AD9273BSVZRL-40

模数转换器 - ADC 12-Bit 40 MSPS Octal

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