STHV748SQ Datasheet STHV748SQ | P1-P3

December 2016

DocID030128 Rev 1

1/5

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STHV748S

Quad ± 90 V, ± 2 A, 3/5 level, ESD-enhanced high-speed

ultrasound pulser

Data brief

Features

 Pinout compatibility with STHV748

 Recirculation current protection

 0 to ±90 V output voltage

 Up to 20 MHz operating frequency

 Embedded low-power, floating high-voltage

drivers (external voltage rails can be also

used)

 Mode operations:

 3/5-level output waveform

 ±2 A source and sink current

 Down to ≤ 20 ps jitter

 Anti-cross conduction function

 Low 2

harmonic distortion

 Fully integrated clamping-to-ground function

 8 Ω synchronous active clamp

 Anti-leakage on output node

 Dedicated half bridge for continuous wave

(CW) operations

 ≤ 0.1 W power consumption

 ±0.6 A source and sink current

 205 fs RMS jitter [100 Hz-20 kHz]

 Fully integrated T/R switch

 13.5 Ω on-resistance

 HV MOS topology to minimize current

consumption

 Up to 300 MHz BW

 Receiver multiplexing function

 1.8 V to 3.6 V CMOS logic interface

 New digital input compatibility @ 1.8 V

 Auxiliary integrated circuits

 Noise blocking diodes

 Fully self-biasing architecture

 Anti-memory effect for all internal HV

nodes

 Thermal protection

 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 ultrasound transmission

 Piezoelectric transducer drivers

Description

STHV748S

2/5

DocID030128 Rev 1

1 Description

This monolithic, high-voltage, high-speed pulser generator features four independent

channels. It is designed for medical ultrasound imaging applications, but can also be used

to drive piezoelectric, capacitive or MEMS based transducers.

The STHV748S is composed of 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. It also includes clamping-to-ground

circuitry, anti-leakage, anti-memory effect block, thermal sensor, and a T/R switch which

guarantees effective decoupling during the transmission phase. The STHV748S also

includes self-biasing and thermal shutdown blocks.

Each channel can support up to five active output levels with two half bridges. The 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.

An ESD reinforced structure was developed to prevent high voltage overshoots and inrush

current due to cabled transducer reflections. Each HV output is supported by a dedicate HV

diode network to withstand possible reflections, mitigating excessive voltage overshoot that

could lead to device damage.

STHV748S

Block diagram

DocID030128 Rev 1

3/5

2 Block diagram

Figure 1: STHV748S functional block diagram

P1-P3 P4-P5

STHV748SQ

Mfr. #:

Buy STHV748SQ

Manufacturer:

STMicroelectronics

Description:

IC PULSER GENERATOR 4CH 64QFN

Lifecycle:

New from this manufacturer.

Delivery:

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STHV748SQ