48.6.2 Analog-to-Digital Converter (ADC) Characteristics
Symbol | Parameters | Conditions | Measurements | Unit | |||
---|---|---|---|---|---|---|---|
Min. | Typ. | Max. | |||||
ENOB | Effective Number of bits | Fadc = 1Msps | Vref=2.0V Vddana=3.0V | 9.1 | 10.2 | 10.8 | bits |
Vref=1.0V Vddana=1.8V to 3.6V | 9.0 | 10.1 | 10.6 | ||||
Vref=Vddana=1.8V to 3.6V | 8.9 | 9.9 | 11.0 | ||||
Bandgap Reference, Vddana=1.8V to 3.6V | 9.0 | 9.8 | 10.6 | ||||
TUE | Total Unadjusted Error | without offset and gain compensation | Vref=Vddana=1.8V to 3.6V | - | 7 | 38 | LSB |
INL | Integral Non Linearity | without offset and gain compensation | Vref=Vddana=1.8V to 3.6V | - | +/-1.9 | +/-4.8 | |
DNL | Differential Non Linearity | without offset and gain compensation | Vref=Vddana=1.8V to 3.6V | - | +0.94/-1 | +1.85/-1 | |
Gain | Gain Error | without gain compensation | Vref=1V Vddana=1.8V to 3.6V | - | +/-0.38 | +/-2.2 | % |
Vref=3V Vddana=1.8V to 3.6V | - | +/-0.14 | +/-1 | ||||
Bandgap Reference | - | +/-0.64 | +/-6.6 | ||||
Vref=Vddana=1.8V to 3.6V | - | +/-0.15 | +/-1 | ||||
Offset | Offset Error | without offset compensation | Vref=1V Vddana=1.8V to 3.6V | - | +/-0.13 | +/-19.5 | mV |
Vref=3V Vddana=1.8V to 3.6V | - | +/-1.82 | +/-18.3 | ||||
Bandgap Reference | - | +/-2.07 | +/-19.4 | ||||
Vref=Vddana=1.8V to 3.6V | - | +/-1.82 | +/-18.6 | ||||
SFDR | Spurious Free Dynamic Range | Fs = 1MHz / Fin = 13 kHz / Full range Input signal | Vref=2.0V Vddana=3.0V | 58.1 | 70.5 | 77.5 | dB |
SINAD | Signal-to-Noise and Distortion ratio | 56.7 | 63.4 | 66.5 | |||
SNR | Signal-to-Noise ratio | 56.5 | 64.4 | 67.1 | |||
THD | Total Harmonic Distortion | -74.7 | -68.7 | -57.7 | |||
Noise RMS | External Reference voltage | External Reference voltage | - | 0.42 | - | mV |
Note:
- These values are given without any ADC oversampling and decimation features enabled.
- These values are based on characterization, and are not covered in test limits in production.
Symbol | Parameters | Conditions | Measurements | Unit | |||
---|---|---|---|---|---|---|---|
Min. | Typ. | Max. | |||||
ENOB | Effective Number of bits | Fadc = 1Msps | Vref=2.0V Vddana=3.0V | 8.0 | 9.3 | 9.7 | bits |
Vref=1.0V Vddana=1.8V to 3.6V | 7.9 | 8.2 | 9.4 | ||||
Vref=Vddana=1.8V to 3.6V | 8.6 | 9.2 | 9.9 | ||||
Bandgap Reference, Vddana=1.8V to 3.6V | 7.8 | 8.4 | 8.9 | ||||
TUE | Total Unadjusted Error | without offset and gain compensation | Vref=2.0V Vddana=3.0V | - | 12 | 77 | LSB |
INL | Integral Non Linearity | without offset and gain compensation | Vref=2.0V Vddana=3.0V | - | +/-3.4 | +/-9.1 | |
DNL | Differential Non Linearity | without offset and gain compensation | Vref=2.0V Vddana=3.0V | - | +0.9/-1 | +1.8/-1 | |
Gain | Gain Error | without gain compensation | Vref=1V Vddana=1.8V to 3.6V | - | +/-0.3 | +/-6.3 | % |
Vref=3V Vddana=1.8V to 3.6V | - | +/-0.3 | +/-6.3 | ||||
Bandgap Reference | - | +/-0.4 | +/-6.3 | ||||
Vref=Vddana=1.8V to 3.6V | - | +/-0.2 | +/-0.9 | ||||
Offset | Offset Error | without offset compensation | Vref=1V Vddana=1.8V to 3.6V | - | +/-2.6 | +/-58 | mV |
Vref=3V Vddana=1.8V to 3.6V | - | +/-2.6 | +/-58 | ||||
Bandgap Reference | - | +/-1.3 | +/-42.4 | ||||
Vref=Vddana=1.8V to 3.6V | - | +/-1.8 | +/-46.6 | ||||
SFDR | Spurious Free Dynamic Range | Fs = 1 MHz / Fin = 13 kHz / Full range Input signal | Vref=2.0V Vddana=3.0V | 56.1 | 63.8 | 72.6 | dB |
SINAD | Signal-to-Noise and Distortion ratio | 50.0 | 57.7 | 60.1 | |||
SNR | Signal-to-Noise ratio | 51.9 | 58.3 | 59.8 | |||
THD | Total Harmonic Distortion | -72.5 | -62.4 | -52.3 | |||
Noise RMS | External Reference voltage | External Reference voltage | - | 0.80 | - | mV |
Note:
- These values are given without any ADC oversampling and decimation features enabled.
- These values are based on characterization, and are not covered in the test limits in production.
The minimum sampling time tsamplehold for a given
Rsource can be calculated using the following formula:
For 12-bit accuracy: