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
1157
SAM4S Series [DATASHEET]
Atmel-11100G-ATARM-SAM4S-Datasheet_27-May-14
Differential Mode
In differential mode, the offset is defined when the differential input voltage is zero.
Figure 44-14. Gain and Offset Errors in Differential 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.
Table 44-44.
Differential Gain Error E
G
Gain Mode
0.5
1
2
Auto Correction
No
Yes
No
Yes
No
Yes
Average Gain Error (%)
-0.107
0.005
0.444
0.112
0.713
0.005
Standard Deviation (%)
0.410
0.210
0.405
0.229
0.400
0.317
Gain Min Value (%)
-1.338
-0.625
-0.771
-0.576
-0.488
-0.947
Gain Max Value (%)
1.123
0.635
1.660
0.801
1.914
0.957
Table 44-45.
Differential Output
Offset Error E
O
Gain
0.5
1
2
Average Offset Error (LSB)
-1.2
-1.2
-0.6
Standard Deviation (LSB)
0.3
0.4
0.4
Offset Min value (LSB)
-2.1
-2.4
-1.8
Offset Max value (LSB)
-0.3
0
0.6
Vin differential
4095
ADVREF/2
-ADVREF/2
0
0
ADC codes
FSe-
Eo=Offset error
2047
FSe+