analog switches without high-voltage supplies. They are
intended for use in applications requiring high-voltage
switching controlled by low-voltage control signals, such
as medical ultrasound imaging, driving piezoelectric
transducers and printers.
The HV2903 device has integrated bleed resistors at
both sides of the switches; the HV2904 device has
bleed resistors at one side only, while the HV2803
device has no bleed resistors. The bleed resistor
eliminates voltage build-up on capacitive loads, such
as piezoelectric transducers.
The HV2803/HV2903/HV2904 devices have two
modes of operation determined by the MODE pin input.
MODE input high enables an individual Switching
mode of 32-channel SPST switches and MODE input
low
enables a Bank Switching mode of 16-Pole
Double-Throw (16PDT) switches to support bank
switching for probe selection.
The devices require only ±6V or ±5V low-voltage sup-
plies and no high-voltage supplies. However, all of the
analog switches can transmit ±100V high-voltage pulses.
Applications
• Medical Ultrasound Imaging
• Non-Destructive Testing (NDT) Metal Flaw
Detection
• Piezoelectric Transducer Drivers
• Inkjet Printer Heads
• Optical MEMS Modules
Package Type
HV2803/HV2903/HV2904
12 x 12 x 1.20 mm TFBGA
(Top View*)
1
A
B
C
D
E
F
G
H
J
K
L
M
N
P
2
3
4
5
6
7
8
9 10 11 12 13 14
* See
Section 2.0 “Package Pin Configuration
and Function Description”.
2017 Microchip Technology Inc.
DS20005721A-page 1
HV2803/HV2903/HV2904
Block Diagram
Level
Shifters
CLR
D
OUT
CLK
D
IN
/AB
LE/EN
STBY
SW2A
32-Bit
Shift
Register
and
Latches
(Mode = H,
Individual
Switching Logic)
SW0B
SW1A
Output
Switches
Bleed
Resistors
SW0A
SW1B
MODE
(Mode = L,
Bank Switching
Logic)
SW2B
SW30A
EN
A/B
Logic
Control
and
Latches
SW30B
SW31A
SW31B
V
LL
GND
V
SS
V
DD
R
GND
HV2903 has bleed resistor at SWxA and SWxB
HV2904 has bleed resistor at SWxA only
DS20005721A-page 2
2017 Microchip Technology Inc.
HV2803/HV2903/HV2904
1.0
ELECTRICAL CHARACTERISTICS
Absolute Maximum Ratings†
Logic Supply Voltage (V
LL
)......................................................................................................................... -0.5V to +6.6V
Positive Supply Voltage (V
DD
).................................................................................................................... -0.5V to +6.6V
Negative Supply Voltage (V
SS
) .................................................................................................................. +0.5V to -6.6V
Logic Input Voltage (V
IN
).....................................................................................................................-0.5V to V
LL
+ 0.3V
DGND to GND ........................................................................................................................................... -0.3V to +0.3V
Analog Signal Range (V
SIG
)......................................................................................................................-110V to +110V
目前医疗监护中无法动态掌握患者信息，一旦患者病情恶化，无法在第一时间实施抢救，对数据信息维护效率低。 文中首先阐述了蓝牙技术及其在医疗监护中应用的可行性，然后设计了系统框架，给出了具体功能，BlueTooth Wireless Communication Technology Application in Medical Monitoring包括数据采集和语音报警，最后对蓝牙信号在传输...[详细]
Microchip MCU
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
