Datasheet

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Symbol Parameter Conditions Min. Typ. Max. Units
INLI Integral Non Linearity 1x gain 0.9 1.3 4.0 LSB
DNL Differential Non Linearity 1x gain +/-0.3 +/-0.5 +/-0.95 LSB
Gain Error Ext. Ref 1x -10.0 1.3 +10.0 mV
V
REF
=V
DDANA
/1.48 -20.0 -10.0 +10.0 mV
Bandgap -20.0 -2.0 +20.0 mV
Gain Accuracy
(5)
Ext. Ref. 0.5x +/-0.02 +/-0.05 +/-0.1 %
Ext. Ref. 2x to 16x +/-0.01 +/-0.03 +/-0.5 %
Offset Error Ext. Ref. 1x -5.0 -1.0 +5.0 mV
V
REF
=V
DDANA
/1.48 -5.0 -0.60 +5.0 mV
Bandgap -5.0 -1.0 +5.0 mV
SFDR Spurious Free Dynamic Range 1x gain
F
CLK_ADC
= 2.1MHz
F
IN
= 40kHz
A
IN
= 95%FSR
65 71.3 77.0 dB
SINAD Signal-to-Noise and Distortion 58 65 67 dB
SNR Signal-to-Noise Ratio 60 66 68.6 dB
THD Total Harmonic Distortion -75.0 -71.0 -67.0 dB
Noise RMS T=25°C 0.6 1.0 1.6 mV
Note:
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.
3. Respect the input common mode voltage through the following equations (where VCM_IN is the
Input channel common mode voltage):
– 1.1. If |VIN| > VREF/4
– VCM_IN < 0.95*VDDANA + VREF/4 – 0.75V
– VCM_IN > VREF/4 -0.05*VDDANA -0.1V
1.2. 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 37-27. 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
SAM D21 Family
Electrical Characteristics
© 2018 Microchip Technology Inc.
Datasheet Complete
DS40001882D-page 1003