Timeline for LM393 comparator only connects to GND
Current License: CC BY-SA 4.0
7 events
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| Jan 3, 2020 at 20:17 | history | edited | Spehro 'speff' Pefhany | CC BY-SA 4.0 |
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| Jan 3, 2020 at 20:04 | comment | added | TI_Lover | While it is important to observe the input common mode range, that typically just results in non-linear performance. It would not cause the problem AMD is seeing here. @amdmoual, the comparator you have selected cannot output HIGH on it's own. It has an open collector output that can only go LOW. To output HIGH, there has to be an external pull up resistor on the output pin. | |
| Jan 3, 2020 at 19:52 | comment | added | Spehro 'speff' Pefhany | You must keep the voltage at the inputs within the range 0V to V+-1.5V for it to work properly. That's what "Input Common Mode Voltage Range" means. | |
| Jan 3, 2020 at 19:51 | comment | added | amd moual | ok i will try that thank you very much | |
| Jan 3, 2020 at 19:51 | history | edited | Spehro 'speff' Pefhany | CC BY-SA 4.0 |
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| Jan 3, 2020 at 19:50 | comment | added | amd moual | isnt it supposed to be sensitive as 0.1V difference ? | |
| Jan 3, 2020 at 19:48 | history | answered | Spehro 'speff' Pefhany | CC BY-SA 4.0 |