HV7351

HV7351 8-Channel, ±70V, 3A Programmable High-Voltage Ultrasound-Transmit Beamformer Features Eight Channels with Return-to-Zero (RTZ) Up to ±70V Output Voltage ±3.0A Output Current Stores up to Four Different Patterns Independent Programmable Delays 80-lead Single 11 x 11 mm VQFN Package Applications Medical Ultrasound Imaging NDT, Non-Destructive Testing Arbitrary Pattern Generator High-Speed PIN Diode Driver Typical Application Circuit HV7351 8-channel U1 Tx1 Tx2 tDELAY1 tDELAY2 General Description The HV7351 device is an 8-channel programmable high-voltage ultrasound-transmit beamformer. Each channel is capable of swinging up to ±70V with an active discharge back to 0V. The outputs can source and sink up to 3.0A to achieve fast output rise and fall times. The active discharge is also capable of sourcing and sinking 3.0A for a fast return to ground. The topology of the HV7351 will significantly reduce the number of I/O logic control lines needed. Each pulser has four associated 64-bit shift registers for storing predetermined transmit patterns and a 10-bit delay counter for controlling the transmit time. One of four arbitrary patterns can be transmitted with adjustable delay, depending on the data loaded into these shift registers and the delay counter. The delay counter can be clocked up to 200 MHz, allowing incremental delays down to 5 ns. Array Probe E1 E2 TRIG HV7351 8-channel U2 Tx3 tDELAY3 E3 HV7351 8-channel U16 Tx127 Tx128 TRIG tD...