Maxim Integrated 500MHz to 4000MHz Dual Analog Voltage Variable Attenuator with On-Chip 10-Bit SPI-Controlled DAC MAX19792

The MAX19792 dual general-purpose analog voltage variable attenuator (VVA) is designed to interface with 50ω systems operating in the 500MHz to 4000MHz frequency range. The device includes a patented control circuit that provides 23.2dB of attenuation range with a typical linear control slope of 8.5dB/V. Both attenuators share a common analog control and can be cascaded together to yield 46.4dB of total attenuation range with a typical combined linear control slope of 17dB/V (5V operation). Alternatively, the on-chip 4-wire SPI-controlled 10-bit DAC can be used to control both attenuators. In addition, a step-up/down feature allows user-programmable attenuator stepping through command pulses without reprogramming the SPI interface. The MAX19792 is a monolithic device designed using one of Maxim's proprietary SiGe BiCMOS processes. The part operates from a single +5V supply or alternatively from a single +3.3V supply. It is available in a compact 36-pin TQFN package (6mm x 6mm x 0.8mm) with an exposed pad. Electrical performance is guaranteed over the -40°C to +100°C extended temperature range.