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Variable Gain Amplifiers

The 6-bit digital VGAs BGA7204 and BGA7210 offer high linearity (35 dBm@2.2-2.8 GHz) and high output power (23 dBm@2.2-2.8 GHz) across a large bandwidth without external matching. Smart routing with no connection crosses simplifies design and decreases footprint by 25%. The unique power-save mode can effectively reduce the current consumption in TDD systems up to 45%. The BGA7210 adds flexible current distribution across its two amplifiers, depending on the attenuation state, to save current.

The BGA735x are dual independently digitally controlled IF Variable Gain Amplifiers (VGA) operating from 50 MHz to 250 MHz. Each IF VGA amplifies within a gain range of 24 dB and 28 dB, respectively. At their maximum gain setting each delivers 18 dBm output power at 1 dB gain compression (P1dB) with superior linear performance and overdrive performance up to +20 dBm. The gain controls of each amplifier are separate digital gain-control, which is provided externally through two sets of 5 bits.