Datasheet

1447
SAM4E [DATASHEET]
Atmel-11157D-ATARM-SAM4E16-SAM4E8-Datasheet_12-Jun-14
47.7.6 ADC Resolution with Averaging
47.7.6.1 Conditions @ 25°C with Gain =1
 f
ADC
= 20 MHz; f
ADC
= 2 MHz for INL and DNL static measurement only
 f
S
= 1 MHz, ADC Sampling Frequency in Free Run Mode
 V
ADVREF
= 3V
 Signal Amplitude: V
ADVREF
/2, Signal Frequency < 100 Hz
 OSR: Number of Averaged Samples
 V
VDDIN
= 2.4V
Table 47-46. ADC Resolution following Digital Averaging (Gain=1)
Parameter Averaging
Resolution
RES (AFEC_EMR)
Over
Sampling
Ratio
Mode
(bits)
INL
(LSB)
DNL
(LSB)
SNR
(dB)
THD
(dB)
ENOB
(bits)
FS
(ksps)
Single Ended Mode
RES = 0 1 12 +/-1 +/-0.5 63.5 -83 10.2 1000
RES = 2 4 13 +/-1 +/-1 68.3 -84.5 11 250
RES = 3 16 14 +4 / -2 +3.2 / -1 73 -85.7 11.8 62.5
RES = 4 64 15 +6 / -3.5 — 76.8 -85.8 12.4 15.6
RES = 5 256 16 +15 / -8 — 82.7 -86.2 13.2 3.9
Differential Mode
RES = 0 1 12 +/-1 +/-0.5 64 -83 10.3 1000
RES = 2 4 13 +/-1 +/-1 69.2 -83.7 11.2 250
RES = 3 16 14 +3 / -1.5 +3 / -1 74.8 -84.5 12.1 62.5
RES = 4 64 15 +6 / -3.5 — 80.2 -84.5 12.8 15.6
RES = 5 256 16 +10 / -7 — 83.9 -84.9 13.2 3.9