GENERAL DESCRIPTION
The AD9273 is designed for low cost, low power, small size, and ease of use. It contains eight channels of a low noise preamplifier (LNA) with a variable gain amplifier (VGA); 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 42 dB, a fully differential signal path, an active input preamplifier termination, a maximum gain of up to 52 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 voltage = 1.26 nV/√Hz (gain = 21.3 dB) @ 5 MHz typical
   SPI-programmable gain = 15.6 dB/17.9 dB/21.3 dB
   Single-ended input; VIN maximum = 733 mV p-p/550 mV p-p/367 mV p-p
   Dual-mode active input impedance matching
   Bandwidth (BW) > 100 MHz
   Full-scale (FS) output = 4.4 V p-p differential
Variable gain amplifier (VGA)
   Attenuator range = −42 dB to 0 dB
   SPI-programmable PGA gain = 21 dB/24 dB/27 dB/30 dB
   Linear-in-dB gain control
Antialiasing filter (AAF)
   Programmable 2nd-order low-pass filter (LPF) from 8 MHz to 18 MHz
   Programmable high-pass filter (HPF)
Analog-to-digital converter (ADC)
   12 bits at 10 MSPS to 50 MSPS
   SNR = 70 dB
   SFDR = 75 dB
   Serial LVDS (ANSI-644, IEEE 1596.3 reduced range link)
   Data and frame clock outputs
Includes an 8 × 8 differential crosspoint switch to support continuous wave (CW) Doppler
Low power, 109 mW per channel at 12 bits/40 MSPS (TGC)
70 mW per channel in CW Doppler
Flexible power-down modes
Overload recovery in <10 ns
Fast recovery from low power standby mode, <2 μs
100-lead TQFP and 144-ball BGA

APPLICATIONS
  Medical imaging/ultrasound
  Automotive radar