This section demonstrates the use of the device in a reconfigurable oscilloscope. The device is ideally suited for oscilloscope applications. The ability to tradeoff channel count and sampling speed allows designers to build flexible hardware to meet multiple needs. This flexibility saves development time and cost, allows hardware reuse for various projects and enables software upgrade paths for additional functionality. This section describes an oscilloscope that can operate as a dual-channel oscilloscope running at 5 GSPS or can be reconfigured through SPI programming as a single-channel, 10-GSPS oscilloscope. A reconfigurable setup allows users to trade off the number of channels and the sampling rate of the oscilloscope as needed without changing the hardware. Set the input bandwidth to the desired maximum signal bandwidth through the use of an antialiasing, low-pass filter. Digital filtering can then be used to reconfigure the analog bandwidth as required. For instance, the maximum bandwidth can be set to 2 GHz for use during pulsed transient detection and then reconfigured to 100 MHz through digital filtering for low-noise, power-supply ripple observation. Figure 7-2 shows the application block diagram.

Figure 7-2 Typical Configuration for Reconfigurable Oscilloscope