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PDF MD0100N8-G Data sheet ( Hoja de datos )
| Número de pieza | MD0100N8-G | |
| Descripción | High Voltage Protection T/R Switch | |
| Fabricantes | Supertex | |
| Logotipo |  |
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Supertex inc.
MD0100
High Voltage Protection
T/R Switch
Features
►► Up to ±100V input voltage protection
►► Low on resistance - 15Ω typical
►► Fast switching speed
►► Effectively, a simple two terminal device
►► No external supplies needed
Applications
►► Medical ultrasound imaging
►► NDT applications
►► Fast resettable fuses
►► High side switches
►► Data acquisition
General Description
The Supertex MD0100 is a high voltage, two terminal, bi-
directional, current-limiting protection device. The two terminals
are interchangeable. It is designed to protect a low noise receiver
from the high voltage transmit pulses in ultrasound applications
and is commonly referred to as a T/R (transmit and receive)
switch.
The MD0100 can be considered as a normally closed switch with
a typical switching resistance of 15Ω that allows small signals to
pass. Once the voltage drop across the two terminals exceeds
a nominal value of ±2.0V, the device will start to turn off. In the
off state, the MD0100 can withstand up to ±100V across its
terminals. A small amount of current, typical of 200µA, is allowed
to flow through.
The applications for the MD0100 are not limited to just ultrasound.
It can also be used for resettable fuses to protect power lines,
output short circuit protection, and data acquisition. The MD0100
is available in the SOT-89 package as a single channel device for
ease of assembly. It is also available in a 4.0x4.0mm 8-Lead DFN
package as a two channel device for high density requirements.
Typical Application Circuit
+90V
Logic
Control
and
Signal
Processing
Transmitter
TX
-90V
RX
Receiver
B MD0100 A
T/R Switch
Piezo
Transducers
High Voltage
Switches
Doc.# DSFP-MD0100
C070113
Supertex inc.
www.supertex.com
1 page  
Figure 3: TOFF Timing Diagram
+10V
VA
+2V
10%
VB
Figure 4: TOFF at VA = 10V
Figure 6: TON Timing Diagram
VA +10V
0V
VB 2V
0V
+2V
1V
Figure 7: TON at VA = 10V
MD0100
2V
10%
2V
1V
Figure 4 shows the actual waveform and measurement of the Figure 7 shows the actual waveform and measurement of
TOFF. TOFF is measured from 2V of the VA to 10% of the VB. the TON. The TON is measured from 2V of the VA to 1V of the
From the above waveform, the TOFF is 11ns.
VB. From the above waveform, the TON is 6.6ns.
Figure 5: Test Set Up for TON
500ns
+10V
0V
Tx
Transmitter
2V
15Ω
VB MD0100 VA
Figure 8: Test Set Up for IPEAK
IPEAK
0 - 5V
tr = 10ms
B MD0100
V
A
Doc.# DSFP-MD0100
C070113
Supertex inc.
5 www.supertex.com
5 Page | ||
| Páginas | Total 9 Páginas | |
| PDF Descargar | [ Datasheet MD0100N8-G.PDF ] | |
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