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| 型號： | THS4031JG |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | 100-MHz LOW-NOISE HIGH-SPEED AMPLIFIERS |
| 中文描述： | 100 MHz的低噪聲高速放大器 |
| 文件頁數(shù)： | 25/38頁 |
| 文件大小： | 674K |
| 代理商： | THS4031JG |
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THS4031, THS4032
100-MHz LOW-NOISE HIGH-SPEED AMPLIFIERS
SLOS224C – JULY 1999 – REVISED APRIL 2000
25
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
APPLICATION INFORMATION
unity-gain concerns (continued)
_
+
RC
CC
VI
RF
CL
VO
RL
Gain (dB)
Original Open
Loop Response
Unstable
Intersection
Stable
Intersection
Effective
Compensated
O.L. Response
(without CC)
0
See Note A
f
NOTE A: The difference is due to 1+RF/RC noise gain.
Figure 48. Unity Gain Compensation
driving a capacitive load
Driving capacitive loads with high-performance amplifiers is not a problem as long as certain precautions are
taken. The first is to realize that the THS403x has been internally compensated to maximize its bandwidth and
slew-rate performance. When the amplifier is compensated in this manner, capacitive loading directly on the
output will decrease the phase margin of the device leading to high-frequency ringing or oscillations. Therefore,
for capacitive loads of greater than 10 pF, it is recommended that a resistor be placed in series with the output
of the amplifier, as shown in Figure 49. A minimum value of 20
should work well for most applications. For
example, in 75-
transmission systems, setting the series resistor value to 75
both isolates any capacitance
loading and provides the proper line impedance matching at the source end.
+
_
THS403x
CLOAD
360
Input
Output
360
20
Figure 49. Driving a Capacitive Load
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| THS4031MFK | 制造商:TI 制造商全稱:Texas Instruments 功能描述:100-MHz LOW-NOISE HIGH-SPEED AMPLIFIERS |
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| THS4031MJGB | 制造商:Texas Instruments 功能描述:OP Amp Single Volt Fdbk ±16V/32V 8-Pin CDIP Tube |
| THS4032 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:100-MHz LOW-NOISE HIGH-SPEED AMPLIFIERS |
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