Texas Instruments VCA5807 User Manual
User's Guide
SLOU352–November 2012
VCA5807 Development Guide
This development guide describes the characteristics, operation and use of the VCA5807EVM
demonstration kit. This demonstration kit is an evaluation module for the VCA5807 device. The VCA5807
is an integrated Voltage Controlled Amplifier (VCA) that integrates a complete time-gain-control (TGC)
imaging path and a continuous wave Doppler (CWD) path. The VCA5807 is intended for prototyping and
evaluation. This user's guide includes a complete circuit description, schematic diagram, and bill of
materials (BOM).
The following related documents are available through the Texas Instruments web site at
http://www.ti.com.
Table 1. Related Document
Device Literature Number
VCA5807 SLOS727
Contents
1 VCA5807 Overview ......................................................................................................... 3
1.1 Important Disclaimer Information ................................................................................ 3
2 Overview ..................................................................................................................... 3
2.1 Introduction ......................................................................................................... 3
2.2 Default Configuration .............................................................................................. 4
3 Software Installation and Operation ...................................................................................... 5
3.1 Minimum Requirements ........................................................................................... 5
3.2 Installing the Software (PC Application) ........................................................................ 5
3.3 GUI Overview ....................................................................................................... 6
4 Hardware ................................................................................................................... 11
4.1 Introduction ........................................................................................................ 11
4.2 Board Configuration .............................................................................................. 12
4.3 Power .............................................................................................................. 13
4.4 Clock Buffer ....................................................................................................... 13
4.5 VCA Inputs ........................................................................................................ 13
4.6 VCA5807 Device ................................................................................................. 13
4.7 VCA Outputs ...................................................................................................... 13
4.8 CW Mode .......................................................................................................... 14
4.9 VControl ........................................................................................................... 16
4.10 Serial Interface .................................................................................................... 16
5 Quick Start .................................................................................................................. 17
5.1 Test Setup ......................................................................................................... 17
5.2 Power Up VCA5807EVM ........................................................................................ 17
5.3 Launch the VCA5807 GUI ....................................................................................... 17
Appendix A Bill of Materials (BOM) ........................................................................................... 18
Appendix B PCB Layout and Schematics ................................................................................... 22
List of Figures
1 VCA5807EVM Basic Configuration....................................................................................... 4
Pentium, Celeron are registered trademarks of Intel.
Windows is a registered trademark of Microsoft Corporation.
SLOU352–November 2012 VCA5807 Development Guide
Submit Documentation Feedback
Copyright © 2012, Texas Instruments Incorporated
1
www.ti.com
2 Introduction Tab of the VCA5807EVM GUI ............................................................................. 6
3 Hardware/Power/RST Tab of the VCA5807EVM GUI ................................................................. 7
4 VCA LNA+VCA+PGA+LPF Tab of the VCA5807EVM GUI........................................................... 8
5 VCA CW Mode Tab......................................................................................................... 9
6 VCA Debugging/Recording Tab......................................................................................... 10
7 HW Setup................................................................................................................... 11
8 PCB Layout With Jumper Positions..................................................................................... 12
9 CW Mode Hardware Configuration...................................................................................... 14
10 Switching to CW Mode ................................................................................................... 15
11 Oscilloscope................................................................................................................ 16
12 Top Layer - Signal......................................................................................................... 22
13 Second Layer - Ground................................................................................................... 23
14 Third Layer - Power....................................................................................................... 24
15 Fourth Layer - Signal...................................................................................................... 25
16 Fifth Layer - Ground....................................................................................................... 26
17 Bottom Layer - Signal..................................................................................................... 27
18 Schematic 1 of 10 ......................................................................................................... 28
19 Schematic 2 of 10 ......................................................................................................... 29
20 Schematic 3 of 10 ......................................................................................................... 30
21 Schematic 4 of 10 ......................................................................................................... 31
22 Schematic 5 of 10 ......................................................................................................... 32
23 Schematic 6 of 10 ......................................................................................................... 33
24 Schematic 7 of 10 ......................................................................................................... 34
25 Schematic 8 of 10 ......................................................................................................... 35
26 Schematic 9 of 10 ......................................................................................................... 36
27 Schematic 10 of 10........................................................................................................ 37
List of Tables
1 Related Document.......................................................................................................... 1
2 Power Table................................................................................................................ 13
3 Bill of Materials............................................................................................................. 18
2
VCA5807 Development Guide SLOU352–November 2012
Copyright © 2012, Texas Instruments Incorporated
Submit Documentation Feedback
www.ti.com
1 VCA5807 Overview
1.1 Important Disclaimer Information
The VCA5807EVM is intended for feasibility and evaluation testing only in
laboratory and development environments. This product is not for diagnostic
use.
