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 Texas Instrument’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.
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
Output voltage ±50 V
Output peak current ±2.0 A
Output pulse rate Up to 15 MHz
Rise/fall delay matching (max) < 3.7 ns
Pulser HD2 (5 MHz) -40 dB
Operating Temp. 0 to +70 °C
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