SAM3X8E Atmel Corporation, SAM3X8E Datasheet - Page 1413

• Manufacturer Part Number: SAM3X8E
• Manufacturer: Atmel Corporation

Table 45-28. Channel Conversion Time and ADC Clock
Table 45-29. External Voltage Reference Input
45.7.0.1
11057A–ATARM–17-Feb-12
Symbol
t
t
t
Parameter
ADVREF Input Voltage Range, 12-bit
ADVREF Input Voltage Range, 10-bit
ADVREF Current
ADVREF Input DC impedance
TRACKTIM
CONV
SETTLE
Static performance characteristics
Parameter
Track and Hold Time
Conversion Time
Settling Time
Minimal code=0
Maximal code=4095
ADC resolution = 12 bits (4096)
In the following tables, the LSB is relative to analog scale:
• Single Ended (ex: ADVREF=3.0V),
• Differential (ex: ADVREF=3.0V),
– Gain = 1, LSB = (3.0V / 4096) = 732uV
– Gain = 2, LSB = (1.5V / 4096) = 366uV
– Gain = 4, LSB = (750mV / 4096) = 183uV
– Gain = 0.5, LSB = (6.0V / 4096) = 1465uV
– Gain = 1, LSB = (3.0V / 4096) = 732uV
– Gain = 2, LSB = (750mV / 4096) = 366uV
Conditions
2.4V < V
2.0V < V
Conditions
See
versus Source Output Impedance”
more details
Settling time to change offset and gain
VDDIN
VDDIN
Section “Track and Hold Time
< 3.6V
< 3.6V
for
Min
2.4
2.0
Min
160
200
Typ
14
-
-
Typ
20
VDDIN
VDDIN
Max
250
SAM3X/A
Max
T
Units
CP_ADC
Units
ns
ns
μA
k
V
V
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