TLV320ADC5120: the design purpose of different input impedance

Hey Shubiao,

Thank you so much for your question. This would be looked into and would receive a detailed response in the next 24-48 business hours. 

Best regards,

Ore. 

Hey Shubiao,

There is a variety of different input impedances on the TLVADC5120 to accommodate the single-ended or differential signal coming into the device. This could also be considered when operating input signals at specific gains. 

Best regards,

Ore. 

Ore,

Thanks for your update. 

would you explain more details about " accommodate the input signal into the device", specific examples would be great for me to understand how to adjust the 2.5k, 10k, 20k input impedance. 

besides, as you have mentioned the gains, what's the relationship between gain and input impedance?

BRs,

Shubiao

Sakshi, 

does it mean, a higher input impedance allows a lower cut-off frequency of the HPF, however, it would bring more noise.

so it is a trade-off between the cut off frequency and noise, am i correct?

BRs,

Shubiao