Data Sheet

1079
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 valid for 5% to 95% of the input
voltage range.
2. Dynamic parameter numbers are based on characterization and not tested in production.
Gain Accuracy
(5)
Ext. Ref. 0.5x +/-0.1 +/-0.2 +/-0.45 %
Ext. Ref. 2x to 16x +/-0.1 +/-0.2 +/-2.0 %
Offset Error
Ext. Ref. 1x -10.0 -1.5 +10.0 mV
V
REF
=V
DDANA
/1.48 -10.0 0.5 +15.0 mV
Bandgap -10.0 3.0 +15.0 mV
SFDR Spurious Free Dynamic Range
1x Gain
F
CLK_ADC
= 2.1MHz
F
IN
= 40kHz
A
IN
= 95%FSR
64.2 70.0 78.9 dB
SINAD Signal-to-Noise and Distortion 61.4 65.0 66 dB
SNR Signal-to-Noise Ratio 64.3 65.5 66.0 dB
THD Total Harmonic Distortion -74.8 -64.0 -65.0 dB
Noise RMS T=25 C 0.6 1.0 1.6 mV
Table A-17. Differential Mode (Device Variant B)
Symbol Parameter Conditions Min. Typ. Max. Units
ENOB Effective Number Of Bits With gain compensation - 10.5 10.8 bits
TUE Total Unadjusted Error
I 1x Gain n
1.5 2.7 14 LSB
INL I Integral Non Linearity 1x Gainn 0.9 1.3 4 LSB
DNL Differential Non Linearity 1x Gainn +/-0.3 +/-0.5 +/-0.95 LSB
I
I
I
Gain Error
Ext. Ref 1x -10.0 -1.3 +10.0 mV
V
REF
=V
DDANA
/1.48 -25.0 -10.0 +10.0 mV
Bandgap -25.0 +2 +10.0 mV
Gain Accuracy
(5)
Ext. Ref. 0.5x
+/-
0.005
+/-0.05 +/-0.15 %
Ext. Ref. 2x to 16x +/-0.1 +/-0.03 +/-0.5 %
Offset Error
Ext. Ref. 1x -8.0 -1.0 +8.0 mV
V
REF=VDDANA/1.48
-8.0 0.6 +8.0 mV
Bandgap -6.0 -1.0 +8.0 mV
SFDR Spurious Free Dynamic Range
1x Gain
F
CLK_ADC
= 2.1MHz
F
IN
= 40kHz
A
IN
= 95%FSR
65.0 71.5 73.5 dB
SINAD Signal-to-Noise and Distortion 58.0 65.0 67.0 dB
SNR Signal-to-Noise Ratio 60.0 66.0 68.6 dB
THD Total Harmonic Distortion -73.0 -71.0 -67.0 dB
Noise RMS T=25 C 0.6 1.0 1.6 mV
Table A-16. Differential Mode (Device Variant A) (Continued)
Symbol Parameter Conditions Min. Typ. Max. Units