AFE4400: Connecting Single-Ended Photodiode to Differential INM, INP Pins

Ven Hsu

Prodigy 30 points

Part Number: AFE4400

Tool/software:

If the photodiode is in a single-ended input configuration, how should it be connected to the INM and INP pins?

Is the connection method for the photodiode as shown in the picture below possible?

Thank you.

4 months ago

+1 Praveen Aroul 4 months ago

TI__Mastermind 49746 points

Hello Ven,

AFE4400 does not support single ended input configuration for the PD. The TIA sets the CM bias on the INP and INM pins.

0 Ven Hsu 4 months ago in reply to Praveen Aroul

Prodigy 30 points

Hi Praveen,

Thank you very much for your reply. Since we have four photo-diodes packaged into a single IC in single-ended form, would it be appropriate to use the AM26L31E if we want to convert them into differential signals? Thank you.

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AFE4400: Connecting Single-Ended Photodiode to Differential INM, INP Pins