- 您現(xiàn)在的位置：買(mǎi)賣(mài)IC網(wǎng) > PDF目錄363233 > NCS2530DTB (ON SEMICONDUCTOR) Triple 1.1 mA 200 MHz Current Feedback Op Amp with Enable Feature PDF資料下載
參數(shù)資料
| 型號(hào)： | NCS2530DTB |
| 廠商： | ON SEMICONDUCTOR |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | Triple 1.1 mA 200 MHz Current Feedback Op Amp with Enable Feature |
| 中文描述： | 1 CHANNEL, VIDEO AMPLIFIER, PDSO16 |
| 封裝： | LEAD FREE, TSSOP-16 |
| 文件頁(yè)數(shù)： | 12/14頁(yè) |
| 文件大?。?/td> | 329K |
| 代理商： | NCS2530DTB |
第1頁(yè)第2頁(yè)第3頁(yè)第4頁(yè)第5頁(yè)第6頁(yè)第7頁(yè)第8頁(yè)第9頁(yè)第10頁(yè)第11頁(yè)當(dāng)前第12頁(yè)第13頁(yè)第14頁(yè)
NCS2530
http://onsemi.com
12
General Design Considerations
The current feedback amplifier is optimized for use in high
performance video and data acquisition systems. For current
feedback architecture, its closedloop bandwidth depends on
the value of the feedback resistor. The closedloop bandwidth
is not a strong function of gain, as is for a voltage feedback
amplifier, as shown in Figure 29.
Figure 29. Frequency Response vs. R
F
20
15
10
5
0
5
10
0.01
0.1
1.0
10
100
1000
10000
FREQUENCY (MHz)
G
R
F
= 1.8 k
R
F
= 1.2 k
R
F
= 1 k
A
V
= +2
V
CC
= +5 V
V
EE
= 5 V
The 3.0 dB bandwidth is, to some extent, dependent on the
power supply voltages. By using lower power supplies, the
bandwidth is reduced, because the internal capacitance
increases. Smaller values of feedback resistor can be used at
lower supply voltages, to compensate for this affect.
Feedback and Gain Resistor Selection for Optimum
Frequency Response
A current feedback operational amplifier’s key advantage
is the ability to maintain optimum frequency response
independent of gain by using appropriate values for the
feedback resistor. To obtain a very flat gain response, the
feedback resistor tolerance should be considered as well.
Resistor tolerance of 1% should be used for optimum flatness.
Normally, lowering RF resistor from its recommended value
will peak the frequency response and extend the bandwidth
while increasing the value of RF resistor will cause the
frequency response to roll off faster. Reducing the value of RF
resistor too far below its recommended value will cause
overshoot, ringing, and eventually oscillation.
Since each application is slightly different, it is worth some
experimentation to find the optimal RF for a given circuit. A
value of the feedback resistor that produces
peaking is the best compromise between stability and
maximal bandwidth. It is not recommended to use a current
feedback amplifier with the output shorted directly to the
inverting input.
0.1 dB of
Printed Circuit Board Layout Techniques
Proper high speed PCB design rules should be used for all
wideband amplifiers as the PCB parasitics can affect the
overall performance. Most important are stray capacitances at
the output and inverting input nodes as it can effect peaking
and bandwidth. A space (3/16
″
is plenty) should be left around
the signal lines to minimize coupling. Also, signal lines
connecting the feedback and gain resistors should be short
enough so that their associated inductance does not cause high
frequency gain errors. Line lengths less than 1/4
″
are
recommended.
Video Performance
This device designed to provide good performance with
NTSC, PAL, and HDTV video signals. Best performance is
obtained with back terminated loads as performance is
degraded as the load is increased. The back termination
reduces reflections from the transmission line and effectively
masks transmission line and other parasitic capacitances from
the amplifier output stage.
ESD Protection
All device pins have limited ESD protection using internal
diodes to power supplies as specified in the attributes table
(See Figure 30). These diodes provide moderate protection to
input overdrive voltages above the supplies. The ESD diodes
can support high input currents with current limiting series
resistors. Keep these resistor values as low as possible since
high values degrade both noise performance and frequency
response. Under closedloop operation, the ESD diodes have
no effect on circuit performance. However, under certain
conditions the ESD diodes will be evident. If the device is
driven into a slewing condition, the ESD diodes will clamp
large differential voltages until the feedback loop restores
closedloop operation. Also, if the device is powered down
and a large input signal is applied, the ESD diodes will
conduct.
Note: Human Body Model for +IN and –IN pins are rated
at 0.8 kV while all other pins are rated at 2.0 kV.
Figure 30. Internal ESD Protection
Internal
Circuitry
External
Pin
V
CC
V
EE
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| NCS2530DTBR2 | Triple 1.1 mA 200 MHz Current Feedback Op Amp with Enable Feature |
| NCS2535 | Triple 1.4 GHz Current Feedback Op Amp with Enable Feature(帶使能端的三路1.4GHz電流反饋運(yùn)算放大器) |
| NCS2540 | Triple 750 MHz Voltage Feedback Op Amp with Enable Feature(帶使能端的三路750MHz電壓反饋運(yùn)算放大器) |
| NCS2550 | 750 MHz Voltage Feedback Op Amp(750MHz電壓反饋運(yùn)算放大器) |
| NCS7101 | 1.8 Volt Rail-to-Rail Operational Amplifier |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| NCS2530DTBG | 功能描述:運(yùn)算放大器 - 運(yùn)放 Triple 1mA 200mHz Current Feedback 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(bǔ)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 |
| NCS2530DTBR2 | 功能描述:運(yùn)算放大器 - 運(yùn)放 HFS-CF OP-AMP 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(bǔ)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 |
| NCS2530DTBR2G | 功能描述:運(yùn)算放大器 - 運(yùn)放 Triple 1mA 200mHz Current Feedback 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(bǔ)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 |
| NCS2535 | 制造商:ONSEMI 制造商全稱:ON Semiconductor 功能描述:Low Power,High Speed,Current Feedback Op Amps |
| NCS2535_06 | 制造商:ONSEMI 制造商全稱:ON Semiconductor 功能描述:Triple 1.4 GHz Current Feedback Op Amp with Enable Feature |
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。