Author Topic: Low cost transimpedance amplifier  (Read 657 times)

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Offline girishvTopic starter

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Low cost transimpedance amplifier
« on: September 25, 2022, 02:36:44 am »
I am a newbie in analog electronics. I need to build a Transimpedance amplifier for a photodiode.

Frequencey: 10KHz

Photodiode
Reverse Light Current: 1nA
Reverse Light Current: 3µA (Typical)

I have TI LM2902LV in my inventory.
Architecture: CMOS
Channels: 4
GBW: 1MHz
IB: ±15pA
IOS: ±5pA

I want to use LM2902LV as Transimpedance amplifier. I can limit the gain to stay within GBW limit and use additional channel for additional gain if need. Can I use LM2902LV?

Girish
 

Offline ledtester

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Re: Low cost transimpedance amplifier
« Reply #1 on: September 25, 2022, 03:25:48 am »
Here is a TI app note on designing a transimpedance amplifier for amplifying the light-dependent current of a photodiode:

Photodiode amplifier circuit - SBOA220A
https://www.ti.com/lit/an/sboa220a/sboa220a.pdf

 
The following users thanked this post: girishv

Offline Terry Bites

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Re: Low cost transimpedance amplifier
« Reply #2 on: October 03, 2022, 12:10:08 pm »
 


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