The AD8335 is a quad variable gain amplifier (VGA) with low noise preamplifier intended for cost and power sensitive applications. Each channel features a gain range of 48dB, fully differential signal paths, active input preamplifier matching and user-selectable maximum gains of 46dB and 38dB. Individual gain controls are provided for each channel.

Assumes a 20MHz noise bandwidth (NBW), the Nyquist frequency for a 40MHz ADC, the input SNR is 92dB. The HLxx pin optimizes the output SNR for 10-bit and 12-bit ADCs with 1 V p-p or 2 V p-p full-scale (FS) inputs.

Channel 1 and Channel 2 are enabled through the EN12 pin and channel 3 and channel 4 are enabled through the EN34 pin. For VGA only applications, the PrAs can be powered down, significantly reducing power consumption.