AD8285 Radar Receive Path AFE: 4-Channel LNA/PGA/AAF with ADC
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
Features and Benefits- 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 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 - Low power: 185 mW per channel at 12 bits and 72 MSPS
- Low noise: 3.5 nV/√Hz maximum of input referred voltage noise
- See data sheet for additional features
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Data Sheets
Order Information
| Part Number | Package | Packing Qty | Temp Range | Price 100-499 | Price 1000+ | RoHS |
|---|
| AD8285WBCPZ Production | 72 ld LFCSP (10x10mm, 8.5mm exposed pad) | OTH 168 | -40 to 105C | 8.75 | 8.33 | Y |
| AD8285WBCPZ-RL Production | 72 ld LFCSP (10x10mm, 8.5mm exposed pad) | REEL 2000 | -40 to 105C | 8.75 | 8.33 | Y |
Evaluation Boards
| Part Number | Description | Price | RoHS |
|---|
| AD8283CP-EBZ | 6 Channel 72 Lead LFCSP Evaluation Board | 750 | Y |
| AD8285CP-EBZ | 4 Channel 72 Lead LFCSP Evaluation Board | 750 | Y |
