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參數(shù)資料
| 型號： | LT6553 |
| 廠商： | Linear Technology Corporation |
| 元件分類： | 運動控制電子 |
| 英文描述： | 650MHz Gain of 2 Triple Video Amplifier |
| 中文描述： | 650MHz的增益2三路視頻放大器 |
| 文件頁數(shù)： | 5/8頁 |
| 文件大?。?/td> | 168K |
| 代理商： | LT6553 |
LT6553
5
6553i
Power Supplies
The LT6553 is optimized for
±
5V supplies but can be
operated on as little as
±
2.25V or a single 4.5V supply and
as much as
±
6V or a single 12V supply. Internally, each
supply is independent to improve channel isolation. Do
not leave any supply pins disconnected or the part may not
function correctly!
Enable/Shutdown
The LT6553 has a TTL compatible shutdown mode con-
trolled by the EN pin and referenced to the DGND pin. If the
amplifier will be enabled at all times, the EN pin can be
connected directly to DGND. If the enable function is
desired, either driving the pin above 2V or allowing the
internal 46k pull-up resistor to pull the EN pin to the top rail
will disable the amplifier. When disabled, the DC output
impedance will rise to approximately 700
through the
internal feedback and gain resistors. Supply current into
the amplifier in the disabled state will be primarily through
V
+
and approximately equal to (V
+
– EN)/46k.
It is important that the two following constraints on the
DGND pin and the EN pin are always followed:
V
+
– V
DGND
≥
3V
V
EN
– V
DGND
≤
5.5V
Split supplies of
±
3V to
±
5.5V will satisfy these require-
ments with DGND connected to 0V.
In single supply applications above 5.5V, an additional
resistor may be needed from the EN pin to DGND if the pin
is ever allowed to float. For example, on a 12V single
supply, a 33k resistor would protect the pin if it were
allowed to float high while still allowing the internal pull-
up resistor to disable the part.
On dual
±
2.25V supplies, connecting the EN and DGND
pins to V
–
is the easiest way of ensuring that V
+
– V
DGND
is more than 3V.
The DGND pin should not be pulled above the EN pin since
doing so will turn on an ESD protection diode. If the EN pin
voltage is forced a diode drop below the DGND pin, current
should be limited to 10mA or less.
The enable/disable times of the LT6553 are fast when
driven with a logic input. Turn on (from 50% EN input to
50% output) typically occurs in less than 50ns. Turn off is
slower, but is nonetheless below 300ns.
Input Considerations
The LT6553 input voltage range is from V
–
+ 1V to V
+
– 1V.
Therefore, on split supplies the LT6553 input range is
always larger than the output swing. On a single positive
supply, however, the input range limits the output low
swing to 2V (1V multiplied by the internal gain of 2).
The inputs can be driven beyond the point at which the
output clips so long as input currents are limited to below
±
10mA. Continuing to drive the input beyond the output
limit can result in increased current drive and slightly
increased swing, but will also increase supply current and
may result in delays in transient response at larger levels
of overdrive.
Layout and Grounding
It is imperative that care is taken in PCB layout in order to
utilize the very high speed and very low crosstalk of the
LT6553. Separate power and ground planes are highly
recommended and trace lengths should be kept as short
as possible. If input or output traces must be run over a
distance of several centimeters, they should use a con-
trolled impedance with matching series and shunt resis-
tances (nominally 75
) to maintain signal fidelity.
Low ESL/ESR bypass capacitors should be placed as close
to the positive and negative supply pins as possible. One
0.01
μ
F ceramic capacitor is recommended for both V
+
and
V
–
. Additional 470pF ceramic capacitors with minimal
trace length on each supply pin will further improve AC and
transient response as well as channel isolation. For high
current drive and large-signal transient applications, addi-
tional 1
μ
F to 10
μ
F tantalums should be added. The small-
est capacitors should be placed closest to the package.
