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參數資料
| 型號： | MCP6541RT |
| 廠商： | Microchip Technology Inc. |
| 英文描述： | Push-Pull Output Sub-Microamp Comparators |
| 中文描述： | 推挽式輸出子微安比較 |
| 文件頁數： | 13/29頁 |
| 文件大?。?/td> | 573K |
| 代理商： | MCP6541RT |
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2003 Microchip Technology Inc.
DS21696C-page 13
MCP6541/2/3/4
Where:
Using this simplified circuit, the trip voltage can be
calculated using the following equation:
EQUATION
Figure 2-19 and Figure 2-22 can be used to determine
typical values for V
OH
and V
OL
.
3.5
Bypass Capacitors
With this family of comparators, the power supply pin
(V
DD
for single supply) should have a local bypass
capacitor (i.e., 0.01 μF to 0.1 μF) within 2 mm for good
edge rate performance.
3.6
Capacitive Loads
Reasonable capacitive loads (e.g., logic gates) have
little impact on propagation delay (see Figure 2-27).
The supply current increases with increasing toggle
frequency (Figure 2-30), especially with higher
capacitive loads.
3.7
Battery Life
In order to maximize battery life in portable
applications, use large resistors and small capacitive
loads. Also, avoid toggling the output more than
necessary and do not use chip select (CS) to conserve
power for short periods of time. Capacitive loads will
draw additional power at start-up.
3.8
PCB Surface Leakage
In applications where low input bias current is critical,
PCB (Printed Circuit Board) surface leakage effects
need to be considered. Surface leakage is caused by
humidity, dust or other contamination on the board.
Under low humidity conditions, a typical resistance
between nearby traces is 10
12
. A 5V difference would
cause 5 pA, if current-to-flow. This is greater than the
MCP6541/2/3/4 family’s bias current at 25°C (1 pA,
typ).
The easiest way to reduce surface leakage is to use a
guard ring around sensitive pins (or traces). The guard
ring is biased at the same voltage as the sensitive pin.
An example of this type of layout is shown in
Figure 3-8.
FIGURE 3-8:
for Inverting Circuit.
Example Guard Ring Layout
1.
Inverting Configuration (Figures 3-5 and 3-8):
a.
Connect the guard ring to the non-inverting
input pin (V
IN
+). This biases the guard ring
to the same reference voltage as the
comparator (e.g., V
DD
/2 or ground).
b.
Connect the inverting pin (V
IN
–) to the input
pad without touching the guard ring.
Non-inverting Configuration (Figure 3-3):
a.
Connect the non-inverting pin (V
IN
+) to the
input pad without touching the guard ring.
b.
Connect the guard ring to the inverting input
pin (V
IN
–).
2.
R
23
R
R
R
2
+
R
3
------------------
=
V
23
R
+
R
2
R
3
------------------
V
DD
×
=
V
THL
V
OH
R
+
R
23
RF
----------------------
V
23
R
+
R
23
R
F
---------------------
+
=
V
TLH
V
OL
R
+
R
23
RF
----------------------
V
23
R
+
R
23
R
F
---------------------
+
=
V
TLH
= trip voltage from low to high
V
THL
= trip voltage from high to low
Guard Ring
V
SS
V
IN
-
V
IN
+
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| MCP6541RT-E/OT | 功能描述:校驗器 IC Single 1.6V Push/ Pull Comp RoHS:否 制造商:STMicroelectronics 產品: 比較器類型: 通道數量: 輸出類型:Push-Pull 電源電壓-最大:5.5 V 電源電壓-最小:1.1 V 補償電壓（最大值）:6 mV 電源電流（最大值）:1350 nA 響應時間: 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:SC-70-5 封裝:Reel |
| MCP6541RT-I/OT | 功能描述:校驗器 IC Sgl 1.6V Push/Pull RoHS:否 制造商:STMicroelectronics 產品: 比較器類型: 通道數量: 輸出類型:Push-Pull 電源電壓-最大:5.5 V 電源電壓-最小:1.1 V 補償電壓（最大值）:6 mV 電源電流（最大值）:1350 nA 響應時間: 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:SC-70-5 封裝:Reel |
| MCP6541T-E/LT | 功能描述:校驗器 IC SNGL 16V Push/Pull Comparator E temp RoHS:否 制造商:STMicroelectronics 產品: 比較器類型: 通道數量: 輸出類型:Push-Pull 電源電壓-最大:5.5 V 電源電壓-最小:1.1 V 補償電壓（最大值）:6 mV 電源電流（最大值）:1350 nA 響應時間: 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:SC-70-5 封裝:Reel |
| MCP6541T-E/MS | 功能描述:校驗器 IC Single 1.6V Push/ Pull Comp RoHS:否 制造商:STMicroelectronics 產品: 比較器類型: 通道數量: 輸出類型:Push-Pull 電源電壓-最大:5.5 V 電源電壓-最小:1.1 V 補償電壓（最大值）:6 mV 電源電流（最大值）:1350 nA 響應時間: 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:SC-70-5 封裝:Reel |
| MCP6541T-E/OT | 功能描述:校驗器 IC Single 1.6V Push/ Pull Comp RoHS:否 制造商:STMicroelectronics 產品: 比較器類型: 通道數量: 輸出類型:Push-Pull 電源電壓-最大:5.5 V 電源電壓-最小:1.1 V 補償電壓（最大值）:6 mV 電源電流（最大值）:1350 nA 響應時間: 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:SC-70-5 封裝:Reel |
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