Texas Instruments ADS1672EVM User Manual
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Texas Instruments ADS1672EVM User Manual

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ADS1672EVM and ADS1672EVM-PDK User's Guide
This user's guide describes the characteristics, operation, and use of the ADS1672EVM, both by itself and
as part of the ADS1672EVM-PDK. This evaluation module (EVM) is an evaluation platform for the
ADS1672, a high-speed, single-channel, 24-bit, 625kHz delta-sigma analog-to-digital converter (ADC).
The EVM allows evaluation of all aspects of the ADS1672 device using a standard serial CMOS interface.
A complete circuit description, schematic diagram, and bill of materials are included.
The following related documents are available through the Texas Instruments web site at
http://www.ti.com.
ADCPro is a trademark of Texas Instruments.
Microsoft, Windows are registered trademarks of Microsoft Corporation.
All other trademarks are the property of their respective owners.
SBAU147 – March 2009
Submit Documentation Feedback
ADS1672EVM (Left) and ADS1672EVM-PDK (Right)
EVM-Compatible Device Data Sheets
Device
ADS1672
REF5030
THS4520
REF5025
OPA211
PCA9535
Literature Number
SBAS402
SBOS410
SLOS503
SBOS410
SBOS377
SCPS129
ADS1672EVM and ADS1672EVM-PDK User's Guide
User's Guide
SBAU147 – March 2009
1

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  • Page 1 ADS1672EVM and ADS1672EVM-PDK User's Guide ADS1672EVM (Left) and ADS1672EVM-PDK (Right) This user's guide describes the characteristics, operation, and use of the ADS1672EVM, both by itself and as part of the ADS1672EVM-PDK. This evaluation module (EVM) is an evaluation platform for the ADS1672, a high-speed, single-channel, 24-bit, 625kHz delta-sigma analog-to-digital converter (ADC).

  • Page 3: Analog Interface

    You can connect the ADS1672EVM through the MMB0 motherboard and then to a computer via an available USB port. This manual shows how to use the MMB0 as part of the ADS1672EVM-PDK, but does not provide technical details about the MMB0 itself.
  • Page 4 Analog Interface (NI) (NI) (NI) (NI) (NI) (NI) -IN (J1 or P3-1) THS4520 ADS1672 +IN (J2 or P3-2) (NI) (NI) (NI) (NI) (NI) (NI)
  • Page 5 FollowingtheTHS4520,anR-CnetworkconnectsdirectlytotheAD...

  • Page 6: Power Supplies

    Always J4.4 No connection J4.5 No connection J4.6 AGND Analog ground input Always J4.7 No connection J4.8 No connection J4.9 +3.3V 3.3V digital supply Always J4.10 No connection ADS1672EVM and ADS1672EVM-PDK User's Guide SBAU147 – March 2009 Submit Documentation Feedback...

  • Page 7: Digital Interface

    Digital Interface www.ti.com Digital Interface It is easy to interface the ADS1672EVM board to multiple control platforms. The P2 connector (Figure Samtec part number SSW-110-22-S-D-VS) provides a convenient digital access to the key ADS1672 I/O a s s e t pins.
  • Page 8 Digital Interface Serial Data Interface, P2...

  • Page 9: Clock Source

    =FPATH=is= Clock Source www.ti.com Digital Control Signal PIN Configuration, SW1 When using the I C function through U5 (with or without ADCPro connected), all SW1 switches should be in the OFF position (see Figure The data clock and data out communications are directed through P2. All remaining ADS1672 digital control pins are configured with SW1.

