MAX2066

19-4057; Rev 0; 3/08 www.DataSheet4U.com 50MHz to 1000MHz High-Linearity, Serial/Parallel-Controlled Digital VGA General Description The MAX2066 high-linearity digital variable-gain amplifier (VGA) is a monolithic SiGe BiCMOS attenuator and amplifier designed to interface with 50Ω systems operating in the 50MHz to 1000MHz frequency range (See the Typical Application Circuit). The digital attenuator is controlled as a slave peripheral using either the SPI™compatible interface or a parallel bus with 31dB total adjustment range in 1dB steps. An added feature allows “rapid-fire” gain selection between each of four steps, preprogrammed by the user through the SPIcompatible interface. The 2-pin control allows the user to quickly access any one of four customized attenuation states without reprogramming the SPI bus. Because each stage has its own RF input and RF output, this component can be configured to either optimize NF (amplifier configured first), or OIP3 (amplifier last). The device’s performance features include 22dB amplifier gain (amplifier only), 5.2dB NF at maximum gain (includes attenuator insertion loss), and a high OIP3 level of +42.4dBm. Each of these features makes the MAX2066 an ideal VGA for numerous receiver and transmitter applications. In addition, the MAX2066 operates from a single +5V supply with full performance, or a single +3.3V supply with slightly reduced performance, and has an adjustable bias to trade current consumption for linearity performance. Th...