Atmel Xplained Pro Evaluation Kit ATSAM4E-XPRO ATSAM4E-XPRO Data Sheet
Product codes
ATSAM4E-XPRO
SAM4E [DATASHEET]
Atmel-11157D-ATARM-SAM4E16-SAM4E8-Datasheet_12-Jun-14
1352
Figure 45-7.
Analog Full Scale Ranges in Single Ended/Differential Applications Versus Gain
45.6.11 AFEC Timings
Each AFEC has its own minimal startup time that is programmed through the field STARTUP in the AFEC_MR.
A minimal tracking time is necessary for the AFEC to guarantee the best converted final value between two
channel selections. This time has to be programmed through the TRACKTIM bit field in the AFEC_MR.
channel selections. This time has to be programmed through the TRACKTIM bit field in the AFEC_MR.
When the gain, offset or differential input parameters of the analog cell change between two channels, the analog
cell may need a specific settling time before starting the tracking phase. In that case, the controller automatically
waits during the settling time defined in the AFEC_MR. Obviously, if the ANACH option is not set, this time is
unused.
cell may need a specific settling time before starting the tracking phase. In that case, the controller automatically
waits during the settling time defined in the AFEC_MR. Obviously, if the ANACH option is not set, this time is
unused.
V
IN+
gain=0.5
gain=1
gain=2
gain=4
single ended
se0fd1 = 0
fully differential
se0fd1 = 1
same as
gain=1
same as
gain=2
0
V
ADVREF
(½)V
ADVREF
0
(¾)V
ADVREF
(¼)V
ADVREF
(½)V
ADVREF
V
ADVREF
0
(
5
/
8
)V
ADVREF
(
3
/
8
)V
ADVREF
(½)V
ADVREF
(¼)V
ADVREF
V
ADVREF
0
(
5
/
8
)V
ADVREF
(
3
/
8
)V
ADVREF
(½)V
ADVREF
(¼)V
ADVREF
(¾)V
ADVREF
(
1
/
8
)V
ADVREF
(00)
(01)
(10)
(11)
V
IN+
V
IN+
V
IN+
V
IN-
V
IN+
V
IN-
V
IN+
V
IN-
V
IN+
V
IN-
V
IN+
V
ADVREF