Murata PKGX-14-4010 User manual

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Shock Sensor Evaluation Module
Operating Manual
Edition 02
2015/5/13
Part Number
PKGX-14-4010

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1 Outline 3
1.1 Features 3
1.2 Application Example 4
1.3 Functional Block Diagram 4
1.4 Functional Block Layout Diagram 5
2 Evaluation Procedures 6
3 Electrical Specifications and Board Information 7
3.1 Input & Output Terminals 7
3.2 Electrical Specifications 8
3.3 Circuit Diagram 10
3.4 Bill of Material 11
3.5 External Dimension 12
3.6 Board Layout 13
4 Precautions 14
4.1 Precautions when in use 14
4.2 Other Precautions 14

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1 Outline
This document describes the evaluation module for the Piezo Ceramic Shock Sensor
(PKGS-25SXAP1-R) produced by Murata Manufacturing Co., Ltd. on its configuration, usage and other
information.
1.1 Features
The evaluation module is shipped with the required peripherals on the board and you can start
to evaluate the module easily to use Shock Sensor. The features of this evaluation board are:
-Able to evaluate easily the sensor by supplying power to the evaluation module.
-It is possible to detect acceleration in frequency band up to 1KHz.
-PKGS-25SXA P1-R Shock Sensor (1 axis of detection ) has been installed.
-Due to the compactness (16.8mm x 10.8mm x 3.55mm), it is easy to install the module in your
evaluation environment.
-The portions of sensor and circuits are shielded by countermeasure against external noise.
-With supplied connector, the connection between module and your equipment is easy.
-An output terminal, provided after the first stage amplifier, is used as an operability checkpoint.
-It is an analog output. As it is equipped with a comparator, the output of comparison result
against threshold value is also possible.
Fig. 1. Appearance of the Evaluation Module

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1.2 Application Examples
Below show some application examples that use this evaluation module.
1.Anti-thief Vibration Detection 2.Abnormal Motor Vibration Detection 3.Input Devices
Fig. 2. Application Examples
1.3 Functional Block Diagram
Fig. 3shows the functional block diagram of the evaluation module.
Fig. 3. Functional Block Diagram
Note 1: Refer to chapter 3.1 details about「I/O Terminal」

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1.4 Functional Block Layout Diagram
Fig. 4. shows a functional block layout of the evaluation module.
Fig. 4. Functional Block Layout Diagram
Comparator Circuit
Charge Amplifier
Circuit
Shock Sensor
Connector
(I/O terminal)

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2 Evaluation Procedures
The following shows an example of the evaluation procedures for using this evaluation module.
①Attach this module to the target of measurement.
(Usually at our company, we use the Double-side tape shown below. Note 2.)
<Reference>
Fig 5. Double-side Tape of Nichiban Co., Ltd
Note 2: Please put the Double-side tape in whole surface of back side evaluation module and put
uniformly-flat, in order that the acceleration which you want to get can transact to the evaluation module.
②Supply predefined voltage (e.g.3.3V) to the board through VCC and GND at I/O Terminal.
③When observing the waveform of the analog signal output, connect oscilloscope to AOUT .
When checking comparator circuit signal output, connect to COUT..
Fig. 6. Connection Diagram of Evaluation Module
④If necessary, attach the included shield cover. (Solder to the red frame of Diagram 6)
COMP_OUT
A_OUT
VCC
GND
AMP1
Oscilloscope

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3 Specifications & Board Information
The following show the electrical specifications and the board information of the evaluation module
when shipped..
3.1 Input & Output Terminals
Fig. 7shows detailed information of input-output terminals (I/O Terminal) on the evaluation
module.
Fig. 7. Appearance of Input-Output Terminals
Table 1. I/O Terminal List
Symbol Wire
Color Description
COMP_OUT Green Comparator Output Terminal of Sensor (after signal amplification).
Output is HIGH when detected. Output is LOW when not detected.
A_OUT Blue Analog Output Terminal of Sensor (after signal amplification).
VCC Red The Power Supplying Terminal of Evaluation Module.
GND Black The Ground Terminal of Evaluation Module.
AMP1 Yellow Analog Output Terminal of Sensor (after first stage amplification).

