TA6038FN
2002-02-13
1
TOSHIBA Bipolar Linear Integrated Circuit Silicon Monolithic
TA6038FN
Shock Sensor IC
TA6038FN detects an existence of external shock through the
shock sensor and output.
Features
· TA6038FN 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 incorporates 1-ch shock detecting circuitry.
· Input terminal of sensor signal is designed high impedance.
Differential input impedance = 100 M (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)
Block Diagram
Pin Connection
(top view)
Weight: 0.04 g (typ.)
OUT
10
DO
AI
AO
V
CC
9
8
7
6
SOA
1
2
3
4
5
SIA
SIB
SOB
GND
7
10
6
V
CC
5
1
2
Comparator
+
-
Comparator
+
-
OPAMP
OPAMP
1.7
V
REF 1.3 V
0.9
V
3
9
C
1
C
2
R
1
50 M
W
50 M
W
C
3
4
-
-
DIFF
´5
& LPF
7 kHz
OP-AMP
-
+
8
C
4
R
2
TA6038FN
2002-02-13
2
Pin Function
Pin No.
Pin Name
Function
1
SOA
Amp (A) output terminal
2
SIA
Connection terminal of shock sensor
3
SIB
Connection terminal of shock sensor
4
SOB
Amp (B) output terminal
5 GND
Ground
terminal
6 V
CC
Power
supply
voltage
7 AO
Op-Amp
output
terminal
8 AI
Op-Amp
input
terminal
9
DO
Differential-Amp output terminal
10 OUT
Output
terminal
(output
= "L" when shock is detected.)
Maximum Ratings
(Ta
=
=
=
=
25°C)
Characteristics Symbol
Rating
Unit
Power supply voltage
V
CC
7 V
Power dissipation
P
D
300
mW
Storage temperature
T
stg
-55 to 150
°C
Recommend Operating Condition
Characteristics Symbol
Rating
Unit
Power supply voltage
V
CC
2.7
to
5.5 V
Operating temperature
T
opr
-25 to 85
°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.
TA6038FN
2002-02-13
3
Electrical Characteristics
(unless otherwise specified, V
CC
=
=
=
=
3.3 V, Ta
=
=
=
=
25°C)
Characteristics Symbol
Test
Circuit
Test Condition
Min
Typ.
Max
Unit
Supply voltage
V
CC
¾
¾
2.7 3.3 5.5 V
V
CC
= 3.3 V
¾
1.8 2.5
Supply current
I
CC
(1)
V
CC
= 5.0 V
¾ 1.8 2.5
mA
(DIFF-AMP)
Characteristics Symbol
Test
Circuit
Test Condition
Min
Typ.
Max
Unit
Input impedance
(Note 1)
Zin
¾
¾ 30
100
¾
M
W
Gain GvBuf
(2)
¾
13.6 14 14.4
dB
Output DC voltage
VoBuf
(3)
Connect C
= 1000 pF
between
1 pin and 2 pin,
3 pin and 4 pin
0.7 1 1.3 V
Low pass filter cut-off freq.
fc
(4)
Frequency at
-3dB point
5
7
11
kHz
Output source current
IBso
(5)
Voh
= V
CC
- 1 V
300
800
¾
mA
Output sink current
IBsi
(6)
Vol
= 0.3 V
75
130
¾
mA
Note 1: Marked parameters are reference data.
(OP-AMP)
Characteristics Symbol
Test
Circuit
Test Condition
Min
Typ.
Max
Unit
Cut-off frequency
(Note 1)
fT
¾
¾ 1.5
2
¾ MHz
Openloop gain
(Note 1)
Gvo
¾
¾ 80
90
¾ dB
Input voltage 1
Vin1
(7)
¾
1.235 1.3 1.365
V
Input current
I
in
(8)
¾
¾ 25 50 nA
Offset voltage
(Note 1)
Voff
¾
¾
-5 0 5 mV
Output source current
IAso
(9)
Voh
= V
CC
- 1 V
250
800
¾
mA
Output sink current
IAsi
(10)
Vol
= 0.3 V
130
200
¾
mA
Note 1: Marked parameters are reference data.
