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Formula for ADR0x TRIM resistors

TedH4faro
on Oct 20, 2017

I would like to use the TRIM pin with fixed resistors rather than a potentiometer to set the ADR01 output to a voltage other than nominal, within the specified adjustment range.  Is there a formula to determine the appropriate resistor values?  I could breadboard it then measure the potentiometer setting, but if you can provide a formula, that would be quicker and easier.

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  • 0 on Nov 17, 2017 7:29 PM

    I am using the ADR01 to generate a 10V reference input to a DAC.  I am using an AMP03 to produce the -10V reference.  I was getting some glitch noise on the DAC output, so, I added a lowpass filter to the negative reference input.  The reference input has an input resistance, so my filter was causing a slight attenuation in the reference voltage.  The 10.03V figure is to compensate for this loss.

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  • 0 on Nov 17, 2017 7:29 PM

    I am using the ADR01 to generate a 10V reference input to a DAC.  I am using an AMP03 to produce the -10V reference.  I was getting some glitch noise on the DAC output, so, I added a lowpass filter to the negative reference input.  The reference input has an input resistance, so my filter was causing a slight attenuation in the reference voltage.  The 10.03V figure is to compensate for this loss.

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