ATXMEGA128A4_09 Datasheet, PDF (65/104 Pages) ATMEL Corporation – 8/16-bit XMEGA A4 Microcontroller

XMEGA A4
34.5 ADC Characteristics
Table 34-4. ADC Characteristics
Symbol Parameter
Condition
Min
RES
Resolution
Programmable: 8/12
8
INL
Integral Non-Linearity
500 ksps
-5
DNL
Differential Non-Linearity
500 ksps
Gain Error
Offset Error
ADC_clk
ADC Clock frequency
Conversion rate
Max is 1/4 of Peripheral Clock
Conversion time
(propagation delay)
(RES+2)/2+GAIN
5
RES = 8 or 12, GAIN = 0 or 1
Sampling Time
Conversion range
1/2 ADC_clk cycle
0.25
0
VREF Reference voltage
1.0
Input bandwidth
INT1V Internal 1.00V reference
INTVCC
SCALEDVCC
R_AREF
Internal V_CC/1.6
Scaled internal V_CC/10 input
Reference input resistance
Start-up time
Internal input sampling speed
Temp. sensor, V_CC/10, Bandgap
Typ
12
±2
< ±1
< ±10
< ±2
7
1.00
V_CC/1.6
V_CC/10
> 10
Max
12
5
2000
2000
8
VREF
V_cc-0.6V
100
Units
Bits
LSB
LSB
mV
mV
kHz
ksps
ADC_clk
cycles
uS
V
V
kHz
V
V
V
MΩ
µs
ksps
Table 34-5. ADC Gain Stage Characteristics
Symbol Parameter
Condition
Gain error
1 to 64 gain
Offset error
Vrms
Noise level at input
64x gain
VREF = Int. 1V
VREF = Ext. 2V
Clock rate
Same as ADC
Min
Typ
Max
Units
< ±1
%
< ±1
0.12
mV
0.06
1000
kHz
65
8069L–AVR–11/09