Tool/software:
Hello,
We are seeing our Rp/L measurements take longer than predicted by Formula 10 in Section 9.1.8 of the datasheet.
Our sensor frequency is 4 MHz.
Here are the values we measured experimentally, by using an oscilloscope to measure the time between the sensor waveform turning on and the LDC generating the INTB signal to indicate the measurement is ready.
RESP_TIME Measured Conversion Time
768 270 usec
1536 538 usec
3072 1064 usec
6144 2128 usec
The expected measured conversion time, e.g. for a RESP_TIME of 6144, should be 6144/(3*4e6) = 512 usec.
Can TI explain why my measured conversion time is taking longer than predicted by the datasheet formula?
Thanks,
Arthur