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About the AD7450 data sheet in Figure 14

Mochi
on Jun 18, 2018

Hi
Approximately the same figure is posted on the data sheet of AD 7450 and AD 7450 A.
However, I think there is a mistake in the figure of the AD 7450 data sheet.
My customer is completely confused. I want an engineer's ruling.

AD7450 Rev.A (AD8138 INV.OUT to AD7450 Vin+)

 

AD7450A Rev.D

 

Best regards

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    •  Analog Employees 
    on Jun 19, 2018 2:01 AM over 2 years ago

    Hi Mochi,

    There no significant effect if the signal is inverted or not especially in AC performance. But I recommend to use the circuit in figure 34 of AD7450A Rev D datasheet where in the non-inverting output of the amplifier is connected to non-inverting input of the ADC and the other way around with inverting output of the amplifier and inverting input of the ADC.

    Regards,

    Daryl

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  • 0
    •  Analog Employees 
    on Jun 19, 2018 2:01 AM over 2 years ago

    Hi Mochi,

    There no significant effect if the signal is inverted or not especially in AC performance. But I recommend to use the circuit in figure 34 of AD7450A Rev D datasheet where in the non-inverting output of the amplifier is connected to non-inverting input of the ADC and the other way around with inverting output of the amplifier and inverting input of the ADC.

    Regards,

    Daryl

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