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TLV5638: REF input range vs. VDD supply voltage

Part Number: TLV5638

Hi team,

I would like to see if REF input is 2.5V, VDD should be greater than 4V. But, my customer saw, with VDD=3.3V, TLV5638 can also output 2.5V range. How to understand the relation between REF input range and VDD supply voltage?


  • Hi Jerry,

    The device will likely work with VREF = 2.5 V and VDD = 3.3 V, but some specifications might suffer, like INL and output current sink/source, load regulation, and THD/SNR.  The device expects some headroom for the output amplifier, so it is important that it is provided.