Tuned in for action with digitally tuneable filter

“The ADMV8818 is a fully monolithic microwave integrated circuit (MMIC), with a digitally selectable frequency of operation, offering a space-efficient alternative to large, switched filter banks and cavity-tuned filters,” says Mouser Electronics.

Said to be ideal for industrial instrumentation and measurement, aerospace, defence and medical applications, the filter provides a dynamically adjustable solution for advanced communications applications.

The ADMV8818 from Analog Devices, available from Mouser, features four independently controlled high-pass filters and four independently controlled low-pass filters that span the 2 GHz to 18 GHz frequency range. The flexible architecture of the ADMV8818 allows the 3 dB cut-off frequency (f3dB) of the high- and low-pass filters to be controlled independently to generate up to 4 GHz of bandwidth.

Evaluation board with ADMV8818 chip

Also available from Mouser, the ADMV8818-EVALZ evaluation board incorporates the ADMV8818 chip, as well as a negative voltage generator, low-dropout (LDO) regulators and an interface to the EVAL-SDP-CS1Z (SDP-S) system demonstration platform (SDP) to allow simple and efficient evaluation.

The negative voltage generator and LDO regulators allow the ADMV8818 to be powered by either the 5 V USB supply voltage from the PC via the SDP-S or two external power supplies. The SDP-S controller enables the user to interface with the ADMV8818 SPI through the ADI Analysis|Control|Evaluation (ACE) software.