參數資料
| 型號： | LT6554CGN#TR |
| 廠商： | Linear Technology |
| 文件頁數： | 2/12頁 |
| 文件大小： | 0K |
| 描述： | IC BUFFER VID TRPL 650MHZ 16SSOP |
| 標準包裝： | 2,500 |
| 應用： | 緩沖器 |
| 電路數： | 3 |
| -3db帶寬： | 650MHz |
| 轉換速率： | 2500 V/µs |
| 電流 - 電源： | 8mA |
| 電流 - 輸出 / 通道： | 70mA |
| 電壓 - 電源，單路/雙路(±)： | 4.5 V ~ 12 V，±2.25 V ~ 6 V |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 16-SSOP（0.154"，3.90mm 寬） |
| 供應商設備封裝： | 16-SSOP |
| 包裝： | 帶卷 (TR) |
LT6554
10
6554fa
TYPICAL APPLICATIO
U
RGB Buffer Demo Board
The DC794 Demo Board illustrates optimal routing,
bypassing and termination using the LT6554 as an
RGB video buffer. The schematic is shown in Figure 4. All
inputs and outputs are routed to have a characteristic
impedance of 75. The 75 input shunt and output series
terminations are connected as close to the part as pos-
sible. While the 75 back termination resistors at the
outputs of the LT6554 minimize signal reflections in the
output traces and isolate the part from any capacitive
loading in those traces, they also contribute to gain error
if the output is not terminated with high impedance. For
example, if the output is terminated with a 1k load, the 75
back termination will cause a 7% gain error. Decreasing
the value of the back termination resistors will decrease
the signal attenuation but may compromise the AC re-
sponse. However, connecting the LT6554 outputs to the
output traces on the DC794 board without some series
resistance is not recommended; 10 to 20 is generally
sufficient.
A fourth signal trace is provided at the bottom of the
DC794 demo board with dimensions identical to the
combined input and output of the other channels. This
trace can be used for calibrating the effects of electrical
delay and impedance mismatching and is not necessary
in an end-user application. Jumpers and additional con-
nectors are also included to allow for evaluation of the
enable feature and single supply operation.
RGB Video Selector/Cable Driver
A video multiplexer can be implemented using the EN pins
of parallel LT6554s as shown in Figure 5. In this applica-
tion, the corresponding outputs are connected together
and one LT6554 is switched on while the other is switched
off. A fast inverter provides a complementary signal to
ensure that only one set of R, G and B channels is buffered
at any time.
Since the output impedance of a disabled LT6554 is very
high, adding additional channels will not resistively load
an enabled output. However, since the disabled LT6554
has around 6pF of capacitance, it may be desirable to
resistively isolate the outputs of each channel to maintain
flat frequency response as shown in the graph labeled
“Maximum Capacitive Load vs Output Series Resistor” in
the Typical Performance Characteristics section.
Figure 4. DC794 Demo Board Schematic
V–
J4
BANANA JACK
10
11
12
13
14
15
16
R6
75
R5
75
R4
75
R1
75
R2
75
R3
75
Z = 75
C1
4700pF
9
INB
AGND
ING
AGND
INR
DGND
EN
V–
V+
8
7
6
5
4
3
2
1
V–
OUTB
V+
OUTG
V–
OUTR
V+
LT6554
6554 F04
C2
470pF
C3
4700pF
C4
10F, 16V
1210
J2
BANANA
JACK
J9
5
1
OUTR
4
3
2
C5
470pF
DUAL
SINGLE
C6
1000pF
C7
470pF
C8
4700pF
C9
10F, 16V
1210
J10
5
J12
BNC
BNC x3
5
1
CAL
4
3
2
1
OUTG
4
3
2
J11
5
1
OUTB
4
3
2
J8
BNC
5
1
J3
BANANA
JACK
E3
AGND
E1
EN
E2
DGND
CAL
AGND
4
3
2
13
2
JP3
SUPPLY
ENABLE
EXT
3
1 2
JP1
CONTROL
J5
5
1
INR
4
3
2
J6
5
BNC × 3
1
ING
4
3
2
J7
5
1
Z = 75
INB
4
3
2
AGND
FLOAT
3
1 2
JP2
DGND
J1
50 BNC
EN
5432
1
ALL BNC: CANARE BCJ-BPLH
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| LT6554IGN | 功能描述:IC BUFFER VID TRPL 650MHZ 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:- 標準包裝:1,000 系列:- 應用:驅動器 輸出類型:差分 電路數:3 -3db帶寬:350MHz 轉換速率: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 供應商設備封裝:20-QFN 裸露焊盤（4x4） 包裝:帶卷 (TR) |
| LT6554IGN#PBF | 功能描述:IC BUFFER VID TRPL 650MHZ 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:- 標準包裝:1,000 系列:- 應用:驅動器 輸出類型:差分 電路數:3 -3db帶寬:350MHz 轉換速率: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 供應商設備封裝:20-QFN 裸露焊盤（4x4） 包裝:帶卷 (TR) |
| LT6554IGN#TR | 功能描述:IC BUFFER VID TRPL 650MHZ 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:- 標準包裝:1,000 系列:- 應用:驅動器 輸出類型:差分 電路數:3 -3db帶寬:350MHz 轉換速率: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 供應商設備封裝:20-QFN 裸露焊盤（4x4） 包裝:帶卷 (TR) |
| LT6554IGN#TRPBF | 功能描述:IC BUFFER VID TRPL 650MHZ 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:- 標準包裝:1,000 系列:- 應用:驅動器 輸出類型:差分 電路數:3 -3db帶寬:350MHz 轉換速率: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 供應商設備封裝:20-QFN 裸露焊盤（4x4） 包裝:帶卷 (TR) |
| LT6555 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:650MHz Gain of 2 Triple 2:1Video Multiplexer |
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