Texas Instruments ADS131E08EVM-PDK Скачать руководство пользователя страница 11 | Manualshive

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Texas Instruments ADS131E08EVM-PDK Скачать руководство пользователя страница 11

ADS131E08EVM Daughter-Card Hardware Overview

11

SBAU200C – June 2012 – Revised April 2020

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Copyright © 2012–2020, Texas Instruments Incorporated

Performance Demonstration Kit for the ADS131E08

The front-end board must be properly configured in order to achieve the various power-supply schemes.
The default power-supply setting for the ADS131E08EVM is a bipolar analog supply of ±2.5 V, and there
are onboard options to switch to a unipolar analog supply of +3 V. The digital supply (DVDD) is selectable
to 3.3 V or +1.8 V.

shows the board and component configurations for each analog power-

supply scheme.

shows the board configurations for the digital supply. Note that the EVM is

shipped with the analog supply set to ±2.5 V and digital supplies set to 3.3 V.

Table 3. Analog Supply Configurations

AVDD and AVSS

Unipolar Analog Supply

Bipolar Analog Supply

3 V

5 V

±1.5 V

±2.5 V

JP7

1-2

1-2

2-3

2-3

JP1

2-3

2-3

1-2

1-2

U6

TPS73230

TPS73250

Don't care

Don't care

U8

Don't care

Don't care

TPS73201

TPS73201

U7

Don't care

Don't care

TPS72301

TPS72301

R61

Don't care

Don't care

21 k

Ω

47.5 k

Ω

R62

Don't care

Don't care

78.7 k

Ω

43.2 k

Ω

R59

Don't care

Don't care

23.3 k

Ω

49.9 k

Ω

R60

Don't care

Don't care

95.3 k

Ω

46.4 k

Ω

C48, C54, C59

Not installed

Not installed

Not installed

Not installed

Table 4. Digital Supply Configurations (DVDD and

DGND)

DVDD

3.3 V

1.8 V

JP11

2-3

1-2

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Содержание ADS131E08EVM-PDK

Страница 1: ...bit low power integrated analog front end AFE designed for power protection circuits The ADS131E08EVM PDK is intended for prototyping and evaluation This user s guide includes a complete circuit desc...

Страница 2: ...ab 17 17 Internal Temperature Sensor 18 18 Eight Channel Read of Internal Temperature Data 18 19 GPIO Control Register GUI Panel 19 20 Fault Status Indicator 20 21 Device Register Settings 21 22 Scope...

Страница 3: ...ight channel analog to digital converter ADC The digital SPI control interface is provided by the MMB0 modular EVM motherboard that connects to the ADS131E08 evaluation board The ADS131E08EVM PDK is d...

Страница 4: ...the TI website at http www ti com to verify that you have the latest software Figure 2 ADS131E08EVM PDK Kit The complete kit includes the following items ADS131E08EVM printed circuit board PCB MMB0 mo...

Страница 5: ...the software that is intended for use with the EVM kit please verify that your PC compatible computer meets the following minimum requirements Pentium III or Celeron processor 866 MHz or equivalent M...

Страница 6: ...he software on a suitable PC Failure to observe this caution may cause Microsoft Windows to not recognize the ADS131E08EVM Download the latest software from the TI website at www ti com tool ADS131E08...

Страница 7: ...stalling the First USB Driver Apply power to the MMB0 using a power supply as discussed in Section 1 4 and connect the MMB0 to your PC through any available USB port The Found New Hardware Wizard wind...

Страница 8: ...Instruments Incorporated Performance Demonstration Kit for the ADS131E08 Navigate to C Program Files ADS131E08EVM USB Driver as shown in Figure 8 Figure 8 New Hardware Wizard Screen 3 Click Next to fi...

Страница 9: ...as shown in Figure 10 Figure 10 Second New Hardware Wizard Screen Click Next and the screen in Figure 11 appears Figure 11 Installing the USBStyx Driver Click Next to complete the installation If the...

Страница 10: ...kSPS and 64 kSPS NOTE 32 kSPS and 64 kSPS data capture is not supported by the current version of the firmware 3 V to 5 V unipolar or bipolar analog supply and 1 8 V to 3 V digital supply SPI data int...

Страница 11: ...urations for each analog power supply scheme Table 4 shows the board configurations for the digital supply Note that the EVM is shipped with the analog supply set to 2 5 V and digital supplies set to...

Страница 12: ...ly use the SiT8002AC 34 18E 2 048 The EVM is shipped with the external oscillator enabled 3 3 Reference The ADS131E08 has an on chip internal reference circuit that provides reference voltages to the...

Страница 13: ...control signals are available at connector J1 These signals are used to interface to the MMB0 board DSP The pinout for this connector is shown in Table 8 Table 8 Serial Interface Pinout Signal J1 Pin...

Страница 14: ...using a text editor Saving the data in this format can be completed by clicking the Save to File button as shown in Figure 12 An additional option in the evaluation software allows register configurat...

Страница 15: ...ng acquired data 4 2 Global Channel Registers The Channel Registers tab provides access to the ADS131E08 configuration and fault threshold registers The Global Channel Registers tab has the following...

Страница 16: ...igure 14 and the all channel specific mux is shown in Figure 15 Table 9 Register Assignments Channel Specific Settings Address Register Reset Value Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Chan...

Страница 17: ...e Scope Display Tab Configuration Register 2 controls the signal amplitude and frequency of an internally generated square wave test signal The primary purpose of this test signal is to verify the fun...

