AT32UC3C0512C_14 Datasheet, PDF (63/110 Pages) ATMEL Corporation – High Performance, Low Power 32-bit AVR Microcontroller

AT32UC3C
7.8.6 Analog to Digital Converter (ADC) and sample and hold (S/H) Characteristics
Table 7-27. ADC and S/H characteristics
Symbol Parameter
Conditions
f_ADC
ADC clock
frequency
t_STARTUP Startup time
12-bit resolution mode, V_VDDANA = 3V
10-bit resolution mode, V_VDDANA = 3V
8-bit resolution mode, V_VDDANA = 3V
12-bit resolution mode, V_VDDANA = 4.5V
10-bit resolution mode, V_VDDANA = 4.5V
8-bit resolution mode, V_VDDANA = 4.5V
ADC cold start-up
ADC hot start-up
Min
Typ
t_CONV
Conversion time
(latency)
(ADCIFA.SEQCFGn.SRES)/2 + 2,
ADCIFA.CFG.SHD = 1
(ADCIFA.SEQCFGn.SRES)/2 + 3,
ADCIFA.CFG.SHD = 0
6
7
Throughput rate
12-bit resolution,
ADC clock = 1.2 MHz, V_VDDANA = 3V
10-bit resolution,
ADC clock = 1.6 MHz, V_VDDANA = 3V
12-bit resolution,
ADC clock = 1.5 MHz, V_VDDANA = 4.5V
10-bit resolution,
ADC clock = 2 MHz, V_VDDANA = 4.5V
Max
Units
1.2
1.6
2.2
MHz
1.5
2
2.4
1
ms
24
ADC clock
cycles
8
ADC clock
cycles
9
1.2
1.6
MSPS
1.5
2
Table 7-28. ADC Reference Voltage
Symbol
V_ADCREF0
V_ADCREF1
V_ADCREFP
V_ADCREFN
Parameter
ADCREF0 input voltage range
ADCREF1 input voltage range
ADCREFP input voltage
ADCREFN input voltage
Internal 1V reference
Internal 0.6*VDDANA reference
Conditions
5V Range
3V Range
5V Range
3V Range
5V Range - Voltage reference
applied on ADCREFP
3V Range - Voltage reference
applied on ADCREFP
Voltage reference applied on
ADCREFN
Min
Typ
1
1
1
1
1
1
GNDANA
1.0
0.6*V_VDDANA
Max
3.5
V_VDDANA-0.7
3.5
V_VDDANA-0.7
3.5
V_VDDANA-0.7
Unit
s
V
V
V
V
V
V
63
32117DS–AVR-01/12