●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
