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Supertex |
Supertex inc.
MD0107
Quad High Voltage, Auto Damping Device
Features
►► Up to ±130V input voltage protection
►► 35Ω typical ON resistance
►► Fast switching speed
►► No external supplies needed
Applications
►► Medical ultrasound imaging
►► NDT applications
►► Fast resettable fuses
►► High side switches
►► Data acquisition
Block Diagram
VPP
General Description
The MD0107 can be considered as a normally closed switch
with a typical switch resistance of 35Ω. In this state, the
MD0107 ensures that any leakage currents are shunted to
ground, while maintaining a low voltage drop. This low voltage
level is beneficial as it ensures that the anti-parallel diodes
in the transmit path remain off during the receive cycle of the
system. Thus the anti-parallel diodes more effectively block the
small signals and prevent transmitter noise from contaminating
the receive signal.
During operation of the pulser, the MD0107 switch opens and
thus presents a high impedance to the transmitter pulse. The
switch opens as soon as the voltage across it exceeds +/-2V and
can withstand up to +/-130V. In this off-state, the MD0107 has
very little effect on the transmit pulses or the power dissipated
by the pulser.
The impedance of the MD0107, when the voltage across it is
low, is suitable for terminating transmission lines. Where the line
impedance is higher than the nominal 35Ω of the MD0107, a
series resistor can be added; for example terminating a ~75Ω
line can be effectively achieved by adding a 39Ω resistor. Without
correct line termination, reflections can cause higher signal loss
and degrade image quality in ultrasound systems.
+130V
TX
RTZ Pulser
VNN
RX
Receiver
MD0107
Auto Damper
MD0105
T/R Switch
-130V
X
Doc.# DSFP-MD0107
NR012714
Supertex inc.
www.supertex.com
Free Datasheet http://www.datasheet4u.net/
MD0107
Ordering Information
Part Number
Package Options
MD0107K6-G
12-Lead (4x4) DFN
-G denotes a lead (Pb)-free / RoHS compliant package
Packing
3000/Reel
ESD Sensitive Device
Absolute Maximum Ratings
Parameter
Pin Configuration
Value
12
VA - VB, Differential voltage drop
Maximum junction temperature
Storage temperature range
0 to ±140V
+125°C
-65°C to 150°C
Thermal
Pad
Power dissipation
1.2W
Absolute Maximum Ratings are those values beyond which damage to the
device may occur. Functional operation under these conditions is not implied.
Continuous operation of the device at the absolute rating level may affect device
reliability. All voltages are referenced to device ground.
Typical Thermal Resistance
1
12-Lead DFN
(top view)
(Pads are at bottom of device)
Package
θja
Product Marking
12-Lead DFN
42OC/W
0107
YWLL
Y = Last Digit of Year Sealed
W = Code for Week Sealed
L = Lot Number
= “Green” Packaging
12-Lead DFN
Package may or may not include the following marks: Si or
Electrical Characteristics (Tj = 25ºC, unless otherwise specified)
Sym Parameter
Min Typ
VA-B
RSW
VTRIP
VOFF
IA-B(OFF)
IPEAK
TOFF
TON
CSW(ON)
CSW(OFF)
BW
Max. differential input voltage from A to B
Switch ON resistance from A to B or B to A
VA-B trip point to turn-off
Switch turn-off voltage
Switch off current
Peak switching current
Turn-off time
Turn-on time
Switch ON capacitance from A to B or B to A
Switch OFF capacitance from A to B or B to A
Small signal bandwidth from DC to
±130
-
-
-
-
-
-
-
-
-
-
-
35
±1.0
±2.0
±70
±30
-
-
7.0
5.0
100
TJ Operating junction temperature
-40 -
Max
-
50
±2.0
-
±150
-
20
20
-
-
-
+125
Units Conditions
V IA-B = ±1.0mA
Ω IA-B = ±5.0mA
V ---
V IA-B = ±1.0mA
µA VA-B = ±130V
mA ---
ns ---
ns ---
pF SW = ON
pF
MHz
°C
VSW = 25V
RLOAD = 50Ω
---
Doc.# DSFP-MD0107
NR012714
Supertex inc.
2 www.supertex.com
Free Datasheet http://www.datasheet4u.net/
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