Hello,
I'm trying to decide which configuration of the ADS8343 will result in less noise on the device. On my layout, I currently am only using one of the input CHX channels (CH0), while the others are left floating. CH1 runs to a 16-channel mux and so the CH1, CH2, and CH3 channels are not used or needed. I will keep the ADC in the single-ended channel select state for CH0 only. In this configuration is it better from a noise perspective to ground the unused CHX inputs via wiring changes on the PCB or should I leave them floating?
What is your input signal (for ADCs)- One used ADC channel (CH0) which connects to the output of a 16-channel mux. Switches between housekeeping channels (voltage monitors, etc.) which range of 0-5V. CH1, CH2, and CH3 unused and floating in the current layout.
- Reference voltage
- +2.5V
- Input and reference drive circuits
- Info available if needed
- Register settings used (if applicable)
- Info available if needed
- Digital control pin settings (i.e. Reset, Power Down, Start, etc.)
- Info available if needed
- Supply voltages
- +5V
- Schematics & layouts (attached within the post in case your design is not confidential or submitted by direct email topa_deltasigma_apps@ti.com with reference to post)
- Info available if needed