Meder MMS-B-2 Micro machined sensor Datasheet

MEDER electronic
MMS Series
Micro Machined
Sensors
DESCRIPTION
The MMS is a ultra-small magnetically actuated
reed sensor (SPST) that requires no power. It
is manufactured by using semiconductor wafer
technology. Its biggest advantages are the small
dimensions with 4.8 mm x 2.05 mm (0.189’’x
0.081’’).
FEATURES
APPLICATIONS
• Medical pacemakers and insulin pumps
• Telecommunications
• CMOS gates and other low power signals
switching
• SMT reed sensors (SPST) in miniature size
• requires no power
• ultra-small dimensions
• designed for switching low power devices
(max. 3 VDC)
• 109 Ohm insulation resistance across the
contacts
• magnetic sensitivity ranges from 1.8 to 4.0
milliTesla
• preferably packaged in tape & reel according to
IEC 286/part 3, waffle package possible
• electrostatic sensitive device!!
DIMENSIONS
All dimensions in mm [inches] unspecified tolerances +/- 0.1 mm
Lead design 1
Lead design 2
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MEDER electronic
MMS Series
Micro Machined
Sensors
PAD LAYOUT
Lead design 1+2
PACKAGING
ORDER INFORMATION
Part Number Example
MMS - B - 1
B is the magnetic sensitivity
1 defines the lead design
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Series
Sensitivity
Class
Lead
Design
MMS
B
1,2
MEDER electronic
MMS Series
Micro Machined
Sensors
CONTACT DATA
All Data at 20° C
Contact Form -->
Contact Ratings
Conditions
Form A /
Min.
Typ.
Dry
Max.
Unit
Switching Power
Any DC combination of V & A not
to exceed their individual max.‘s
0.3
mW
Switching Voltage
DC or peak AC
3.0
V
Switching Current
DC or peak AC
100
μA
Carry Current
DC or peak AC
100
μA
Static Contact Resistance
Measured w/ 0.5 V & 50 μA
1000
Ω
Insulation Resistance across
Contacts
25 Volt applied
Breakdown Voltage across
Contacts
50
109
Ω
50
VDC
Operate Time incl. Bounce
Measured w/ 40 % overdrive
0.1
0.2
ms
Release Time
Measured w/ no coil suppression
0.05
0.1
ms
Capacitance
at 10 kHz across contact
0.2
0.5
pF
Life Expectancies
Switching Voltage 1.5 V & 15 μA
107
Cycles
Pull-In
Ramped in 0.1 mT/ms steps
1.8
4.0
mT
Drop-Out
Ramped in 0.1 mT/ms steps
0.5
3.2
mT
Magnetic Characteristics
Environmental Data
Shock Resistance
Any direction
5000
g
Vibration Resistance
From 10 - 2000 Hz
30
g
Ambient Temperature
10°C/ minute max. allowable
-20
100
o
C
Stock Temperature
10°C/ minute max. allowable
-55
150
o
C
Soldering Temperature
3.5 sec. at
260
o
C
Cleaning
fully sealed
Packaging
Tape & Reel
Marking
On Tape & Reel Packaging
17.78 mm Reel (7 inch), 12 mm width,
4 mm ptich
A: Supplier Part Number
B: Supplier Lot Number / Date Code
C: Quantity
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MEDER electronic
MMS Series
Micro Machined
Sensors
ATTENTION
These devices are especially designed for low voltage and
low power switching! The following points must be respected
when the device is connected in a circuit:
ATTENTION
OBSERVE PRECAUTIONS
FOR HANDLING
ELECTRONSTATIC
SENSITIVE DEVICES
• Voltage spikes (electrostatic or otherwise) across the
terminals in the open mode are limited to 10 dv/dt
• Switched voltages and current are limited to the maximum ratings
• The parallel capacitance added across the switch is less
than 100 pF
• Minimize stray capacitance to less than 100 pF in any
lead circuit
• The mounting and test equipment are properly grounded,
as they may induce voltage spikes across the terminals
• All handling is performed on a conductive mat, and
the operator is also grounded through a wrist contact
bracelet
• Permanent sticking or damage of the contacts may result
whenever any of the above warnings is not respected.
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