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參數(shù)資料
| 型號： | LM239J |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 比較器 |
| 英文描述： | Low Power Low Offset Voltage Quad Comparators |
| 中文描述： | QUAD COMPARATOR, 9000 uV OFFSET-MAX, 1300 ns RESPONSE TIME, CDIP14 |
| 封裝： | CERDIP-14 |
| 文件頁數(shù)： | 4/8頁 |
| 文件大?。?/td> | 145K |
| 代理商： | LM239J |
LM339, LM339A, LM239, LM239A, LM2901, M2901V, MC3302
http://onsemi.com
4
Figure 7. Driving Logic
Figure 8. Squarewave Oscillator
Logic
Device
VCC
(V)
RL
k
CMOS
TTL
1/4 MC14001
1/4 MC7400
+15
+5.0
100
10
RS = Source Resistance
R1
RS
T1 = T2 = 0.69 RC
7.2
C(
μ
F)
f
R2 = R3 = R4
R1
R2 // R3 // R4
–
+
+
–
VCC
Vin
Vref
VCC
≥
4.0 V
VCC
+
C
330 k
R4
330 k
R3
R1
100 k
10 k
R1
T1
T2
VCC
VO
RS
RL
R2
330 k
APPLICATIONS INFORMATION
These quad 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 (VOL to VOH). 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 input pins.
Differential input voltages may be larger than supply
voltages without damaging the comparator’s inputs.
Voltages more negative than –300 mV should not be used.
Figure 9. Zero Crossing Detector
(Single Supply)
Figure 10. Zero Crossing Detector
(Split Supplies)
Vin(mn)
≈
0.4 V peak for 1% phase distortion (
Θ
).
D1 prevents input fromgoing negative by more than 0.6 V.
R1 + R2 = R3
R3
≤
10
Vin
10 k
D1
R1
8.2 k
6.8 k
R2
15 k
R3
+15 V
Θ
VCC
10 k
Vin
VEE
Vin
Vin(mn)
VCC
VO
VEE
Θ
Θ
10 M
R5
220 k
R4
220 k
VO
VO
+
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| LM239M | 功能描述:校驗器 IC 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 補償電壓（最大值）:6 mV 電源電流（最大值）:1350 nA 響應(yīng)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 |
| LM239MX | 功能描述:校驗器 IC 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 補償電壓（最大值）:6 mV 電源電流（最大值）:1350 nA 響應(yīng)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 |
| LM239N | 功能描述:校驗器 IC Quad GP Differential 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 補償電壓（最大值）:6 mV 電源電流（最大值）:1350 nA 響應(yīng)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 |
| LM239N,602 | 制造商:NXP Semiconductors 功能描述: |
| LM239N | 制造商:STMicroelectronics 功能描述:Voltage Comparator IC 制造商:Texas Instruments 功能描述:IC COMPARATOR QUAD DIP14 239 制造商:Texas Instruments 功能描述:IC, COMPARATOR QUAD, DIP14, 239 制造商:Texas Instruments 功能描述:IC, COMPARATOR QUAD, DIP14, 239; Comparator Type:Differential; No. of Comparators:4; Response Time:300ns; Supply Voltage Range:2V to 36V; Amplifier Case Style:DIP; No. of Pins:14; IC Output Type:CMOS, MOS, Open Collector / Drain, ;RoHS Compliant: Yes |
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