Datasheet

...........continued
Symbol Parameter Conditions Min. Typ. Max. Units
R
SAMPLE
Input channel source
resistance
(2)
- - 3.5 kΩ
I
DD
DC supply current
(1)
f
CLK_ADC
=
2.1MHz
(3)
- 1.25 1.83 mA
1. These values are based on characterization. These values are not covered by test limits in
production.
2. These values are based on simulation. These values are not covered by test limits in production or
characterization.
3. In this condition and for a sample rate of 350ksps, a conversion takes 6 clock cycles of the ADC
clock (conditions: 1X gain, 12-bit resolution, differential mode, free-running).
Table 38-11. Differential Mode
Symbol Parameter Conditions Min. Typ. Max. Units
ENOB Effective Number Of Bits With gain compensation - 10.5 10.8 bits
TUE Total Unadjusted Error 1x Gainn 1.5 2.7 13 LSB
INLI Integral Non Linearity 1x Gainn 0.9 1.3 4 LSB
DNL Differential Non Linearity 1x Gainn +/-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 +20.0 mV
Gain Accuracy
(5)
Ext. Ref. 0.5x +/-0.02 +/-0.05 +/-0.2 %
Ext. Ref. 2x to 16x +/-0.01 +/-0.03 +/-0.5 %
Offset Error Ext. Ref. 1x -8.0 -1.0 +8.0 mV
V
REF
=V
DDANA
/1.48 -8.0 -0.60 +8.0 mV
Bandgap -6.0 -1.0 +6.0 mV
SFDR Spurious Free Dynamic Range 1x Gain
F
CLK_ADC
= 2.1MHz
F
IN
= 40kHz
A
IN
= 95%FSR
65.0 71.5 76.0 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 -75.0 -71.0 -67.0 dB
Noise RMS T=25°C 0.6 1.0 1.6 mV
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):
SAM D21 Family
Electrical Characteristics at 105°C
© 2018 Microchip Technology Inc.
Datasheet Complete
DS40001882D-page 1051