GENERAL DESCRIPTION

The AD9272 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 80 MSPS analog-todigital converter (ADC).

FEATURES

8 channels of LNA, VGA, AAF, and ADC

Low noise preamplifier (LNA)

Input-referred noise voltage = 0.75 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 80 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, 195 mW per channel at 12 bits/40 MSPS (TGC)

120 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

APPLICATIONS

Medical imaging/ultrasound

Automotive radar