Team,
The datasheet is only showing the digital input threshold levels for 2.2 V and 3.0 V supply. How are these levels if VCC=2.8 V?
Thanks,
Robert
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Team,
The datasheet is only showing the digital input threshold levels for 2.2 V and 3.0 V supply. How are these levels if VCC=2.8 V?
Thanks,
Robert
Hi Robert,
The threshold values tend to be a ratio of your VCC levels. Here are my approximations for 2.8V. (A curve can be created if you need a higher accuracy for the min and max thresholds)
Positive Input Threshold | |||||
VCC | Min | Min Ratio | Max | Max Ratio | |
2.2 | 1.2 | 0.545 | 1.65 | 0.75 | |
3 | 1.65 | 0.55 | 2.25 | 0.75 | |
Approximation | 2.8 | ~1.53 | 2.1 | ||
Negative Input Threshold | |||||
VCC | Min | Min Ratio | Max | Max Ratio | |
2.2 | 0.55 | 0.25 | 1 | 0.4545 | |
3 | 0.75 | 0.25 | 1.35 | 0.45 | |
2.8 | 0.7 | ~1.26 |
Regards.
Luke
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