Differential non-linearity (DNL) is defined as the maximum and minimum difference in the step width between actual transfer function and the perfect transfer function. Non-linearity produces quantization steps with varying widths, some narrower and some wider. For the case of ideal ADC, the step ...
This value will usually be in the range of 40% to 65% of the value calculated with the above formula. An accurate calculation is not possible because of the board material and layout dependence. The above is intended for oversampling or Nyquist applications. There should be no resistor or ...
59、and THD as given below.1.15 ENOBEffective number of bits (ENOB) is the number of bits with which the ADC behaves like a perfect ADC.It is another way of representing the signal to noise ratio and distortion (SINAD) and is derived from the formula specified in Section 2.11 as given ...
4095 LSB voltage level (worst case) Qcharging = Qdischarging 46/53 Csh ⋅ Umax = U--R---l-is--n-b- ⋅ ∫tC e-R---i-n---Ct---e--x---tdt 0 Simplification of the above formula gives the final formula for the required waiting time between conversions: tC = –(Rin...
Rin can be calculated using the formula: Rin = 2 × 1 fclk × C Figure 10. Equivalent input circuit for input channel SDADCx_AINxP RAIN VAIN SDADCx_AINxM chclk chclkz chclkz chclk C = 0.543 pF + 0.152 pF * gain C = 0.543 pF + 0.152 pF * gain RAIN: impedance of the analog...
3. Sigma-delta ADC Sigma-delta ADC 采用 1 位 DAC、滤波和附加采样来实现非常精确的转换,转换精度取决于 参考输入和输入时钟频率。 Sigma -delta 转换器的主要优势在于其较高的分辨率。 文案大全 实用标准文档 闪速和逐次逼近 ADC采用并联电阻或串联电阻,这些方法的问题在于电阻的精确度将直接 影响转换结果的精确...
DIFFERENTIAL NON-LINEARITY (DNL) is the measure of the maximum deviation from the ideal step size of 1 LSB. DUTY CYCLE is the ratio of the time that a repetitive digital waveform is high to the total time of one period. The specification here refers to the SCLK. EFFECTIVE NUMBER OF BITS...
droop shown in (3). And the effective MSB bit weight is not dependent on Vin, unlike wn-1’ in (4). To generalize from the derivation above, let’s now assume each bit capacitor has its corresponding reservoir capacitor in the SAR DAC, we will arrive at the following general formula...
DIFFERENTIAL NON-LINEARITY (DNL) is the measure of the maximum deviation from the ideal step size of 1 LSB. DUTY CYCLE is the ratio of the time that a repetitive digital waveform is high to the total time of one period. The specification here refers to the SCLK. EFFECTIVE NUMBER OF BITS...
DIFFERENTIAL NON-LINEARITY (DNL) is the measure of the maximum deviation from the ideal step size of 1 LSB. Measured at 200 Msps with a ramp input. EFFECTIVE NUMBER OF BITS (ENOB, or EFFECTIVE BITS) is another method of specifying Signal-to-Noise and Distortion Ratio, or SINAD. ENOB is...