Datasheet

133
42023GS–SAM–03/2014
ATSAM4L8/L4/L2
9.9.4 Analog- to Digital Converter Characteristics
Figure 9-5. Maximum input common mode voltage
Table 9-45. Operating conditions
Symbol Parameter Conditions Min Typ Max Units
Temperature range -40 +85 °C
Resolution
(1)
1. These values are based on characterization. These values are not covered by test limits in production
Max 12 12
(2)
2. Single ended or using divide by two max resolution: 11 bits
Bit
Sampling clock
(3)
3. These values are based on simulation. These values are not covered by test limits in production
Differential modes, Gain=1X 5 300
kHz
Unipolar modes, Gain=1X 5 250
f
ADC
ADC clock frequency
(3)
Differential modes 0.03 1.8
MHz
Unipolar modes 0.03 1.5
T
SAMPLEHOLD
Sampling time
(3)
Differential modes 16.5 277
µs
Unipolar modes 16.5 333
Conversion rate
(1)
1X gain, differential 300 kSps
Internal channel conversion
rate
(3)
V
VDD
/10, Bandgap and
Temperature channels
125 kSps
Conversion time (latency)
Differential mode (no windowing)
1X gain, (resolution/2)+gain
(4)
4. See Figure 9-5
6
Cycles
2X and 4X gain 7
8X and 16X gain 8
32X and 64X gain 9
64X gain and unipolar 10
M AX in p u t co mm o n m o de v o lta g e
0
0.5
1
1.5
2
2.5
3
1.6 3.6
Vcc
ICMR
vc m _ vref= 3V
vc m _ vref= 1V