AFE4400: afe4400 query

anish singh1

Prodigy 180 points

Other Parts Discussed in Thread: AFE4400

1.) Which register to use LEDx or LEDx-AMB for better signal processing?

2.) Afe4400 datasheet mentions 13 Noise free bits? Please elaborate.

3.) TIA_AMB_GAIN setting is common for LED1 and LED2.

4.) Below register is misconfigured in afe4400evm or register definition in the datasheet is incorrect

AFE4400_CONTROL1 000101 --------------------> bit-1 must be set

over 5 years ago

0 Prabin Yadav over 5 years ago

TI__Genius 12575 points

Hi Anish,

Here are the answers,
1) LED-AMB will be better because it suppresses ambient light modulation up to certain extent.
2) Noise Free bits describes the accuracy of the ADC or its noise. For further reference you can refer to following post.
www.eetimes.com/document.asp
3) Yes
4) Thank you for pointing out, we will update the EVM in next release.

Regards,
Prabin

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AFE4400: afe4400 query