ADMV8818

Data Sheet 2 GHz to 18 GHz, Digitally Tunable, High-Pass and Low-Pass Filter ADMV8818 FEATURES GENERAL DESCRIPTION Digitally tunable, multioctave, high-pass and low-pass tuning Independent 3 dB frequency control for up to 4 GHz of bandwidth Optimal wideband rejection: 35 dB Single chip replacement for discrete filter banks Compact 9 mm × 9 mm, 56-terminal LGA package APPLICATIONS Test and measurement equipment Military radar, electronic warfare, and electronic countermeasures Satellite communications and space Industrial and medical equipment The ADMV8818 is a fully monolithic microwave integrated circuit (MMIC) that features a digitally selectable frequency of operation. The device features four independently controlled highpass filters (HPFs) and four independently controlled low-pass filters (LPFs) that span the 2 GHz to 18 GHz frequency range. The flexible architecture of the ADMV8818 allows the 3 dB cutoff frequency (f3dB) of the high-pass and low-pass filters to be controlled independently to generate up to 4 GHz of bandwidth. The digital logic control on each filter is 4 bits wide (16 states) and controls the on-chip reactive elements to adjust the f3dB. The typical insertion loss is 9 dB, and the wideband rejection is 35 dB, which is ideally suited for minimizing system harmonics. This tunable filter can be used as a smaller alternative to large switched filter banks and cavity tuned filters, and this device provides a dynamically adjustable solution in advanced ...