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AD8284 Datasheet 4-Channel Mux

Manufacturer: Analog Devices

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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.

Overview

Data Sheet Radar Receive Path AFE: 4-Channel Mux with LNA, PGA, AAF, and ADC.

Key Features

  • 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 SFDR = 68 dBc Low power, 345 mW at 12 bits per 60 MSPS Low noise, 3.5 nV/√Hz maximum of input referred voltage noise Power-down mode 6.

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