ATXMEGA384C3_14 Datasheet, PDF (71/125 Pages) ATMEL Corporation – 8/16-bit Atmel XMEGA C3 Microcontroller

35.6 ADC Characteristics
Table 35-8. Power Supply, Reference, and Input Range
Symbol
AV_CC
V_REF
R_in
C_in
R_AREF
C_AREF
Vin
V
Parameter
Condition
Analog supply voltage
Reference voltage
Input resistance
Switched
Input capacitance
Switched
Reference input resistance (leakage only)
Reference input capacitance Static load
Input range
Conversion range
Differential mode, Vinp - Vinn
Conversion range
Single ended unsigned mode, Vinp
Fixed offset voltage
Min.
V_CC-0.3
1
0
-V_REF
-V
Typ.
>10
7
200
Max.
V_CC+0.3
AV_CC-0.6
4.5
5
V_REF
V_REF
V_REF-V
Units
V
k
pF
M
pF
V
lsb
Table 35-9. Clock and Timing
Symbol Parameter
Clk_ADC ADC clock frequency
f_ClkADC
Sample rate
f_ADC
Sample rate
Sampling time
Conversion time (latency)
Start-up time
ADC settling time
Condition
Maximum is 1/4 of peripheral clock
frequency
Measuring internal signals
Current limitation (CURRLIMIT) off
CURRLIMIT = LOW
CURRLIMIT = MEDIUM
CURRLIMIT = HIGH
Configurable in steps of 1/2 Clk_ADC cycles
up to 32 Clk_ADC cycles
(RES+1)/2 + GAIN
RES (Resolution) = 8 or 12, GAIN=0 to 3
ADC clock cycles
After changing reference or input mode
Min.
100
100
16
16
16
16
16
0.28
5.5
Typ.
12
7
Max.
1800
125
300
300
250
150
50
320
Units
kHz
ksps
µs
10
Clk_ADC
24
cycles
7
XMEGA C3 [DATASHEET]
71
Atmel-8361F-AVR-ATxmega384C3-Datasheet–11/2014