Microchip HV7350 Manual

Microchip Ikke kategoriseret HV7350

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Side 1/16
2016 Microchip Technology Inc. DS20005627A-page 1
HV7350
Features
• HVCMOS® Technology for High Performance
• High-density Integrated Ultrasound Transmitter
• 0V to ±60V Output Voltage
• ±1A Source and Sink Current in Pulse Mode
• ±1A Source and Sink Current in Return-to-Zero
(RTZ) Mode
• Up to 20 MHz Operating Frequency
• Matched Delay Times
• Optional Clock Realignment
• 3.3V CMOS Logic Interface and Reference
• +3.3V Low-voltage Supply for VDD
• Built-in Linear Regulators for Floating Gate
Drivers
• Built-in Output Drain Diodes and Bleed Resistors
Applications
• Portable Medical Ultrasound Imaging
• Piezoelectric Transducer Drivers
• Pulse Waveform Generator
General Description
The HV7350 is an 8-channel monolithic high-voltage
high-speed pulse generator with built-in fast return to
zero-damping FETs. This high-voltage and high-speed
integrated circuit is designed for portable medical
ultrasound imaging system.
The HV7350 consists of a controller logic interface
circuit, level translators, MOSFET gate drives, and
high-current power P-channel and N-channel
MOSFETs as the output stage for each channel.
The output peak currents of each channel are
guaranteed to be over ±1A with up to ±60V pulse
swings as well as Return-to-Zero mode. The gate
drivers for the output MOSFETs are powered by built-in
linear 5V regulators referenced to VPP and VNN. This
direct coupling topology of the gate drivers not only
saves four floating voltage supplies or AC coupling
capacitors per channel but also makes the PCB layout
smaller and easier.
An input clock pin is available to realign all the logic
input control lines to a master clock. Precise logic
timing is always essential in any ultrasound systems.
Package Type
56-lead (8 X 8) QFN
(Top view)
See Table 2-1 for pin information.
1
56
8-Channel High-Speed ±60V ±1A Ultrasound RTZ Pulser
HV7350
DS20005627A-page 2 2016 Microchip Technology Inc.
Typical Application Circuit
CPF
VDD
+3.3V
3.3V Logic
RGND
HVOUT1
X1
VPP
+10 to +60V
-10 to -60V
P-Driver
N-Driver
1 of 8 Channels
Logic
&
Level
Translator
-5.0V
RGND
RGND
DMP
1.0µF
VPF
VNF
Rb
LRP
CPOS
GND
GND
SUB
REN
OEN
PIN1
NIN1
PIN8
NIN8
CLK
DAP
LRP
GND
LRN
GND
VNF
VPF
LRN
GND
GND CNEG CNF VNN
+5.0V
-5.0V
1.0µF
1.0µF
1.0µF 1.0µF
TX1
1.0µF 1.0µF
VLL
+3.3V
0.1µF
+5.0V

Produkt Specifikationer

Mærke: Microchip
Kategori: Ikke kategoriseret
Model: HV7350

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