EVAL-AD7193-ASDZ Hardware Guide

Set-up Procedures

After following the instructions in the Software Procedures section, set up the evaluation and SDP boards as detailed in this section.

Warning

The evaluation software and drivers must be installed before connecting the EVAL-AD7193-ASDZ evaluation board and EVAL-SDP-CB1Z board to the USB port of the PC to ensure the PC correctly recognizes the evaluation system.

  • Connect the EVAL-AD7193-ASDZ to the controller board

    • Option A: Connect the EVAL-AD7193-ASDZ to the EVAL-SDP-CK1Z

      • Using the 120 pin connector

        • Screw the two boards together using the plastic screw-washer set included in the evaluation board kit to ensure that the boards are connected firmly together.

        • Using the Arduino Connectors

https://media.githubusercontent.com/media/analogdevicesinc/documentation/main/docs/solutions/reference-designs/eval-ad719x/images/sdp_connect.png

  • Option B: Connect the EVAL-AD7193-ASDZ to the EVAL-SDP-CB1Z

    • Using the 120 pin connector

      • Screw the two boards together using the plastic screw-washer set included in the evaluation board kit to ensure that the boards are connected firmly together.

Block Diagram

https://media.githubusercontent.com/media/analogdevicesinc/documentation/main/docs/solutions/reference-designs/eval-ad719x/images/ad7193_blockdiag.png

On Board Connections

Bridge Connections

Connector P3: DC (Analog Input)

Functionality:

  • Bridge Connection

Connection

Function

1

Ground/Sheild

2

Excitation-

3

External Reference -

4

AIN 7 with DC filtering

5

AIN 8 with DC filtering

6

External Reference +

7

Excitation+

8

Ground/Sheild

External Powers

Connector

Function

P4 Pin 1-2

External IOVDD connection

P4 Pin 3-4

External AVDD connection

LK10

External AVDD connection for SCP Boards

LK11

External IOVDD connection for SCP Boards

Digital Connectors

SDP 120 Pin Connector P5

Function

Arduino connector P6,P7,P9,P10

3,4

GND

P7-6,P7-7

5

V_USB

P7-5

6,11,17,23,28,36,40,46,52

GND

P9-7

56

EEPROM_A0

58,63,69,75

GND

78

SYNC_IN

P10-5

79

SCL

P10-10

80

SDA

P10-9

81

GND

82

SCLK

P10-6

83

SDO/miso

P10-5

84

SDI/mosi

P10-4

85

CS_N

P9-3,P9-2

86,93,98,109,115

GND

116

VIO

P7-2

117,118

GND
https://media.githubusercontent.com/media/analogdevicesinc/documentation/main/docs/solutions/reference-designs/eval-ad719x/images/ad7193_arduinoheader.png

Pmod Connector P11

Connection

Function

Connection

Function

1

CS_N

7

2

DIN

8

3

DOUT

9

4

SCLK

10

5

GND

11

GND

6

IOVDD

12

IOVDD
https://media.githubusercontent.com/media/analogdevicesinc/documentation/main/docs/solutions/reference-designs/eval-ad719x/images/ad7193_pmodheader.png

SMB Connections

There are 3 SMB connections on the board. To allow clock signals and reference into the board.

  • J1 Provides option for External Reference+

  • J2 Provides option for External Reference-

  • J3 Brings external MCLK to the AD7193

Power Supplies

The evaluation board receives power through the controller board when connected to the PC via USB. Linear regulators generate the required power supply levels from the applied USB voltage.

AVDD (LK9) selection

  • 5V supply (DEFAULT)

    • 5V regulator supplies AVDD ADP7142

  • 3.3V supply

    • 3.3V regulator supplies AVDD ADP150

  • External AVDD

    • Connections on Connector P4

DVDD (LK7) selection

  • 3.3V supply (DEFAULT)

    • 3.3V supplies DVDD

  • AVDD

    • AVDD connected to DVDD

IOVDD (LK8) selection

  • 3.3V supply (DEFAULT)

    • 3.3V regulator supplies IOVDD ADP150

  • External IOVDD

    • Connections on Connector P4

  • V_IO from SDP

    • R38 to be mounted

Serial Interface

There are four primary signals: CS, SCLK, SDI, and SDO/RDY (all are inputs, except for SDO/RDY, which is an output).

Serial communication options

  • SDP-B board and the respective 120 pin SDP connector.

  • When using the SDP-B connection (120 pin) The evaluation board connects via the serial peripheral interface (SPI) to the Blackfin® ADSP-BF527 on the SDP-B board.

    • Arduino connection SDP-K1

    • Pmod connector

    • Standalone mode

Reference Options

  • DEFAULT ADR4525 On Board external reference on REFIN1+

  • LTC6655LN-2.5/LTC6655LN-4.096 On Board external reference on REFIN+

    • Option to use ultra low noise reference

  • External Reference on REFIN1+ Connector J1

  • AVDD as Reference via R25

  • External reference can be supplied on P1-1 and P1-2 for REFIN2+ and REFIN2-

Selecting the reference source:

Software

Board should be correctly connected to ACE

  • Option A: Open AD7193 memory map

    • Search for the Configuration register

    • Set the REFSEL[] to the desired reference source by using these bits:

      • REFSEL[0]: External reference applied between REFIN1(+) and REFIN1(−).

      • REFSEL[1]: External reference applied between P1/REFIN2(+) and P0/REFIN2(-) pins.

  • Option B: Open AD7193 Chip View

    • Right click on ADC block

    • Select Reference Source from the Reference Select option given as highlighted(1) below in the picture.

    • Click on Apply Changes as highlighted(2) below.

https://media.githubusercontent.com/media/analogdevicesinc/documentation/main/docs/solutions/reference-designs/eval-ad719x/images/refsel.png

GPIOs

The General purpose inout pins are powered by AVDD/AVSS. They can be used to provide AC-Excitation signals for AC-Excited sensors, using 2 or 4 outputs. Can be used to automatically control an external multiplexer. Other optional functions include Current Source outputs , 2nd Reference input, Power-down switch.

GPIO

Bit Name

Functionality

BPDSW

BPDSW

Bridge power-down switch

P3

P3DAT

Digital Output P3

P2

P2DAT

Digital Output P2

P1

P1DAT

Digital Output P1/REFIN2+

P0

P0DAT

Digital Output P0/REFIN2-

Evaluation board Connections and Functionality

The evaluation board highlights the functionality of the GPIOs

BPDSW

  • Available on the P1 connector.

  • Used as a Power Switch for Wire Bridge applications

P0/REFIN2-

  • Available on the P1 connector.

  • Also used as secondary reference option.

P1/REFIN2+

  • Available on the P1 connector.

  • Also used as secondary reference option.

Design and Integration Files

Schematics, layout files, and bill of materials are available on the EVAL-AD7193ASDZ product page.