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參數(shù)資料
| 型號： | LM148 |
| 廠商： | RAYTHEON SEMICONDUCTOR |
| 元件分類： | 運動控制電子 |
| 英文描述： | Low Power Quad 741 Operational Amplifier(低功耗、四通道741型運算放大器) |
| 中文描述： | QUAD OP-AMP, 6000 uV OFFSET-MAX, 1 MHz BAND WIDTH, PDIP14 |
| 文件頁數(shù)： | 8/16頁 |
| 文件大?。?/td> | 97K |
| 代理商： | LM148 |
LM148
PRODUCT SPECIFICATION
8
Applications Discussion
The LM148 low power quad operational amplifier exhibits
performance comparable to the popular 741. Substitution
can therefore be made with no change in circuit behavior.
The input characteristics of these devices allow differential
voltages which exceed the supplies. Output phase will be
correct as long as one of the inputs is within the operating
common mode range. If both exceed the negative limit, the
output will latch positive. Current limiting resistors should
be used on the inputs in case voltages become excessive.
When capacitive loading becomes much greater than 100pF,
a resistor should be placed between the output and feedback
connection in order to reduce phase shift.
The LM148 is short circuit protected to ground and supplies
continuously when only one of the four amplifiers is shorted.
If multiple shorts occur simultaneously, the unit can be
destroyed due to excessive power dissipation.
To assure stability and to minimize pickup, feedback resis-
tors should be placed close to the input to maximize the feed-
back pole frequency (a function of input to ground
capacitance). A good rule of thumb is that the feedback pole
frequency should be 6 times the operating -3.0B frequency.
If less, a lead capacitor should be placed between the output
and input.
Figure 21. One Decade Low Distortion Sinewave Generator
65-148-23
LM148
B
R1
V
OUT
R3
R6
C1
R5
C2
R2
Q1
R4
C1
R7
C3
R1
D1
D2
F = 1
2 R1C1
R4R5
R3
K =
R ~
F = 5.0 KHz, THD 0.03%
R1 = 100K pot., C1 = 0.0047 F, C2 = 0.01 F, C3 = 0.1 F, R2 = R6 = R7 = 1M, R3 = 5.1K, R4 = 12 .
R5 = 240 , Q1 = NS5102, D1 = 1N914, D2 = 3.6V avalanche diode (ex. LM103), Vs
A simpler version with some distortion degradation at high frequencies can be made by using A1
as a simple inverting amplifier, and by putting back to back zeners in feedback loop of A3.
1
R
1
R4
1
R5
R
V
V
m
GS
P
m
+
+
1 -
m
W
LM148
C
LM148
A
3
2
1
5
6
7
10
9
8
1/2
A1
A3
A2
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LM148 MD8 | 制造商:Texas Instruments 功能描述:QUAD 741 OP AMP DIE - Gel-pak, waffle pack, wafer, diced wafer on film |
| LM148/883 | 制造商:National Semiconductor Corporation 功能描述: 制造商:Texas Instruments 功能描述: |
| LM148_02 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:QUAD BIPOLAR OPERATIONAL AMPLIFIERS |
| LM148_06 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:QUADRUPLE OPERATIONAL AMPLIFIERS |
| LM148D | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:FOUR UA741 QUAD BIPOLAR OPERATIONAL AMPLIFIERS |
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