Datasheet

User's Guide
SLWU058 August 2008
Voltage-Controlled Amplifier Evaluation Kit
The TSW7001 is an evaluation module that demonstrates an ultra-wideband, high-performance,
voltage-controllable gain stage with 40 dB of voltage-controlled gain (nominal gain of 100). The
demonstration kit includes an optional path for an onboard OPA656 transimpedance input stage, a 16-bit
precision voltage DAC8831 to implement the gain control voltage, and the VCA824 ultra-wideband,
voltage-controlled amplifier. Also onboard are linear regulators to provide the voltages necessary for the
amplifier circuits and a precision 1.2-V reference for the control voltage digital-to-analog converter (DAC).
Control of the board is achieved through a USB interface and GUI software. This allows a personal
computer to control the gain of the VCA824 without the need for extra signal generators. The control
levels can be static voltage levels or dynamically changing waveforms, both selectable from the GUI.
Figure 1. TSW7001EVM
Contents
1 TSW7001EVM Configuration Options .................................................................................... 2
2 Block Diagrams .............................................................................................................. 3
3 Key Texas Instruments Components ..................................................................................... 3
4 Software Installation ......................................................................................................... 4
5 Software ....................................................................................................................... 4
6 TSW7001 EVM Introduction .............................................................................................. 11
7 Demonstration Kit Test Configuration ................................................................................... 12
8 Initial Power Up and Test ................................................................................................. 14
9 Optional Configurations.................................................................................................... 14
10 Bill of Materials and Schematics ......................................................................................... 16
11 References .................................................................................................................. 21
List of Figures
SLWU058 August 2008 Voltage-Controlled Amplifier Evaluation Kit 1
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