Страница 18: ...e sensor on the ADS131E08 is shown in Figure 22 Figure 17 Internal Temperature Sensor When the internal mux is routed to the temperature sensor input the output voltage of the ADC may be converted to...

Страница 19: ...ws the measurement of the supply voltage VS AVDD AVSS 2 for channels 1 2 5 6 7 and 8 however the supply voltage for channel 3 is DVDD 2 4 6 General Purpose I O Register GPIO The GPIO registers control...

Страница 20: ...rs FAULT_STATP and FAULT_STAIN The Fault Status registers store the status of whether the positive and or negative input on each channel has a fault This is a convenient feature to help pinpoint if an...

Страница 21: ...ight 2012 2020 Texas Instruments Incorporated Performance Demonstration Kit for the ADS131E08 4 8 Register Map The Register Device Register tab is a helpful debug feature that allows the user to view...

Страница 22: ...nt analysis tools available that enable a detailed examination of the signals selected by the front end mux Scope Histogram FFT 5 1 Scope Tool The Scope tool available under the Analysis tab is a very...

Страница 23: ...pop up window that displays the mean voltage root mean square RMS voltage and peak to peak voltage for noise analysis Figure 23 shows an example of this window Figure 23 Scope Analysis Tab Noise Leve...

Страница 24: ...al number of histogram bins set within the tab following acquisition The screen shot shown in Figure 25 illustrates the histogram output for an input shorted signal The same signal zoom analysis shown...

Страница 25: ...hows the FFT display Figure 27 Analysis FFT Graph of Normal Electrode Configuration 5 3 1 Coherent Frequency Calculator The red box labeled 1 in Figure 27 shows the Coherent Frequency Calculator Coher...

Страница 26: ...e creation of various histograms Press the Windowing button shown in in Figure 28 to evaluate the FFT graph under a variety of different windowing options Pressing the Reference button toggles between...

Страница 27: ...cy band defined by the Low Frequency and High Frequency fields The SNR displayed in this window also appears under the Dynamic Range heading as shown in Figure 30 Figure 30 Changing the User Defined D...

Страница 28: ...Not Installed 4 1 C9 CAP CER 22UF 6 3V 10 X5R 0805 Taiyo Yuden JMK212BJ226KG T 5 11 C10 C37 C38 C42 C43 C46 C47 C52 C53 C57 C58 CAP CER 10UF 10V 10 X5R 0805 Murata GRM219R61A106KE44D 6 10 C12 C13 C14...

Страница 29: ...26 1 R59 RES 49 9K OHM 1 10W 1 0603 SMD Yageo RC0603FR 0749K9L 27 1 R60 RES 46 4K OHM 1 10W 1 0603 SMD Yageo RC0603FR 0746K4L 28 1 R61 RES 47 5K OHM 1 10W 1 0603 SMD Yageo RC0603FR 0747K5L 29 1 R62 RE...

Страница 30: ...ADS131E08 schematic is appended to this document Revision History NOTE Page numbers for previous revisions may differ from page numbers in the current version Changes from B Revision February 2016 to...

Страница 31: ...Top Assembly Top Layer...

Страница 32: ...Internal Layer 1 Internal Layer 2...

Страница 33: ...Bottom Layer Bottom Assembly...

Страница 34: ...11 NI R12 NI A Tom Hendrick Tom Hendrick ADS13xE08 D1 NI D2 NI D3 NI D4 NI D5 NI D6 NI D7 NI D8 NI D9 NI 1 2 J5 CH1 IN2N IN2P IN4N IN4P 1 2 J8 CH4 1 2 J6 CH2 1 2 J9 CH5 AVDD AVSS R19 10k C70 470pF AVS...

Страница 35: ...0 1uF AVDD PWDN DAISY_IN GPIO3 GPIO4 DAISY_IN GPIO3 GPIO4 DAISY_IN 1 2 3 4 5 6 7 8 9 10 J4 NI JP5 EXT_CLK EXT_CLK TP11 TP12 TP1 TP2 2 5 A Tom Hendrick Tom Hendrick AGND AGND AGND AGND AGND AGND AGND...

Страница 36: ...MP 3 N C 1 N C 7 N C 8 U3 NI R56 NI VREFP R55 NI C32 NI 3 2 6 7 4 8 U4 NI External Reference Drivers C28 NI AVDD AVDD AVSS AVSS R52 NI C29 NI C30 NI C31 NI R53 NI C34 NI C33 NI R54 NI JP2 NI External...

Страница 37: ...C47 10uF TP5 VCC_ 5v AVSS C55 2 2uF C59 NI C56 2 2uF L4 470uH C58 10uF TP6 C46 10uF C57 10uF Power Supplies C49 0 1uF R61 47 5K R62 43 2K JP7 JP1 EN 3 NR FB 4 OUT 5 GND 2 IN 1 U6 TPS73230 R57 NI R58 N...

Страница 38: ...18 19 20 J2 VCC_5v DVDD 1 2 3 4 5 6 7 8 9 10 J3 TP8 TP10 TP9 TP7 C62 0 1uF C61 0 1uF C63 100uF C60 100uF CLKSEL SPI_DRDY SPI_OUT GPIO2 SPI_CLK SPI_CS SPI_START SPI_IN GPIO1 Dummy Connector JP3 RESET...

Страница 39: ...e resources are subject to change without notice TI grants you permission to use these resources only for development of an application that uses the TI products described in the resource Other reprod...

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