ADI 公司的AD8283帶ADC的汽車(chē)?yán)走_(dá)接收模擬前端（AFE），包括了六路低噪音放大器（LNA），可編增益放大器（PGA）和抗混淆濾波器（AAF）以及一路12位ADC。每路的增益通過(guò)SPI編程，增益從16dB到34dB，每步為6dB，輸入?yún)⒖荚胍綦妷涸谧畲笤鲆鏁r(shí)為3.5 nV/√Hz，SNR = 67 dB 和SFDR = 68 dB，主要用在汽車(chē)?yán)走_(dá)，自適應(yīng)碰撞控制，防止空中相撞，盲點(diǎn)檢測(cè)，自停車(chē)和電子緩沖器。本文介紹了AD8283主要特性，功能方框圖，雷達(dá)系統(tǒng)方框圖以及差分輸入和單端輸入的應(yīng)用電路圖。

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應(yīng)用：

Automotive radar

Adaptive cruise control

Collision avoidance

Blind spot detection

Self-parking

Electronic bumper

圖1。AD8283方框圖

圖2。雷達(dá)系統(tǒng)方框圖

圖3。AD8283單路簡(jiǎn)化方框圖

圖4。AD8283差分輸入應(yīng)用電路圖

圖5。AD8283單端輸入應(yīng)用電路圖
詳情請(qǐng)見(jiàn)：
http://www.analog.com/static/imported-files/data_sheets/AD8283.pdf