Analog Devices Inc. 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.
The combined input referred noise voltage of the entire channel is 3.5nV/√Hz at maximum gain. The channel is optimized for dynamic performance and low power in applications where a small package size is critical such as the automotive radar in adaptive cruise control, collision avoidance, blind spot detection, self parking, and electronic bumpers.
Features
- 4 channel LNA, PGA, and AAF
- 1 direct-to-ADC channel
- Programmable gain amplifier (PGA)
- Includes low noise preamplifier (LNA)
- Serial peripheral interface (SPI) programmable gain 16dB to 34dB in 6dB steps
- Anti-aliasing filter (AAF)
- Programmable third-order, low-pass elliptic filter (LPF) from 1.0MHz to 12.0MHz
- Analog-to-digital converter (ADC)
- 12 bits of accuracy up to 72MSPS
- 68.5dB Signal-to-noise ratio (SNR)
- 68dB at gain =16dB Spurious-free dynamic range (SFDR)
- Low power of 185mW per channel at 12bits and 72MSPS
- Low noise of 3.5nV/√Hz maximum of input referred voltage noise
Applications
- Automotive radar
- Adaptive cruise control
- Collision avoidance
- Blind spot detection
- Self parking
- Electronic bumpers
Functional Block Diagram
Published: 2014-11-18
| Updated: 2022-03-11