• AD5254: FAQ

    FAQ

  • AD5254 - different VDD and I2C bus voltage

    Q 

    Is it possible to have VDD for the AD5254 set to +5V but run the I2C bus to the
    AD5254 at 3.3V ?

     

    A 

    In the specifications section we specify that for VDD = 5V, the minimum logic
    high voltage required is 2.4V:
    In other words, 3.3V logic should work…

  • Do the AD5254 adjustable resistors have galvanic isolation?

    Q 

    Are the adjustable resistor connections (e.g. A0, B0, W0) galvanically isolated
    (separated) from the digital system ground (DGND/VSS) without any hard internal
    connections on the chip?

     

    A 

    These terminals, A0, B0, W0 are not isolated. All the AD5254…

  • About AD5254 Input and output Digital Voltage

    Hi,

    My customers are considering using the AD5254.
    So I got a question.

    What voltages can I apply to the SCL pin and how many A can be applied?
    "Digital Inputs and Output Voltage to GND" is stated as "0 V, 7 V", is this the same idea as the one confirmed…

  • RE: AD5254 50K vs 1K

    This question has been assumed as answered either offline via email or with a multi-part answer. This question has now been closed out. If you have an inquiry related to this topic please post a new question in the applicable product forum.

    Thank you,
    …

  • RE: About BIT BANG for AD5254

    This question has been assumed as answered either offline via email or with a multi-part answer. This question has now been closed out. If you have an inquiry related to this topic please post a new question in the applicable product forum.

    Thank you,
    …

  • AD5254 I2C port drive strength

    Hi all,

    I'd like to determine a suitable series resistor value put on I2C lines of AD5254.

    Therefore, could you tell me typical drive strength (output current) of I2C interface of AD5254 and its IBIS model?

    Best Regards,

    TM

  • AD5254 power-on problem

    Hi,

    I'm facing a problem with digipot AD5254 on my board where I use them as a part of programmable amplifiers in op amp feedback path. Usually during power-on sequence (after turning power supply on) digipot wrongly writes values 0 or 255 in some…

  • AD5254 - Unwritable eeprom and rdac

    Preemptive apology for being so basic.

    I'm using i2c to talk to an AD5254 from a RaspberryPi - spent last night rebuilding the kernel to enable device tree mode and add the digipot driver, and to my joy this morning I can see all of the eeproms and rdacs…

  • Questions about AD5254 digiPOT

    Hi,

    I want use AD5254 digital potentiometer(http://www.analog.com/en/digital-to-analog-converters/digital-potentiometers/ad5254/products/product.html) in my project design, but I don't know how to program it.

    I have never programmed I2C before…