(window-comparator)
Characteristics Symbol
Test
Circuit
Test Condition
Min
Typ.
Max
Unit
Trip voltage 1
(Note 1)
Vtrp1
¾
¾
Vin1
±0.38
Vin1
±0.4
Vin1
±0.42
V
Output source current
IWso
(11)
Voh
= V
CC
- 0.5 V
30
50
¾
mA
Output sink current
IWsi
(12)
Vol
= 0.3 V
300
800
¾
mA
Note 1: Marked parameters are reference data.
TA6038FN
2002-02-13
4
Application Note
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 (kW), R2 (kW)
(V)
0.4
R1
R2
5
2
C1
g
Qs
=
´
´
´
´
R1
R2
0.04
g
Qs
C2
C1
´
´
=
=
(pF)
425
10
100
0.04
5
0.34
C2
C1
=
´
´
=
=
b. Setting the frequency (Hz) of HPF: Setting C3 (mF), R1 (kW)
103
C3
R1
2
1
(Hz)
fc
´
´
´
p
´
=
F)
(
0.8
103
20
10
2
1
C3
m
=
´
´
´
p
´
=
c. Setting the frequency (kHz) of LPF: Setting C4 (pF), R2 (kW)
106
C4
R2
2
1
(kHz)
fc
´
´
´
p
´
=
(pF)
318
106
5
100
2
1
C4
=
´
´
´
p
´
=
< 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 (kW), R2 (kW)
(mV/G)
103
Vsystem
R1
R2
5
2
C1
Qs
´
=
´
´
´
(pF)
10
R1
R2
Vsystem
Qs
C2
C1
4
´
´
=
=
(pF)
170
10
10
100
200
0.34
C2
C1
=
´
´
=
=
4
Figure 1 The Configuration of G-Force Sensor Amplifier
1
LPF
2
Shock
sensor
9
8
0.9 V
1.7 V
3
4
C
1
C
2
50M
W
50M
W
1.3 V
10
´5
Qs (pC/G)
R
1
C
3
C
4
R
2
7
Example: Detecting 5 (G)-shock using a sensor
with Qs = 0.34 (pC/G), R1 = 10 (kW), R2 = 100 (kW).
Example: Setting the frequency to 20 Hz with
R1 = 10 (kW).
Example: Designing the system with 200 (mV/G)
by using a sensor that Qs = 0.34 (pC/G),
R1 = 10 (kW), R2 = 100 (kW).
Example: Setting the frequency to 5 kHz with
R2 = 100 (kW).
TA6038FN
2002-02-13
5
Equivalent Circuit
7
250
W
50
m
A
1 k
W
10
m
A
100
W
9
500
W
50
m
A
1.
5 k
W
10
m
A
100
W
7
20
m
A
10
50
m
A
20
m
A
8
1.
7 V
VREF
8 k
W
8 k
W
18 k
W
AMP
10 k
W
TA6038FN
2002-02-13
6
Test Circuit
(1) Supply
current
I
I
I
I
CC
CC
CC
CC
(2) DIFF-AMP
Gain
GvBuf
GvBuf
GvBuf
GvBuf
Step 1
Step 2
(3) DIFF-AMP
(4) DIFF-AMP
Output DC voltage VoBuf
VoBuf
VoBuf
VoBuf
Low pass filter cut-off freq. fc
fc
fc
fc
10
9
8
7
6
1
2
3
4
5
3.
3 V
M
2 M
W
2 M
W
10
9
8
7
6
1
2
3
4
5
3.
3 V
M
M1
2 M
W
2 M
W
2 M
W
0.
68 V
0.
68 V
2 M
W
10
9
8
7
6
1
2
3
4
5
3.
