Datasheet

919
32142D–06/2013
ATUC64/128/256L3/4U
35.9.8 Analog Comparator Characteristics
Notes: 1. AC.CONFn.FLEN and AC.CONFn.HYS fields, refer to the Analog Comparator Interface chapter.
2. Referring to f
AC
.
3. These values are based on simulation and characterization of other AVR microcontrollers manufactured in the same pro-
cess technology. These values are not covered by test limits in production.
35.9.9 Capacitive Touch Characteristics
35.9.9.1 Discharge Current Source
Note: 1. These values are based on simulation and characterization of other AVR microcontrollers manufactured in the same pro-
cess technology. These values are not covered by test limits in production.
Table 35-35. Analog Comparator Characteristics
Symbol Parameter Condition Min Typ Max Units
Positive input
voltage range
(3)
-0.2 V
VDDIO
+ 0.3
V
Negative input
voltage range
(3)
-0.2 V
VDDIO
- 0.6
Statistical offset
(3)
V
ACREFN
= 1.0V,
f
AC
= 12MHz,
filter length = 2,
hysteresis = 0
(1)
20 mV
f
AC
Clock frequency for
GCLK4
(3)
12 MHz
Throughput rate
(3)
f
AC
= 12MHz 12 000 000
Comparisons
per second
Propagation delay
Delay from input
change to
Interrupt Status
Register Changes
ns
I
AC
Current
consumption
(3)
All channels,
VDDIO = 3.3V,
f
A
= 3MHz
420 µA
t
STARTUP
Startup time 3 cycles
Input current per
pin
(3)
0.2 µA/MHz
(2)
Table 35-36. DICS Characteristics
Symbol Parameter Min Typ Max Unit
R
REF
Internal resistor 170 kOhm
k Trim step size
(1)
0.7 %
1
t
CLKACIFB
f
AC

----------------------------------------
3+


t
CLKACIFB
