# AD9273 - Octal LNA/VGA/AAF/ADC and Crosspoint Switch

## Features

· Channels: 8 channels of LNA, VGA, AAF, and ADC
· LNA:
* Input-referred noise voltage: 1.2 nV/√Hz (gain = 21.3 dB) @ 5 MHz
* 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
· VGA:
* Attenuator range: −42 dB to 0 dB
* Programmable PGA gain: 21 dB / 24 dB / 27 dB / 30 dB
* Linear-in-dB gain control
· AAF:
* Programmable 2nd-order low-pass filter (LPF): 8 MHz to 18 MHz
* Programmable high-pass filter (HPF)
· ADC:
* 12 bits at 10 MSPS to 50 MSPS
* SNR = 70 dB
* SFDR = 75 dB
· Switch: 8 × 8 differential crosspoint switch
· Power:
* 109 mW per channel @ 12 bits/40 MSPS (TGC)
* 70 mW per channel in CW Doppler
· Other:
* Overload recovery: <10 ns
* Fast recovery from standby: <2 μs
* 100-lead TQFP

## Applications

· Medical imaging/ultrasound
· Automotive radar

## General Description

· Low cost, low power, small size, ease of use
· Contains eight channels of:
* LNA with VGA
* AAF
* 12-bit ADC (10 MSPS to 50 MSPS)
· Variable gain range: 42 dB
· Fully differential signal path
· Active input preamplifier termination
· Maximum gain: up to 52 dB

## Functional Block Diagram

· Includes LNA, VGA, AAF, ADC, and serial LVDS outputs
· Crosspoint switch enables CW Doppler functionality
· SPI programming for gain, filter settings, and switch control

## Notes

· Information furnished by Analog Devices is believed to be accurate and reliable.
· Trademarks and registered trademarks are the property of their respective owners.