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AD4114 what to do when not using the REF and XTAL pins

Thread Summary

The user asked about handling REF and XTAL pins when not using an external reference or crystal with the AD4114. The final answer confirms that these pins can be left unconnected, but suggests connecting REF(+/-) to AVSS and XTAL1 to DGND if floating inputs are undesirable. The AD4114 includes an internal reference and oscillator, eliminating the need for external components.
AI Generated Content
Category: Hardware
Product Number: AD4114

Hello.

What should I do when not using the REF and XTAL pins?
Is it okay to leave them open?
Also, would a pull-down or pull-up be effective for increased robustness?

Thanks.

  • Hi  ,

    Yes, the REF and XTAL pins may be left unconnected/floating when an external reference or external crystal/clock source is not used. However, if you do not prefer floating inputs, you can connect REF(+/-) to AVSS, and XTAL1 to DGND.

    On the other hand, the AD4114 offers an internal reference and internal oscillator, so no external components are required when used. Pull-up or pull-down resistors are generally used for digital input pins that require a defined logic state.

    Thanks & Regards, 

    Ja

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