Use the VCA5807 only under the following conditions:
• The VCA5807EVM is intended only for electrical evaluation of the features of the VCA5807 device in a
laboratory, simulation, or development environment.
• The VCA5807EVM is not intended for direct interface with a patient, or patient diagnostics.
• The VCA5807EVM is intended only for development purposes. It is not intended to be used as all or
part of an end-equipment application.
• The VCA5807EVM should be used only by qualified engineers and technicians who are familiar with
the risks associated with handling electrical and mechanical components, systems, and subsystems.
• The user is responsible for the safety of themself, fellow employees, contractors, and coworkers when
using or handling the VCA5807EVM. Furthermore, the user is fully responsible for the contact interface
between the human body and electronics; consequently, the user is responsible for preventing
electrical hazards such as shock, electrostatic discharge, and electrical overstress of electric circuit
components.
VCA5807 Overview
CAUTION
2 Overview
2.1 Introduction
This document is intended as a step-by-step guide through the VCA5807 Evaluation Module (EVM) setup
and test. The EVM is shipped with a default configuration from the manufacturer. With this configuration,
the onboard CMOS clock is used for an analog-to-digital converter sampling clock; the onboard oscillator
is used for CW mode operation. No external clock generator is required. The input signal for measurement
from a signal generator must be provided.
A detailed explanation regarding the jumpers, connectors, and test points appears in Section 2.2. The
graphical user interface (GUI) is available from the TI Web Site. Go to the software section of the product
folder (VCA5807).
Throughout this document, the abbreviation EVM and the term evaluation module are synonymous with
the VCA5807EVM.
SLOU352–November 2012 VCA5807 Development Guide
Submit Documentation Feedback
Copyright © 2012, Texas Instruments Incorporated
3
Overview
2.2 Default Configuration
Figure 1 shows the default configuration of the EVM from the factory. The accompanying list identifies the
basic components on the EVM board.
www.ti.com
Figure 1. VCA5807EVM Basic Configuration
1. P1 – Power supplies connector
2. JP2, and JP3 are set to enable 3.3-V and 5-V power supplies to the device
3. JP15: Enables onboard VCNT
4. P17: Disables PDB_Global
5. P15: Chooses the device Common Mode for the I/V Amp Common Mode
6. P16: Chooses Vss as –5 V for low-side power supply on I/V Amp
4
VCA5807 Development Guide SLOU352–November 2012
Copyright © 2012, Texas Instruments Incorporated
Submit Documentation Feedback
www.ti.com
3 Software Installation and Operation
3.1 Minimum Requirements
Before installing the software, verify that your PC meets the minimum requirements outlined in this
section.
3.1.1 Required Setup for VCA5807EVM GUI Software
• PC-compatible computer
• Pentium®III or Celeron®processor, 866 MHz or equivalent
• Minimum 256 MB of RAM (512 MB or greater recommended)
• Hard disk drive with at least 200 MB free space
• Windows®XP operating system with SP2, or Windows 7 operating system
• 1280 × 1024 or greater display screen resolution
• Mouse or other pointing device
• Available USB input
3.1.2 Additional Requirements for Use with Hardware
• VCA5807EVM
• USB cable
• Power supply to supply ±5 V
Software Installation and Operation
3.2 Installing the Software (PC Application)
The GUI software to evaluate the VCA5807 device is available at the Texas Instruments web site at
www.ti.com (VCA5807).
Before installing the software, make sure the VCA5807EVM is not connected to the PC. If using a
machine with Windows 7, it is recommended to have administrator rights to avoid problems during
installation.
Unzip the installer file to a temporary directory, and then double click setup.exe from the directory. The
installation creates a program menu item to execute the software.
