Category: Datasheet/Specs
Product Number: ADXL1003
Hello,
I was reading up the ADXL1003 MEMS sensor datasheet (beause this part came up in the context of a running project).
Note 8 under Table 1 states that for capacitive loads larger than 100pF, a series resistor larger than 8kOhm must be connected. Yet page 11 recommends an RC-filter with R=5kOhm and C=5nF for vibration measurements from 0 kHz to 5 kHz. (With R2 being 0 and C2 not populated, the filter effectively becomes a simple RC. The amp in the ADAQ7980 is then configured as follower, i.e. has unity gain.)
What am I missing? Is the 8kOhm the minimum value to make the ADXL1003 output stable when the capacitive load is at the maximum allowed 22nF value? How to know the minimum required R for a given C?
Best regards,
Wim
