ku637
Advanced Member level 4
Hi ,
I'm using a pressure sensor having I2C connectivity
**broken link removed**
I have seen the VOL value specified in datasheet for MPL3115A2 for SDA lines as VOLS = 0.1VDDIO specified for Io=500uA i.e 0.33V @ Io=500uA as Im using VDDIO 3.3V.
I have pull up resistors of 10kOhm connected.I want to analyse the variation in VOL value i.e close to my actual sink current 3.3/10k=0.33mA approximate.
Is it possible to estimate the VOL values at this current. ?
Or can i take it like Rds on of MOSFET =0.33/500uA=660 Ohm
and use it to calculate the VOL @ 0.33mA as 0.33mA x 660Ohm =0.2178V Will it be correct?
i.e i decreased current from stated 500uA to 330uA and VOL value decreased from 330mV to 217mV.
I hope this estimation is correct .
Any comments please.
I'm using a pressure sensor having I2C connectivity
**broken link removed**
I have seen the VOL value specified in datasheet for MPL3115A2 for SDA lines as VOLS = 0.1VDDIO specified for Io=500uA i.e 0.33V @ Io=500uA as Im using VDDIO 3.3V.
I have pull up resistors of 10kOhm connected.I want to analyse the variation in VOL value i.e close to my actual sink current 3.3/10k=0.33mA approximate.
Is it possible to estimate the VOL values at this current. ?
Or can i take it like Rds on of MOSFET =0.33/500uA=660 Ohm
and use it to calculate the VOL @ 0.33mA as 0.33mA x 660Ohm =0.2178V Will it be correct?
i.e i decreased current from stated 500uA to 330uA and VOL value decreased from 330mV to 217mV.
I hope this estimation is correct .
Any comments please.