Datasheet

134
42023GS–SAM–03/2014
ATSAM4L8/L4/L2
Table 9-46. DC Characteristics
Symbol Parameter Conditions Min Typ Max Units
VDDANA Supply voltage
(1)
1.6 3.6 V
Reference range
(2)
Differential mode 1.0
VDDANA
-0.6
VUnipolar and Window modes 1.0 1.0
Using divide by two function
(differential)
2.0 VDDANA
Absolute min, max input voltage
(2)
-0,1
VDDANA
+0.1
V
Start up time
(2)
ADC with reference already
enabled
12 24 Cycles
No gain compensation
Reference buffer
5µs
Gain compensation
Reference buffer
60 Cycles
R
SAMPLE
Input channel source resistance
(2)
0.5 kΩ
C
SAMPLE
Sampling capacitance
(2)
2.9 3.6 4.3 pF
Reference input source resistance
(2)
Gain compensation 2 kΩ
No gain compensation 1 MΩ
ADC reference settling time
(2)
After changing
reference/mode
(3)
5 60 Cycles
1. These values are based on characterization. These values are not covered by test limits in production
2. These values are based on simulation. These values are not covered by test limits in production
3. Requires refresh/flush otherwise conversion time (latency) + 1
Table 9-47. Differential mode, gain=1
Symbol Parameter Conditions Min Typ Max Units
Accuracy without compensation
(1)
7ENOB
Accuracy after compensation
(1)
(INL, gain and offset) 11 ENOB
INL Integral Non Linearity
(2)
After calibration,
Gain compensation
1.2 1.7 LSBs
DNL Differential Non Linearity
(2)
After calibration 0.7 1.0 LSBs
Gain error
(2)
External reference -5.0 -1.0 5.0
mV
VDDANA/1.6 -40 40
VDDANA/2.0 -40 40
Bandgap After calibration -30 30
Gain error drift vs voltage
(1)
External reference -2 2 mV/V
Gain error drift vs temperature
(1)
After calibration + bandgap drift
If using onchip bandgap
0.08 mV/°K
Offset error
(2)
External reference -5.0 5.0
mV
VDDANA/1.6 -10 10
VDDANA/2.0 -10 10
Bandgap After calibration -10 10
Offset error drift vs voltage
(1)
-4 4 mV/V