Datasheet

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1051

3.1. If |VIN| > VREF/4

• VCM_IN < 0.95*VDDANA + VREF/4 – 0.75V

• VCM_IN > VREF/4 -0.05*VDDANA -0.1V

3.2. If |VIN| < VREF/4

• VCM_IN < 1.2*VDDANA - 0.75V

• VCM_IN > 0.2*VDDANA - 0.1V

4. The ADC channels on pins PA08, PA09, PA10, PA11 are powered from the VDDIO power supply.

The ADC performance of these pins will not be the same as all the other ADC channels on pins

powered from the VDDANA power supply.

5. The gain accuracy represents the gain error expressed in percent. Gain accuracy (%) = (Gain Error

in V x 100) / (2*Vref/GAIN)

Table 38-12. Single-Ended Mode

Symbol Parameter Conditions Min. Typ. Max. Units

ENOB Effective Number of Bits With gain compensation - 9.7 10.1 Bits

TUE Total Unadjusted Error 1x gain - 7.9 30.0 LSB

INL Integral Non-Linearity 1x gain 1.4 2.6 5.0 LSB

DNL Differential Non-Linearity 1x gain +/-0.6 +/-0.7 +/-0.95 LSB

Gain Error Ext. Ref. 1x -5.0 0.6 5.0 mV

Gain Accuracy

(4)

Ext. Ref. 0.5x +/-0.1 +/-0.37 +/-0.5 %

Ext. Ref. 2x to 16X +/-0.01 +/-0.1 +/-0.2 %

Offset Error Ext. Ref. 1x -5.0 0.6 10.0 mV

SFDR Spurious Free Dynamic Range 1x Gain

CLK_ADC

= 2.1MHz

= 40kHz

= 95%FSR

63.0 68.0 70.1 dB

SINAD Signal-to-Noise and Distortion 55.0 60.1 62.5 dB

SNR Signal-to-Noise Ratio 54.0 61.0 64.0 dB

THD Total Harmonic Distortion -70.0 -68.0 -65.0 dB

Noise RMS T = 25°C - 1.0 - mV

1. Maximum numbers are based on characterization and not tested in production, and for 5% to 95%

of the input voltage range.

2. Respect the input common mode voltage through the following equations (where VCM_IN is the

Input channel common mode voltage) for all VIN:

– VCM_IN < 0.7*VDDANA + VREF/4 – 0.75V

– VCM_IN > VREF/4 – 0.3*VDDANA - 0.1V

3. The ADC channels on pins PA08, PA09, PA10, PA11 are powered from the VDDIO power supply.

The ADC performance of these pins will not be the same as all the other ADC channels on pins

powered from the VDDANA power supply.

4. The gain accuracy represents the gain error expressed in percent. Gain accuracy (%) = (Gain Error

in V x 100) / (Vref/GAIN)

SAM D21 Family

Electrical Characteristics at 105°C

Datasheet Complete

DS40001882D-page 1052