Ultrasound Transmit Pulser


Ultrasound Transmit Pulser

Ultrasound Transmit Pulser

The LM96551 is an eight-channel monolithic high-voltage, high-speed pulse generator for multi-channel medical ultrasound applications. It is well-suited for use with National’s LM965XX series chipset which offers a complete medical ultrasound solution targeted towards low-power, portable systems.

The LM96551 contains eight high-voltage pulsers with integrated diodes generating ±50V bipolar pulses with peak currents of up to 2A and pulse rates of up to 15 MHz. Advanced features include low-jitter and low-phase-noise output pulses ideal for continuous-wave (CW) modes of operation. Active clamp circuitry is integrated for ensuring low harmonic distortion of the output signal waveform.

The LM96551 also featuers a low-power operation mode and over-temperature protection (OTP) which are enabled by on-chip temperature sensing and power-down logic.

Features
  • 8-channel high-voltage CMOS pulse generator
  • Output pulses with ±50V and 2A peak current
  • Active damper with built-in blocking diodes
  • Built-in floating supply voltages for output stage
  • Up to 15 MHz operating frequency
  • Matched delays for rising and falling edges
  • Low second harmonic distortion allows and improves harmonic imaging
  • Continuous-wave (CW) operation down to ±3.3V
  • Low Phase noise enables Doppler measurements
  • -145 dBc/Hz Phase Noise at 10 MHz (1 kHz offset)
  • Output state over-temperature protection
  • Blocking diodes for direct interface to transducer
  • 2.5V to 5.0V CMOS logic interface
  • Low-power consumption per channel
  • Over Temperature Protection
Applications
  • Ultrasound Imaging

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