Linear Light Sensor some help with planning and understanding

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.

Question 1
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.

Question 2
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?

Question 3
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?

Question 4
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)

Question 1 Looking at the circuit I notice it requires electrolytic capacitors. Perhaps they are used because they are relatively inexpensive.

Question 2 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?

I would got with the internal RS

Question 3 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?

Looks that way to me, too. Clock ROG low once (at least 50 nanoseconds) and then CLK out the 2087 signals. I'm not sure but it looks like the output voltage has an offset of 4.5V and goes lower from there. The 'saturation output voltage' is nominally 1.8V to that may mean the output pulses go from 4.5V (full black) to about 2.7V (full white). I guess that is before the transistor driver they show in the application circuit.

Question 4 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?

I don't see a mosfet. I see a transistor. The output appears to be analog. If you have a oscilloscope handy it should be easy to see the voltages coming out and picking an appropriate A/D converter.