Tool/software:
Hi Team,
What is the VOH level for ADS1119 I2C and DRDY lines?
Thanks and Regards,
Vidhya
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Tool/software:
Hi Team,
What is the VOH level for ADS1119 I2C and DRDY lines?
Thanks and Regards,
Vidhya
VOH is determined not by the pin but by the pull-up resistor (if there is any), so the datasheet cannot tell you about it. VOH will be much lower than the pull-up voltage because of the voltage drop over the resistor, depending on the current.
Hi Vidhya,
There is no VOH level spec for the ADS1119.
Since the digital interface of this device is I2C, it has an open-drain architecture. Meaning that when the SDA output is high (1), the device simply releases the SDA line and SDA (VOH) will be pulled up to VDD by the pull up resistor.
Same for DRDY.
Best Regards,
Angel
Hi Vidhya,
If pull up voltage is 3.3V, you could consider VOH = 3.3V.
The device however does not drive the logic high, as this is dependent entirely on the pull up resistor.
You can take a look at the following video that explains how the I2C protocol works.
Precision labs series: I2C | TI.com
Best Regards,
Angel