hello guys,
I want to know how can I find correct feedback resistor value in an transimpedance amplifier.
I know for example a photodiode as input:
Vout=Id x R
which parameter in datasheet used for calculating feedback resistor value?
Thanks
Probably trial-and-error (or use a potentiometer), especially since you probably don't know how much light is hitting the photodiode.
...You may not want to use a pot "permanently", but it could make the experimenting easier.
What amplifier are you using - A standard voltage opamp or a current type?
Allan
allanhurst:
What amplifier are you using - A standard voltage opamp or a current type?Allan
I'm using MCP601.
I want to know how can I find correct feedback resistor value in an transimpedance amplifier.
I'm using MCP601.
The MCP601 is not a transimpedance amplifier.
Grumpy_Mike:
The MCP601 is not a transimpedance amplifier.
see page 15 of datasheet
typical application - photo detection
navab1362:
hello guys,
I want to know how can I find correct feedback resistor value in an transimpedance amplifier.
I know for example a photodiode as input:
Vout=Id x R
which parameter in datasheet used for calculating feedback resistor value?
Thanks
R = Vout/Id
The output voltage desired divided by the diode current that should produce it. If you want 1V per microamp,
use 1 megaohm.