APPLICATION NOTE
Tilt Vibration Sensor
TVS0713.180
Revision 1.0 2014 September 16
Index
1.Sensor evaluation (3)
2.Operating modes (5)
2.1General description (5)
3.Basic circuit (7)
3.1General description (7)
3.2Basic Circuit (7)
4.Filter Circuit (9)
4.1General description (9)
4.2Circuit (9)
5.Not recommended circuit (11)
5.1General description (11)
5.2Circuit (11)
6.Measuring Note (11)
tilt7.Defined rest state output (12)
7.1General description (12)
7.2Circuit (12)
8.Delay circuit (14)
8.1General description (14)
8.2Circuit (15)
9.Digital filter (17)
9.1General description (17)
9.2Circuit (17)
9.3Schematic (18)
9.4Implementation (19)
10.MOSFET Circuit (21)
10.1General description (21)
10.2Circuit (21)
11.Important Notice (23)
1. Sensor evaluation
Figure 1: Tilt vibration sensor
a) Bottom connector b) Top connector c) GND connector d) Micro ball
e) Top contact pad f)
Bottom contact pad
The tilt vibration sensor TVS0713.180 is not necessarily closed  when at rest . Only in 70% - 99% of time it will be closed when at rest as shown in Figures 2 - 4. The circuit and/or the soft-ware of the electronic device should evaluate state changes from open to closed or closed to open instead of stea
dy states open or closed.
If the sensor is at one DC-level (e.g. high), a slight vibration may cause the sensor signal to toggle. This fake motion cannot be filtered out by the “Small filter circuit” and has to be handled by the µC software. If a hardware solution is needed for this situation the DC part of the signal has to be filtered out first by a high pass filter to get a defined rest state output.
V B Sensor
time
V T Sensor
time
N o i s e
S e n s o r  a t  r e s t
N o i s e
S e n s o r  a t  r e s t
M o t i o n
S e n s o r  a t  r e s t
S e n s o r  a t  r e s t
Figure 2: Tilt vibration sensor, contacts not necessarily closed at rest (idealized plot).
Top connector on idle during sensor orientation between 270° and +90°
V T Sensor
V B Sensor
N o i s e
S e n s o r  a t  r e s t
N o i s e
S e n s o r  a t  r e s t
M o t i o n
S e n s o r  a t  r e s t
S e n s o r  a t  r e s t
time
time
Figure 3: Tilt vibration sensor, contacts not necessarily closed at rest (idealized plot).
Bottom connector on idle during sensor orientation between 90° and 270°
V T Sensor
V B Sensor
N o i s e
S e n s o r  a t  r e s t
N o i s e
S e n s o r  a t  r e s t
M o t i o n
S e n s o r  a t  r e s t
S e n s o r  a t  r e s t
time
time
Figure 4: Tilt vibration sensor, contacts not necessarily closed at rest (idealized plot).
Both connectors are active in vertical (90° or 270°) position. Both can be open but not closed at the
same time.
2. Operating modes
2.1 General description
There are four options available to connect the TVS0713.180.    TVS0713.180 Mode description  TVS0713.180 Electronic symbol
TVS0713.180 Footprint
Tilt vibration mode:
The top connector of the Tilt vibration sensor is at idle as long as the ball is located on the contact pad of the bottom side (see Figure 2). When the sensor is turned upside down the ball will be in contact with the pad of the top side. In this case the bottom connector will be at idle (see Figure 3).
Both connectors are active in vertical position of the
sensor (see Figure 4) where the ball can roll between
both of the pads. It is possible that both connectors
are. But the micro ball can only close one connector at a time.  T V S 0713.180GND Bottom Top  Bottom
Top
GND
Unidirectional bottom mode:
If the top connector is unused the sensor will operate as a unidirectional sensor (see MVS1006.01).
The sensor is open when mounted in upside down position, so that the micro sphere is on the top side of the sensor, which has no contact.
T V S 0713.180
GND Bottom  Bottom
GND

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