3 V
M
M2
0.52
0.68
1
2
Gain
-
-
=
2 M
W
2 M
W
2 M
W
0.
68 V
0.
52 V
2 M
W
10
9
8
7
6
1
2
3
4
5
3.
3 V
M
1000 pF
1000 pF
10
9
8
7
6
1
2
3
4
5
3.
3 V
M
100 pF
2 M
W
2 M
W
2 M
W
TA6038FN
2002-02-13
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(5) DIFF-AMP
(6) DIFF-AMP
Output source current IBso
IBso
IBso
IBso
Output sink current IBsi
IBsi
IBsi
IBsi
(7) OP-AMP
Input voltage 1 Vin1
Vin1
Vin1
Vin1
(8) OP-AMP
Input
current
I
I
I
I
in
in
in
in
(9) OP-AMP
(10) OP-AMP
Output source current IAso
IAso
IAso
IAso
Output sink current IAsi
IAsi
IAsi
IAsi
10
9
8
7
6
1
2
3
4
5
3.
3 V
M
2.
3 V
2 M
W
2 M
W
2 M
W
10
9
8
7
6
1
2
3
4
5
3.
3 V
M
0.
3 V
2 M
W
2 M
W
2 M
W
10
9
8
7
6
1
2
3
4
5
3.
3 V
M
10 k
W
10
9
8
7
6
1
2
3
4
5
3.
3 V
M
1.
1 V
2
10
9
8
7
6
1
2
3
4
5
3.
3 V
M
1.
1 V
2.
3 V
10
9
8
7
6
1
2
3
4
5
3.
3 V
M
1.
5 V
0.
3 V
TA6038FN
2002-02-13
8
(11) Window comparator
(12) Window comparator
Output source current IWso
IWso
IWso
IWso
Output sink current IWsi
IWsi
IWsi
IWsi
Test Circuit
(for reference)
(a) DIFF-AMP
(b) DIFF-AMP
CMRR
CMRR
CMRR
CMRR
PSRR
PSRR
PSRR
PSRR
10
9
8
7
6
1
2
3
4
5
3.
3 V
1.
5 V
1.
3 V
M
2.
85 V
10
9
8
7
6
1
2
3
4
5
3.
3 V
1.
5 V
0.
8 V
M
0.
3 V
10
9
8
7
6
1
2
3
4
5
3.
3 V
M
150 pF
150 pF
300 pF
300 pF
10
9
8
7
6
1
2
3
4
5
4.
5 V
M
150 pF 300 pF
TA6038FN
2002-02-13
9
Package Dimensions
Weight: 0.04 g (typ.)
TA6038FN
2002-02-13
10
· TOSHIBA is continually working to improve the quality and reliability of its products. Nevertheless, semiconductor
devices in general can malfunction or fail due to their inherent electrical sensitivity and vulnerability to physical
stress. It is the responsibility of the buyer, when utilizing TOSHIBA products, to comply with the standards of
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such TOSHIBA products could cause loss of human life, bodily injury or damage to property.
In developing your designs, please ensure that TOSHIBA products are used within specified operating ranges as
set forth in the most recent TOSHIBA products specifications. Also, please keep in mind the precautions and
conditions set forth in the "Handling Guide for Semiconductor Devices," or "TOSHIBA Semiconductor Reliability
Handbook" etc..
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(computer, personal equipment, office equipment, measuring equipment, industrial robotics, domestic appliances,
etc.). These TOSHIBA products are neither intended nor warranted for usage in equipment that requires
extraordinarily high quality and/or reliability or a malfunction or failure of which may cause loss of human life or
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responsibility is assumed by TOSHIBA CORPORATION for any infringements of intellectual property or other
rights of the third parties which may result from its use. No license is granted by implication or otherwise under
any intellectual property or other rights of TOSHIBA CORPORATION or others.
· The information contained herein is subject to change without notice.
000707EAA
RESTRICTIONS ON PRODUCT USE
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