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参数资料
| 型号： | LM293 |
| 厂商： | ON SEMICONDUCTOR |
| 英文描述： | Low Offset Voltage Dual Comparators(低失调电压，2比较器) |
| 中文描述： | 低失调电压（低失调电压，双路比较器2比较器） |
| 文件页数： | 6/10页 |
| 文件大小： | 107K |
| 代理商： | LM293 |
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 (VOL to VOH). To alleviate this
situation, input resistors < 10 k
W 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.
Vin
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
Vin(min) [ 0.4 V peak for 1% phase distortion (DQ).
*
Q
+VCC
10 k
Vin
VEE
Vin
Vin(min)
VCC
VO
VEE
DQ
Q
LM393
+
LM393
51 k
RL
10 k
VCC
VO
t
0
1.0 m
W
0.001
mF
+
LM393
VCC
VO
Vin
VO
+ Vref
Vref
0
VC
tO
t
‘‘ON’’ for t
tO + Dt
where:
Dt = RC n (
Vref
VCC
)
R
RL
VC
C
LM393
+
RS
VCC
RL
Vref
R1
R2
RS = R1 | | R2
Vth1 = Vref +
(VCC Vref) R1
R1 + R2 + RL
Vth2 = Vref
(Vref VO Low) R1
R1 + R2
R1
t
+
LM393
)
*
)
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LM2930-5KC | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| LM2930A | 功能描述:低压差稳压器 - LDO 5.0V 0.4A Positive RoHS:否 制造商:Texas Instruments 最大输入电压:36 V 输出电压:1.4 V to 20.5 V 回动电压（最大值）:307 mV 输出电流:1 A 负载调节:0.3 % 输出端数量: 输出类型:Fixed 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-20 |
| LM2930S-5.0 | 制造商:Texas Instruments 功能描述: 制造商:Texas Instruments 功能描述:V REG LDO +5.0V SMD 2930 TO2633 |
| LM2930S-5.0 WAF | 制造商:Texas Instruments 功能描述: |
| LM2930S-5.0 | 制造商:Texas Instruments 功能描述:V REG LDO +5.0V SMD 2930 TO2633 |
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