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Octal-Channel Ultrasound Front-End with CW Doppler Mixers

Breakthrough Levels of Performance for High-Channel Count Cart-Based and Portable Ultrasound Imaging Equipment

Product Details

Key Features

Simplified Block Diagram

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Key Features

  • 8 Full Channels of LNA, VGA, AAF, and CWD Mixers in a Small, 10mm x 10mm TQFN Package
  • Pin Compatible with MAX2077 with LNA, VGA, and AAF in 10mm x 10mm TQFN Variant
  • Ultra-Low Full-Channel Noise Figure of 2.4dB at RIN = RS = 200Ω
  • Low Output-Referred Noise of 23nV/ at 5MHz, 20dB Gain, Yielding a Broadband SNR of 68dB** for Excellent Second-Harmonic Imaging
  • High Near-Carrier SNR of 140dBc/Hz at 1kHz Offset from a 5MHz, 1VP-P Output Signal, and 20dB of Gain for Excellent Low-Velocity PW and Color-Flow Doppler Sensitivity in a High-Clutter Environment
  • Ultra-Low-Power 64.8mW per Full-Channel (LNA, VGA, and AAF) Normal Imaging Mode (234mW per Channel in CWD Mode)
  • Selectable Active Input-Impedance Matching of 50Ω, 100Ω, 200Ω, and 1kΩ
  • Wide Input-Voltage Range of 330mVP-P in High LNA Gain Mode and 550mVP-P in Low LNA Gain Mode
  • Integrated Selectable 3-Pole 9MHz, 10MHz, 15MHz, and 18MHz Butterworth AAF
  • Fast-Recovery, Low-Power Modes (< 2µs)
  • Fully Integrated, High Dynamic Range CWD Beamformer with Near-Carrier SNR of 154dBc/Hz at 1kHz Offset from a 1.25MHz, 200mVP-P Input Clutter Signal

Applications/Uses

  • Medical Ultrasound Imaging
  • Sonar

Description

The MAX2078 octal-channel ultrasound front-end is a fully integrated bipolar, high-density octal-channel ultrasound receiver optimized for low cost, high-channel count, high-performance portable and cart-based ultrasound systems. The easy-to-use IC allows the user to achieve high-end 2D, PW, and CW Doppler (CWD) imaging capability using substantially less space and power. The highly compact imaging receiver lineup, including low-noise amplifier (LNA), variable-gain amplifier (VGA), and anti-alias filter (AAF), achieves an ultra-low 2.4dB noise figure at RS = RIN = 200Ω at a very low 64.8mW per channel power dissipation. The full imaging receiver channel has been optimized for second-harmonic imaging with -64dBFS second-harmonic distortion performance with a 1VP-P 5MHz output signal. The bipolar front-end has also been optimized for excellent low-velocity PW and color-flow Doppler sensitivity with an exceptional near-carrier SNR of 140dBc/Hz at 1kHz offset from a 5MHz 1VP-P output clutter signal.

A fully integrated high-performance, programmable CWD beamformer is also included. Separate I/Q mixers for each channel are available for optimal CWD sensitivity in high-clutter environments, yielding an impressive near-carrier SNR of 154dBc/Hz at 1kHz offset from a 1.25MHz 200mVP-P input clutter signal.

The MAX2078 octal-channel ultrasound front-end is available in a small 10mm x 10mm, 68-pin thin QFN package with an exposed pad and is specified over a 0°C to +70°C temperature range.

Simplified Block Diagram

MAX2078: Typical Application Circuit MAX2078: Typical Application Circuit Zoom icon

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .