Datasheet

65
8069R–AVR–06/2013
XMEGA A4
Not recommended for new designs -
Use XMEGA A4U series
34.5 ADC Characteristics
Note: 1. Refer to ”Bandgap Characteristics” on page 66 for more parameter details.
Table 34-5. ADC Characteristics
Symbol Parameter Condition Min Typ Max Units
RES Resolution Programmable: 8/12 8 12 12 Bits
INL Integral Non-Linearity 500 ksps -5 ±2 5
LSB
DNL Differential Non-Linearity 500 ksps < ±1
Gain Error < ±10
mV
Offset Error < ±2
ADC
clk
ADC Clock frequency Max is 1/4 of Peripheral Clock 2000 kHz
Conversion rate 2000 ksps
Conversion time
(propagation delay)
(RES+2)/2+GAIN
RES = 8 or 12, GAIN = 0 or 1
578
ADC
clk
cycles
Sampling Time 1/2 ADC
clk
cycle 0.25 uS
Conversion range 0 VREF
VAVCC Analog Supply Voltage V
cc
-0.3 V
cc
+0.3
VREF Reference voltage 1.0 V
cc
-0.6V
Input bandwidth kHz
INT1V Internal 1.00V reference
(1)
1.00
VINTVCC Internal V
CC
/1.6 V
CC
/1.6
SCALEDVCC
Scaled internal V
CC
/10 input V
CC
/10
R
AREF
Reference input resistance > 10 M
Start-up time 12 24
ADC
clk
cycles
Internal input sampling speed
Temp. sensor, V
CC
/10, Bandgap
100 ksps
Table 34-6. ADC Gain Stage Characteristics
Symbol Parameter Condition Min Typ Max Units
Gain error 1 to 64 gain < ±1 %
Offset error < ±1
mV
Vrms Noise level at input 64x gain
VREF = Int. 1V 0.12
VREF = Ext. 2V 0.06
Clock rate Same as ADC 1000 kHz