MCP6566 Microchip Technology Inc., MCP6566 Datasheet - Page 17

• Manufacturer Part Number: MCP6566
• Description: 1.8v Low Power Open-drain Output Comparator
• Manufacturer: Microchip Technology Inc.

FIGURE 4-7:
Inverting Circuit.
In order to determine the trip voltages (V
for the circuit shown in
simplified to the Thevenin equivalent circuit with
respect to V
FIGURE 4-8:
Where:
Using this simplified circuit, the trip voltage can be
calculated using the following equation:
EQUATION 4-1:
Figure 2-21
typical values for V
© 2009 Microchip Technology Inc.
V
V
V
V
OH
DD
OL
SS
V
V
23
V
V
SS
THL
TLH
V
V
Low-to-High
V
TLH
THL
OUT
DD
and
=
=
= trip voltage from low-to-high
= trip voltage from high-to-low
, as shown in
R
V
V
Figure 2-24
V
23
OH
OL
23
OH
⎛
⎜
⎝
⎛
⎜
⎝
R
V
---------------------- -
R
---------------------- -
R
=
23
TLH
23
23
and V
Hysteresis Diagram for the
Thevenin Equivalent Circuit.
R
------------------
R
R
+
Figure
-
MCP656X
=
+
+
23
23
2
R
V
+
R F
R F
------------------
R
V
3
THL
R
OL
Figure
2
R
DD
can be used to determine
⎞
⎟
⎠
2
⎞
⎟
⎠
+
3
R
.
4-6, R
+
+
V
×
R
3
High-to-Low
R
SS
3
V
V
V
F
DD
23
23
4-8.
⎛
⎝
⎛
⎝
V
2
--------------------- -
R
--------------------- -
R
PU
23
and R
23
THL
R
R
R
V
+
+
F
PU
F
DD
R
R
and V
V
F
F
3
⎞
⎠
⎞
⎠
OUT
can be
V
IN
TLH
)
4.4
With this family of comparators, the power supply pin
(V
capacitor (i.e., 0.01 µF to 0.1 µF) within 2 mm for good
edge rate performance.
4.5
Reasonable capacitive loads (e.g., logic gates) have
little impact on propagation delay (see
The supply current increases with increasing toggle
frequency
capacitive loads. The output slew rate and propogation
delay performance will be reduced with higher
capacitive loads.
DD
for single supply) should have a local bypass
Bypass Capacitors
Capacitive Loads
MCP6566/6R/7/9
(Figure
2-20),
especially
DS22143A-page 17
Figure
with
higher
2-32).