HV7351 Datasheet, PDF (1/26 Pages) Microchip Technology – 8-Channel, ±70V, 3A Programmable High-Voltage

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
Tx1
HV7351
8-channel
Tx2
U1
t_DELAY1
t_DELAY2
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 topol-
ogy 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 adjust-
able 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
Tx3
t_DELAY3
E3
HV7351
8-channel
U2
TRIG
HV7351
8-channel
U16
Tx127
Tx128
TRIG
t_DELAY127
t_DELAY128
 2015 Microchip Technology Inc.
E127
E128
DS20005412A-page 1