17 Facts About Wilkinson ADC

Performance of an Wilkinson ADC is primarily characterized by its bandwidth and signal-to-noise ratio .

The SNR of an Wilkinson ADC is influenced by many factors, including the resolution, linearity and accuracy, aliasing and jitter.

The SNR of an Wilkinson ADC is often summarized in terms of its effective number of bits, the number of bits of each measure it returns that are on average not noise.

The voltage resolution of an Wilkinson ADC is equal to its overall voltage measurement range divided by the number of intervals:.

Consequently, if part of the Wilkinson ADC's bandwidth is not used, as is the case with oversampling, some of the quantization error will occur out-of-band, effectively improving the SQNR for the bandwidth in use.

Rather than the signal simply getting cut off altogether at low levels, it extends the effective range of signals that the Wilkinson ADC can convert, at the expense of a slight increase in noise.

Quantization distortion in an audio signal of very low level with respect to the bit depth of the Wilkinson ADC is correlated with the signal and sounds distorted and unpleasant.

Since a practical Wilkinson ADC cannot make an instantaneous conversion, the input value must necessarily be held constant during the time that the converter performs a conversion .

Many Wilkinson ADC integrated circuits include the sample and hold subsystem internally.

The Wilkinson ADC is limited by the clock rate which is processable by current digital circuits.

Direct-conversion or flash Wilkinson ADC has a bank of comparators sampling the input signal in parallel, each firing for a specific voltage range.

Successive-approximation Wilkinson ADC uses a comparator and a binary search to successively narrow a range that contains the input voltage.

Ramp-compare Wilkinson ADC produces a saw-tooth signal that ramps up or down then quickly returns to zero.

The Wilkinson ADC is based on the comparison of an input voltage with that produced by a charging capacitor.

An integrating Wilkinson ADC applies the unknown input voltage to the input of an integrator and allows the voltage to ramp for a fixed time period .

Delta-encoded or counter-ramp Wilkinson ADC has an up-down counter that feeds a digital to analog converter .

Typically the digital output of an Wilkinson ADC will be a two's complement binary number that is proportional to the input.