SLAAE47A May   2022  – August 2022 DAC11001A , DAC11001B

 

  1.   Abstract
  2.   Trademarks
  3. 1Introduction
  4. 2DAC Error Sources
    1. 2.1 Offset Error
    2. 2.2 Gain Error
    3. 2.3 Integral Non Linearity (INL)
    4. 2.4 Noise Sources
  5. 3Error Sources from Reference
    1. 3.1 Initial Accuracy
    2. 3.2 Temperature Drift
    3. 3.3 Load Regulation Error
    4. 3.4 Line Regulation Error
    5. 3.5 0.1 - 10 Hz Peak-to-Peak Noise
    6. 3.6 Example Using REF7025
  6. 4Error Sources from Inverting and Non-Inverting Gain Stage
    1. 4.1 Input Offset Voltage Error
    2. 4.2 Input Offset Voltage Drift Error
    3. 4.3 Power Supply Rejection Ratio (PSRR) Error
    4. 4.4 Open Loop Gain Error
    5. 4.5 Resistor Tolerance Error
  7. 5Example Calculation using DAC11001A
  8. 6Error Summary
  9. 7References
  10. 8Revision History

4.4 Open Loop Gain Error

This error describes the deviation of gain from the set value due to the finite nature of the open loop gain of the operational amplifier. This error can be minimized by selecting a high open loop gain amplifier.

Equation 13. O p e n   L o o p   G a i n   E r r o r p p m =   G a i n   ×   1 1 + 10 A O L d B 20 × R g R g + R f
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