This demonstration circuit allows the user to evaluate the LTC®1564 digitally controlled antialiasing filter. The cutoff frequency (fC) and passband gain are fully programmable while the shape of the lowpass response is fixed. A latching digital interface stores fC and gain settings or it can be bypassed for control directly from the pins through either the on-board toggle switches or using the optional connector to control the pins externally. The LTC1564 operates from 2.7V to 10V total supply voltage (single or split supplies) and comes in a 16 pin surface mount SSOP. This board demonstrates proper layout, bypassing and optional buffering to achieve best performance. Applications include DSP antialiasing and reconstruction filtering, communications and instruments with high dynamic range, up to 20 bits, and sampling rates to 300+ kilosamples per second.