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INA1650: INA1650IPWR

Part Number: INA1650

Hello Slight smile

I have one question about gain. In datasheet there is only information about it "gain =1". But how should I understand this information? XLR has standard 4V RMS (between "+" and "-"). If we have 4V RMS on XLR, then with gain =1 on output (RCA,SE) we have 2V or 4V RMS? 

2V - half of XLR (level between + or - and GND)
4V - level between "+" and "-" of XLR

I think that I will get 4V RMS on output, but Im not 100% sure. If yes, its too high for RCA/SE standard (2V RMS)

Thanks in advance for your help

Have a nice day


Regards
Mateusz

  • Hi Mateusz,

    The INA1650 has a fixed gain of 1V/V.

    The device is configured as a differential input to single-ended output instrumentation amplifier.

    This means that for a differential input voltage of 4V RMS, the INA1650 will produce a single-ended output of 4V RMS centered around the DC reference voltage (pin 12 / pin 9).

    See in the simulation below, a differential input voltage of 4V RMS is applied to both channels, and 4V RMS is present at both outputs, each with a DC offset depending on the DC voltage applied at each channel's reference pin. I set 0V at the REFA pin and 6V at the REFB pin. The peak-to-peak voltage at both outputs are the same, and equivalent to 4V RMS.

    INA1650_4V_RMS.TSC

    Regards,

    Zach