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DAC60096: Supply current in RESET

Steve Widener
Genius 10005 points
Part Number: DAC60096

What is the device supply current when reset is held low? We have a situation where several DAC devices are on the same SPI bus and only one needs to be turned on a time.

If several DAC60096 devices are connected to the SPI bus, does holding some of the devices in RESET impact the SPI communications?

  • 0
    TI__Guru 53303 points

    Hi Steve,

    We did not originally characterize the device in this condition.  I can check on the EVM to give you a general idea of the current and the RESET behavior.

    I am interested in the application as well.  Can you reach out to me over email to discuss it?

    Thanks,

    Paul

  • 0 in reply to Paul_Frost
    TI__Guru 53303 points

    Hi Steve,

    Asserting the reset input does not reduce current consumption from the normal, post-reset current.  The best way to reduce current consumption if the device is not in use is to either power it down or reduce the reference voltage.  The majority of the power is from the R2R ladder and reference buffers.  Reducing the reference voltage changes the voltage across the resistive load of the R2R ladder so that the total power is lower. 

    The nominal current of the VCC and VSS inputs is about 17mA with the 1x load as shown in the datasheet.  With VREF=0V, I measured about 3.5mA on the supplies.

    Thanks,

    Paul