tb6066fng TOSHIBA Semiconductor CORPORATION, tb6066fng Datasheet - Page 7

• Manufacturer Part Number: tb6066fng
• Description: Shock Sensor Ic
• Manufacturer: TOSHIBA Semiconductor CORPORATION

Application Note
Qs (pC/G)
sensor
Shock
Figure 1 shows the configuration of G-Force sensor amplifier.
The shock sensor is connected between the pins 1 and 16.
How to output 0 or 1 from the pin 7 to detect whether there is a shock or not. !
a. Setting gain: C1
b. Setting the frequency (Hz) of HPF: Setting C3 (PF), R1 (k:)
c. Setting the frequency (kHz) of LPF: Setting C4 (pF), R2 (k:)
How to output the voltage according to the shock through the pin 5. !
a. Setting gain: C1
Vsystem (mV/G). –
C1
fc
fc
C1
Qs
Qs
C1
– Using a sensor with the sensitivity Qs (pC/G) to detect the shock g (G). –
C1
– Using a sensor with the sensitivity Qs (pC/G), and assuming the shock sensitivity of the system is
(Hz)
(kHz)
u
u
16
Figure 1 The Configuration of G-Force Sensor Amplifier
1
C2
C2
g
2
u
u
50 M:
50 M:
5
2
2
C
C
u
u
Qs
2
Vsystem
u
0.04
1
2
5
u
R2
R1
S
u
u
Qs
S
u
15
2
g
R2
R1
u
1
R1
1
u
R2
Vsystem
C2 (pF), R1 (k:), R2 (k:)
C2 (pF), R1 (k:), R2 (k:)
R2
R1
u
u5
u
u
C3
0.4
C4
R2
R1
u
(V)
10 3
u
u
10 6
u
10
14
10 3
4
(pF)
(mV/G)
C
3
R
1
1.2 V
7
4
C1
C3
C4
C1
Example: Detecting 5 (G)-shock using a sensor
with Qs
Example: Setting the frequency to 20 Hz with
R1
Example: Setting the frequency to 5 kHz with
R2
Example: Designing the system with 200 (mV/G)
by using a sensor that Qs
R1
C
R
4
2
C2
C2
2
2
10 (k:).
100 (k:).
10 (k:), R2
u
u
S
S
0.34
u
u
0.34
200
0.34 (pC/G), R1
1
1
10
100
0.04
5
u
u
u
u
20
5
100
5
10
6
u
u
u
100 (k:).
1.6 V
0.8 V
100
10 3
10 6
10
u
10
4
425
0.8
318
170
0.34 (pC/G),
10 (k:), R2
(
(pF)
(pF)
P
F)
(pF)
TB6066FNG
2003-05-14
100 (k:).
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