參數(shù)資料
型號(hào): LM293DG
廠商: ON Semiconductor
文件頁(yè)數(shù): 6/10頁(yè)
文件大?。?/td> 0K
描述: IC COMP DUAL OFFSET LV 8-SOIC
標(biāo)準(zhǔn)包裝: 98
類型: 通用
元件數(shù): 2
輸出類型: CMOS,DTL,ECL,MOS,開(kāi)路集電極,TTL
電壓 - 電源,單路/雙路(±): 2 V ~ 36 V,±1 V ~ 18 V
電壓 - 輸入偏移(最小值): 5mV @ 30V
電流 - 輸入偏壓(最小值): 0.25µA @ 5V
電流 - 輸出(標(biāo)準(zhǔn)): 16mA @ 5V
電流 - 靜態(tài)(最大值): 2.5mA
工作溫度: -25°C ~ 85°C
封裝/外殼: 8-SOIC(0.154",3.90mm 寬)
安裝類型: 表面貼裝
包裝: 管件
產(chǎn)品目錄頁(yè)面: 1129 (CN2011-ZH PDF)
其它名稱: LM293DG-ND
LM293DGOS
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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