Description
Calculate idealCode = maximumCode × inputVoltage / referenceVoltage and referenceDerivative = -idealCode / referenceVoltage.
Ideal ADC and DAC models connect digital codes to a reference span and quantization step. Coding, endpoint conventions, and reference behavior determine the meaning of a code-domain term.
Calculate idealCode = maximumCode × inputVoltage / referenceVoltage and referenceDerivative = -idealCode / referenceVoltage.
When to use this tool
Use ADC Reference Drift Code Sensitivity when you need one explicit converter coding, resolution, or analog-model term.
How to use the tool and how it works
- Enter inputVoltage, referenceVoltage, maximumCode. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read idealCode, referenceDerivative. Use the output convention below.
Calculate idealCode = maximumCode × inputVoltage / referenceVoltage and referenceDerivative = -idealCode / referenceVoltage. Require input voltage within the positive reference.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| inputVoltage | Input Voltage | Required. Finite number; minimum 0. |
| referenceVoltage | Positive converter reference voltage in volts. | Required. Finite number; strictly above 0. |
| maximumCode | Maximum Code | Required. Safe integer; minimum 1. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| idealCode | Ideal Code | Required. Finite number. |
| referenceDerivative | Reference Derivative | Required. Finite number. |
{
"input": {
"inputVoltage": 1,
"referenceVoltage": 2,
"maximumCode": 1023
},
"output": {
"idealCode": 511.5,
"referenceDerivative": -255.75
}
}Limitations and assumptions
- The derivative is code units per volt when volts are used; no quantization, clipping beyond the domain, or converter nonlinearity is modeled.
- Inputs must satisfy both the field types and the cross-field conditions above. Invalid input causes an error; a successful false flag or documented placeholder is a different result.
- Numeric calculations use binary floating point unless exact decimal-integer arithmetic is explicitly stated. No hidden measurement tolerance or decimal rounding is added; nonfinite or out-of-contract results are rejected. Numeric signed-zero results are exported as zero.
Alternative or Complementary methods
Compare the ideal term with device transfer curves, noise, calibration, and acquisition requirements.
References
Similar or alternative tools
- ADC Reference Lsb Ratio
Return (firstReference / secondReference) × 2^(secondBits - firstBits) as lsbRatio.
- Microcontroller: ADC Code Bin Midpoint
Use referenceVoltage / 2^bits for unipolar bin width or twice that value for twos-complement-bipolar.