Datasheet

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 Characteristics
(1)
Symbol Parameter Conditions Min Typ Max Units
Positive input voltage range 0 V
VDDANA
V
Negative input voltage range 0 V
VDDANA
V
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 µs
Table 7-42. VDDANA scaled reference
Symbol Parameter Min Typ Max Units
SCF ACIFA.SCFi.SCF range 0 32
V
VDDANA
scaled (64 - SCF) * V
VDDANA
/ 65 V
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