Radar Receive Path AFE: 4-Channel Mux
with LNA, PGA, AAF, and ADC
Data Sheet
AD8284
FEATURES
FUNCTIONAL BLOCK DIAGRAM
4-channel mux to LNA, PGA, AAF
1 direct-to-ADC channel
Programmable gain amplifier (PGA)
Includes low noise preamplifier (LNA)
SPI-programmable gain = 17 dB to 35 dB in 6 dB steps
Antialiasing filter (AAF)
Programmable third-order low-pass elliptic filter (LPF) from
9 MHz to 15 MHz
Analog-to-digital converter (ADC)
12 bits of accuracy of up to 60 MSPS
SNR = 67 dB
REFERENCE
INA+
INA–
AD8284
SATURATION
DETECTION
INB+
INB–
MUX
LNA
PGA
AAF
INC+
INC–
SFDR = 68 dBc
D0
TO
D11
12-BIT
ADC
MUX
Low power, 345 mW at 12 bits per 60 MSPS
Low noise, 3.5 nV/√Hz maximum of input referred
voltage noise
IND+
IND–
INADC+
INADC–
Power-down mode
64-lead, 10 mm × 10 mm TQFP package
Specified from −40°C to +105°C
Qualified for automotive applications
SPI
APPLICATIONS
Automotive radar
Adaptive cruise control
Collision avoidance
Blind spot detection
Self parking
Figure 1.
Electronic bumper
GENERAL DESCRIPTION
The AD8284 is an integrated analog front end designed for low
cost, compact size, flexibility, and ease of use. It contains a
4-channel differential multiplexer (mux), a 1-channel low noise
preamplifier (LNA) with a programmable gain amplifier (PGA)
and an antialiasing filter (AAF), as well as one direct-to-ADC
channel, all integrated with a single, 12-bit analog-to-digital
converter (ADC). The AD8284 also incorporates a saturation
detection circuit for high frequency overvoltage conditions that
would otherwise be filtered by the AAF.
for dynamic performance and low power in applications where
a small package size is critical.
Fabricated in an advanced CMOS process, the AD8284 is available
in a 10 mm × 10 mm, RoHS compliant, 64-lead TQFP. It is speci-
fied over the automotive temperature range of −40°C to +105°C.
Table 1. Related Devices
Part No.
Description
AD8285
4-Channel LNA/PGA/AAF, pseudosimultaneous
channel sampling with ADC
The analog channel features a gain range of 17 dB to 35 dB in
6 dB increments, and an ADC with a conversion rate of up to
60 MSPS. The combined input referred voltage noise of the entire
channel is 3.5 nV/√Hz at maximum gain. The channel is optimized
AD8283
6-Channel LNA/PGA/AAF, pseudosimultaneous
channel sampling with ADC
ADA8282 4-Channel LNA/PGA
Rev. D
Document Feedback
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
rightsof third parties that may result fromits use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarks andregisteredtrademarks are the property of their respective owners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700 ©2012–2015 Analog Devices, Inc. All rights reserved.
Technical Support
www.analog.com
5秒后页面跳转
全球首块英伟达H200交付 黄仁勋“送货上门”
常用8脚开关电源芯片型号大全
74HC04芯片引脚图及功能、应用电路图讲解
CR6842芯片参数、引脚配置、应用电路图详解
微信公众号
抖音公众号
浙公网安备 33010502006866号 浙ICP备10014259号-119
营业执照ICP证
数据手册
如果您发现信息不准确，
