Microchip HV7355 Handleiding


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 2018 Microchip Technology Inc. DS20005896A-page 1
HV7355
Features
• High-Density Integrated Ultrasound Transmitter
• 0V to +150V Output Voltage
• ±1.5A Minimum Source and Sink Current
• ±300 mA Current in CW Mode
• Up to 18 MHz Operating Frequency
• Matched Delay Times
• Built-in Gate Driver Floating Voltage Regulator
• 2.5V to 3.3V CMOS Logic Interface
Applications
• Portable Medical Ultrasound Imaging
• Piezoelectric Transducer Drivers
• Non-Destructive Testing
• Pulse Waveform Generator
General Description
The HV7355 is an 8-channel unipolar high-voltage
high-speed pulse generator. It is designed for medical
ultrasound applications. This high-voltage and
high-speed integrated circuit can also be used for other
piezoelectric, capacitive or MEMS sensors in ultrasonic
non-destructive detection and sonar ranger
applications.
The HV7355 consists of a controller logic interface
circuit, level translators, MOSFET gate drivers and
high-current P-channel and N-channel MOSFETs as
the output stage for each channel.
The output stages of each channel are designed to
provide peak output currents of ±1.5A for pulsing, when
MC = 1, with up to 150V swings. When MC = 0, all the
output stages drop the peak current to ±500 mA for
low-voltage CW mode operation to save power. This
direct coupling topology of the gate driver not only
saves one high-voltage capacitor per channel but also
makes the PCB layout easier.
Package Type
56-lead (8 X 8) VQFN
(Top view)
See Table 2-1 for pin information.
1
56
8-Channel High-Speed Unipolar 1.5A 150V Ultrasound Pulser
HV7355
DS20005896A-page 2  2018 Microchip Technology Inc.
Functional Block Diagram
LR
TX0
LT
IN0
IN7
VLL
VDD
VDD
VPF
VDD
VDD
VDD VPP
GND
MC
TX7
VPP
VPF
VPP
VSS
VSS
+5.0 to 150V
+3.3V
CPF VPPVDD
LR VPF
VDD
+5.0V
CWD
Q[7:0]
LT
LT
LT
-5.0V
D0
SDI
Q7
SDO
SCK
SET
LE
CS
EN PWR
X0
X7
RGND
RGND
RGND
+3.3V
Logic
SUB
Q7
Q0
AVDD
VSUB
Data Latch
Shift Reg.
 2018 Microchip Technology Inc. DS20005896A-page 3
HV7355
Typical Application Circuit


Product specificaties

Merk: Microchip
Categorie: Niet gecategoriseerd
Model: HV7355

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