Atmel SAM4S Series, Preliminary Data Sheet

Page: 1114 / 1163

1114
11100B–ATARM–31-Jul-12
SAM4S Series [Preliminary]
42.7 12-Bit ADC Characteristics
Note: Use IBCTL = 00 for Sampling Frequency below 500 kHz and IBCTL = 01 between 500 kHz and 1MHz.
Table 42-25. Analog Power Supply Characteristics
Symbol Parameter Conditions Min Typ Max Units
V
VDDIN
ADC Analog Supply 12-bit or 10 bit resolution 2.4 3.0 3.6 V
ADC Analog Supply 10 bit resolution 2.0 3.6 V
Max. Voltage Ripple rms value, 10 kHz to 20 MHz 20 mV
I
VDDIN
Current Consumption
Sleep Mode (Clock OFF)
Fast Wake Up Mode (Standby CLK =
20MHz, IBCTL= 01)
Normal Mode (IBCTL= 01)
2
2.4
4.3
4
3.5
6
µA
mA
mA
Table 42-26. Channel Conversion Time and ADC Clock
Symbol Parameter Conditions Min Typ Max Units
f
ADC
ADC Clock Frequency 1 20 MHz
t
CP_ADC
ADC Clock Period 50 1000 ns
f
S
Sampling Frequency 1 MHz
t
START-UP
ADC Startup time
From OFF Mode to Normal Mode:
- Voltage Reference OFF
- Analog Circuitry OFF
From Standby Mode to Normal Mode:
- Voltage Reference ON
- Analog Circuitry OFF
20
4
30
8
40
12
µs
t
TRACKTIM
Track and Hold Time
See Section 42.7.1.1 “Track and Hold
Time versus Source Output
Impedance”
for more details
160 ns
t
CONV
Conversion Time 20 T
CP_ADC
t
cal
Calibration Time 306 T
CP_ADC
t
SETTLE
Settling Time Settling time to change offset and gain 200 ns
Table 42-27. External Voltage Reference Input
Parameter Conditions Min Typ Max Units
ADVREF Input Voltage Range, 12-bit 2.4V < V
VDDIN
< 3.6V 2.4 - VDDIN V
ADVREF Input Voltage Range, 10-bit 2.0V < V
VDDIN
< 3.6V 2.0 - VDDIN V
ADVREF Input DC impedance 6 8 10 k
Ω