Data Sheet

958
Atmel | SMART SAM D21 [DATASHEET]
Atmel-42181G–SAM-D21_Datasheet–09/2015
Notes: 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 com-
mon mode voltage) for all VIN:
z VCM_IN < 0.7*VDDANA + VREF/4 – 0.75V
Table 36-24. Single-Ended Mode, Device Variant A
Symbol Parameter Conditions Min. Typ. Max. Units
ENOB Effective Number of Bits With gain compensation - 9.5 9.8 Bits
TUE Total Unadjusted Error 1x gain - 10.5 14.0 LSB
INL Integral Non-Linearity 1x gain 1.0 1.6 3.5 LSB
DNL Differential Non-Linearity 1x gain +/-0.5 +/-0.6 +/-0.95 LSB
Gain Error Ext. Ref. 1x -5.0 0.7 +5.0 mV
Gain Accuracy
(4)
Ext. Ref. 0.5x +/-0.2 +/-0.34 +/-0.4 %
Ext. Ref. 2x to 16X +/-0.01 +/-0.1 +/-0.2 %
Offset Error Ext. Ref. 1x -5.0 1.5 +5.0 mV
SFDR Spurious Free Dynamic Range
1x Gain
F
CLK_ADC
= 2.1MHz
F
IN
= 40kHz
A
IN
= 95%FSR
63.1 65.0 67.0 dB
SINAD Signal-to-Noise and Distortion 47.5 59.5 61.0 dB
SNR Signal-to-Noise Ratio 48.0 60.0 64.0 dB
THD Total Harmonic Distortion -65.4 -63.0 -62.1 dB
Noise RMS T = 25°C - 1.0 - mV
Table 36-25. Single-Ended Mode, Device Variant B
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 15.0 LSB
INL Integral Non-Linearity 1x gain 1.4 2.6 4.5 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 +/-0.2 +/-0.37 +/-0.55 %
Ext. Ref. 2x to 16X +/-0.01 +/-0.1 +/-0.2 %
Offset Error Ext. Ref. 1x -5.0 0.6 +5.0 mV
SFDR Spurious Free Dynamic Range
1x Gain
F
CLK_ADC
= 2.1MHz
F
IN
= 40kHz
A
IN
= 95%FSR
63 68.0 71.0 dB
SINAD Signal-to-Noise and Distortion 55 60.1 63.0 dB
SNR Signal-to-Noise Ratio 54.0 61.0 64.0 dB
THD Total Harmonic Distortion -70.8 -68.0 -65 dB
Noise RMS T = 25°C - 1.0 - mV