
64
32117DS–AVR-01/12
AT32UC3C
Figure 7-3.
ADC input
Table 7-29.
ADC Decoupling requirements
Symbol
Parameter
Conditions
Min
Typ
Max
Units
C
ADCREFPN
ADCREFP/ADCREFN capacitance
No voltage reference appplied on
ADCREFP/ADCREFN
100
nF
Table 7-30.
ADC Inputs
Symbol
Parameter
Conditions
Min
Typ
Max
Units
V
ADCINn
ADC input voltage range
0
V
VDDANA
V
C
ONCHIP
Internal Capacitance
ADC used without S/H
5
pF
ADC used with S/H
4
R
ONCHIP
Switch resistance
ADC used without S/H
5.1
k
Ω
ADC used with S/H
4.6
CSOURCE
VIN
RSOURCE
ADCIN
RONCHIP
UC3C
CONCHIP
Table 7-31.
ADC Transfer Characteristics 12-bit Resolution Mod
e(1)Symbol
Parameter
Conditions
Min
Typ
Max
Units
RES
Resolution
Differential mode,
V
VDDANA = 3V,
VADCREF0 = 1V,
ADCFIA.SEQCFGn.SRES = 0
(F
adc = 1.2MHz)
12
Bit
INL
Integral Non-Linearity
5LSB
DNL
Differential Non-Linearity
3
LSB
Offset error
-7
7
mV
Gain error
-20
20
mV