Microchip HV2621 Manual


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2019 Microchip Technology Inc. DS20006082A-page 1
HV2621/HV2721/HV2722
Features
300V,16-Channel High-Voltage Analog Switch
3.3V or 5.0V CMOS Input Logic Level
33 MHz Data Shift Clock Frequency
Very Low Quiescent Current (10 µA)
Low Parasitic Capacitance
DC to 50 MHz Analog Small-Signal Frequency
-60 dB Typical Off Isolation at 5.0 MHz
Excellent Noise Immunity
Cascadable Serial Data Register with Latches
Flexible Operating Supply Voltage
Integrated Bleed Resistors on the Outputs (both
sides for HV2721, one side only for HV2722)
Applications
Medical Ultrasound Imaging
Nondestructive Testing (NDT) Metal Flaw
Detection
Multi-Layer Printed Circuit Board (PCB) Tester
Piezoelectric Transducer Drivers
Inkjet Printer Head
Optical MEMS Module
General Description
The HV2621/HV2721/HV2722 devices are 300V,
low-charge injection, 16-channel, high-voltage analog
switches. These devices are designed for use in
applications requiring high-voltage switching
controlled by low-voltage control signals, such as
medical ultrasound imaging, piezoelectric transducer
drivers. HV2621/HV2721 are almost identical to
HV2601/2701 but have larger signal range. If the
VPP/VNN = ±150V, HV2621/HV2721/HV2722 can pass
the analog signal up to ±135V.
The HV2721 has integrated bleed resistors on both
sides of the switches. HV2722 has integrated bleed
resistors on one side, SWxA only. HV2621 has no
bleed resistors. The bleed resistor eliminates voltage
build-up on capacitive loads such as piezoelectric
transducers.
Input data are shifted into a 16-bit shift register that
can then be retained in a 16-bit latch. To change all the
switch state at the same time, the latch enable bar
should be left high until all bits are clocked in. The
input data are clocked in at the rising edge of the
clock. After all bits are clocked in to the shift register, a
negative pulse of the latch enable bar changes all the
switch ON/OFF states defined by input data at the
same time. Using the HVCMOS technology, these
devices combine 300V high-voltage bilateral DMOS
switches and low-power CMOS logic to provide
efficient control of high-voltage analog signals.
These devices are suitable for various combinations of
high-voltage supplies, e.g., VPP/VNN: +60V/-240V,
+150V/-150V, and +260V/-40V.
Package Types
1
64
HV2621/HV2721/HV2722
9x9x1.0mm QFN
(TOP VIEW)
300V, Low-Charge Injection, 16-Channel,
High-Voltage Analog Switch


Produkt Specifikationer

Mærke: Microchip
Kategori: Ikke kategoriseret
Model: HV2621

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