●GENERAL DESCRIPTION
●The AD9271 is designed for low cost, low power, small size, and ease of use. It contains eight channels of a variable gain amplifier (VGA) with low noise preamplifier (LNA); an antialiasing filter (AAF); and a 12-bit, 10 MSPS to 50 MSPS analog-to-digital converter (ADC).
●FEATURES
●8 channels of LNA, VGA, AAF, and ADC
●Low noise preamplifier (LNA)
● Input-referred noise = 1.2 nV/√Hz @ 7.5 MHz typical
● SPI-programmable gain = 14 dB/15.6 dB/18 dB
● Single-ended input; VINmaximum = 400 mV p-p/333 mV p-p/250 mV p-p
● Dual mode, active input impedance match
● Bandwidth (BW) > 70 MHz
● Full-scale (FS) output = 2 V p-p diff
●Variable gain amplifier (VGA)
● Gain range = −6 dB to +24 dB
● Linear-in-dB gain control
●Antialiasing filter (AAF)
● 3rd-order Butterworth cutoff
● Programmable from 8 MHz to 18 MHz
●Analog-to-digital converter (ADC)
● 12 bits at 10 MSPS to 50 MSPS
● SNR = 70 dB
● SFDR = 80 dB
● Serial LVDS (ANSI-644, IEEE 1596.3 reduced range link)
● Data and frame clock outputs
●Includes crosspoint switch to support
● continuous wave (CW) Doppler
●Low power, 150 mW/channel at 12 bits/40 MSPS (TGC)
●60 mW/channel in CW Doppler
●Single 1.8 V supply (3.3 V supply for CW Doppler output bias)
●Flexible power-down modes
●Overload recovery in <10 ns
●Fast recovery from low power standby mode, <2 μs
●100-pin TQFP