To maintain the LT6553’s channel isolation, it is beneficial
to shield parallel input and output traces using a ground
plane or power supply traces. Vias between topside and
backside metal may be required to maintain a low induc-
tance ground near the part where numerous traces con-
verge.
ESD Protection
The LT6553 has reverse-biased ESD protection diodes on
all relevant pins. If any pins are forced a diode drop above
the positive supply or a diode drop below the negative
supply, large currents may flow through these diodes. If
the current is kept below 10mA, no damage to the devices
will occur.
APPLICATIU
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LT6553_09 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:650MHz Gain of 2 Triple Video Amplifier |
| LT6553CGN | 功能描述:IC AMP VIDEO TRIPLE GAIN2 16SSOP RoHS:否 類別:集成電路 (IC) >> 線性 - 放大器 - 視頻放大器和頻緩沖器 系列:- 標(biāo)準(zhǔn)包裝:1,000 系列:- 應(yīng)用:驅(qū)動器 輸出類型:差分 電路數(shù):3 -3db帶寬:350MHz 轉(zhuǎn)換速率:1000 V/µs 電流 - 電源:14.5mA 電流 - 輸出 / 通道:60mA 電壓 - 電源，單路/雙路(±):5 V ~ 12 V，±2.5 V ~ 6 V 安裝類型:表面貼裝 封裝/外殼:20-VFQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:20-QFN 裸露焊盤（4x4） 包裝:帶卷 (TR) |
| LT6553CGN#PBF | 功能描述:IC AMP TRPL VIDEO GAIN2 16-SSOP RoHS:是 類別:集成電路 (IC) >> 線性 - 放大器 - 視頻放大器和頻緩沖器 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:50 系列:- 應(yīng)用:TFT-LCD 面板：VCOM 驅(qū)動器 輸出類型:滿擺幅 電路數(shù):1 -3db帶寬:35MHz 轉(zhuǎn)換速率:40 V/µs 電流 - 電源:3.7mA 電流 - 輸出 / 通道:1.3A 電壓 - 電源，單路/雙路(±):9 V ~ 20 V，±4.5 V ~ 10 V 安裝類型:表面貼裝 封裝/外殼:8-TSSOP，8-MSOP（0.118"，3.00mm 寬）裸露焊盤 供應(yīng)商設(shè)備封裝:8-uMax-EP 包裝:管件 |
| LT6553CGN#TR | 功能描述:IC AMP VIDEO TRIPLE GAIN2 16SSOP RoHS:否 類別:集成電路 (IC) >> 線性 - 放大器 - 視頻放大器和頻緩沖器 系列:- 標(biāo)準(zhǔn)包裝:1,000 系列:- 應(yīng)用:驅(qū)動器 輸出類型:差分 電路數(shù):3 -3db帶寬:350MHz 轉(zhuǎn)換速率:1000 V/µs 電流 - 電源:14.5mA 電流 - 輸出 / 通道:60mA 電壓 - 電源，單路/雙路(±):5 V ~ 12 V，±2.5 V ~ 6 V 安裝類型:表面貼裝 封裝/外殼:20-VFQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:20-QFN 裸露焊盤（4x4） 包裝:帶卷 (TR) |
| LT6553CGN#TRPBF | 功能描述:IC AMP VIDEO TRIPLE GAIN2 16SSOP RoHS:是 類別:集成電路 (IC) >> 線性 - 放大器 - 視頻放大器和頻緩沖器 系列:- 標(biāo)準(zhǔn)包裝:1,000 系列:- 應(yīng)用:驅(qū)動器 輸出類型:差分 電路數(shù):3 -3db帶寬:350MHz 轉(zhuǎn)換速率:1000 V/µs 電流 - 電源:14.5mA 電流 - 輸出 / 通道:60mA 電壓 - 電源，單路/雙路(±):5 V ~ 12 V，±2.5 V ~ 6 V 安裝類型:表面貼裝 封裝/外殼:20-VFQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:20-QFN 裸露焊盤（4x4） 包裝:帶卷 (TR) |
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