參數(shù)資料
型號(hào): LM339DR2
廠商: ON Semiconductor
文件頁數(shù): 8/11頁
文件大小: 0K
描述: IC COMP QUAD SGL SUPPLY 14SOIC
產(chǎn)品變化通告: Product Obsolescence 14/Apr/2010
標(biāo)準(zhǔn)包裝: 1
類型: 通用
元件數(shù): 4
輸出類型: CMOS,開路集電極,TTL
電壓 - 電源,單路/雙路(±): 3 V ~ 36 V,±1.5 V ~ 18 V
電流 - 靜態(tài)(最大值): 2.5mA
封裝/外殼: 14-SOIC(0.154",3.90mm 寬)
安裝類型: 表面貼裝
包裝: 剪切帶 (CT)
其它名稱: LM339DR2OSCT
LM339, LM239, LM2901, LM2901V, NCV2901, MC3302
http://onsemi.com
6
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
W 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.
10
Figure 9. Zero Crossing Detector
(Single Supply)
Figure 10. Zero Crossing Detector
(Split Supplies)
Vin(min) ≈ 0.4 V peak for 1% phase distortion (Dq).
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
*
q
VCC
10 k
Vin
VEE
Vin
Vin(min)
VCC
VO
VEE
Dq
q
*
)
10 M
R5
220 k
R4
220 k
VO
+
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