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參數(shù)資料
| 型號： | LTC6403CUD-1#TRPBF |
| 廠商： | Linear Technology |
| 文件頁數(shù)： | 3/20頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC AMP/DRIVER LN LP 16-QFN |
| 標(biāo)準(zhǔn)包裝： | 2,500 |
| 類型： | ADC 驅(qū)動器 |
| 應(yīng)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(yīng)商設(shè)備封裝： | 16-QFN-EP（3x3） |
| 包裝： | 帶卷 (TR) |
LTC6403-1
11
64031fa
APPLICATIONS INFORMATION
Functional Description
The LTC6403-1 is a small outline, wide band, low noise,
and low distortion fully-differential amplier with accurate
output phase balancing. The LTC6403-1 is optimized to
drive low voltage, single-supply, differential input analog-
to-digital converters (ADCs). The LTC6403-1’s output is
capable of swinging rail-to-rail on supplies as low as 2.7V,
which makes the amplier ideal for converting ground
referenced, single-ended signals into VOCM referenced
differential signals in preparation for driving low voltage,
single-supply, differential input ADCs. Unlike traditional
op amps which have a single output, the LTC6403-1 has
two outputs to process signals differentially. This allows
for two times the signal swing in low voltage systems
when compared to single-ended output ampliers. The
balanced differential nature of the amplier also provides
even-order harmonic distortion cancellation, and less
susceptibility to common mode noise (like power supply
noise). The LTC6403-1 can be used as a single ended input
to differential output amplier, or as a differential input to
differential output amplier.
The LTC6403-1’s output common mode voltage, dened
as the average of the two output voltages, is independent
of the input common mode voltage, and is adjusted by
applying a voltage on the VOCM pin. If the pin is left open,
an internal resistive voltage divider develops a potential
halfway between the V+ and V– pin voltages. Whenever
VOCM is not hard tied to a low impedance ground plane, it
is recommended that a high quality ceramic capacitor is
used to bypass the VOCM pin to a low impedance ground
plane (See Layout Considerations in this document). The
LTC6403-1’s internal common mode feedback path forces
accurate output phase balancing to reduce even order
harmonics, and centers each individual output about the
potential set by the VOCM pin.
VV
OUTCM
OCM
OUT
==
+
–
2
The outputs (+OUT and –OUT) of the LTC6403-1 are ca-
pable of swinging rail-to-rail. They can source or sink up
to approximately 60mA of current.
Additional outputs (+OUTF and –OUTF) are available that
provide ltered versions of the +OUT and –OUT outputs. An
on-chip single pole RC passive lter bandlimits the ltered
outputs to a –3dB frequency of 44.2MHz. The user has a
choice of using the unltered outputs, the ltered outputs,
or modifying the ltered outputs to adjust the frequency
response by adding additional components (see Output
Filter Considerations and Use section).
In applications where the full bandwidth of the LTC6403-1
is desired, the unltered outputs (+OUT and –OUT) should
be used. The unltered outputs +OUT and –OUT are
designed to drive 10pF to ground (or 5pF differentially).
Capacitances greater than 10pF will produce excess
peaking, which can be mitigated by placing at least 25
Ω
in series with the output.
Input Pin Protection
The LTC6403-1’s input stage is protected against differen-
tial input voltages that exceed 1.4V by two pairs of back
to back diodes connected in anti-parallel series between
+IN and –IN (Pins 6 and 15). In addition, the input pins
have steering diodes to either power supply. If the input
pair is over-driven, the current should be limited to under
10mA to prevent damage to the IC. The LTC6403-1 also
has steering diodes to either power supply on the VOCM,
and SHDN pins (Pins 4 and 1), and if exposed to voltages
which exceed either supply, they too, should be current
limited to under 10mA.
SHDN Pin
If the SHDN pin (Pin 1), is pulled 2.1V below the positive
supply, the LTC6403-1 will power down. The pin has the
Thevenin equivalent impedance of approximately 66k to V+.
If the pin is left unconnected, an internal pull-up resistor
of 150k will keep the part in normal active operation. Care
should be taken to control leakage currents at this pin to
under 1μA to prevent inadvertently putting the LTC6403-1
into shutdown. In shutdown, all biasing current sources
are shut off, and the output pins, +OUT and –OUT, will each
appear as an open collector with a non-linear capacitor in
parallel and steering diodes to either supply. Because of
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| LTC6403IUD-1#PBF | 功能描述:IC AMP/DRIVER LN LP 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 |
| LTC6403IUD-1#TRPBF | 功能描述:IC AMP/DRIVER LN LP 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 |
| LTC6403IUD-1-PBF | 制造商:LINER 制造商全稱:Linear Technology 功能描述:200MHz, Low Noise, Low Power Fully Differential Input/Output Amplifi er/Driver |
| LTC6403IUD-1-TRPBF | 制造商:LINER 制造商全稱:Linear Technology 功能描述:200MHz, Low Noise, Low Power Fully Differential Input/Output Amplifi er/Driver |
| LTC6404 | 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 |
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