- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄358881 > LMH6732 (National Semiconductor Corporation) High Speed Op Amp with Adjustable Bandwidth PDF資料下載
參數(shù)資料
| 型號(hào)： | LMH6732 |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | High Speed Op Amp with Adjustable Bandwidth |
| 中文描述： | 高速運(yùn)算放大器帶寬可調(diào) |
| 文件頁數(shù)： | 14/19頁 |
| 文件大小： | 970K |
| 代理商： | LMH6732 |
Application Information:
DESCRIPTION
The LMH6732 is an adjustable supply current, current-
feedback operational amplifier. Supply current and conse-
quently dynamic performance can be easily adjusted by
selecting the value of a single external resistor (R
P
).
Note:
Note: The following discussion uses the SOIC package pin numbers.
For the corresponding SOT23-6 package pin numbers, please refer to
the Connection Diagram section.
SELECTING AN OPERATING POINT
The operating point is determined by the supply current
which in turn is determined by current (I
P
) flowing out of pin
8. As the supply current is increased, the following effects
will be observed:
TABLE 1. Device Parameters Related to Supply
Current
Specification
Bandwidth
Rise Time
Enable/ Disable Speed
Output Drive
Input Bias Current
Input Impedance
Effect as I
CC
Increases
Increases
Decreases
Increases
Increases
Increases
Decreases (see Source
impedance Discussion)
Both the Electrical Characteristics pages and the Typical
Performance Characteristics section illustrate these effects
to help make the supply current vs. performance trade-off.
The supply current is adjustable over a continuous range of
more than 10 to 1 with a single resistor, R
P
, allowing for easy
trade-off between power consumption and speed. Perfor-
mance is specified and tested at I
CC
= 1mA, 3.4mA, and
9mA. (Note: Some test conditions and especially the load
resistances are different for the three supply current set-
tlings.) The performance plots show typical performance for
all three supply currents levels.
When making the supply current vs. performance trade-off, it
is first a good idea to see if one of the standard operating
points (I
= 1mA, 3.4mA, or 9mA) fits the application. If it
does, performance guaranteed on the specification pages
will apply directly to your application. In addition, the value of
R
may be obtained directly from the Electrical Characteris-
tics pages.
BEYOND 1GHz BANDWIDTH
As stated above, the LMH6732 speed can be increased by
increasing the supply current. The 3dB Bandwidth can
even reach the unprecedented value of 1.5GHz (A
= +2,
V
= 0.25V
). Of course, this comes at the expense of
power consumption (i.e. supply current). The relationship
between 3dB BW and supply current is shown in the Typi-
cal Performance Characteristics section. The supply current
would nominally have to be set to around 10mA to achieve
this speed. The absolute maximum supply current setting for
the LMH6732 is 14mA. Beyond this value, the operation may
become unpredictable.
The following discussion will assist in selecting I
for
applications that cannot operate at one of the specified
supply current settlings.
Use the typical performance plots for critical specifications to
select the best I
CC
. For parameters containing Min/Max rat-
ings in the data sheet tables, interpolate between the values
of I
CC
in the plots & specification tables to estimate the
max/min values in the application.
The simplified schematic for the supply current setting path
(I
P
) is shown below in
Figure 3
.
20060258
FIGURE 1. Recommended Non-Inverting Gain Circuit
20060259
FIGURE 2. Recommended Inverting Gain Circuit
L
www.national.com
14
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LMH6739 | Very Wideband, Low Distortion Triple Video Buffer |
| LMH6739MQ | Very Wideband, Low Distortion Triple Video Buffer |
| LMH6739MQX | Very Wideband, Low Distortion Triple Video Buffer |
| LMK316BJ475KL | UNREGULATED 60-mA CHARGE PUMP VOLTAGE INVERTER |
| LMK316BJ475ML | Low Drop Output Voltage Regulator |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LMH6732J | 制造商:Texas Instruments 功能描述: |
| LMH6732MA | 功能描述:運(yùn)算放大器 - 運(yùn)放 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 |
| LMH6732MA/NOPB | 功能描述:運(yùn)算放大器 - 運(yùn)放 Sgl 900Mhz Video 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 |
| LMH6732MAX | 功能描述:運(yùn)算放大器 - 運(yùn)放 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 |
| LMH6732MAX/NOPB | 功能描述:運(yùn)算放大器 - 運(yùn)放 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 |
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。