I work for a Medical device R&D company. We are currently working on a project where we are trying to detect physiological signals deep under the skin using IR which requires an emitter to detector distance of 4+ cm. Because of this, we need to use a large amount of current through the emitter to get deep enough and your ADPD10X components look like they could work. I got the eval board for the ADPD105 but it doesn't seem to let you use all the functions the chip has to offer. I wanted to try the digital integration mode but when I do the graph doesn't work. So first off, I am wondering if I am doing something wrong or if the eval only allows limited use. Second, I noticed you now have the new ADPD108 that is recomended for new designs but the datasheet looks the same as the ADPD105 so I was wondering what the difference is. lastly, when I looked at the datasheet for the eval board for the ADPD108, the schematic shows an ADPD107 but the text says ADPD108. I am just a little confused about that. Also, How can I obtain an eval board for the ADPD108, there is no buy option.
The digital integrate mode should have no problem working with the Wavetool software so I suspect you have something in your configuration that is not right. At the bottom of the email I've attached a set of register writes for using digital integrate in timeslot B. Which evaluation board and wavetool version are you using?
The ADPD1080 has better noise and power performance than the ADPD105. It also has the addition of float mode which is described in the datasheet and is an excellent operating mode for very low CTR conditions. However, the ADPD1080 does not support digital integrate mode so if you are convinced you would like to use that mode then you would need to stick with the ADPD105. Either way, we have found no performance benefits to using digital integrate unless you have a very low bandwidth sensor that requires long LED pulses. The ADPD10x series is optimized for the best performance with short LED pulses of 2us or 3us. This also gives the best ambient light rejection.
00 000001 00FF02 000506 070009 00C810 000011 312012 005014 011515 011018 1FE019 3FFF1A 3FFF1B 3FFF1E 00001F 3FFF20 3FFF21 3FFF22 303023 103524 303025 02D030 021931 081334 000035 082536 084038 000039 19F43B 62143C 700642 1C3643 ADA544 1D3545 AE654B 269A4D 005E4E 00404F 20D050 004054 8AA055 E00058 20005A 00405F 00013E 032037 00003F 032059 68085E 6808
Device has some really interesting features:
I believe these stats are pretty good for ADPD105:
Well-known problem related with ADPD108, follow Buckley's advice, it solved my problem it should help you as well.