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ISO7762 Power dissipation

Pedaiah G
Prodigy 40 points
Other Parts Discussed in Thread: ISO7762

Hi,

We are using a "ISO7762FDBQR" Digital isolator in an industrial device on SPI and UART signals.

1. What will be the power consumption and dissipation of the isolator at ambient and at +70 deg?

SPI Max operating Speed: 6Mbps

Primary side supply: 3.15V

Secondary side supply: 3.3V

2.How Data speed impacts the power dissipation? Any relation?

Regards,

Pedaiah G

  • 0
    TI__Genius 17895 points

    Hello, 

    Thank you for your questions.

    We have data on the datasheet that provides more insight on the data-rate and current consumption at 3.3V. The current consumption vs data-rate was tested over the recommended operating conditions (see table below), meaning the temperature range (-55°C to 125°C) already includes 70°C.

    The current consumption for the test conditions listed below is typically ICC1 = 5.2 mA and ICC2 = 5.4 mA while the maximum values are ICC1 = 7.1 mA and ICC2 = 7.5 mA. These values should also equally apply to the test conditions you have listed.

    VCC1 = VCC2 = 3.3V ± 10%
    Datarate = 10Mbps
    CL = 15pF

    Please refer to the table below for more details on current consumption of the ISO7762 device for different data rates:

    Regards,
    Aaditya Vittal