  • Page 10: Evm Operation

    Figure 6. W2 and W3 Jumpers for External Modulator Clock Use as a Stand-Alone EVM The ADS1672EVM can be used as a stand-alone EVM, provided that the proper control signals are applied to serial input connector P2 (top or bottom side). The required power supplies (+5VA and +3.3VD) can be connected directly to J4 pins 3 and 9 or test points TP5 and TP7, respectively.
  • Page 11 ADS1672EVM-PDK Power Supply The ADS1672EVM can be powered with the J4 connector or by attaching the MMB0 board. The MMB0 board provides the 5V and 3.3V power to the ADS1672EVM. Because the circuitry is provided on the ADS1672EVM, the complete system can be powered from the supplied +6V, 3A ac adapter.
  • Page 12 The latest software is available from Texas Instruments' website at http://www.ti.com/. The CD-ROM shipped with the ADS1672EVM may not contain the latest software, but the ADCPro installer will check for updates when executed (if connected to the Internet), and then give you the option of downloading and installing the latest version.
  • Page 13 ADS1672EVM-PDK Kit Operation www.ti.com 10.2 Setting Up the ADS1672EVM-PDK The ADS1672EVM-PDK contains both the ADS1672EVM and the MMB0 motherboard; however, the devices are shipped unconnected. Follow these steps to set up the ADS1672EVM-PDK: Step 1. Unpack the ADS1672EVM-PDK kit. Step 2. Set the jumpers and switches on the MMB0 as shown in Figure •...
  • Page 14 Do not misalign the pins when plugging the ADS1672EVM into the MMB0. Check the pin alignment carefully before applying power to the PDK. Step 3. Set the jumpers and switches on the ADS1672EVM as shown in Figure 8 (note that these settings are the factory-configured settings for the EVM).
  • Page 15 www.ti.com About the MMB0 11.1 Connecting the Power Supply 11.1.1 Connecting an AC Adapter...
  • Page 16 It is not necessary to connect a +5V dc supply voltage to the +5VA terminal on J14 if the +5V/+5VA position on J13 is shorted. Figure 12. Laboratory Power-Supply Connection ADS1672EVM and ADS1672EVM-PDK User's Guide SBAU147 – March 2009 Submit Documentation Feedback...
  • Page 17 The program for evaluating the ADS1672EVM-PDK is called ADCPro. This program uses plug-ins to communicate with the EVM. The ADS1672EVM-PDK plug-in is included in the ADS1672EVM-PDK package.
  • Page 18 About the MMB0...
  • Page 19 www.ti.com...
  • Page 20 About the MMB0 www.ti.com Figure 17. Found New Driver Wizard, Screen 3 Figure 18. Found New Driver Wizard, Screen 4 ADS1672EVM and ADS1672EVM-PDK User's Guide SBAU147 – March 2009 Submit Documentation Feedback...
  • Page 21 You can adjust the ADS1672EVM settings when you are not acquiring data. During acquisition, all controls are disabled and settings may not be changed. When you change a setting on the ADS1672EVM plug-in, the setting is immediately updated on the board. SBAU147 – March 2009...
  • Page 22 Evaluating with the ADCPro Software www.ti.com Settings on the ADS1672EVM correspond to settings described in the ADS1672 data sheet; see the ADS1672 data sheet (available for download at the www.ti.com) for details. Because the effective data rate of the ADS1672 depends on settings of the Modulator Clock and the...

  • Page 23: Troubleshooting

    After you have configured the ADS1672 for your test scenario, pressing the ADCPro Acquire button will start the collection of the number of data points specified in the test plug-in Block Size control. The ADS1672EVM-PDK plug-in disables all the front panel controls while acquiring data, and displays a progress bar as shown in Figure Figure 25.

  • Page 24: Schematics And Layout

    Schematics and Layout www.ti.com Schematics and Layout Schematics for the ADS1672EVM are appended to this user's guide. The bill of materials is provided in Table Note: Board layouts are not to scale. Then Tm /F8 -9 Tf (scale2139.8 Tm /Fe2139.8 Tm /Fe2139.rg BT 1 0 0 1 134.4 12...
  • Page 26 12500 TI Boulevard. Dallas, Texas 75243 Title: REV: FILE: DATE: SIZE: SHEET:...

  • Page 33: Evaluation Board/Kit Important Notice

    LIABLEvariety’ EVALUATION BOARD/KIT IMPORTANT NOTICE Texas Instruments (TI) provides the enclosed product(s) under the following conditions: This evaluation board/kit is intended for use for ENGINEERING DEVELOPMENT, DEMONSTRATION, OR EVALUATION PURPOSES ONLY and is not considered by TI to be a finished end-product fit for general consumer use. Persons handling the product(s) must have electronics training and observe good engineering practice standards.

  • Page 34: Important Notice

    IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications, enhancements, improvements, and other changes to its products and services at any time and to discontinue any product or service without notice. Customers should obtain the latest relevant information before placing orders and should verify that such information is current and complete.

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Ads1672evm-pdk

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