I have attached the self test limit of each axis for different supply voltages at +/-2g and +/-8g ranges.
Is my understanding correct?
Thanks for the question. Please follow Table. 22 on the latest datasheet for the self-test instruction where it's better to use self-test in the 8g range to avoid hitting the rail. Having said that, the self-test value under 2.0v Vsupply is for the min/typ/max, not a sweep from 1.6v to 3.5v range.
I hope this helps.
Sorry, let me make sure if I got it.
Table 22 shows correct accelerometer output range for each axis under +/-8g range and 2.0V Vsupply conditions,
is my understanding correct?
What are Xout: 230 to 870, Yout: -870 to -230 and Zout: 270 to 800 written on Table 1 for?
The limits on Table 22 are applicable for all supply voltages and cover a wider set of configurations under +/- 8g range.
The limit on table one is characterized with 2.0v Vsupply under +/- 2g range.
I hope this can clarify.
Other two questions.
- Any restriction between VDDI/O and Vs? For instance, Vs=2V and VDDI/O=3.3V or Vs=3V and VDDIO=1.8V
bothe cases are no problem?
- Regarding following specs, they are specified at Vs=2V, how about are they at Vc=3.3V?
1. Sensitivity Change Due to Temperature: 0.05 %/C
2. 0g Offset vs Temperature, Normal Operation and Low Noise Mode and Ultralow Noise Mode
We usually suggest to open up another thread for a different type of questions on the Ezone.
But since the answer is fairly short, I'll just give my answer here. For your first question, Vs ranges from 1.6v - 3.5v where Vddio ranges from 1.6v - Vs which means Vddio should be equal to or less than the Vs. Sensitivity and offset tempco is not characterized over Vsupply but it supposed to be similar. Only the ultralow noise mode is characterized under 3.5v vs 2.0v( which is shown on Table 1) and you can see the noise density improvement due to the increase of the supply voltage.
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