Data Sheet

ADMV8809

0.5GHz to 9GHz, Digitally Tunable, High-Pass Filters and Low-Pass Filters

Rev. 0

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FEATURES

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Digitally tunable, high-pass and low-pass tuning

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Suboctave bandwidths with additional user adjustability

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Rejection: 40dB

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Single-chip replacement for discrete filter banks

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Compact, 8mm × 8mm × 1.07mm LGA package

APPLICATIONS

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Land mobile radios

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Test and measurement equipment

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Military radars, electronic warfare, and electronic countermeas-

ures

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Satellite communications

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Industrial and medical equipment

GENERAL DESCRIPTION

The ADMV8809 is a fully monolithic microwave IC (MMIC) that

features digitally selectable operating frequencies. The device fea-

tures four independently controlled high-pass filters (HPFs) and

low-pass filters (LPFs) that span the 0.5GHz to 9GHz frequency

range (fCENTER).

The flexible architecture of the ADMV8809 allows the 3dB cutoff

frequency (f3dB) of the high-pass and low-pass filters to be control-

led independently. The digital logic control on each filter is 3-bits

wide (eight states) and controls the on-chip reactive elements to

adjust the f3dB. The typical insertion loss is <6.2dB. When using the

HPF = LPF state, the filter has 40dB rejection for the low side at 0.5

× fU3dB and for the high side at 2 × fL3dB, which is ideally suited for

minimizing system second-order intercept (IP2) and harmonics.

This tunable filter can be used as a smaller alternative to large

switched filter banks and discrete component-based tunable filters,

and the ADMV8809 provides a dynamically adjustable solution in

advanced communications applications.

FUNCTIONAL BLOCK DIAGRAM

Figure 1. Functional Block Diagram