ADIAD8283汽车雷达接收模拟前端(AFE)解决方案

ADIAD8283汽车雷达接收模拟前端（AFE）解决方案

ADI 公司的AD8283带ADC的汽车雷达接收模拟前端（AFE），包括了六路低噪音放大器（LNA），可编增益放大器（PGA）和抗混淆滤波器（AAF）以及一路12位ADC。每路的增益通过SPI编程，增益从16dB到34dB，每步为6dB，输入参考噪音电压在最大增益时为3.5 nV/√Hz，SNR = 67 dB 和SFDR = 68 dB，主要用在汽车雷达，自适应碰撞控制，防止空中相撞，盲点检测，自停车和电子缓冲器。本文介绍了AD8283主要特性，功能方框图，雷达系统方框图以及差分输入和单端输入的应用电路图。Radar Receive Path AFE: 6-Channel LNA/PGA/AAF with ADCThe 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℃ to +105℃.AD8283主要特性：6 channels of LNA, PGA, AAF1 channel of direct-to-ADCProgrammable gain amplifier (PGA)Includes low noise preamplifier (LNA)SPI-programmable gain = 16 dB to 34 dB in 6 dB stepsAntialiasing filter (AAF)Programmable third-order low-pass elliptic filter (LPF) from 1 MHz to 12 MHzAnalog-to-digital converter (ADC)12 bits of accuracy up to 80 MSPSSNR = 67 dBSFDR = 68 dBLow power, 170 mW per channel at 12 bits/80 MSPSLow noise, 3.5 nV/√Hz maximum of input referred voltage noisePower-down mode72-lead, 10 mm × 10 mm, LFCSP packageSpecified from −40℃ to +105℃Qualified for automotive applicationsAD8283应用：Automotive radarAdaptive cruise controlCollision avoidanceBlind spot detectionSelf-parkingElectronic bumper图1。AD8283方框图图2。雷达系统方框图图3。AD8283单路简化方框图图4。AD8283差分输入应用电路图图5。AD8283单端输入应用电路图详情请见：/static/imported-files/data_sheets/AD8283.pdf