Hello,
I'm designing a PCB and I wanted to turn off/on ADC(ADS1120) using microcontroller (SAMD21G). The ADC has two power inputs, 3.3V analog and 3.3V digital. The 3.3V analog is connected to an LDO that has an enable pin which is connected to one of SAMD21G pins, so that power pin I can turn on and off. For the 3.3V digital however, I can't turn on and off the LDO as it connects to other components. So, I was thinking about using two MOSFETS one PMOS connected to 3.3V digital with its gate connected to the drain of an NMOS (with gate connected to pin of SAMD21G) that way it acts as kind of an enable. Also thought about using a tri-state buffer with enable pin (connected to SAMD21G), not sure if that is a good idea though. Any other ways I could do that, and which would be the best way? Thanks in advance!
I'm designing a PCB and I wanted to turn off/on ADC(ADS1120) using microcontroller (SAMD21G). The ADC has two power inputs, 3.3V analog and 3.3V digital. The 3.3V analog is connected to an LDO that has an enable pin which is connected to one of SAMD21G pins, so that power pin I can turn on and off. For the 3.3V digital however, I can't turn on and off the LDO as it connects to other components. So, I was thinking about using two MOSFETS one PMOS connected to 3.3V digital with its gate connected to the drain of an NMOS (with gate connected to pin of SAMD21G) that way it acts as kind of an enable. Also thought about using a tri-state buffer with enable pin (connected to SAMD21G), not sure if that is a good idea though. Any other ways I could do that, and which would be the best way? Thanks in advance!
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