参数资料
型号: LM293DR2G
厂商: ON Semiconductor
文件页数: 6/10页
文件大小: 0K
描述: IC COMP DUAL OFFSET LV 8SOIC
标准包装: 1
类型: 通用
元件数: 2
输出类型: CMOS,DTL,ECL,MOS,开路集电极,TTL
电压 - 电源,单路/双路(±): 2 V ~ 36 V,±1 V ~ 18 V
电压 - 输入偏移(最小值): 5mV @ 30V
电流 - 输入偏压(最小值): 0.25µA @ 5V
电流 - 输出(标准): 16mA @ 5V
电流 - 静态(最大值): 2.5mA
工作温度: -25°C ~ 85°C
封装/外壳: 8-SOIC(0.154",3.90mm 宽)
安装类型: 表面贴装
包装: 标准包装
产品目录页面: 1129 (CN2011-ZH PDF)
其它名称: LM293DR2GOSDKR
LM393, LM293, LM2903, LM2903V, NCV2903, NCV2903V
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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