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3.2 Electrical Specifications & Mechanical Specifications
The following shows the electrical and mechanical specifications of this evaluation module.
Table 2. Electrical Specifications
※Unless otherwise specified, temperature of measurement is 25ºC and supply voltage is 3.3V
Parameters Value Unit
Min. Typ. Max.
Operating Temperature Range -40 - 85 ℃
VCC Input Voltage Range 2.5 - 5.0 V
A_OUT Output Voltage Range 0.0 - VCC V
COMP_OUT Output
Voltage Range
When detected - - VCC V
When not detected 0.0 - - V
Reference Voltage T.B.D 1.65 T.B.D V
Gain
Charge AMP 13.9 dB
AMP 2 9.6 dB
AMP 3 35.0 dB
Cutoff
frequency(-3dB)
HPF 1 106 Hz
HPF 2 106 Hz
LPF 1 2340 Hz
LPF 2 2340 Hz
LPF 3 1061 Hz
Comparator Threshold Value 2.24 V
Current Consumption (Note 3) 1.55 mA
Note 3: Current Consumption is depending on Current Consumption of OP-AMP and Current
Consumption generated of Reference Voltage portion.

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Table3. Mechanical Specifications
※Unless otherwise specified, temperature of measurement is 25ºC and supply voltage is 3.3V
Parameters Value Unit
Min. Typ. Max.
Circuit Sensitivity T.B.D 0.35 T.B.D V/G
Sensor Resonance Frequency 21 27 kHz
Number of Axis 1
Inclination Angle of Sensor Shaft 24 25 26 °
Fig 8. Inclination of Shock Sensor Shaft (PKGS-25SXAP1-R)
Axis D : This axis (Inclination) is an acceleration applied direction, when electric charge sensitivity is
checked. It tolerance is within ±1º.
Electrode B
Electrode A
Polarity marking
Z
Y
X
25±1°
D

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Vcc
3.3
AC {G} 0
Rser=0
V1
IC2-1
C1
150p
R1
10MEG
R3
1MEG
R2
330K
C3
68p
C4
100n
R4
15K
IC2-2 R6
10k
IC1
R7
100k
R8
100k C6
100n
15000p
C2
R9
390k
R10
820K
C7
100n
IC3
C5
82p
R5
820k
Vcc
Input Vcc
IC2-1_OUT
Sensor_Output
Vcc Analog_Output
Vcc
Vcc
Comparator_Output
Vref
Vcc
.ac oct 100 1 50k
.params G=1
OPA2376AIYZDT1/2
Vos = 25uVmax.
Ib= 10pAmax.
GBW= 5.5MHz
Low Noise 7.5nV
IQ=950uA* 2
Rail toRail Vref=2.24V
OPA2376AIYZDT
2/2 BU7275HFV
IDD=1.2uAmax.
Full Swing
Gain=56
LPF2, Fc =2.3KHz
LPF 3,
Fc =1.06KHz
HPF, Fc = 106Hz
U1
3.3 Circuit Diagram
Following shows the circuit diagram of evaluation module.
Fig 9. Circuit Diagram
(Formulas Descriptions)
Charge AMP = 20log10 (Cf/C1) [dB] (In case of PKGS-25SXA、Cf=740pF)
AMP2 = 20log10 (R3/R2) [dB]
AMP3 = 20log10 (R5/R4) [dB]
HPF1 = 1/(2×π×C1 ×R1) [Hz]
HPF2 = 1/(2×π×C4 ×R4) [Hz]
LPF1 = 1/(2×π×C3 ×R3) [Hz]
LPF2 = 1/(2×π×C5 ×R5) [Hz]
LPF3 = 1/(2×π×C2 ×R6) [Hz]