ADI AD8283汽车雷达接收模拟前端（AFE）解决方案

发布时间：2011-5-31 12:53 发布者：Liming

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 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℃ to +105℃.

AD8283主要特性：

6 channels of LNA, PGA, AAF

1 channel of direct-to-ADC

Programmable gain amplifier (PGA)

Includes low noise preamplifier (LNA)

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 MHz to 12 MHz

Analog-to-digital converter (ADC)

12 bits of accuracy up to 80 MSPS

SNR = 67 dB

SFDR = 68 dB

Low power, 170 mW per channel at 12 bits/80 MSPS

Low noise, 3.5 nV/√Hz maximum of input referred voltage noise

Power-down mode

72-lead, 10 mm × 10 mm, LFCSP package

Specified from −40℃ to +105℃

Qualified for automotive applications

AD8283应用：

Automotive radar

Adaptive cruise control

Collision avoidance

Blind spot detection

Self-parking

Electronic bumper