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CD4052B: CD4052 with LMH6612

AD
Intellectual 320 points

Part Number: CD4052B
Other Parts Discussed in Thread: LMH6612, TMUX1109, TMUX1209

Hi TI Expert,

I currently have a circuit configured as:
Hall Current Sensor → LMH6612 → ADC → FPGA.

image.png

I need to expand this design to support multiple current sensor channels while sharing the same LMH6612 and ADC.

Would it be a good approach to connect multiple sensors to a CD4052 multiplexer, and then route the output of the CD4052 to the LMH6612 and ADC?

Thank you for your guidance.

  • 0
    Guru 325560 points

    Yes, you can use an analog multiplexer for this.

    As far as I can see, you have signals between 0 V and 5 V, so you can use a mux with a smaller supply voltage range.

    Please note that the multiplexer has a certain resistance, which is not constant over the input voltage range. It might be a better idea to use a mux with a very low on-resistance, e.g., TMUX1209 or TMUX1109.