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參數(shù)資料
| 型號： | LTC6405IUD#PBF |
| 廠商： | Linear Technology |
| 文件頁數(shù)： | 11/26頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC DIFF AMP/DRIVER R-R 16-QFN |
| 標準包裝： | 121 |
| 類型： | ADC 驅動器 |
| 應用： | 數(shù)據(jù)采集 |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 16-WFQFN 裸露焊盤 |
| 供應商設備封裝： | 16-QFN-EP（3x3） |
| 包裝： | 管件 |
| 產品目錄頁面： | 1323 (CN2011-ZH PDF) |
LTC6405
19
6405fb
For more information www.linear.com/6405
applications inForMation
tance. The outputs of the LTC6405 are designed to drive
5pF to ground, so care should be taken to not lower the
effective impedance between +OUT and +OUTF or –OUT
and –OUTF below 15Ω.
To decrease filter bandwidth, add two external capacitors,
one from +OUTF to ground, and the other from –OUTF to
ground. A single differential capacitor connected between
+OUTF and –OUTF can also be used, but since it is being
driven differentially it will appear at each filtered output
as a single-ended capacitance of twice the value. To halve
the filter bandwidth, for example, two 3.9pF capacitors
could be added (one from each filtered output to ground).
Alternatively, one 1.8pF capacitor could be added between
the filtered outputs, which also halves the filter bandwidth.
Combinations of capacitors could be used as well; a three
capacitor solution of 1.2pF from each filtered output to
ground plus a 1.2pF capacitor between the filtered outputs
would also halve the filter bandwidth (Figure 9).
Noise Considerations
The LTC6405’s input referred voltage noise is 1.6nV/√Hz.
Its input referred current noise is 2.4pA/√Hz. In addition
to the noise generated by the amplifier, the surrounding
feedback resistors also contribute noise. A noise model is
shown in Figure 10. The output noise generated by both
the amplifier and the feedback components is governed
by the equation:
eno =
eni 1+
RF
RI
2
+ 2 In RF
(
)2 +
2 enRI
RF
RI
2
+ 2 enRF2
A plot of this equation, and a plot of the noise generated
by the feedback components for the LTC6405 is shown
in Figure 11.
Figure 9. LTC6405 Filter Topology Modified for 1/2x Filter
Bandwidth (Three External Capacitors)
–
+
7
8
14
13
12
V–
9
V–
6405 F09
LTC6405
FILTERED OUTPUT
(425MHz)
1.25pF
50
1.25pF
1.2pF
+OUTF
–OUTF
+OUT
+OUTF
–OUT
–OUTF
Figure 10. Noise Model of the LTC6405
Figure 11. LTC6405 Output Spot Noise vs Spot Noise
Contributed by Feedback Network Alone
–
+
eno2
RF
VOCM
enRI2
RF
RI
enRF2
enRI2
encm2
eni2
enRF2
in+2
in–2
6405 F10
RI = RF ()
10
0.1
1
10
100
1000
10000
6405 F11
TOTAL (AMPLIFIER AND
FEEDBACK NETWORK)
OUTPUT NOISE
FEEDBACK NETWORK
NOISE ALONE
nV
/Hz
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| LTC6405IUD-TRPBF | 制造商:LINER 制造商全稱:Linear Technology 功能描述:2.7GHz, 5V, Low Noise, Rail-to-Rail Input Differential Amplifi er/Driver |
| LTC6406 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:1.3GHz Low Noise, Low Distortion Differential ADC Driver for 140MHz IF |
| LTC6406CMS8E#PBF | 功能描述:IC AMP/DRIVER DIFF 8-MSOP RoHS:是 類別:集成電路 (IC) >> 線性 - 放大器 - 專用 系列:- 產品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:60 系列:- 類型:可變增益放大器 應用:CATV 安裝類型:表面貼裝 封裝/外殼:20-WQFN 裸露焊盤 供應商設備封裝:20-TQFN-EP（5x5） 包裝:托盤 |
| LTC6406CMS8E#TRPBF | 功能描述:IC AMP/DRIVER DIFF 8-MSOP RoHS:是 類別:集成電路 (IC) >> 線性 - 放大器 - 專用 系列:- 產品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:60 系列:- 類型:可變增益放大器 應用:CATV 安裝類型:表面貼裝 封裝/外殼:20-WQFN 裸露焊盤 供應商設備封裝:20-TQFN-EP（5x5） 包裝:托盤 |
| LTC6406CMS8E-PBF | 制造商:LINER 制造商全稱:Linear Technology 功能描述:3GHz, Low Noise, Rail-to-Rail Input Differential Amplifi er/Driver |
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