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ADA8282 Arkusz danych(PDF) 1 Page - Analog Devices |
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ADA8282 Arkusz danych(HTML) 1 Page - Analog Devices |
1 / 27 page Radar Receive Path AFE: 6-Channel LNA/PGA/AAF with ADC Data Sheet AD8283 Rev. C Document Feedback Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibilityis assumedbyAnalogDevicesforitsuse,norforanyinfringementsof patentsorother rightsofthirdpartiesthatmayresultfromitsuse.Specificationssubjecttochangewithoutnotice.No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781.329.4700 ©2011–2015 Analog Devices, Inc. All rights reserved. Technical Support www.analog.com FEATURES 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 72 MSPS SNR = 67 dB SFDR = 68 dB Low power, 170 mW per channel at 12 bits/72 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°C to +105°C Qualified for automotive applications APPLICATIONS Automotive radar Adaptive cruise control Collision avoidance Blind spot detection Self-parking Electronic bumper FUNCTIONAL BLOCK DIAGRAM REFERENCE SPI INA+ INA– INB+ INC+ INC– INB– IND+ IND– INE+ INE– INF+ INF– 12-BIT ADC DSYNC D[0:11] AAF AD8283 AAF AAF AAF AAF AAF DRV PGA LNA PGA LNA PGA LNA PGA LNA PGA LNA PGA LNA INADC+ INADC– MUX Figure 1. GENERAL DESCRIPTION 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 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 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°C to +105°C. Table 1. Related Devices Part No. Description AD8285 4-Channel LNA/PGA/AAF, pseudosimultaneous channel sampling with ADC AD8284 4-Channel LNA/PGA/AAF, sequential channel sampling with ADC ADA8282 4-Channel LNA/PGA |
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