Overview
The STHV748S, produced by STMicroelectronics, is a monolithic, high-voltage, high-speed pulser generator designed primarily for medical ultrasound imaging applications. It features four independent channels and can also be used to drive piezoelectric, capacitive, or MEMS-based transducers. The device includes a controller logic interface circuit, level translators, MOSFET gate drivers, noise blocking diodes, and high-power P-channel and N-channel MOSFETs as the output stage for each channel. Additionally, it incorporates clamping-to-ground circuitry, anti-leakage, anti-memory effect blocks, a thermal sensor, and a T/R switch for effective decoupling during transmission phases. The STHV748S also includes self-biasing and thermal shutdown blocks to ensure reliable operation.
Key Specifications
| Parameter | Value |
|---|---|
| Output Voltage | 0 to ±90 V |
| Peak Output Current | ±2 A |
| Operating Frequency | Up to 20 MHz |
| Jitter | ≤ 20 ps |
| Power Consumption (CW mode) | ≤ 0.1 W |
| Current (CW mode) | ±0.6 A |
| RMS Jitter (100 Hz-20 kHz) | 205 fs |
| On-Resistance | 13.5 Ω |
| Bandwidth | Up to 300 MHz |
| CMOS Logic Interface Voltage | 1.8 V to 3.6 V |
| Package | VFQFPN 64 (9x9x1.0 mm) |
| Operating Temperature (°C) | -40 to 125 |
Key Features
- Pinout compatibility with STHV748
- Recirculation current protection
- 3/5-level output waveform
- Anti-cross conduction function
- Low 2nd harmonic distortion
- Fully integrated clamping-to-ground function
- Anti-leakage on output node
- Dedicated half bridge for continuous wave (CW) operations
- Fully integrated T/R switch
- HV MOS topology to minimize current consumption
- Receiver multiplexing function
- Noise blocking diodes
- Fully self-biasing architecture
- Anti-memory effect for all internal HV nodes
- Thermal protection and standby function
- Reinforced diodes on HV outputs for protection by recirculation current
- Latch-up free due to HV SOI technology
- Very few external passive components needed
Applications
- Medical ultrasound imaging
- Pulse waveform generators
- NDT (Non-Destructive Testing) ultrasound transmission
- Drivers for piezoelectric, capacitive, or MEMS-based transducers
Q & A
- What is the primary application of the STHV748S?
The STHV748S is primarily designed for medical ultrasound imaging applications.
- What is the output voltage range of the STHV748S?
The output voltage range is 0 to ±90 V.
- What is the peak output current of the STHV748S?
The peak output current is ±2 A.
- What is the operating frequency of the STHV748S?
The operating frequency can be up to 20 MHz.
- Does the STHV748S have thermal protection?
- What type of logic interface does the STHV748S support?
The STHV748S supports a 1.8 V to 3.6 V CMOS logic interface.
- Is the STHV748S latch-up free?
- What is the bandwidth of the STHV748S?
The bandwidth can be up to 300 MHz.
- Does the STHV748S require many external passive components?
- What is the package type of the STHV748S?
The package type is VFQFPN 64 (9x9x1.0 mm).
