Demonstration board DC338 features the LTC1563 family of universal low pass filter building blocks. The LTC1563-2 and LTC1563-3 form a family of easy-to-use active RC low pass filters with rail-to-rail input and output operation and low DC offset. The parts are suitable for use in systems with resolutions of up to 16-bits. Demonstration board DC338A-A has the LTC1563-2 installed. The LTC1563-2 with six equal valued resistors gives a unity-gain Butter worth response. Demonstration board DC338A-B has the LTC1563-3 installed. The LTC1563-3 with six equal valued resistors gives a unity-gain Bessel response. The value of the six resistors sets the cutoff frequency for either filter and is calculated by this simple formula: R = 10k • (256kHz/fC); where fC is the desired cutoff frequency. By simply using different valued resistors, filters with gain and other response types are achieved. A specific gain (HO), fO and Q requirement is met with a unique set of three resistors. To design these filters use Linear Technology’s Filter CAD TM filter design software. Filter CAD is a powerful, yet easy to use, program available free of charge from the LTC website (www.linear-tech.com). It is also available on CD-ROM. This board is intended for use in evaluating simple, all pole low pass filters using the LTC1563 family of parts. The filter complexity ranges from 4th to 6th order. The reference designators on the board correspond directly with the schematics produced with Linear Technology’s Filter CAD filter design program. With Filter CAD, the design of filters is a simple process. With the LTC1563 and this demonstration board, filter evaluation and integration are also simple.