Data Converter (resit) - 5ECC0

Resit notes for Electronics II - 5ECC0

• Topics: Data Converters

DAC

Nominal Full Scale (NFS) output: max output
Full Scale (FS) output: output @ input = 11…11
Full Scale Range (FSR): max output swing

Integral Non Linearity (INL): maximum absolute deviation from conversion curve

Differential Non Linearity (DNL): maximum absolute deviation of 1 conversion step @ 1 LSB (derivative of INL)

Non monotonicity:
Drift: changes due to external factors

Spurious-free Dynamic Range (SFDR)

ADC

Same non-idealities as DAC with:

• sample&hold: aliasing, time (aperture) jitter
• conversion: quantization errors

Max quantization error:
Quantization noise power:
Max signal power:
SQNR (Signal-to-Quantization-Noise-Ratio):

Aperture jitter: error in sampling moment →

D: digital code