AD8285 Radar Receive Path AFE Analog Devices Inc. AD8285 Radar Receive Path Analog Front End (AFE) features four channels of a low noise preamplifier (LNA) with a programmable gain amplifier (PGA) and an anti-aliasing filter (AAF) plus one direct-to-ADC channel, all integrated with a single 12-bit analog-to-digital converter (ADC). Each channel features a gain range of 16dB to 34dB in 6dB increments and an ADC with a conversion rate of up to 72MSPS.