TA6038FN/FNG
TOSHIBA Bipolar Linear Integrated Circuit
Silicon Monolithic
TA6038FN,TA6038FNG
Shock Sensor IC
TA6038FN/FNG detects an existence of external shock through
the shock sensor and output.
Features
•
•
TA6038FN/FNG operates from 2.7 to 5.5 V DC single power
supply voltage.
Signal from the shock sensor is amplified according to setting
gain, and is detected through the internal window
comparator.
TA6038FN/FNG incorporates 1-ch shock detecting circuitry.
Input terminal of sensor signal is designed high impedance.
Differential input impedance = 100 MΩ (typ.)
•
•
•
LPF (low pass filter) circuitry is incorporated.
Cut-off frequency of LPF = 7 kHz
Sensitivity of shock detection can be adjusted by external devices.
Small package
SSOP10-P-0.65A (0.65 mm pitch)
Weight: 0.04 g (typ.)
•
•
Block Diagram
C
4
C
1
1
50 MΩ
2
−
OPAMP
−
OP-AMP
+
6
V
CC
9
C
3
R
1
8
R
2
7
Pin Connection
(top view)
SOA
SIA
SIB
1
2
3
4
5
10
9
8
7
6
OUT
DO
AI
AO
V
CC
DIFF & LPF
×5
7 kHz
1.7 V
1.3 V
0.9 V
SOB
GND
REF
−
OPAMP
50 MΩ
C
2
4
+
−
Comparator
+
−
Comparator
3
5
10
Company Headquarters
3 Northway Lane North
Latham,
New York
12110
Toll Free: 800.984.5337
Fax:
518.785.4725
Web: www.marktechopto.com | Email: info@marktechopto.com
California Sales Office:
950 South Coast Drive, Suite 265
Costa Mesa, California 92626
Toll Free: 800.984.5337
Fax: 714.850.9314
TA6038FN/FNG
Pin Function
Pin No.
1
2
3
4
5
6
7
8
9
10
Pin Name
SOA
SIA
SIB
SOB
GND
V
CC
AO
AI
DO
OUT
Amp (A) output terminal
Connection terminal of shock sensor
Connection terminal of shock sensor
Amp (B) output terminal
Ground terminal
Power supply voltage
Op-Amp output terminal
Op-Amp input terminal
Differential-Amp output terminal
Output terminal (output
=
“L” when shock is detected.)
Function
Maximum Ratings
(Ta
=
25°C)
Characteristics
Power supply voltage
Power dissipation
Storage temperature
Symbol
V
CC
P
D
T
stg
Rating
7
300
−55
to 150
Unit
V
mW
°C
Recommend Operating Condition
Characteristics
Power supply voltage
Operating temperature
Symbol
V
CC
T
opr
Rating
2.7 to 5.5
−25
to 85
Unit
V
°C
Note: The IC may be destroyed due to short circuit between adjacent pins, incorrect orientation of device’s mounting,
connecting positive and negative power supply pins wrong way round, air contamination fault, or fault by
improper grounding.
2
2003-11-25
TA6038FN/FNG
Electrical Characteristics
(unless otherwise specified, V
CC
=
3.3 V, Ta
=
25°C)
Characteristics
Supply voltage
Supply current
Symbol
V
CC
I
CC
Test
Circuit
(1)
V
CC
=
3.3 V
V
CC
=
5.0 V
Test Condition
Min
2.7
Typ.
3.3
1.8
1.8
Max
5.5
2.5
2.5
Unit
V
mA
(DIFF-AMP)
Characteristics
Input impedance
Gain
(Note 1)
Symbol
Zin
GvBuf
Test
Circuit
(2)
Test Condition
Connect C
=
1000 pF
between
1 pin and 2 pin,
3 pin and 4 pin
Frequency at
−3dB
point
Voh
=
V
CC
−
1 V
Vol
=
0.3 V
Min
30
13.6
Typ.
100
14
Max
14.4
Unit
MΩ
dB
Output DC voltage
VoBuf
(3)
0.7
1
1.3
V
Low pass filter cut-off freq.
Output source current
Output sink current
fc
IBso
IBsi
(4)
(5)
(6)
5
300
75
7
800
130
11
kHz
µA
µA
Note 1: Marked parameters are reference data.