Windows should automatically install the correct device drivers, but if there are problems installing the
device drivers please refer to this e2e post.
http://e2e.ti.com/support/other_analog/imaging_afes/f/239/p/213841/754871.aspx#754871
Follow these directions to ensure proper installation of the PC application.
SLOU352–November 2012 VCA5807 Development Guide
Submit Documentation Feedback
Copyright © 2012, Texas Instruments Incorporated
5
Software Installation and Operation
3.3 GUI Overview
Every tab in the VCA5807EVM GUI has a software reset option available by clicking the Software Reset
button located at the bottom right of the GUI.
The VCA Introduction tab: This tab gives a block diagram of the VCA5807 device.
www.ti.com
Figure 2. Introduction Tab of the VCA5807EVM GUI
6
VCA5807 Development Guide SLOU352–November 2012
Copyright © 2012, Texas Instruments Incorporated
Submit Documentation Feedback
www.ti.com
The VCA HARDWARE/POWER/RST tab: This tab allows the execution of different power down options.
Software Installation and Operation
Figure 3. Hardware/Power/RST Tab of the VCA5807EVM GUI
SLOU352–November 2012 VCA5807 Development Guide
Submit Documentation Feedback
Copyright © 2012, Texas Instruments Incorporated
7
Software Installation and Operation
The VCA LNA+VCA+PGA+LPF tab: The settings of the Low Noise Amplifier (LNA), VCA, Programmable
Gain Amplifier (PGA), and the Low Pass Filter (LPF) are adjusted in this tab.
• LNA: Adjusts the gain of each channel, adjust the active termination resistors, and disable the LNA
offset Integrator
• VCA: Adjusts the digital Time Gain Control (TGC) Attenuator
• PGA: Adjusts the PGA gain, Clamp Level, and disable both the overload clamp and the offset
integrator
• LPF: Adjusts the LPF frequency
www.ti.com
Figure 4. VCA LNA+VCA+PGA+LPF Tab of the VCA5807EVM GUI
8
VCA5807 Development Guide SLOU352–November 2012
Copyright © 2012, Texas Instruments Incorporated
Submit Documentation Feedback
www.ti.com
The VCA CW Mode tab: The Continuous-wave (CW) Doppler mode is adjusted in this tab as well as the
phases of each CW channel (1-8), the CW CLK, and the feedback resistors to control the gain. CH7 and
CH8 are brought to the CW pins by using the PGA Test Mode.
Software Installation and Operation
Figure 5. VCA CW Mode Tab
SLOU352–November 2012 VCA5807 Development Guide
Submit Documentation Feedback
Copyright © 2012, Texas Instruments Incorporated
9
Software Installation and Operation
The VCA Debugging/Recording tab: Command executions are saved to a file in this tab. The file can be
played back at any time by clicking on the Exec CMD File button. This tab also displays the Write Status,
and the ability to see the digital waveform of the SCLK, SDATA, and SEN pins.
www.ti.com
Figure 6. VCA Debugging/Recording Tab
10
VCA5807 Development Guide SLOU352–November 2012
Copyright © 2012, Texas Instruments Incorporated
Submit Documentation Feedback
www.ti.com
4 Hardware
4.1 Introduction
The following illustration shows the setup of the VCA5807EVM and external connectors. For the default
configuration as shown in Figure 1, it is unnecessary to have an external sampling clock and external
Vcntl supply. The onboard CMOS clock and onboard Vcntl are used.
Hardware
Figure 7. HW Setup
SLOU352–November 2012 VCA5807 Development Guide
Submit Documentation Feedback
Copyright © 2012, Texas Instruments Incorporated
11
Hardware
4.2 Board Configuration
Power up the VCA5807EVM by applying +5 V and –5 V to the P1 connector. After power up is complete,
three green LEDs and three red LEDs (LED 41, LED42, and LED 43) are turned. Locations of LEDs are
shown in Figure 8.
www.ti.com
12
Figure 8. PCB Layout With Jumper Positions
VCA5807 Development Guide SLOU352–November 2012
Copyright © 2012, Texas Instruments Incorporated
Submit Documentation Feedback
Loading...