Murata PKGX-14-4010 Manuale utente

CONFIDENTIAL

Shock Sensor Evaluation Module

Operating Manual

Edition 02

2015/5/13

Part Number

PKGX-14-4010

CONFIDENTIAL

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

CONFIDENTIAL

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

CONFIDENTIAL

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」

CONFIDENTIAL

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)

CONFIDENTIAL

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.)

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

CONFIDENTIAL

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).

CONFIDENTIAL

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.

CONFIDENTIAL

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

25±1°

CONFIDENTIAL

Vcc

3.3

AC {G} 0

Rser=0

IC2-1

150p

10MEG

1MEG

330K

68p

100n

15K

IC2-2 R6

10k

IC1

100k

100k C6

100n

15000p

390k

R10

820K

100n

IC3

82p

820k

Vcc

Input Vcc

IC2-1_OUT

Sensor_Output

Vcc Analog_Output

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

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]

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