- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄8608 > LTC6404HUD-4#TRPBF (Linear Technology)IC AMP/DRIVER DIFF 16-QFN PDF資料下載
參數(shù)資料
| 型號： | LTC6404HUD-4#TRPBF |
| 廠商： | Linear Technology |
| 文件頁數(shù)： | 18/28頁 |
| 文件大小： | 0K |
| 描述： | IC AMP/DRIVER DIFF 16-QFN |
| 標準包裝： | 2,500 |
| 類型： | ADC 驅(qū)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： | 帶卷 (TR) |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁當前第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁
LTC6404
25
6404f
APPLICATIONS INFORMATION
The LTC6404’s input referred voltage noise contributes the
equivalent noise of a 140
Ω resistor. When the feedback
network is comprised of resistors whose values are less
than this, the LTC6404’s output noise is voltage noise
dominant (See Figure 10.):
ee
R
no
ni
F
I
≈+
1
Feedback networks consisting of resistors with values
greater than about 200
Ω will result in output noise which
is resistor noise and amplier current noise dominant.
eI
R
kT R
no
n
F
I
F
≈
() ++
21
4
2
Lower resistor values (<100
Ω)alwaysresultinlowernoise
at the penalty of increased distortion due to increased load-
ing of the feedback network on the output. Higher resistor
values (but still less than 400
Ω) will result in higher output
noise, but improved distortion due to less loading on the
output. The optimal feedback resistance for the LTC6404
runs between 100
Ω to 400Ω. Higher resistances are not
recommended.
The differential ltered outputs OUTF+ and OUTF– will have
a little higher spot noise than the unltered outputs (due to
the two 50
Ω resistors which contribute 0.9nV/√Hz each),
but actually will provide superior Signal-to-Noise in noise
bandwidths exceeding 139MHz due to the noise-ltering
function the lter provides.
Layout Considerations
Because the LTC6404 is a very high speed amplier, it is
sensitive to both stray capacitance and stray inductance.
Three pairs of power supply pins are provided to keep the
power supply inductance as low as possible to prevent
degradation of amplier 2nd Harmonic performance. It is
critical that close attention be paid to supply bypassing. For
single supply applications (Pins 3, 9 and 12 grounded) it
is recommended that 3 high quality 0.1μF surface mount
ceramic bypass capacitor be placed between pins 2 and
3, between pins 11and 12, and between pins10 and 9 with
direct short connections. Pins 3, 9 and 10 should be tied
directly to a low impedance ground plane with minimal
routing. For dual (split) power supplies, it is recommended
that at least two additional high quality, 0.1μF ceramic
capacitors are used to bypass pin V+ to ground and V– to
ground, again with minimal routing. For driving large loads
(<200
Ω),additionalbypasscapacitancemaybeneededfor
optimal performance. Keep in mind that small geometry
(e.g. 0603) surface mount ceramic capacitors have a much
higher self resonant frequency than do leaded capacitors,
and perform best in high speed applications.
Any stray parasitic capacitances to ground at the sum-
ming junctions IN+, and IN– should be kept to an absolute
minimum even if it means stripping back the ground plane
away from any trace attached to this node. This becomes
especially true when the feedback resistor network uses
resistor values >400
Ω in circuits with RF = RI. Excessive
peaking in the frequency response can be mitigated by add-
ing small amounts of feedback capacitance (0.5pF to 2pF)
around RF. Always keep in mind the differential nature of
the LTC6404, and that it is critical that the load impedances
seen by both outputs (stray or intended) should be as bal-
anced and symmetric as possible. This will help preserve
the natural balance of the LTC6404, which minimizes the
generation of even order harmonics, and preserves the
rejection of common mode signals and noise.
It is highly recommended that the VOCM pin be either hard
tied to a low impedance ground plane (in split supply
applications), or bypassed to ground with a high quality
ceramic capacitor whose value exceeds 0.01μF. This will
help stabilize the common mode feedback loop as well as
prevent thermal noise from the internal voltage divider and
Figure 10. LTC6404-1 Output Spot Noise vs Spot Noise
Contributed by Feedback Network Alone
RF = RI (Ω)
10
0.1
nV
/√Hz
1
10
100
1k
10k
6404 F10
FEEDBACK RESISTOR
NETWORK NOISE ALONE
TOTAL (AMPLIFIER AND
FEEDBACK NETWORK)
OUTPUT NOISE
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LTC2610IGN#TRPBF | IC DAC R-R 14-BIT OCTAL 16-SSOP |
| LTC6409HUDB#TRMPBF | IC AMP/DRIVER DIFF GBW 10-QFN |
| AD8331ARQZ-RL | IC VGA SINGLE W/PREAMP 20QSOP |
| AD8331ARQZ-R7 | IC AMP VAR GAIN 1CHAN 20QSOP |
| VE-21V-MW-B1 | CONVERTER MOD DC/DC 5.8V 100W |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LTC6404IUD-1#PBF | 功能描述:IC AMP/DRIVER DIFF 16-QFN RoHS:是 類別:集成電路 (IC) >> 線性 - 放大器 - 專用 系列:- 產(chǎn)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 |
| LTC6404IUD-1#TRPBF | 功能描述:IC AMP/DRIVER DIFF 16-QFN RoHS:是 類別:集成電路 (IC) >> 線性 - 放大器 - 專用 系列:- 產(chǎn)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 |
| LTC6404IUD-1-PBF | 制造商:LINER 制造商全稱:Linear Technology 功能描述:600MHz, Low Noise, High Precision Fully Differential Input/Output Amplifi er/Driver |
| LTC6404IUD-1-TRPBF | 制造商:LINER 制造商全稱:Linear Technology 功能描述:600MHz, Low Noise, High Precision Fully Differential Input/Output Amplifi er/Driver |
| LTC6404IUD-2#PBF | 功能描述:IC AMP/DRIVER DIFF 16-QFN RoHS:是 類別:集成電路 (IC) >> 線性 - 放大器 - 專用 系列:- 產(chǎn)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 |
發(fā)布緊急采購，3分鐘左右您將得到回復。