To follow up my questions from yesterday:
If I can't use the internal analog PGA when the ADC6140 is in active mode, is there a TI part you can recommend that could potentially do this as an integrated digitally controlled front end? Noise from zero-crossing…
Hi, Alwyn,
As shown in the table that you attached, the analog inputs are supported as a single stereo pair (LINx and RINx) or as a mixed stereo pair (LIN1 + LIN2 and RIN1 + RIN2). The mono input is dedicated for the mono output, which cannot be used…
Hi Wu,
Have you considered PGA2500, PGA2505, or PGA2311 for this application? All are audio PGAs with gain steps of 3dB or less, and would offer sufficient bandwidth for audio signals in a conferencing application.
Hi ttd,
I errored. I had the PGA2500 and PGA2505 datasheets open at the same time and was looking at the PGA2505. The minimum gain setting of the PGA2500 is 10 dB, not 9 dB. Then, the only way to keep the PGA2500 distortion low is to reduce the input level…
Hello Stefan,
It sounds like you've done a significant amount of investigating into this pop issue. Thank you for all the detailed information. I'd like a bit more clarification on the failures, specifically:
What is the total number of units…
Hi Jonathan,
I was forwarded some additional information from the local sales team about your application. We worked together and wanted to suggest the PGA2505 for your application. Here's some information about the PGA2505.
PGA2505 :
Allows for…
Other Parts Discussed in Thread: PGA2505 , PCM1861 , PCM5142 , PCM1863 Hi,
I'm currently designing something around the AIC3254. The input would be fully differential from a dynamic mic (i.e. an SM58 or similar). I'm worried about noise with the PGA's turned…
Other Parts Discussed in Thread: PGA2505 , PCM4202 Hello,
*** This is in hurry, please give me your advice withi 2days... ***
My Customer use PGA2505 and PCM4202 in their audio product Pre-Pro stage.
PGA2505's Vcom is set to AGND. ( as PGA2505 data sheet…
Other Parts Discussed in Thread: PGA2500 , PGA2505 Hello there,
We have a product with eight PGA2500 integrated in daisy chain communication topology.
During the last production batch of 50 products, 5 devices (out of the total of 400) spread over those…
Thomas,
You may want to consider the PGA2500 or PGA2505. These devices are intended for Low-Z microphone inputs have digitally controlled gain. This would greatly simply the gain switching in high gains all the way down to G=1. You would need to switch…
