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AMC0311S: P2p with ADuM4195

Brian Wang0928
Genius 14680 points
Part Number: AMC0311S
Other Parts Discussed in Thread: AMC1351-Q1

Team,

Could you help to comment on the p2p compatible device with ADuM4195-1 device? It looks AMC0311S is not exact the same device, right?

Here's current layout placement of ADuM4195. Thanks. 

 

 

 

image.pngT

 

  • 0
    TI__Expert 3561 points

    Hello,

    these devices have same functionality but different specification. For example. the ADUM has input voltage range 0.25 to 4.3V when powered from 5V (the linear range). The AMC device has half the input range but the linear range goes down to zero. 

    However, it should be possible to adapt the circuit to use the AMC0311S.

    * Adjust the amplitude of the input signal using e.g. a resistor divider

    * connecting the pin 6 to GND.

    Best regards , Jiri

  • 0 in reply to Jiri Panacek85
    TI__Genius 14680 points

    Hello Jiri,

    From my understanding, neither device is functionally compatible, correct? This means they cannot be included on the same BOM list once the software is finalized, right?

    If that's the case, will the team consider developing a pin-to-pin compatible device with ADuM4195-1 in the future?

    Thank you!

    Regards

    Brian

  • 0
    TI__Prodigy 400 points

    Hello Brian,

    To add onto Jiri, I have attached a comparison table with the AMC0311S/R vs ADUM4195 that can hopefully provide some more information on the differences 

    You are correct, neither device is functionally compatible with each other, ******(edited)******

    You can decrease the input voltage range to match the AMC0311S but lose half of the full scale range of the ADuM4195-1.

    Furthermore, we have the AMC1351-Q1, which has a 0-5V input range similar to the ADuM4195-1, but it has a gain of 0.4V/V instead of 1 V/V for the ADuM4195-1.

    AMC0311R_S vs ADUM4195.pptx

  • 0 in reply to Brian Wang0928
    TI__Expert 3561 points

    Hi Brian, it is a matter of wording. In my opinion, these devices are functionally same - they are isolated amplifiers using a delta sigma modulation to cross the isolation barrier. Both parts transfer analog signal across the isolation.

    What is different is the specification (e.g. input and output voltage ranges). This means that these devices are not pin-to-pin (p2p) compatible. 

    The engineer would need to slightly modify the hardware (or software). I can't judge the impact without the complete circuit diagram. 

    Please note that you ask on the public e2e forum. Avoid posting sensitive customer information here.