Analog Devices Inc. AD9271BSVZ-40

Description
The AD9271 is an octal LNA/VGA/AAF/ADC with crosspoint switch 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).
Each channel features a variable gain range of 30 dB, a fully differential signal path, an active input preamplifier termination, a maximum gain of up to 40 dB, and an ADC with a conversion rate of up to 50 MSPS. The channel is optimized for dynamic performance and low power in applications where a small package size is critical.

Features
8 channels of LNA, VGA, AAF, and ADC
Low noise preamplifier (LNA)
Input-referred noise = 1.1 nV/√Hz @ 5 MHz typical, gain 18 dB
SPI-programmable gain 14 dB/15.6 dB/18 dB
Single-ended input; V maximum = 400 mV p-p/333 mV p-p/250 mV p-p
Dual-mode active input impedance matching
Bandwidth (BW) > 70 MHz
Full-scale (FS) output = 2 Vp-p differential
Variable gain amplifier (VGA)
Gain range -6 dB to 24 dB
Linear-in-dB gain control
Antialiasing filter (AAF)
3-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 per channel at 12 bits/40 MSPS (TGC)
90 mW per channel in CW Doppler
Flexible power-down modes
Overload recovery in <10 ns
Single 1.8 V supply (3.3 V supply for CW Doppler output bias)
Fast recovery from low power standby mode, <2 μs
100-lead TQFP

Applications
Medical imaging/ultrasound
Automotive radar