ADMV8505 Digitally Tunable Band-Pass Filters

Analog Devices Inc. ADMV8505 Digitally Tunable Band-Pass Filters feature a digitally selectable frequency of operation. The filter center frequency (fCENTER) can be adjusted from 225MHz to 520MHz using an 8-bit value (256x states) incorporating a patented calibration technique. The typical 3dB bandwidth is 9%, and adjustability is ±2%. Insertion loss is typically 4.5dB, and the 20dB rejection is 19% away from the fCENTER, ideally suited for minimizing system interference. The ADMV8505 tunable filter can be used as a smaller alternative to large switched filter banks and discrete component-based tunable filters, providing a dynamically adjustable solution in advanced communications applications.