I recieved the following questions from a local customer in regards to the AFE5851 Noise Curves.
The application is in a receiver, which receives anywhere from 10kHz through 100kHz, with settable gain. We have multiple channels in a small volume and need at least a 12 bit ADC integrated with the preamp and variable gain amp so the part looks like a good fit. However, the curves of noise, which is important, only reach down to about 100kHz as far as we can tell, which is just past the high frequency limit of our application. So the question is do you have any noise curves below 100kHz, both noise input voltage and noise input current if possible? The second question, is, what is the noise in the 10kHz – 100kHz frequency band when the low frequency noise suppression is implemented, i.e., at address 0[11]? The third question is do you have any distortion curves like figure 28 but for input frequencies in the 10kHz – 100kHz band.
Thanks for the help.
Steve FrisbyTI DBM Utah
we don't have these data. the device is on CMOS process and is not designed for low frequency operation. the noise at low frequency will be slightly high.
the harmonic distortion could be similar in 10Khz to 100KHz band.