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PDF ZL70008 Data sheet ( Hoja de datos )

Número de pieza ZL70008
Descripción (ZL70002 - ZL70010) Medical Surge Protection Devices
Fabricantes Zarlink Semiconductor 
Logotipo Zarlink Semiconductor Logotipo



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No Preview Available ! ZL70008 Hoja de datos, Descripción, Manual

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Features
• Extremely fast turn-on
• Very small size and very low leakage
• 5, 6 and 7 terminals available
• Standard delivery form: solder bumped die
• Facilitates compliance with EN-45502 and EN-
50061
Superior Quality
• QA procedures based on MIL-PRF-38535
• Traceability for every chip to lot and wafer
number
• 100% burn-in capability
ZL70002/08/09/10
Medical Surge Protection Devices
Data Sheet
July 2003
Ordering Information
ZL70002/UDJ Bumped Die, Waffle Tray
ZL70008/UDJ Bumped Die, Waffle Tray
ZL70009/UDJ Bumped Die, Waffle Tray
ZL70010/UDJ Bumped Die, Waffle Tray
0 to +55°C
Description
The ZL70002/08/09/10 family are high performance
surge protection devices targeted for medical
applications.
Applications
• Pacemakers, Implantable Cardioverter
Defibrillators (ICDs), Neurostimulators, Bladder
Control Devices
• Medical devices with electronics requiring
protection against a high voltage surge
Rb
T1
Rb
T2
Rb
T3
Rb
T4
Rb
T5
Rb
T6
Figure 1 - ZL70010 Block Diagram
1
Zarlink Semiconductor Inc.

1 page




ZL70008 pdf
Data Sheet
ZL70002/08/09/10
2.0 Application
According to the EN-45502 standard, all active medical devices intended for implantation in a human torso should
not be permanently affected by an external defibrillation of the patient. Compliance is confirmed if the implanted
device continues to meet device specification after being subjected to a sequence of 140 Volt pulses in series with
a 300 Ohm resistor between each conductive part of the device including the device case (see EN-45502 for
details). Using the ZL70002/08/09/10 protects the implantable device and is an effective means of compliance with
the EN-45502 standard where the electronics, in almost all cases, would be destroyed if not protected. The same
compliance tests are also described in EN-50061.
In the application example shown in Figure 6, each of the dual chamber pacemaker's terminals and case are
connected to a terminal on the protection device. If a defibrillation pulse causes the ventricular tip to begin to go
positive, relative to the case, the ZL70008/9 thyristor structure rapidly becomes active and forms a low impedance
path between T2 and T3 to absorb the current and limit the voltage. This provides an effective means of protection
to the pacemaker chip. In actuality, the voltages and currents the implanted device is subjected to in an actual
defibrillation can be higher than described in EN-45502/EN-50061 and has been taken into account when designing
the ZL70002/08/09/10 family.
Surge Protection Device
ZL70008/09
Typical Dual Chamber Pacemaker
Atrial tip lead
Atrial ring lead
Case
Ventricular tip lead
Ventricular ring lead
T1 T2 T3 T4 T5
Analog chip
Charge
Pump
Stimulation
and
Sensing
block
Voltage
and
Current
Reference
Digital
chip
Figure 6 - Pacemaker Application Example
Terminals placed most remotely to others should get special attention since they effectively form a large pick-up
coil and could therefore be exposed to a large amount of current. When implanted, the pacemaker case is placed
beneath the collarbone and all other terminals are placed together inside the heart. For this reason, the largest
current will pass through the surge protection terminal connected to the case of the pacemaker. For ZL70008/9, we
recommend that the case be connected to T3 of the protection device which is designed to be able to withstand the
largest amount of current. If device ZL700010 is used in a 5 terminal application, we recommend that 2 pins of the
protection device be connected to the implantable device terminal with the largest current flow (typically the terminal
for the device case).
5
Zarlink Semiconductor Inc.

5 Page





ZL70008 arduino
Data Sheet
ZL70002/08/09/10
DUT
Rg
Ip
+
Vg
-
Figure 13 - Holding Current Circuit
VT
Vfzmin
Vpeak
Ip= 4 A
dI/dt = 4A/us
t ond
t
Figure 14 - Turn-on Delay Definition
11
Zarlink Semiconductor Inc.

11 Page







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