AD9273:  Octal LNA/VGA/AAF/ADC and Crosspoint Switch

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 ...More

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AD9273:  Octal LNA/VGA/AAF/ADC and Crosspoint Switch

Product 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.

The LNA has a single-ended-to-differential gain that is selectable through the SPI. The LNA input-referred noise voltage is typically 1.2 nV/√Hz at a gain of 21.3 dB, and the combined input-referred noise voltage of the entire channel is 1.4 nV/√Hz at maximum gain. Assuming a 15 MHz noise bandwidth (NBW) and a 21.3 dB LNA gain, the input SNR is about 91 dB. In CW Doppler mode, the LNA output drives a transconductance amp that is switched through an 8 × 8 differential crosspoint switch. The switch is programmable through the SPI.

Applications

  • Medical imaging/ultrasound
  • Automotive radar

Features

  • 8 channels of LNA, VGA, AAF, and ADC
  • Low noise preamplifier (LNA) - See data sheet for additional information
  • Variable gain amplifier (VGA) - See data sheet for additional information
  • Antialiasing filter (AAF) - See data sheet for additional information
  • Analog-to-digital converter (ADC) - See data sheet for additional information
  • 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
  • See data sheet for additional features

Diagrams

AD9273 Functional Block Diagram
AD9273 Functional Block Diagram

Video

Specifications

Resolution (Bits) 12bit
T-Put Rate 50MSPS
# Chan 8
Supply V Multi(+1.8An,+3An,+1.8D)
Pwr Diss 1.07W
Interface LVDS,Ser
Ain Range 367 mV p-p,550 mV p-p,733 mV p-p
SNR (dB) 65.5dB
Pkg Type QFP

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Part# Bits Throughput Rate # of Inputs Operating Pwr Diss
AD9273-50 12 50MSPS 8 1.07W
AD9222-65 12 65MSPS 8 950mW
AD9212-65 10 65MSPS 8 833mW
AD9252 14 50MSPS 8 773mW
AD9228-65 12 65MSPS 4 510mW
AD9238-65 12 65MSPS 2 698mW
AD9627-150 12 150MSPS 2 890mW
AD9627-80 12 80MSPS 2 490mW
AD9432-80 12 80MSPS 1 1W
AD9226 12 65MSPS 1 500mW
AD9626-170 12 170MSPS 1 291mW
Pricing, Packaging & Availability

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  • Military : -55 to +125 degrees Celsius
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  • Automotive: -40 to +125 degrees Celsius
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*The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.
**Sample availability may be better than production availability. Please enter samples into your cart to check sample availability.

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