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MD2131

High Speed Ultrasound Beamforming Source Driver

Status: In Production

Features:

  • High resolution transmitting waveform
  • Up to 3.0A push-pull source-driving current
  • 230VP-P maximum output, uses two DN2625 FETs
  • Angle vector beamforming I-Q switcher matrix
  • 8-bit apodization DAC and 7.5° angular resolution
  • Flexible frequency-resolution trade-off
  • Programmable aperture windowing
  • 250MHz maximum sampling rate
  • 25MHz ultrasound maximum frequency
  • PWM modulation push-pull current source
  • Focusing phase adjustment & chirp waveform
  • Fast SPI interface
  • 2.5V CMOS logic interface
  • +5.0V single power supply
  • Low second order harmonic distortions
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Overview
Documents
Development Environment
Similar Devices
RoHS Information
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Device Overview

Summary

The MD2131 is a high-speed, arbitrary waveform, push-pull source driver. It is designed for medical ultrasound imaging and HIFU beamforming applications. It also can be used in NDT, Sonar and other ultrasound phase-array focusing beamforming applications. The MD2131 consists of CMOS digital logic input circuits, an 8-bit current DAC for waveform amplitude control, and four PWM current-sources. These current sources are constructed with the high-speed, in-phase and quadrature current-switch matrix and the built-in sine and cosine angle-to-vector look-up table. The angular resolution of the vector table is 7.5O per step, with a total range of 48 steps. There are four logic input signals to control the in-phase and quadrature PWM push-pull current-source’s output timing, frequency, cycle in the burst and waveform envelope. The MD2131’s output stage is designed to drive two DN2625 depletion N-type MOSFETs. The MOSFET drains are connected to a center-tap ultrasound frequency pulse transformer. The secondary winding of the transformer can connect to the ultrasound piezo or capacitive transducer via a cable with a good impendence match. The MD2131 has a high-speed, SPI-compatible interface to achieve per-scan-line fast updating of the data register for changing the beamforming phase angles and apodization amplitudes.

Additional Features
    • High resolution transmitting waveform
    • Up to 3.0A push-pull source-driving current
    • 230VP-P maximum output, uses two DN2625 FETs
    • Angle vector beamforming I-Q switcher matrix
    • 8-bit apodization DAC and 7.5° angular resolution
    • Flexible frequency-resolution trade-off
    • Programmable aperture windowing
    • 250MHz maximum sampling rate
    • 25MHz ultrasound maximum frequency
    • PWM modulation push-pull current source
    • Focusing phase adjustment & chirp waveform
    • Fast SPI interface
    • 2.5V CMOS logic interface
    • +5.0V single power supply
    • Low second order harmonic distortions
Parametrics
Name
Value
Resolution
7.5° Phase
Amplitude Control
PWM
Apodization
8-Bit SPI
Input Voltage (V)
2.5
Typical Delay Time (ns)
4
Output Current (A)
0 - 3.0
Package
QFN-40

Documents

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Development Environment

  • Demo & Evaluation Boards
Demo & Evaluation Boards
MD2131DB1 Demo Board
MD2131DB1 Demo Board ( MD2131DB1 )

The MD2131DB1 is to used to generate the ultrasound transmit beamforming waveform with the Gaussian profile, and the adjustable frequency, amplitude and phase angle.  The MD2131DB1 circuit uses two depletion-mode MOSFETs in the push-pull mode to drive the center tapped, wide band, ultrasound output transformer. The two depletion-mode MOSFETs are packaged in a...

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MD2131DB2 Demo Board
MD2131DB2 Demo Board ( MD2131DB2 )

The MD2131DB2 demoboard is to used to generate the ultrasound transmit beamforming waveform with the Gaussian profile, and the adjustable frequency, amplitude and phase angle. The MD2131DB2 circuit uses two depletion-mode MOSFETs in the push-pull mode to drive the center tapped, coupled, RF power inductor. The two depletion-mode MOSFETs are packaged in a single 5x5mm DFN package. The sources of...

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RoHS Information

Part Number
Device Weight (g)
Shipping Weight (grams)
Lead Count
Package Type
Package Width
Solder Composition
JEDEC Indicator
RoHS
China EFUP
MD2131K7-G
0.073920
0.469388
40
WQFN
5x5x0.8mm
NiPdAu
e4
To see a complete listing of RoHS data for this device, please Click here
Shipping Weight = Device Weight + Packing Material weight. Please contact sales office if device weight is not available.

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