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参数资料
| 型号： | LTC6405IMS8E#TRPBF |
| 厂商： | LINEAR TECHNOLOGY CORP |
| 元件分类： | 模拟信号调理 |
| 英文描述： | SPECIALTY ANALOG CIRCUIT, PDSO8 |
| 封装： | LEAD FREE, MSOP-8 |
| 文件页数： | 10/24页 |
| 文件大小： | 281K |
| 代理商： | LTC6405IMS8E#TRPBF |
LTC6405
18
6405fa
Output Common Mode Voltage Range
The output common mode voltage is dened as the aver-
age of the two outputs:
V
OUTCM = VOCM =
V+OUT + V–OUT
2
The VOCM pin sets this average by an internal common
mode feedback loop which internally forces VOUTCM=VOCM.
The output common mode range extends from 0.5V above
V– to typically 1V below V+. The VOCM voltage is internally
set by a resistive divider between the supplies, developing
a default voltage potential of 2.5V with a 5V supply.
In single supply applications, where the LTC6405 is used
to interface to an ADC, the optimal common mode input
range to the ADC is often determined by the ADC’s refer-
ence. If the ADC makes a reference available for setting
the input common mode voltage, it can be directly tied
to the VOCM pin (as long as it is able to drive the 19kΩ
Thevenin equivalent input impedance presented by the
VOCM pin).
The VOCM pin should be bypassed with a high quality
ceramic bypass capacitor of at least 0.01μF to lter any
common mode noise rather than being converted to dif-
ferential noise and to prevent common mode signals on
this pin from being inadvertently converted to differential
signals by impedance mismatches both externally and
internally to the IC.
APPLICATIONS INFORMATION
Output Filter Considerations and Use
Filtering at the output of the LTC6405 is often desired to
provide anti-aliasing or to improve signal to noise ratio.
To simplify this ltering, the LTC6405 in the QFN package
includes an additional pair of differential outputs (+OUTF
and –OUTF) which incorporate an internal lowpass RC
network with a –3dB bandwidth of 850MHz (Figure 7).
These pins each have an output resistance of 50Ω (toler-
ance ±12%). Internal capacitances are 1.25pF (tolerance
±15%) to V– on each ltered output, plus an additional
1.25pF (tolerance ±15%) capacitor connected between the
two ltered outputs. This resistor/capacitor combination
creates ltered outputs that look like a series 50Ω resistor
with a 3.75pF capacitor shunting each ltered output to
AC ground, providing a –3dB bandwidth of 850MHz, and
a noise bandwidth of 1335MHz. The lter cutoff frequency
is easily modied with just a few external components. To
increase the cutoff frequency, simply add two equal value
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC6405IUD | 制造商:Linear Technology 功能描述:DIFF AMP 5V 2.7GHZ R/R 16QFN |
| LTC6405IUD#PBF | 功能描述:IC DIFF AMP/DRIVER R-R 16-QFN RoHS:是 类别:集成电路 (IC) >> 线性 - 放大器 - 专用 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:60 系列:- 类型:可变增益放大器 应用:CATV 安装类型:表面贴装 封装/外壳:20-WQFN 裸露焊盘 供应商设备封装:20-TQFN-EP（5x5） 包装:托盘 |
| LTC6405IUD#TR | 制造商:Linear Technology 功能描述:DIFF-AMPLIFIER, 2.7GHZ, 690V/US, QFN-16, No. of Amplifiers:1, Input Offset Voltage:6mV, Bandwidth:2.7GHz, Amplifier Case Style:QFN, No. of Pins:16, Supply Voltage Range:4.5V to 5.25V, Slew Rate:690V/s, Supply Current:18mA, MSL:- , RoHS Compliant: No |
| LTC6405IUD#TRPBF | 功能描述:IC DIFF AMP/DRIVER R-R 16-QFN RoHS:是 类别:集成电路 (IC) >> 线性 - 放大器 - 专用 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:60 系列:- 类型:可变增益放大器 应用:CATV 安装类型:表面贴装 封装/外壳:20-WQFN 裸露焊盘 供应商设备封装:20-TQFN-EP（5x5） 包装:托盘 |
| LTC6405IUD-PBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:2.7GHz, 5V, Low Noise, Rail-to-Rail Input Differential Amplifi er/Driver |
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