Hello everybody, i have a question about the input analog section of this IC. I quote directly the datasheet
"The differential amplifier input stage of the AMC3306M25 feeds a second-order, switched-capacitor, feedforward
ΔΣ modulator. The gain of the differential amplifier is set by internal precision resistors with a differential input impedance of RIND."
Is there any kind of information about the gain VALUE of this pre amplification section??
Thank you all in advance
Hi Lorenzo,
The gain value is set by the input voltage range of the device, 250mV for the AMC3306M25, and the input voltage range of the modulator. I cannot disclose the input voltage range of the modulator as it is proprietary information. The output data stream will be proportional to the input voltage range as discussed in section 7.3.4. This output data must then be fed to a digital filter to realize the proportional input value.
This document may help with your digital filter design: https://www.ti.com/lit/an/sbaa094/sbaa094.pdf
Please let me know if you have additional questions.
