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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 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) Weight: 0.04 g (typ.)
* *
Block Diagram
C4 C1 1 50 M 2 - OPAMP - + OP-AMP 6 VCC 9 C3 R1 8 R2 7
Pin Connection (top view)
SOA SIA SIB
1 2 3 4 5
10 9 8 7 6
OUT DO AI AO VCC
DIFF & LPF x5 7 kHz 1.7 V 1.3 V 0.9 V
SOB GND
REF - OPAMP 50 M C2 4
+ Comparator - + - Comparator
3
5
10
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TA6038FN/FNG
Pin Function
Pin No. 1 2 3 4 5 6 7 8 9 10 Pin Name SOA SIA SIB SOB GND VCC 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 = 25C)
Characteristics Power supply voltage Power dissipation Storage temperature Symbol VCC PD Tstg Rating 7 300 -55 to 150 Unit V mW C
Recommend Operating Condition
Characteristics Power supply voltage Operating temperature Symbol VCC Topr 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.
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TA6038FN/FNG
Electrical Characteristics (unless otherwise specified, VCC = 3.3 V, Ta = 25C)
Characteristics Supply voltage Supply current Symbol VCC ICC Test Circuit (1) VCC = 3.3 V VCC = 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 = VCC - 1 V Vol = 0.3 V Min 30 13.6 Typ. 100 14 Max 14.4 Unit M 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 A A
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 Iin Voff IAso IAsi Test Circuit (7) (8) (9) (10) Test Condition Voh = VCC - 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 A A
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 = VCC - 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 A A
Note 1: Marked parameters are reference data.
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TA6038FN/FNG
Application Note
C1 2 Shock sensor Qs (pC/G) 50M LPF 50M 3 C2 4 1.3 V 0.9 V x5 9 C3 R1 8 1.7 V 1 C4 R2 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 (k), R2 (k)
Qs x g R2 x2x5x = 0.4 (V) C1 R1 C1 = C2 = Qs x g R2 x 0.04 R1
Example: Detecting 5 (G)-shock using a sensor with Qs = 0.34 (pC/G), R1 = 10 (k), R2 = 100 (k).
C1 = C2 = 0.34 x 5 100 x = 425 (pF) 0.04 10
b. Setting the frequency (Hz) of HPF: Setting C3 (F), R1 (k)
fc (Hz) =
1 x 103 2 x x R1 x C3
Example: Setting the frequency to 20 Hz with R1 = 10 (k).
C3 =
1 x 103 = 0.8 (F) 2 x x 10 x 20
c. Setting the frequency (kHz) of LPF: Setting C4 (pF), R2 (k) fc (kHz) = 1 x 106 2 x x R2 x C4
Example: Setting the frequency to 5 kHz with R2 = 100 (k).
C4 = 1 x 106 = 318 (pF) 2 x x 100 x 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 (k), R2 (k) Qs R2 x2x5x = Vsystem x 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 (k), R2 = 100 (k). C1 = C2 = 0.34 100 x x 10 4 = 170 (pF) 200 10
C1 = C2 =
Qs R2 x x 10 4 (pF) Vsystem R1
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1.7 V
VREF
Equivalent Circuit
18 k 8
8 k
8 k
10 A AMP 7 1.5 k 9 20 A 10 k 50 A 500 100
5
20 A 10 A 250 100 10 1 k 7 50 A
TA6038FN/FNG
50 A
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TA6038FN/FNG
Test Circuit
(1) Supply current ICC
10
9
8
7
6
M
1 2 M
2
3
4 2 M
5
(2)
DIFF-AMP Gain GvBuf Step 1
M1 M 10 9 8 7 6 3.3 V
3.3 V
Step 2
M2 M 10 9 8 7 6 3.3 V 1 2 M 2 3 4 2 M 5
1 2 M
2
3
4 2 M
5
0.68 V 2 M
0.68 V 2 M
2 M 0.68 V
2 M 0.52 V
Gain =
2 - 1 0.68 - 0.52
(3)
DIFF-AMP Output DC voltage VoBuf
M 10 9 8 7 6
(4)
DIFF-AMP Low pass filter cut-off freq. fc
M 10 9 8 7 6
3.3 V
1
2
3
4
5
1
2
3
4
5
1000 pF
1000 pF
2 M
100 pF
2 M
2 M
3.3 V
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TA6038FN/FNG
(5) DIFF-AMP Output source current IBso
M
(6)
DIFF-AMP Output sink current IBsi
M
2.3 V
3.3 V
0.3 V
10
9
8
7
6
10
9
8
7
6
1
2
3
4
5
1
2
3
4
5
2 M
2 M
2 M
2 M
(7)
OP-AMP Input voltage 1 Vin1
M 10 9 8 7
10 k
6
1
2
3
4
5
(8)
OP-AMP Input current Iin
M
1.1 V
10
9
8
7
6
3.3 V
3.3 V
1
2
3
4
5
2
(9)
OP-AMP Output source current IAso
M
(10) OP-AMP Output sink current IAsi
M
2.3 V
1.1 V
0.3 V
3.3 V
1.5 V
10
9
8
7
6
10
9
8
2 M
7
2 M
6
1
2
3
4
5
1
2
3
4
5
7
3.3 V
3.3 V
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TA6038FN/FNG
(11) Window comparator Output source current IWso (12) Window comparator Output sink current IWsi
1.3 V
1.5 V
0.8 V
2.85 V
3.3 V
0.3 V
M
1.5 V
10
9
8
7
6
M
10
9
8
7
6
1
2
3
4
5
1
2
3
4
5
Test Circuit (for reference)
(a) DIFF-AMP CMRR
M 10 9 8 7 6
(b)
DIFF-AMP PSRR
M 10 9 8 7 6
3.3 V
1
2
3
4
5
1
2
3
4
5
150 pF
150 pF
150 pF 300 pF
300 pF
300 pF
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4.5 V
3.3 V
TA6038FN/FNG
Package Dimensions
Weight: 0.04 g (typ.)
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TA6038FN/FNG
RESTRICTIONS ON PRODUCT USE
* The information contained herein is subject to change without notice.
030619EAA
* The information contained herein is presented only as a guide for the applications of our products. No responsibility is assumed by TOSHIBA for any infringements of patents or other rights of the third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of TOSHIBA or others. * 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 safety in making a safe design for the entire system, and to avoid situations in which a malfunction or failure of 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.. * The TOSHIBA products listed in this document are intended for usage in general electronics applications (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 bodily injury ("Unintended Usage"). Unintended Usage include atomic energy control instruments, airplane or spaceship instruments, transportation instruments, traffic signal instruments, combustion control instruments, medical instruments, all types of safety devices, etc.. Unintended Usage of TOSHIBA products listed in this document shall be made at the customer's own risk. * TOSHIBA products should not be embedded to the downstream products which are prohibited to be produced and sold, under any law and regulations.
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