High Performance Analog Front End InterfacesのトピックRe: P3S0210BQ

P3S0210BQ

JaeHwan — Wed, 23 Jul 2025 04:55:36 GMT

Hi.

I don't know why output voltage drop(VCCP1 & VCCP2 Output voltage : 1.65V).

Using voltage is below.

VCCR : 3.58V

VCCS : 3.3V

VCCE : 3.3V

VCCP1, VCCP2 : 3.3V

1-host : 2-device

host is stm32(Only normal I2C, not I3C)

device is normal eeproms

Thank you.

Re: P3S0210BQ

guoweisun — Wed, 23 Jul 2025 05:03:23 GMT

Could you please help and share with your schematic?

Re: P3S0210BQ

guoweisun — Wed, 23 Jul 2025 05:03:35 GMT

Could you please help and share with your schematic?

Re: P3S0210BQ

JaeHwan — Wed, 23 Jul 2025 05:11:27 GMT

Hi. guoweisun!

Thank you for your fast answer!

1-host(stm32) has above pull-up value.

Re: P3S0210BQ

guoweisun — Thu, 24 Jul 2025 01:55:34 GMT

For the IIC use case you should add the pull up resistors.

Re: P3S0210BQ

JaeHwan — Thu, 24 Jul 2025 03:19:47 GMT

Hi. guoweisun!

Thank you for your fast answer!

1-host have Pull-up.

Re: P3S0210BQ

guoweisun — Thu, 24 Jul 2025 03:22:33 GMT

On both sides need pull up resistors.

Did you add on both sides?

Re: P3S0210BQ

JaeHwan — Fri, 25 Jul 2025 05:04:43 GMT

Hi, guoweisun!

Yes. add on both sides!

above schematics.

Re: P3S0210BQ

guoweisun — Mon, 28 Jul 2025 01:33:43 GMT

For the output voltage drop waveform,can you give clear picture again for better analysis?

Re: P3S0210BQ

JaeHwan — Mon, 28 Jul 2025 03:12:05 GMT

Hi.

Thank you.

Re: P3S0210BQ

guoweisun — Mon, 28 Jul 2025 03:12:45 GMT

Can you zoom in your waveform? I need to see the drop value.

Re: P3S0210BQ

JaeHwan — Mon, 28 Jul 2025 04:35:56 GMT

Re: P3S0210BQ

guoweisun — Mon, 28 Jul 2025 06:13:06 GMT

The input signal is not up to 3.3V.,can you test the input signal disconnect with this P3S0210BQ to confirm whether it's 3.3V signal?

Re: P3S0210BQ

JaeHwan — Mon, 28 Jul 2025 06:44:51 GMT

Re: P3S0210BQ

JaeHwan — Tue, 29 Jul 2025 06:55:25 GMT

Hi. guoweisun!

I solved.

Add 47pF capacitor at Input and output lines.

Thank you.