(OP-AMP)
Characteristics
Cut-off frequency
Openloop gain
Input voltage 1
Input current
Offset voltage
Output source current
Output sink current
(Note 1)
(Note 1)
(Note 1)
Symbol
fT
Gvo
Vin1
I
in
Voff
IAso
IAsi
Test
Circuit
(7)
(8)
(9)
(10)
Test Condition
Voh
=
V
CC
−
1 V
Vol
=
0.3 V
Min
1.5
80
1.235
−5
250
130
Typ.
2
90
1.3
25
0
800
200
Max
1.365
50
5
Unit
MHz
dB
V
nA
mV
µA
µA
Note 1: Marked parameters are reference data.
(window-comparator)
Characteristics
Trip voltage 1
Output source current
Output sink current
(Note 1)
Symbol
Vtrp1
IWso
IWsi
Test
Circuit
(11)
(12)
Test Condition
Voh
=
V
CC
−
0.5 V
Vol
=
0.3 V
Min
Vin1
±0.38
30
300
Typ.
Vin1
±0.4
50
800
Max
Vin1
±0.42
Unit
V
µA
µA
Note 1: Marked parameters are reference data.
3
2003-11-25
TA6038FN/FNG
Application Note
C
1
2
Shock
sensor
Qs (pC/G)
50MΩ
LPF
50MΩ
3
C
2
4
1.3 V
0.9 V
×5
9
C
3
R
1
8
1.7 V
1
C
4
R
2
7
10
Figure 1
The Configuration of G-Force Sensor Amplifier
Figure 1 shows the configuration of G-Force sensor amplifier. The shock sensor is connected between the
pins 2 and 3.
<
How to output 0 or 1 from the pin 10 to detect whether there is a shock or not.
>
– Using a sensor with the sensitivity Qs (pC/G) to detect the shock g (G). –
a. Setting gain: C1
=
C2 (pF), R1 (kΩ), R2 (kΩ)
Qs
×
g
R2
×
2
×
5
×
=
0.4 (V)
C1
R1
C1
=
C2
=
Qs
×
g R2
×
0.04
R1
Example: Detecting 5 (G)-shock using a sensor
with Qs
=
0.34 (pC/G), R1
=
10 (kΩ), R2
=
100 (kΩ).
C1
=
C2
=
0.34
×
5 100
×
=
425 (pF)
0.04
10
b. Setting the frequency (Hz) of HPF: Setting C3 (µF), R1 (kΩ)
fc (Hz)
=
1
×
103
2
× π ×
R1
×
C3
Example: Setting the frequency to 20 Hz with
R1
=
10 (kΩ).
C3
=
1
×
103
=
0.8 (
µ
F)
2
× π ×
10
×
20
c. Setting the frequency (kHz) of LPF: Setting C4 (pF), R2 (kΩ)
fc (kHz)
=
1
×
106
2
× π ×
R2
×
C4
Example: Setting the frequency to 5 kHz with
R2
=
100 (kΩ).
C4
=
1
×
106
=
318 (pF)
2
× π ×
100
×
5
<
How to output the voltage according to the shock through the pin 7.
>
– Using a sensor with the sensitivity Qs (pC/G), and assuming the shock sensitivity of the system is
Vsystem (mV/G). –
a. Setting gain: C1
=
C2 (pF), R1 (kΩ), R2 (kΩ)
Qs
R2
×
2
×
5
×
=
Vsystem
×
103 (mV/G)
C1
R1
Example: Designing the system with 200 (mV/G)
by using a sensor that Qs
=
0.34 (pC/G),
R1
=
10 (kΩ), R2
=
100 (kΩ).
C1
=
C2
=
0.34 100
×
×
10
4
=
170 (pF)
200 10
C1
=
C2
=
Qs
R2
×
×
10
4
(pF)
Vsystem R1
4
2003-11-25
1.7 V
VREF
Equivalent Circuit
18 kΩ
8
8 kΩ
8 kΩ
10
µA
AMP
7
1.5 kΩ
9
20
µA
10 kΩ
50
µA
500
Ω
100
Ω
5
20
µA
10
µA
250
Ω
100
Ω
10
1 kΩ
7
50
µA
TA6038FN/FNG
50
µA
2003-11-25
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