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DAC43608: Digital input range vs I2C VIL specification

Part Number: DAC43608

Hello team,

I have a quick question if the DAC43608 digital input range may not cover the I2C VIL specification.

We can find that the DAC43608 accepts VIL up to 0.5V.

On the other hand, the I2C spcification defines VIL as up to 0.3xVDD as follows.

For example, when the VDD is 3.3V, the I2C should be able to accept up to 0.99V as the input low. 

Does it mean that the DAC43608 can't accept the I2C stardard for the VIL in all VDD range or can we expect to take some voltage margin at higher VDD(e.g. 3.3V)?

Regards,

S.Sawamoto

  • Hello Sawamoto-san,

    The VIL spec for the DAC43608 is independent of the DAC supply (VDD). If VDD is 3.3V then anything below 0.5V will be accepted as logic low for the DAC. A VIL of 0.3*5V will not be registered as a logic low if the DAC supply is 5V, it still needs to be below 0.5V. 

    Best,

    Katlynne Jones