Help identifying a sensor (I think)

[pcee]

Oh the joys when things are too small to put adequate identifying markings on them!



Unfortunately, searching for C017 doesn't provide any useful hits, so this is probably a production or lot code.

The package is 2mm x 2mm x ~0.8mm high. The pin layout appears to be 3 along the top and bottom, and 2 along each side, for a total of 10 pins.  The large rectangle toward the bottom right corner is polished and glossy, which is why I suspect it's a sensor.  I was also able to identify SCL and SDA lines, so I know it uses I2C.

So far I've tried searching for QFN10 2x2 sensors, but the Si114x/Si115x sensors have 4 pins on top and bottom with 1 on the sides, rather than the above arrangement.  Is there a package designation that applies only to the 3+3+2+2 arrangement?

Any other ideas for how I could chase this down?

[StillTrying]

Light sensor/meter ?

[amyk]

 Perhaps you could tell us what it's out of and what it measures?

[pcee]

I don't know what the sensor measures, if anything, since the device doesn't have any apparent need for one.

[Neomys Sapiens]

Have you tried to narrow it a bit by the logo? (using a good magnifier should give you a better view than that picture offers, and there are directories for the IC logos on the internet)
Also, that could well read CG17, methinks.

[fzabkar]

Same package?

https://www.st.com/en/mems-and-sensors/pressure-sensors.html

https://export.rsdelivers.com/product/stmicroelectronics/lps25hbtr/stmicroelectronics-lps25hbtr-surface-mount-mems/1106550



FWIW, some hard drives have an analogue barometric pressure sensor in a tiny square grey package with a tiny vent hole (?) in the centre. These devices are marked, from memory, "CO32" or "C032", on both Seagate and Western Digital drives. They consist of 4 strain gauges in a Wheatstone bridge arrangement. The external signal conditioning circuitry consists of two op amps. One amp provides a constant current source for the bridge, the other is a differential amp for amplification and buffering.

[pcee]

Same package?

Wow, that's really close!  I think you're on the right trail.  HLGA-10 seems closer to the right form factor than QFN:  the pads are slightly inset from the edge, unlike QFN.  The pin diagram in the data sheet for that part also matches what I've identified on the board.

The only differences I observe are:

1. The part you found is 2.5mm x 2.5mm, and this part is 2mm x 2mm.  (Edit: The LPS22CH and LPS22HB are both the right dimensions!)
2. The logo doesn't look like ST to me (see below).

Have you tried to narrow it a bit by the logo?

Great idea, I had assumed it was just a circle pin 1 marker!  At your prompting I managed to dig up one more magnifier I hadn't tried yesterday, and got the attached higher-resolution image.  I haven't been able to find that logo in my searches so far.

[fzabkar]

FWIW, these parts appear to have the same pinout, albeit with a missing feature (no SPI):

https://invensense.tdk.com/wp-content/uploads/2018/01/DS-000186-ICP-101xx-v1.2.pdf

Could the pinout follow a standard?

BTW, it might be useful to include "MEMS" in your search terms.


Edit: Could this be it (the logo seems to match)?



https://int.rsdelivers.com/product/wurth-elektronik/2511020213301/wurth-elektronik-2511020213301-surface-absolute/2025924

https://www.we-online.com/catalog/en/manual/2511020213301_WSEN-PADS%202511020213301%20Manual_rev2.1.pdf

https://docs.rs-online.com/0c08/A700000006942877.pdf

[amyk]

I don't think it's a logo, but rather a rough laser-etched pin 1 marker.

[Neomys Sapiens]

I don't think it's a logo, but rather a rough laser-etched pin 1 marker.

Unfortunately you could be right. That earlier picture made it look like a logo. Dang, that is often a very helpful approach.

[fzabkar]

I don't think it's a logo, but rather a rough laser-etched pin 1 marker.

But the markers appear to be etched with the same pattern of bumps(?).

[pcee]

Thank you all for your help!

I think I've satisfied myself that it's a tiny HLGA-10 pressure sensor.  If it turns out it matters whose it is, I can probably figure that out with some I2C sniffing and data sheets.