SCA8X0/21X0/3100 Series
TABLE OF CONTENTS
Table of Contents .....................................................................................................................2
General Description..................................................................................................................5
1.1 Introduction................................................................................................................................5
1.2 Features......................................................................................................................................5
1.3 Typical applications...................................................................................................................6
1.4 Functional Description..............................................................................................................6
1.4.1
1.4.2
1.4.3
1.4.4
1.4.5
1.4.6
1.4.7
1.4.8
1.4.9
Sensing element ...................................................................................................................................6
Interface IC............................................................................................................................................6
Capacitance to voltage conversion.......................................................................................................6
Analog to digital conversion..................................................................................................................7
Signal conditioning and filtering............................................................................................................7
Temperature measurement ..................................................................................................................7
Memory .................................................................................................................................................7
SPI ........................................................................................................................................................7
Self diagnostics.....................................................................................................................................7
1.4.10 Power supply interface..........................................................................................................................7
1.4.11 Factory calibration.................................................................................................................................7
2 Operation Modes.................................................................................................................8
2.1 Measurement mode ...................................................................................................................8
2.2 Temperature output...................................................................................................................8
2.3 Self-diagnostic functions..........................................................................................................8
2.3.1
2.3.2
2.3.2.1
2.3.2.2
Memory self-diagnostic.........................................................................................................................8
Signal path self-diagnostic....................................................................................................................8
SCA8X0 – single axis accelerometers ..........................................................................................8
SCA21X0 and SCA31X0 – multi axis accelerometers ..................................................................8
2.4 Power Down mode.....................................................................................................................9
2.5 Recommended start-up sequence ...........................................................................................9
2.6 Recommended operation sequence ......................................................................................10
2.7 Recommended procedures or optional features..................................................................11
2.7.1
2.7.1.1
2.7.1.2
2.7.1.3
2.7.1.4
2.7.1.5
2.7.2
2.7.2.1
2.7.2.2
SCA8x0/SCA21x0/SCA31x0 ..............................................................................................................11
Read back procedure ..................................................................................................................11
Checksum during operation.........................................................................................................11
Saturated data .............................................................................................................................11
Noiseless output ..........................................................................................................................11
Component ID..............................................................................................................................11
SCA8x0...............................................................................................................................................11
Mass deflection during operation.................................................................................................11
Monitor acceleration data during mass deflection.......................................................................12
3 Addressing Space.............................................................................................................12
3.1 Output registers.......................................................................................................................12
3.1.1
3.1.1.1
3.1.1.2
3.1.2
3.1.2.1
X axis acceleration output...................................................................................................................12
X_LSB..........................................................................................................................................12
X_MSB.........................................................................................................................................13
Y axis acceleration output...................................................................................................................13
Y_LSB..........................................................................................................................................13
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