ST STEVAL－IME003V1医疗超声波图像解决方案

1、st stevalime003v1医疗超声波图像解决方案st公司的steval-ime003v1是基于四路sthv748高压脉冲发生器的超声波图像演示板,输出波形通过衔接探针到bnc就能挺直在示波器上显示.16种预置波形能用来在变幻的条块下测试高压(hv)脉冲发生器.而sthv748是±90 v 2 a高速脉冲发生器,工作频率高达20mhz,主要用于医疗超声图像,脉冲发生器,ndt超声发送和压电驱动器.本文介绍了sthv748主要特性,典型应用以及steval-ime003v1主要特性,框图,材料清单和元件布局图.the steval-ime003v1 demonstration b

2、oard is designed around the sthv748 4-channel high voltage pulser, a state-of-the-art device designed for ultrasound imaging applications.the output waveforms can be displayed directly on an oscilloscope by connecting the scope probe to the relative bncs. 16 preset waveforms are available to test th

3、e hv pulser under varying conditions.sthv748 is 5-level, ±90 v, 2 a high speed pulser with four independent channels.this monolithic, high-voltage, high-speed pulser generator features four independent channels. it is designed for medical ultrasound imaging applications, but it can also be used

4、 for driving other piezoelectric, capacitive or based transducers. the sthv748 comprises a controller logic interface circuit, level translators, gate drivers, noise blocking diodes, and high-power p-channel and n-channel mosfets as the output stage for each channel, clamping-to-ground circuitry, an

5、ti-leakage, anti-memory effect block, thermal sensor, and a t/r switch which guarantees an effective decoupling during the transmission phase. moreover, the sthv748 includes self-biasing and thermal shutdown blocks. each channel can support up to five active output levels with two half bridges. the

6、output stage of each channel is able to provide ±2 a peak output current. in order to reduce power dissipation during continuous wave mode, a dedicated half bridge is available and the peak current is limited to 0.6 a.sthv748主要特性:0 to ±90 v output voltageup to 20 mhz operating frequencyemb

7、edded low-power, floating high-voltage drivers (external voltage rails can be also used)mode operations:3/5-levels output waveform±2 a source and sink currentdown 20 ps jitteranti-cross conduction functionlow 2nd harmonic distortionfully integrated clamping-to-ground function8 synchronous activ

8、e clampanti-leakage on output nodededicated half bridge for continuous wave (cw) operations 0.1 w power consumption±0.6 a source and sink current 10 ps jitterfully integrated t/r switch13.5 on resistancehv mos topology to minimize current consumptionup to 300 mhz bwreceiver multiplexing function2.4 v to 3.6 v logic interfaceauxiliary integrated circuitsnoise blocking diodesfully self-biasing architectureanti-memory effect for all internal hv nodesthermal protectionstandby functionlatch-up free due to hv soi technologyvery few external passive components