
69
32117DS–AVR-01/12
AT32UC3C
7.8.8
Analog Comparator Characteristics
Note:
1. The measures are done without any I/O activity on VDDANA/GNDANA power domain.
7.8.9
USB Transceiver Characteristics
7.8.9.1
Electrical Characteristics
The USB on-chip buffers comply with the Universal Serial Bus (USB) v2.0 standard. All AC
parameters related to these buffers can be found within the USB 2.0 electrical specifications.
Table 7-41.
Analog Comparator Characterist
ics(1)Symbol
Parameter
Conditions
Min
Typ
Max
Units
Positive input voltage range
0
V
VDDANA
V
Negative input voltage range
0
V
VDDANA
V
OFFSET
Offset
No hysteresis, Low Power mode
-29
29
mV
No hysteresis, High Speed mode
-16
16
mV
V
HYST
Hysteresis
Low hysteresis, Low Power mode
7
44
mV
Low hysteresis, High Speed mode
5
34
High hysteresis, Low Power mode
16
102
mV
High hysteresis, High Speed mode
12
69
t
DELAY
Propagation delay
Low Power mode
2.9
us
High Speed mode
0.096
t
STARTUP
Start-up time
20
s
Table 7-42.
VDDANA scaled reference
Symbol
Parameter
Min
Typ
Max
Units
SCF
ACIFA.SCFi.SCF range
0
32
VVDDANA scaled
(64 - SCF) * VVDDANA / 65
V
VDDANA voltage accuracy
3.2
%
Table 7-43.
Electrical Parameters
Symbol
Parameter
Conditions
Min.
Typ.
Max.
Unit
R
EXT
Recommended external USB series
resistor
In series with each USB pin with
±5%
39
Ω