AD8285

RECOMMENDED FOR NEW DESIGNS

Radar Receive Path AFE: 4-Channel LNA/PGA/AAF with ADC

Analog Devices AD8285 Product Info

10 February 2026 5

Features

4-channel LNA, PGA, and AAF
Low power: 185 mW per channel at 12 bits and 72 MSPS
Programmable gain amplifier (PGA)
Includes low noise preamplifier (LNA)
Serial peripheral interface (SPI) programmable gain 16 dB to 34 dB in 6 dB steps
Antialiasing filter (AAF)
Programmable third order, low-pass elliptic filter (LPF) from 1.0 MHz to 12.0 MHz

Analog-to-digital converter (ADC)
12 bits of accuracy up to 72 MSPS
Signal-to-noise ratio (SNR): 68.5 dB
Spurious-free dynamic range (SFDR): 68 dB at gain = 16 dB
1 direct to ADC channel
Low noise: 3.5 nV/√Hz maximum of input referred voltage noise
See data sheet for additional features

Part details & applications

The AD8285 is designed for low cost, low power, compact size, flexibility, and ease of use. It contains four channels of a low noise preamplifier (LNA) with a programmable gain amplifier (PGA) and an antialiasing 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 16 dB to 34 dB in 6 dB increments and an ADC with a conversion rate of up to 72 MSPS. The combined input referred noise voltage of the entire channel is 3.5 nV/√Hz at maximum gain. The channel is optimized for dynamic performance and low power in applications where a small package size is critical.

Fabricated in an advanced complementary metal oxide semiconductor (CMOS) process, the AD8285 is available in a 10 mm × 10 mm, RoHS compliant, 72-lead LFCSP that is specified over the automotive temperature range of −40°C to +105°C.

APPLICATIONS

Automotive radar
Adaptive cruise control
Collision avoidance
Blind spot detection
Self parking
Electronic bumper

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