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adxl 375 limit at 25g

Question asked by ddrapt on Feb 2, 2017
Latest reply on Feb 2, 2017 by ddrapt

We have several ADXL375 devices that all limit or cap the raw value read from the device, in each of the three axes, at 0x01FF (511T) and 0xFE00 (-512), which at 0.049g/LSB is 25g and -25g. The device is suppose to be +/-200g.


Has anyone else seen this problem?

Or does anyone have an explanation of what is causing this problem?


Further info (if needed), registers during init (where "--" refers to not read or written):

Register Name          Register Address (hexadecimal)         Value Written (hexadecimal)

==============   ========================        =====================

DATA_FORMAT        31                                                          00

BW_RATE                 2C                                                         0F

THRESH_ACT            24                                                        --

THRESH_INACT         25                                                       --

TIME_INACT              26                                                         --

ACT_INACT_CTL        27                                                       --

FIFO_CTL                   38                                                        90

INT_MAP                    2F                                                        --

INT_ENABLE              2E                                                       --

POWER_CTL              2D                                                      08

Device Id (RO)             00                                                      E5 (value read)