OFFSET ERROR(失调误差):是输出代码从代码0000h转换到0001h时的差分输入电压与1 LSB之差。 POSITIVE FULL-SCALE ERROR(正满量程误差):输出代码转换为正满量程时的差分输入电压与VREF减去1 LSB之差。 POSITIVE GAIN ERROR(正增益误差):是正满量程误差和失调误差之间的差。 PSRR(POWER SUPPLY REJECTION RATIO)(电源...
1.9 Full Scale Error Full scale error is the deviation of the last transition <full scale transition> of the actual ADC from the last transition of the perfect ADC, measured in LSB or volts. Full scale error is due to both gain and offset errors. In Figure 1-15, the deviation of the...
Error ±0.001 ±0.015 %FSR Channel Offset Matching ±0.001 ±0.015 %FSR Offset Temperature Coefficient ±0.8 µV/°C Gain Error ±0.015 %FSR Positive Full-Scale Error ±0.015 %FSR Negative Full-Scale Error ±0.015 %FSR Positive Full-Scale Error Matching ±0.01 %FSR Negative Full-Scale Error...
Full-scale erroris the difference between the ideal code transition to the highest output code and the actual transition to the output code when the offset error is zero. This is observed as a change in slope of the transfer function line as shown in Figure 5. A similar specification, gain...
对于双极性ADC,还把模拟输入量的正向最大允许值称为正满度值(Positive Full-Scale),通常对应的二进制数全为1;把负向最大(绝对值)允许值称为负满度值(Negative Full-Scale)、通常对应的二进制数全为0。 如: 6.量化误差(Quantizing Error)(以下是理想特性) 由于ADC的有限分辩率,量化误差是模拟输入量在量化取整...
Gain Error Gain error is a figure of merit that indicates how well the slope of the actual transfer function matches the slope of the ideal transfer function. The slope of the actual transfer function is measured between two data points: positive full scale and negative full scale. Ideally, ...
9、 MEASURED ADC y = m2x + b FULL-SCALE ERROR GAIN ERROR UNUSED CODES FOR NEGATIVE GAIN ERROR DIGITAL CODE IDEAL ADC y = (m1)x y = (m2)x -FS NEGATIVE Negative GAIN ERROR Gain Error ANALOG INPUT (V) +FS IDE AL AD C POSITIVE Positive GAIN ERROR Gain Error OFFSET ERROR b ANALOG...
Ideally, the positive full-scale MAX1 209 transition occurs at 1 .5 LSBs below positive full scale, and the negative fullscale transition occurs at 0.5 LSB above negative full scale. The gain error is the difference of the measured transition points minus the difference of the ideal transition...
Positive Full-Scale Error (AD7862-2, 0 V to 2.5 V) This is the deviation of the last code transition (01 . . . 110 to 01 . . . 111) from the ideal VREF – 3/2 LSB after the unipolar offset error has been adjusted out. Bipolar Zero Error (AD7862-10, ؎10 V, AD7862-3, ...
The MFS reference voltage is GND so VREF error has no effect. The gain error is the deviation from the ideal positive full-scale (PFS) output for a PFS input, minus the offset error. The PFS reference voltage is VREF, so any shift in the reference voltage equates to a gain error. ...