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參數(shù)資料
| 型號(hào)： | LM2903 |
| 廠商： | ON SEMICONDUCTOR |
| 英文描述： | Low Offset Voltage Dual Comparators(低失調(diào)電壓，2比較器) |
| 中文描述： | 低失調(diào)電壓（低失調(diào)電壓，雙路比較器2比較器） |
| 文件頁(yè)數(shù)： | 5/10頁(yè) |
| 文件大?。?/td> | 107K |
| 代理商： | LM2903 |
LM393, LM293, LM2903, LM2903V, NCV2903
http://onsemi.com
5
APPLICATIONS INFORMATION
These dual comparators feature high gain, wide
bandwidth characteristics. This gives the device oscillation
tendencies if the outputs are capacitively coupled to the
inputs via stray capacitance. This oscillation manifests itself
during output transitions (V
OL
to V
OH
). To alleviate this
situation, input resistors <10 k should be used.
The addition of positive feedback (<10 mV) is also
recommended. It is good design practice to ground all
unused pins.
Differential input voltages may be larger than supply
voltage without damaging the comparator’s inputs. Voltages
more negative than 0.3 V should not be used.
Figure 8. Zero Crossing Detector
(Single Supply)
Figure 9. Zero Crossing Detector
(Split Supply)
Figure 10. FreeRunning SquareWave Oscillator
Figure 11. Time Delay Generator
Figure 12. Comparator with Hysteresis
10
D1 prevents input from going negative by more than 0.6 V.
R1 + R2 = R3
R3
≤
R5
for small error in zero crossing.
V
in
10 k
D1
R1
8.2 k
6.8 k
R2
15 k
R3
+15 V
10 m
R5
220 k
R4
220 k
LM393
V
in(min)
0.4 V peak for 1% phase distortion (
).
+V
CC
10 k
V
in
V
EE
V
in
V
in(min)
V
CC
V
O
V
EE
LM393
+
LM393
51 k
51 k
51 k
R
L
10 k
V
CC
V
CC
V
CC
V
O
V
O
t
0
1.0 m
0.001 F
LM393
+
V
CC
V
CC
V
O
V
in
V
O
+ V
ref
V
ref
V
ref
0
0
0
V
C
t
O
t
‘‘ON’’ for t
where:
t
O
+
t
t = RC n (
V
ref
V
CC
)
R
R
L
V
C
C
LM393
+
R
S
V
CC
R
L
V
ref
R1
R2
R
S
= R1 | | R2
V
th1
= V
ref
+
(V
CC
V
ref
) R1
R1 + R2 + R
L
V
th2
= V
ref
(V
ref
V
O
Low) R1
R1 + R2
R1
t
LM393
+
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| LM2903AVQDR | 功能描述:校驗(yàn)器 IC Dual Differential Voltage Enhanced RoHS:否 制造商:STMicroelectronics 產(chǎn)品: 比較器類型: 通道數(shù)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(bǔ)償電壓（最大值）:6 mV 電源電流（最大值）:1350 nA 響應(yīng)時(shí)間: 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SC-70-5 封裝:Reel |
| LM2903AVQDRG4 | 功能描述:校驗(yàn)器 IC Dual Diff Comparator RoHS:否 制造商:STMicroelectronics 產(chǎn)品: 比較器類型: 通道數(shù)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(bǔ)償電壓（最大值）:6 mV 電源電流（最大值）:1350 nA 響應(yīng)時(shí)間: 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SC-70-5 封裝:Reel |
| LM2903AVQDRG4Q1 | 功能描述:校驗(yàn)器 IC Dual Diff Comparator RoHS:否 制造商:STMicroelectronics 產(chǎn)品: 比較器類型: 通道數(shù)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(bǔ)償電壓（最大值）:6 mV 電源電流（最大值）:1350 nA 響應(yīng)時(shí)間: 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SC-70-5 封裝:Reel |
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