Hello,
I chose the MAX14662 for a project I am currently working on.
During testing, I noticed an issue: when I run a signal through one of the 8 switches of the component in an open state, voltage peaks appear at the rising and falling edges of my signal.
As shown in the diagram, my signal is a series of 1 ms-long pulses with a 500 mV amplitude and a frequency of 50 Hz. When the switch is closed, the signal passes through unhindered. However, when the switch is open, I observe voltage peaks at the edges of the signal. These peaks have an amplitude of about 72 mV. I also noticed that with larger signal amplitudes, the peaks increase proportionally.
Setup details:
- Signal source: Function generator
- Connection: Signal passes through one of the switches of the MAX14662 and into an oscilloscope.
- Control: The switch is driven via SPI using an Arduino.
These peaks could significantly influence the final signal in my project, so I need to address them. Here are my questions:
- What could be causing these peaks? Could it be due to capacitive coupling between the switch's input and output?
- Can these peaks be avoided or mitigated without affecting the primary signal?
- If this phenomenon is unavoidable, could you recommend any alternative components better suited for this application?
Your input and recommendations would be greatly appreciated!