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OPA2323: Variance of GBW

Shunsuke Yamamoto
Genius 10411 points

Part Number: OPA2323

Hi team,

The varaince of GBW is not listed on the datasheet of OPA2323. How much margin of GBW should my customer consider?

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Best regards,

Shunsuke Yamamoto

  • +1
    TI__Guru 73801 points

    Since GBW=gm/(2*Pi*Cc), where in CMOS gm ~ sq-rt(Iq) and Iq~1/R, the maximum variation in GBW is related to +/-15% maximum process variation of sheet resistance and sheet capacitance. Therefore, in the case of OPA2323, GBW may be calculated to be anywhere between: 20MHz*[sq-rt(0.85)/1.15] < GBW < 20MHz*[sq-rt(1.15)/0.85]

    16MHz < GBW < 25MHz