OPT3001: OPT3001 EVT SCH and layout review

Hi Poki,

page 2 of the datasheet has a revision history section. Is this what you are looking for?

Will also get back on design. What is the end product/application?

Best,

Alex

Hi Alex:

1. No

Errata document mean by your latest datasheet, but there is still some wrong part inside, you will have another document that mention those wrong part and correct result, I have ask DRV2625 and you feedback no Errata document (), I think Arthur know what is Errata document, you can check with him. 

2. It's wearable device

Thank you~~

Poki

Hi Alex:

Thanks feedback

So how about our SCH and layout?

Poki

Hi Poki,

The pull resistor values seem a bit strange to me. Of course i2c pull up resistance should be checked against bus capacitance, but I see you already have strong pullups. What is the reason for two sets of pull up resistors? Using two sets of 2.2k giving 1.1k is a pretty strong pull up so wanted to ask about the reason there. Also I see the INT pin is pulled up with 100k ohm, which is very weak. I would recommend changing INT to not more than the 10k recommended in the datasheet. In terms of layout I'm not sure there is much I can check there. I see the OPT, decap looks good, and the series i2c 0ohm resistors. I don't see the pull ups so pretty much just able to check OPT pins and decap.

Best,

Alex

Hi Alex:

The R108, R109 and R467 has a green word "NM" with it mean we didn't place this element, just reserve for space.

So at I2C1 there is only R463/R464 2.2K pull up resistor, and we use MCU with internal pull up 13Kohm for INT.

Poki