While using ADN2830, we found the PD current from laser is lager than 2000 uA. However, the photodiode current
ADN2830 can receieved is less than 1200uA. Than, how can we use the ADN2830 to driver this laser?
Dear Mr. Zhou,
Thank you for being interested in ADN2830.
Yes, ADN2830 MPD current detection range is from 50uA upto 1200uA.
If you know your laser MPD current operation range, you might use the max. MPD current
vs. 1200uA to find out a divide down ratio, say Beta. You might need to divide down the min. MPD
current by Beta to see if the resulted current is larger than 50uA.
If yes, you can design one current mirror circuit with the Beta as the current divide down ratio,
then connect the MPD to ADN2830 with this current mirror circuit.
Or contact us to get the ADN2830 support with your selected laser diode datasheet.
Dear Mr. Yang,
ADN2830 can only accept MPD current from 50uA to 1200uA. If you need to deal with a MPD current that extends to 2000uA, you need one external current mirror. Please contact our local sales team or contact me at firstname.lastname@example.org. We can discuss this ADN2830 applications issue off-line.