISA Driver Installation Wizard Screen 1 19 18 NI VISA Driver Installation Wizard Screen 2 20 19 NI VISA Driver Installation Wizard Screen...

Страница 3: ...yer 2 37 43 Internal Layer 2 Layer 3 38 44 Bottom Side Layer 4 38 List of Tables 1 J8 Analog Interface Header Pinout 5 2 J7 Serial Data Interface Pins 7 3 J11 Configuration Power Supply Input 7 4 ADS1...

Страница 4: ...59EVM PDK Throughout this document the abbreviation EVM and the term evaluation module are synonymous with the ADS1259EVM 1 2 Introduction The ADS1259EVM is an evaluation module built to the TI Modula...

Страница 5: ...eference source input side of differential input J8 20 REFP External reference source input side of differential input J8 10 16 even Unused The output pins of the PGA280 VOP and VON can be accessed th...

Страница 6: ...the output common mode of the PGA280 Setting the switch to the left connects the output common mode to pin J8 15 of the analog interface header The center setting of the switch connects it to the midp...

Страница 7: ...XTCLK In None External Clock input J7 20 SDA SDA I2 C n a I2 C data Many pins on J7 have weak pull up down resistors These resistors provide default settings for many of the control pins Furthermore m...

Страница 8: ...ption with the internal ADS1259 reference Switch S1 selects an external reference from an external reference voltage using pins J8 18 REF and J8 20 REF from the analog interface header or the REF5025...

Страница 9: ...s the PGA280 to the ADS1259 though several of the PGA GPIOs Note that this method of control is used in the ADS1259EVM PDK and that jumpers J2 J3 and J4 must be set to the left to enable control throu...

Страница 10: ...R2 C10 C11 and C12 before reaching the ADS1259 The common mode voltage VCOM for the PGA280 input buffer is 2 5V supplied from the REFOUT of the ADS1259 the VCOM pin at the analog header J8 15 or a vol...

Страница 11: ...itches are used on the ADS1259 PGA280 Three way switch S1 is set to the center position setting the output common mode of the PGA280 to AVDD 2 Switch S2 is set to the right connecting the ADS1259 refe...

Страница 12: ...re is available from the TI website at http www ti com The CD ROM shipped with the ADS1259EVM may not contain the latest software but the ADCPro installer will check for updates when executed if conne...

Страница 13: ...Figure 9 ADS1259EVM PDK Setup Wizard Screen 1 Figure 10 ADS1259EVM PDK Setup Wizard Screen 2 13 SBAU163A March 2010 Revised April 2010 ADS1259EVM ADS1259EVM PDK Submit Documentation Feedback Copyright...

Страница 14: ...nstalled but the USB drivers may not yet have been loaded by the PC operating system This step completes when the ADCPro software is executed see Section 9 4 Running the Software and Completing Driver...

Страница 15: ...in Figure 13 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 5VA disconnected on jumper block J13 If the PDK will be powered from an...

Страница 16: ...ular EVM System motherboard It is designed around the TMS320VC5507 a DSP with an onboard USB interface from Texas Instruments The MMB0 also has 16MB of SDRAM installed The MMB0 is not sold as a DSP de...

Страница 17: ...properly 9 3 1 Using the 6V Wall Supply for 5V An ac adapter can be connected to barrel jack J2 on the MMB0 J2 is located next to the USB connector The adapter must output 6V to 7V dc The connector m...

Страница 18: ...ower Supply To use a lab power supply configuration Disconnect J12 on the MMB0 Connect a 5V dc supply to the 5VA terminal on J14 Connect ground of the dc supply to the GND terminal on J14 Connect a 10...

Страница 19: ...and complete the necessary driver installation Make sure the ADCPro software and device plug in software are installed from the CD ROM as described in Section 9 1 9 4 1 NI VISA USB Device Driver Insta...

Страница 20: ...8 NI VISA Driver Installation Wizard Screen 2 Figure 19 NI VISA Driver Installation Wizard Screen 3 20 ADS1259EVM ADS1259EVM PDK SBAU163A March 2010 Revised April 2010 Submit Documentation Feedback Co...

Страница 21: ...he NI VISA drivers You can verify proper installation by opening the Windows Device Manager and locating the drivers as shown in Figure 21 Figure 21 NI VISA Driver Verification Using Device Manager 21...

