I’m trying to setup the IX503 linear light sensor (Datasheet attached). This is the first attempt at using a digital sensor that outputs more then one data value at a time. So would like some help making sure I do it right. At $3 a piece I bought a few extra just in case I mess up. Any help would be appreciated.
Looking at the circuit I notice it requires electrolytic capacitors. I’ve never used them before and am reading about them. I’m unsure what makes them required over a ceramic or tantalum capacitor that is rated to the capacitance and can handle the prescribed voltage. I know not all capacitance materials are equal (Mica / Quartz can be more stable over a broad temperature etc.) but I don’t know the advantage of an electrolytic capacitor. Especially at such a low capacitance (10 uF / 22 uF) as their main use seems to be easily scaling to large capacitance values.
The white sheet makes it seem like the RSSW pin should be set to ground if I want Internal RS depending on how I want my out going pulses to be. The thing I don’t get is why would I choose to have the RS External? Those pulses look hella weird so I don’t get why I would even consider doing that. The default configuration circuit also seems to have it disabled so … ya … why would I want signals like in the external mode?
Looking at the ROG clock it seems to be just used for a single pulse to trigger a read from the chip. Is that correct? Or do I need a 1 MHZ clock on it also? White paper confuses me a bit on that. If I have to trigger it myself will a simple PIN ON → PIN OFF cycle do it?
I think this IC might only read (Light or No Light) as I didn’t notice it said B/W on it at first. If so it will still work for my application but didn’t notice that in the datasheet at first … is that what it looks like to everyone else? As looking at the mosfet in the circuit … that would be a pure digital signal with no voltage difference … just On / Off if I set it up like that. Is that correct?
Looking at a few other CCD’s that are like $8 a piece … they seem to vary the voltage and not have the mosfet there … so ya : / think that is correct.
IX503 Datasheet.pdf (200 KB)