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

3.4 Line Regulation Error

Line regulation applies only to series voltage references and is the measure of the change in the reference voltage as a function of the input voltage. The importance significance of line regulation error depends on the tolerance of the input supply. In situations where the input voltage tolerance is within 10% or less, it may not significantly contribute to the total error. The extension of line regulation over frequency is the Power Supply Rejection Ratio (PSRR). PSRR is rarely specified, but typical curves are usually provided in the data sheet. As with line regulation, the importance significance of PSRR depends on specifics the characteristics of the input supply. If VIN is noisy (generated with a switching regulator, sensitive to EMI, or subject to large load transients), PSRR may be critical.