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AMC60704: VDAC Full-Scale Output Voltage

Part Number: AMC60704

Hello,

I'd like to confirm what the output voltage of AMC60704's VDAC buffer amplifier will be when the VCC[1,2] voltage is below the VDAC's full-scale range.

The data sheet says in the section 7.4.2.2 Positive VDAC Range Mode, "Typically, the positive voltage at the VCC[1,2] pins is dictated by the desired positive output range, but this configuration is not required. In the case where the VCC[1,2] supply voltage is less than the positive full-scale range configuration, the maximum DAC voltage is limited to VCC[1,2]." Does it mean the full-scale range of the output of the VDAC buffer amplifier is proportionally scaled down to nearly VCC[1,2]? Or, is it just that the output of the VDAC buffer amplifier won't go up to the VDAC full-scale range because the output of the VDAC buffer amplifier is clipped to the VCC[1,2] level?

Best regards,
Shinichi Yokota

  • Hi Yokota-san, 

    Your second assumption is correct. The output of the VDAC buffer amplifier won't go up to the VDAC full-scale range because the output of the VDAC buffer amplifier is clipped to the VCC[1,2] level. The output will saturate at VCC[1,2].

    Best,

    Katlynne Jones