I get this PCB to make use of the Avago APDS-9007 as I can't attach wires o the sensor without a PCB. The PCB convert the current output to volltage which is OK but would like to identfy the components on the PCB.
That is the ADPS-9007 light sensor if I'm seeing things correctly. It puts out current and the PCB converts to volts like you thought. Transimpedance amp.
Am I missing something- are you pointing at something else? (Also, Broadcom bought this product line and most others from Avago- formerly HP )
I know the Avago sensor but what are the other compoents. I try to find out the output impedance of the circuit.
Your red circle threw me off. Your picture doesn't have enough resolution to read the back marks or part nos. on the IC's. Ring it out a bit and maybe draw at least a partial schematic- it will start to make sense. Its most likely a linear regulator IC and an OP_AMP. if you can zoom in a bit and get some connectivity/netlist and backmarks, it would help a lot. That sensor makes a current, you feed its output to a resistor to convert to volts but better a low voltage referenced transimpedance amp. The output impedance will be quite low- <500 ohm depending on whether they put a resistor in series to make it more rugged for hobbyists. Ring it out.
Perhaps this is a little bit better
I need to identify the other components not the light sensor.
What do you even need to identify here? The one with 33 marking is obviously a 3v3 regulator, and one with OA marking is an opamp. Both use common standard pinout and I don't think the exact part number matter that much here (within reason). The only thing remotely critical here is the 51k current shunt.