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參數(shù)資料
| 型號： | KM4120 |
| 廠商： | Fairchild Semiconductor Corporation |
| 英文描述： | 0.5mA, Low Cost, +2.7V & +5V, 75MHz Rail-to-Rail Amplifiers |
| 中文描述： | 0.5毫安，低成本，2.7 |
| 文件頁數(shù)： | 7/11頁 |
| 文件大?。?/td> | 288K |
| 代理商： | KM4120 |
KM4110/KM4120
DATA SHEET
REV. 1A February 2001
7
General Description
The KM4110 is a single supply, general purpose, volt-
age-feedback amplifier fabricated on a complementary
bipolar process. The KM4110 offers 75MHz unity gain
bandwidth, 50V/
μ
s slew rate, and only 505
μ
A supply
current. It features a rail-to-rail output stage and is
unity gain stable.
The design utilizes a patent pending topology that
provides increased slew rate performance. The common
mode input range extends to 300mV below ground
and to 1.2V below Vs. Exceeding these values will not
cause phase reversal. However, if the input voltage
exceeds the rails by more than 0.5V, the input ESD
devices will begin to conduct. The output will stay at
the rail during this overdrive condition.
The design uses a Darlington output stage. The out-
put stage is short circuit protected and offers
“
soft
”
saturation protection that improves recovery time.
The typical circuit schematic is shown in Figure 1.
Figure 1: Typical Configuration
For optimum response at a gain of +2, a feedback resistor
of 1k
is recommended. Figure 2 illustrates the
KM4110 frequency response with both 1k
and 2k
feedback resistors.
Enable/Disable Function (KM4120)
The KM4120 offers an active-low disable pin that can
be used to lower its supply current. Leave the pin
floating to enable the part. Pull the disable pin to the
negative supply (which is ground in a single supply
application) to disable the output. During the disable
condition, the nominal supply current will drop to
below 30
μ
A and the output will be at high impedance
with about 2pF capacitance.
Figure 2: Frequency Response vs. R
f
Power Dissipation
The maximum internal power dissipation allowed is
directly related to the maximum junction temperature.
If the maximum junction temperature exceeds 150
°
C,
some reliability degradation will occur. If the maximum
junction temperature exceeds 175
°
C for an extended
time, device failure may occur.
The KM4110 is short circuit protected. However, this
may not guarantee that the maximum junction tem-
perature (+150
°
C) is not exceeded under all condi-
tions. Follow the maximum power derating curves
shown in Figure 3 to ensure proper operation.
Figure 3: Power Derating Curves
Overdrive Recovery
For an amplifier, an overdrive condition occurs when
the output and/or input ranges are exceeded. The
recovery time varies based on whether the input or
output is overdriven and by how much the ranges are
exceeded. The KM4110 will typically recover in less
than 20ns from an overdrive condition. Figure 4
shows the KM4110 in an overdriven condition.
+
KM4110
-
R
f
0.01
μ
F
6.8
μ
F
+
Out
In
+V
s
R
g
M
Frequency (MHz)
0.1
1
10
100
G = 2
R
L
= 1k
R
f
= 1k
R
f
= 2k
M
Ambient Temperature ( C)
-50
-30
-10
10
30
50
70
90
SOIC-8 lead
0
0.5
1.0
1.5
2.0
SOT23-5 lead
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| KM4120IT6 | 制造商:FAIRCHILD 制造商全稱:Fairchild Semiconductor 功能描述:0.5mA, Low Cost, +2.7V & +5V, 75MHz Rail-to-Rail Amplifiers |
| KM4120IT6TR3 | 功能描述:運算放大器 - 運放 0.5ma 75Mhz amp RRO w/ Disable RoHS:否 制造商:STMicroelectronics 通道數(shù)量:4 共模抑制比（最小值）:63 dB 輸入補償電壓:1 mV 輸入偏流（最大值）:10 pA 工作電源電壓:2.7 V to 5.5 V 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-16 轉(zhuǎn)換速度:0.89 V/us 關(guān)閉:No 輸出電流:55 mA 最大工作溫度:+ 125 C 封裝:Reel |
| KM4120IT6TR3 | 制造商:Fairchild Semiconductor Corporation 功能描述:AMP RRO/P VFB SMD 4120 SOT-23-6 |
| KM4121 | 制造商:FAIRCHILD 制造商全稱:Fairchild Semiconductor 功能描述:0.2mA, Low Cost, +2.7V & +5V, 35MHz Rail-to-Rail Amplifiers |
| KM4121IT6TR3 | 功能描述:高速運算放大器 RoHS:否 制造商:Texas Instruments 通道數(shù)量:1 電壓增益 dB:116 dB 輸入補償電壓:0.5 mV 轉(zhuǎn)換速度:55 V/us 工作電源電壓:36 V 電源電流:7.5 mA 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Tube |
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