Hey guys,
I am looking for a component placed in an amplifier circuit.
On the smd is written „CVV“. I checked several lookup tables but couldnt find something what would fit.
The component is a SOT-363 (SOT-236) and the measured connections are:
Pin 2 and 5 are shortend together (external) and connected via voltage divider to an opamp output. Pin 3 is +5V and Pin 6 is -5V.
My guess is that the component is used for saturation protection or maybe impedance correction.
Pin 4 and Pin 1 are connected via diodes to opamp input.
Other components on the pcb like diodes and transistors are all from fairchild or on semiconductor. So maybe this is the manufacture here as well.
I am looking for a component placed in an amplifier circuit.
On the smd is written „CVV“. I checked several lookup tables but couldnt find something what would fit.
The component is a SOT-363 (SOT-236) and the measured connections are:
Pin 2 and 5 are shortend together (external) and connected via voltage divider to an opamp output. Pin 3 is +5V and Pin 6 is -5V.
My guess is that the component is used for saturation protection or maybe impedance correction.
Pin 4 and Pin 1 are connected via diodes to opamp input.
Other components on the pcb like diodes and transistors are all from fairchild or on semiconductor. So maybe this is the manufacture here as well.
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Any of the configurations in the datasheet for this type of component, maybe a possibility?
https://www.mouser.com/datasheet/2/115/DIOD_S_A0003133187_1-2542147.pdf
https://www.mouser.com/datasheet/2/115/DIOD_S_A0003133187_1-2542147.pdf
Hey Markw4, thanks for your reply.
Yes maybe this is something. I have thought about it before.
But when I measure the component out of the pcb there are not that many diodes. I measure 1-2. cant remember at the moment. Maybe I have to measure again.
Yes maybe this is something. I have thought about it before.
But when I measure the component out of the pcb there are not that many diodes. I measure 1-2. cant remember at the moment. Maybe I have to measure again.
Often these are dual diodes to connected to the supplies for overvoltage protection.
Does that make sense?
Jan
Does that make sense?
Jan
Hey Jan,
yes maybe a bit. What i didn‘t mentioned, there are diodes at the input of the opamp as well for overvoltage protection at the input (i think so, because it looks like a typical clamping circuit).
But I haven’t seen something else before where the output is feedbacked over diodes to the input. At this is what I don‘t understand.
yes maybe a bit. What i didn‘t mentioned, there are diodes at the input of the opamp as well for overvoltage protection at the input (i think so, because it looks like a typical clamping circuit).
But I haven’t seen something else before where the output is feedbacked over diodes to the input. At this is what I don‘t understand.