M-A342VD1
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3 Axis Vibration Sensor: M-A342VD1
Features
z Capable of measuring velocity, velocity RMS, and
velocity Peak to Peak (ISO10816/20816 compliant)
z Flat Frequency Response : 10 Hz ~ 1000 Hz (-3 dB)
z Insensitive to magnetic influences
z High dynamic range : s100 mm/s (110 dB)
z Low Noise : 1.410
-4
(mm/s)/ҀHz Typ.
z 3-Axis Digital Output : SPI/UART
z Capable of measuring Displacement : 1 Hz ~ 100 Hz
z Low cross-axis sensitivity (capable of 0.1% with
alignment compensation by host post-process) and
low sensitivity error (1550×10
-6
) to ensure high
accuracy
z Built-in Self Test Function
Application
z Condition Based Maintenance (CBM)
z Machine Health Monitoring (MHM)
z Structural Health Monitoring (SHM)
z Vibration Analysis, Control and Stabilization
z Motion Analysis and Control
z Lissajous Analysis
Typical Performance Characteristic
Figure Noise Density (Velocity Output)
Figure Frequency Response (Velocity Output)
Description
The M-A342 is a three axis digital velocity/displacement
output vibration sensor featuring low noise, high stability,
and low power consumption using fine processing
technology of Quartz.
Incorporating high accuracy, wide bandwidth, and
durability, the versatile M-A342 is well suited to a wide-
range of challenging applications such as Condition Based
Maintenance (CBM), Machine Health Monitoring (MHM),
and Structural Health Monitoring (SHM).
Outline Dimentions
Block Diagram
16
2
48
423
2
24
(2
.
15 ) 19
.
7 2
.
15
9
.
85
14 .65
2.15 19 .7 24 (2 .15 )
B1 B2
㻟㻙䃥㻞 㻚㻡
Unit: mm
M-A342VD1
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Table of Contents
Revision History ········································································································································ 7
Ordering Information ··································································································································· 8
Evaluation tools ········································································································································· 8
Symbols ························��·························································································································· 9
Notice of the Document ······························································································································· 9
Specifications ······························��··········································································································· 10
1.1. Absolute Maximum Ratings ················································································································ 10
1.2. Recommended Operating Condition ····································································································· 10
1.3. Performance and Electrical Specifications ····························································································· 11
1.4. Timing Specifications ························································································································ 13
1.5. Socket Pin Layout and Functions ········································································································· 15
Mechanical Dimensions ···························································································································· 16
2.1. Outline Dimensions ·························································································································· 16
Typical Performance Characteristics ············································································································ 17��
Basic Operation ······································································································································· 18
4.1. Connection To Host ·························································································································· 18
4.2. Operation Mode ······························································································································· 19
4.3. Functional Block ······························································································································ 20
4.4. Data Output Timing ·························································································································· 21
4.5. Data Ready Signal ··························································································································· 21
4.6. Sampling Counter ···························································································································· 21
4.7. Self Test ········································································································································· 21
4.8. Threshold Detection ·························································································································· 23
4.9. Structural Resonance Warning ············································································································ 23
4.10.Checksum ······································································································································ 23
4.11.Automatic Start (For UART Auto Sampling Only) ···················································································· 24
4.12.Intermittent Measurement for Total Current Reduction ············································································· 24
4.13.Frequency Response Characteristics ··································································································· 26
4.14.Velocity and Displacement Output ······································································································· 27
4.15.Alignment Compensation ··················································································································· 29
Digital Interface ······································································································································· 30
5.1. SPI Interface ··································································································································· 31
5.1.1. SPI Read Timing (Normal Mode) ····························································································· 31
5.1.2. SPI Write Timing (Normal Mode) ······························································································ 32
5.1.3. SPI Read Timing (Burst Mode) ································································································ 32
5.2. UART Interface ································································································································ 33
5.2.1. UART Read Timing (Normal Mode) ·························································································· 34
5.2.2. UART Read Timing (Burst Mode) ····························································································· 34
5.2.3. UART Write Timing ··············································································································· 35
5.2.4. UART Auto Sampling Operation ······························································································ 35
5.3. Data Packet Format ·························································································································· 36
5.4. Recommended Communication Conditions ··························································································· 39