Atmel ARM-Based Evaluation Kit for SAM4S16C, 32-Bit ARM® Cortex® Microcontroller ATSAM4S-WPIR-RD ATSAM4S-WPIR-RD Data Sheet
Product codes
ATSAM4S-WPIR-RD
SAM4S Series [DATASHEET]
Atmel-11100G-ATARM-SAM4S-Datasheet_27-May-14
1158
Single-ended Mode
illustrates the ADC output code relative to an input voltage V
IN
between 0V (Ground) and V
ADVREF
.
The ADC is configured in Single-ended mode by connecting internally the negative differential input to V
ADVREF
/2.
As the ADC continues to work internally in Differential mode, the offset is measured at V
ADVREF
/2.
Figure 44-15. Gain and Offset Errors in Single-ended Mode
where:
FSe=(FSe+)-(FSe-) is for full-scale error, unit is LSB code
Offset error E
O
is the offset error measured for V
IN
=0V
Gain error E
G
=100xFSe/4096, unit in %
The error values in
include the sample and hold error as well as the PGA gain error.
Vin Single Ended
4095
ADVREF/2
ADVREF
0
0
ADC codes
FSe-
Eo=Offset error
2047
FSe+
Table 44-46.
Single-ended Gain Error
Offset Mode
OFFx=0
OFFx=0
OFFx=1
OFFx=0
OFFx=1
Gain Mode
1
2
2
4
4
AutoCorrection
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
Average Gain Error (%)
0.449
0.078
0.771
-0.010
0.781
0.117
1.069
-0.029
1.064
0.151
Standard Deviation (%)
0.420
0.200
0.430
0.313
0.425
0.327
0.420
0.415
0.415
0.371
Min Value (%)
-0.811
-0.522
-0.518
-0.947
-0.493
-0.864
-0.190
-1.274
-0.181
-0.962
Max Value (%)
1.709
0.679
2.061
0.928
2.056
1.099
2.329
1.216
2.310
1.265
Table 44-47.
Single-ended Output Offset Error
Offset Mode
OFFx=0
OFFx=0
OFFx=1
OFFx=0
OFFx=1
Gain
1
2
2
4
4
Average Offset Error
(LSB)
(LSB)
-5.7
-7.7
-10.3
-7.3
-18.7