Radar Receive Path AFE: 6-Channel LNA/PGA/AAF with ADC

The AD8283 is designed for low cost, low power, compact size, flexibility, and ease of use. It contains six 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 80 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 CMOS process, the AD8283 is available in a 10 mm × 10 mm, RoHS-compliant, 72-lead LFCSP. It 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

* 6 channels of LNA, PGA, AAF

* 1 channel of direct-to-ADC

* Parallel 3.3V CMOS Output

* Programmable third-order low-pass elliptic filter (LPF) from

1 MHz to 12 MHz

* Precise channel-to-channel matching

Gain: ±0.5dB (-40 to 105°C)

Phase: ±5° (-40 to 105°C)