2021年3月5日 · An ENOB of 6.8 basically tells you that for example an 8-bit ADC has real world performance that is better than an ideal 6-bit ADC but worse than an ideal 7-bit ADC. You can also think of it as not having 2^6=64 or 2^7=128 discrete steps in the signal like on ideal 6 or 7 bit ADC, but 2^6.8 or about 111 discrete steps.

The limiting factor on the ENOB value is always going to be actual bit depth of the ADC itself. This is a very digital perspective on things. His understanding is that ENOB calculations are based on analog measurements, and there is no limit to the maximum ENOB - it is entirely dependent on the noise characteristics of the ADC.

2022年11月21日 · I want to connect a 4-wire PT100 sensor to a MAX31865 RTD-to-digital converter. The MAX31865 has a resolution of 15 bit, however I need a resolution of 17 bit. Will I be able to use the oversamplin...

2022年12月20日 · ENOB is a property of an ADC; it is the number of bits that an ideal ADC would have to match the SNR of your real ADC (which has more than just quantization noise). Your spice models does not include an ADC, so no you cannot model the …

2019年12月26日 · ENOB, or Effective Number of Bits, is generally used to get a measure of how imperfect a signal converter is, so generally uses SINAD rather than plain SNR. However, these are approximate figures, and there's little point getting picky about them if the actual performance of a converter matters to you.

We know that ADC 1LSB=Vref/(2^N) where N is the resolution of the ADC. We know that ADC Effective number of bits (ENOB) is always less than the resolution "N". When calculating 1LSB do I need to ...

However, running the usual test procedures (i.e. sine wave for ENOB and sawtooth for DNL and INL), I find that the results are rather poor. Long story short, the ADC "is" 12 bits - meaning one would expect around 10 bits of resolution out of it. However, no matter what I try, ENOB seems to plateau around 8.5 bits.

The general meaning would be for a hypothetical signal with an amplitude equating the rails voltage. This works for any Nyquist rate ADC but for a sigma-delta ADC that would mean that SNDR and ENOB are actually not measurable since the circuit would become unstable (or marginally stable). Anyone can give me his opinion? Maybe with a reference ...

14-bit is marketing speak, and the hardware also gives you that, so they'll say you have nothing to complain about. Just above ENOB in the datasheet it gives SINAD (Signal to Noise and Distortion) numbers. That's 72 dB, and 1 bit corresponds to a 6 dB level, so that 72 dB is indeed 12 bits. The 2 lowest bits are noise.

2020年4月21日 · When calculating an ADC or DAC ENOB, do you use SNDR or SINAD, SFDR, SNR or SDR or something else ? I have see all used in calculating the ENOB, so which one is correct ?