Страница 22: ...software by selecting ADCPro from the Windows Start menu The screen in Figure 22 appears Figure 22 ADCPro Software Start up Display Window 22 ADS1259EVM ADS1259EVM PDK SBAU163A March 2010 Revised Apri...

Страница 23: ...us 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 24 through Figure 28...

Страница 24: ...Figure 24 Install New Driver Wizard Screen 1 Figure 25 Install New Driver Wizard Screen 2 24 ADS1259EVM ADS1259EVM PDK SBAU163A March 2010 Revised April 2010 Submit Documentation Feedback Copyright 2...

Страница 25: ...Figure 26 Install New Driver Wizard Screen 3 Figure 27 Install New Driver Wizard Screen 4 25 SBAU163A March 2010 Revised April 2010 ADS1259EVM ADS1259EVM PDK Submit Documentation Feedback Copyright 2...

Страница 26: ...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 disappears and a new item LibUSB...

Страница 27: ...ting on the ADS1259EVM plug in the setting immediately updates on the board Settings on the ADS1259EVM correspond to settings described in the ADS1259 data sheet and the PGA280 data sheet available fo...

Страница 28: ...VM There are two different digital filter options for the ADS1259 A fixed decimation sinc5 filter is then followed by either a sinc1 filter or a sinc2 filter that is selected by the pull down menu lab...

Страница 29: ...egisters of the ADS1259 Figure 33 shows the ADC calibration tab Figure 33 ADC Calibration Tab In the Calibration Options subsection two buttons allow for an offset calibration and a gain calibration F...

Страница 30: ...must be clicked to proceed with the changes A pull down menu allows for the synchronization of the PGA280 chopper The chopper can be synchronized to the internal clock of the PGA280 or to an external...

Страница 31: ...a high or a low is selected with the Output push button If used as a GPIO input the value is shown by the indicator light on the right when the Read GPIO button is clicked Figure 35 PGA GPIO Tab Note...

Страница 32: ...low for switching in different inputs buffers supplies and current sources Click on the switch to enable or disable the switch For more information about switch function and control see the Input Swit...

Страница 33: ...down menu selects the suppression time for the error flags In the PGA280 data sheet this period is referred to as FLAGTIM and can be found in register 11 The Update Errors button clears the error reg...

Страница 34: ...ware About Tab The Plug in Version and Firmware Version indicators show the version numbers of the plug in and firmware code respectively The Notes indicator may show relevant notes about the plug in...

Страница 35: ...2012X5R1C106MT TDK CR10 CR11 C24 C25 6 C20 C21 3 Capacitor X7R Ceramic 0 47uF 10 25WV Size GRM188R71E474KA12D Murata Electronics C22 0603 7 C23 1 Capacitor X7R Ceramic 0 1uF 10 16WV Size 0603 C1608X7R...

Страница 36: ...lide Ultra Mini DPDT Top ACT SS22SDP2 NKK Switches of America 35 S2 1 Switch Slide DP3T PC MNT EG2305 E Switch 36 S3 S4 2 Switch Slide Ultra Mini SP3T TOP ACT SS14MDP2 NKK Switches of America 37 TP1 T...

Страница 37: ...ot intended to be used for manufacturing ADS1259EVM PCBs Figure 40 through Figure 44 show the PCB layouts for the ADS1259EVM Figure 40 Top Silk Image Figure 41 Top Side Layer 1 Figure 42 Internal Laye...

Страница 38: ...m Original March 2010 to A Revision Page Corrected descriptions of pins 11 8 and 11 9 in Table 3 7 NOTE Page numbers for previous revisions may differ from page numbers in the current version 38 Revis...

Страница 39: ...C20 470nF C21 470nF C22 470nF AVDD C4 18pF C5 18pF Bypass Capacitors for PGA280 ADS DRDY DOUT DIN SCLK ADS CS ADS START ADS RST PGA CS DVDD C23 100nF AVDD C24 10uF AVSS DVDD C25 10uF Bypass Capacitor...

Страница 40: ...he 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 e...

Страница 41: ...h statements TI products are not authorized for use in safety critical applications such as life support where a failure of the TI product would reasonably be expected to cause severe personal injury...

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