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TINA/Spice/AMC1311-Q1: Input voltage range, spice model

Oliver Kim7
Expert 3040 points
Part Number: AMC1311-Q1
Other Parts Discussed in Thread: TINA-TI, , AMC1311

Tool/software: TINA-TI or Spice Models

Hello team,

I simulated AMC1311-Q1 with +1/-1 V sine wave. But why it shows normal operation?

As far as I know, input range of AMC1311-Q1 is -0.1V to 2V. 

In datasheet, there are absolute input voltage, specified linear input full-scale voltage, Input voltage(absolute maximum ratings)

I can't understand what exactly the three terms are different. Could you please explain the difference and what is real input range of AMC1311-Q1? 

Based on my knowledge,

input voltage: input voltage range which enables very basic operation, but cannot 

specified linear input full-scale voltage: voltage range which guarantees 

input voltage(absolute maximum ratings): break down voltage range (Device cannot be recovered)

Is this right?

One more thing, does AMC1311 TINA simulation model in ti.com mean AMC1311-Q1 or AMC1311B-Q1?

I heard the difference of two devices are accuracy related spec. Is this accuracy spec reflected in TINA simulation model?

Thank you.

Regards,

Oliver Kim

  • 0
    TI__Mastermind 49231 points

    Hi Oliver,

    Thanks for your post and bringing this to our attention!

    I will have to verify that the performance on the bench matches the simulation - I will get back to you in a few days. 

    You are correct.
    First is the "Specified linear input full-scale voltage" this range (-0.1 to 2V) is guaranteed to produce a linear output. Next, "Analog Input: Absolute Input Voltage" is referring to the conditions that we recommend operating the device under, whereas the "Absolute Maximum Ratings: Input voltage" specify the conditions that the device will potentially be damaged and fail.

    The accuracy spec differences are related to drift, gain error, and isolation ratings - I do not believe these are simulated in TINA, therefor the AMC1311 model can be used for general simulation of any of the AMC1311 products.

  • 0 in reply to Alexander Smith
    TI__Expert 3040 points

    Thank you Alex. Understood.

    I look forward to receiving your reply: how much simulation model can consider input voltage and whether I can trust the simulation result under -0.1V input.

  • 0 in reply to Oliver Kim7
    TI__Mastermind 49231 points

    Hi Oliver,

    The AMC1311 begins to clip beyond around -500mV. There is an error with the simulation model. Thank you for bringing this to our attention, we'll get it fixed as soon as possible.

    Ch1 is the input signal (2Vpp, sine)

    Ch2 is VOUTP

    Ch3 is VOUTN