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參數(shù)資料
| 型號： | LTC6405CMS8E#PBF |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 模擬信號調(diào)理 |
| 英文描述： | SPECIALTY ANALOG CIRCUIT, PDSO8 |
| 封裝： | LEAD FREE, PLASTIC, MSOP-8 |
| 文件頁數(shù)： | 14/24頁 |
| 文件大?。?/td> | 281K |
| 代理商： | LTC6405CMS8E#PBF |
LTC6405
21
6405fa
Interfacing the LTC6405 to A/D Converters
Rail-to-rail input and fast settling time make the LTC6405
ideal for interfacing to low voltage, single supply, differ-
ential input ADCs. The sampling process of ADCs create
a sampling glitch caused by switching in the sampling
capacitor on the ADC front end which momentarily “shorts”
the output of the amplier as charge is transferred between
the amplier and the sampling capacitor. The amplier
must recover and settle from this load transient before
this acquisition period ends for a valid representation of
the input signal. In general, the LTC6405 will settle much
more quickly from these periodic load impulses than from
a 2V input step, but it is a good idea to place an R-C lter
network between the differential outputs of the LTC6405
and the input of the ADC to help absorb the charge injection
that comes out of the ADC from the sampling process.
The capacitance of the lter network serves as a charge
reservoir to provide high frequency charging during the
sampling process, while the resistors of the lter network
are used to dampen and attenuate any charge kickback
from the ADC. The selection of the R-C time constant is
trial and error for a given ADC, but the following guidelines
are recommended: Choosing too large of a resistor in the
decoupling network leaving insufcient settling time will
create a voltage divider between the dynamic input imped-
ance of the ADC and the decoupling resistors. Choosing
too small of a resistor will possibly prevent the resistor
from properly dampening the load transient caused by
the sampling process, prolonging the time required for
settling. In 16-bit applications, this will typically require
a minimum of 11 R-C time constants. It is recommended
that the capacitor chosen have a high quality dielectric
(such as C0G multilayer ceramic).
APPLICATIONS INFORMATION
Figure 12. Interfacing the LTC6405 to an ADC
0.1μF
–
+
1
SHDN
5
6
–IN
7
+OUT
8
+OUTF
16
15
+IN
NC
14
–OUT
13
–OUTF
+INA
–INA
200Ω
2
V+
3
V–
V+
V–
5V
VOCM
12
V–
11
V+
10
V+
9
V–
6405 F12
LTC6405
LTC2208
VIN, 2VP-P
SHDN
200Ω
100Ω
200Ω
0.1μF
20Ω
5V
4
0.1μF
CONTROL
GND VDD
VCM
D15
D0
0.1μF
4.7pF
3.3V
1μF
VTIP
1.8pF
1.25pF
50Ω
2.2μF
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LTC6405CMS8E-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 |
| LTC6405CUD | 制造商:Linear Technology 功能描述:DIFF AMP 5V 2.7GHZ R/R 16QFN 制造商:Linear Technology 功能描述:DIFF AMP, 5V, 2.7GHZ, R/R, 16QFN |
| LTC6405CUD#PBF | 功能描述:IC DIFF AMP/DRIVER R-R 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(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:60 系列:- 類型:可變增益放大器 應(yīng)用:CATV 安裝類型:表面貼裝 封裝/外殼:20-WQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:20-TQFN-EP（5x5） 包裝:托盤 |
| LTC6405CUD#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 |
| LTC6405CUD#TRPBF | 功能描述:IC DIFF AMP/DRIVER R-R 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(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:60 系列:- 類型:可變增益放大器 應(yīng)用:CATV 安裝類型:表面貼裝 封裝/外殼:20-WQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:20-TQFN-EP（5x5） 包裝:托盤 |
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