User's Guide
SLOU216 – January 2008
VCA8500BOARD
The Texas Instruments VCA8500BOARD evaluation module makes it easy to evaluate the performance of
the TI VCA8500 variable gain amplifier. This user's guide provides a description of the evaluation module
and its operation, schematic diagram, bill of materials, and the printed-circuit board layout.
Contents
1
2
Initial Configuration
2.1
Power Supply
3
3.1
Input Signals
3.2
Output Signals
3.3
TGC Outputs
3.4
CW Outputs
4
5
Modes of Operation
5.1
Default-Power-Up Mode
...........................................................................................
5.2
PC Control Mode
...................................................................................................
5.3
Direct Control Mode
................................................................................................
6
VCA8500BOARD Full-Access Software
..................................................................................
6.1
Loading the Software
...............................................................................................
6.2
Initial Start-up Screen
..............................................................................................
6.3
Other Program Functions
..........................................................................................
7
Printed-Circuit Board Layout, Bill of Materials, and Schematic
........................................................
7.1
Printed-Circuit Board Layout
......................................................................................
7.2
Bill of Materials
....................................................................................................
7.3
Schematic
List of Figures
1
CW Output Circuit
2
Initial Start-up Screen
3
Main Program Window
4
CW Options Selection
5
Silkscreen — Top Layer
....................................................................................................
6
Ground
7
Power Plane 1
8
Power Plane 2
9
Ground
10
Silkscreen — Bottom Layer
...............................................................................................
List of Tables
1
Bill of Materials
Windows is a trademark of Microsoft Corporation.
SLOU216 – January 2008
VCA8500BOARD
1
