BL2600 power supply noise


I’m using a BL2600 in an embedded application, where I use one of the D/A outputs to set the gain of a linear amplifier. The problem is that the switching regulator on the Rabbit board is placed close to the analog circuitry, and switching noise is being coupled into the D/A outputs, and is appearing at the output of my amplifier. I’m tempted to modify the board to bypass the switching regulator, and supply +5 directly. Anyone have any experience like this, or other suggestions? Thanks.