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參數(shù)資料
| 型號： | LM308A |
| 廠商： | Motorola, Inc. |
| 英文描述： | Amplifiers and Comparators |
| 中文描述： | 放大器和比較器 |
| 文件頁數(shù)： | 4/8頁 |
| 文件大?。?/td> | 158K |
| 代理商： | LM308A |
LM308A
4
MOTOROLA ANALOG IC DEVICE DATA
SUGGESTED DESIGN APPLICATIONS
INPUT GUARDING
Special care must be taken in the assembly of printed
circuit boards to take full advantage of the low input currents
of the LM308A amplifier. Boards must be thoroughly cleaned
with alcohol and blown dry with compressed air. After
cleaning, the boards should be coated with epoxy or silicone
rubber to prevent contamination.
Figure 7. Fast (1) Summing Amplifier with
Low Input Current
(1) Power Bandwidth: 250 kHz
Small Signal Bandwidth:
3.5 MHz
Slew Rate: 10 V/
μ
s
(2) C5 =
6 X 10–8
R1
(3) In addition to increasing speed,
the LM101A raises high and low
frequency gain, increases output
drive capability and eliminates
thermal feedback.
RS
C5 (2)
Input
R1
R4
150 pF
1
6
2
3
1.0 M
Output
LM101A (3)
or equiv
Compen B
300 pF
1 M
R2
LM308A
0.002
μ
F
0.002
μ
F
150 k
Even with properly cleaned and coated boards, leakage
currents may cause trouble at +125
°
C, particularly since the
input pins are adjacent to pins that are at supply potentials.
This leakage can be significantly reduced by using guarding
to lower the voltage difference between the inputs and
adjacent metal runs. The guard, which is a conductive ring
surrounding the inputs, is connected to a low–impedance
point that is at approximately the same voltage as the inputs.
Leakage currents from high voltage pins are then absorbed
by the guard.
Figure 8. Sample and Hold
(1) Teflon, Polyethylene or Polycarbonate
Dielectric Capacitor
Output
30 pF
Q1
Q2
Input
Sample
VCC
1.0 M
1.0
μ
F (1)
Figure 9. Connection of Input Guards
Inverting Amplifier
Follower
Noninverting Amplifier
(1) Used to compensate for large source resistances.
Note:
R1 R2
R1 +R2
must be an impedance.
C1
R1
R2
Input
Output
R3 (1)
C1
Input
Output
R3 (1)
C1
R2
Input
Output
R1
R3 (1)
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| LM317LD | 3-Terminal Adjustable Output Positive Voltage Regulators |
| LM317LD | LOW CURRENT 1.2V TO 37V ADJUSTABLE VOLTAGE REGULATOR |
| LM317LZ | CAP 63V 1500UF ELECT AXIAL |
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| LM308A/D | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Precision Operational Amplifier |
| LM308AD | 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:SUPER GAIN OPERATIONAL AMPLIFIER |
| LM308AH | 制造商:Rochester Electronics LLC 功能描述: 制造商:Texas Instruments 功能描述:IC OP AMP SUPER GAIN TO-5-8 308 |
| LM308AH | 制造商:Texas Instruments 功能描述:IC OP AMP SUPER GAIN TO-5-8 308 |
| LM308AH/A+ | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Voltage-Feedback Operational Amplifier |
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