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參數(shù)資料
| 型號： | MAX499CWG |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | 運動控制電子 |
| 英文描述： | Quad/Triple, SPDT, RGB Switches with 250MHz Video Buffer Amplifiers |
| 中文描述： | TRIPLE 1-CHANNEL, AUDIO/VIDEO SWITCH, PDSO24 |
| 封裝： | 0.300 INCH, SOP-24 |
| 文件頁數(shù)： | 13/16頁 |
| 文件大?。?/td> | 155K |
| 代理商： | MAX499CWG |
M
Quad/Triple, S PDT, RGB S witc hes
with 250MHz Video Buffer Amplifiers
______________________________________________________________________________________
13
Another option for output disable is to connect LE to V+,
parallel the outputs of several MAX498/MAX499s, and use
(Figure 8b).
When the outputs are disabled, off-isolation from the
analog inputs to the amplifier outputs is typically 81dB
at 10MHz.
Grounding and Layout
The MAX498/MAX499 bandwidths are in the RF fre-
quency range. Depending on the size of the PC board
used and the frequency of operation, it may be neces-
sary to use Micro-strip or Stripline techniques.
To realize the full AC performance of these high-speed
buffers, pay careful attention to power-supply bypassing
and board layout. The PC board should have at least two
layers (wire-wrap boards are too inductive, and bread
boards are too capacitive), with one side a signal layer
and the other a large, low-impedance ground plane. With
multilayer boards, locate the ground plane on the layer
that is not dedicated to a specific signal trace. The ground
plane should be as free from voids as possible. Connect
all ground pins to the ground plane.
Connect both positive power-supply pins together and
bypass with a 0.10μF ceramic capacitor at each power-
supply pin, as close to the device as possible. Repeat
for the negative power-supply pins. The capacitor lead
lengths should be as short as possible to minimize lead
inductance; surface-mount chip capacitors are ideal. A
large-value (10μF or greater) tantalum or electrolytic
bypass capacitor on each supply may be required for
high-current loads. The location of this capacitor is not
critical.
The MAX498/MAX499’s analog input pins are isolated
with ground pins to minimize parasitic coupling, which can
degrade crosstalk and/or amplifier stability. Keep signal
paths as short as possible to minimize inductance. Ensure
that all input channel traces are the same length, to main-
tain the phase relationship between the four channels. To
further reduce crosstalk, connect the coaxial-cable shield
to the ground side of the 75
terminating resistor at the
ground plane, and terminate all unused inputs to ground
and outputs with a 100
or 150
resistor to ground.
Enables amplifier outputs. Selects
channel B.
1
0
0
Disables amplifiers. Outputs high-Z.
A0 latch = channel A.
X
1
X
Enables amplifier outputs. Latches A0
to output A or B, according to A0’s
X
0
1
Enables amplifier outputs. Selects
channel A.
0
0
0
FUNCTION
A0
EN
CE
Latches A0,
EN
. Outputs unchanged.
Enables amplifier outputs. Selects
channel B.
Enables amplifier outputs. Selects
channel A.
X
X
1
Disables amplifiers. Outputs high-Z.
X
1
0
1
0
0
0
0
0
FUNCTION
A0
EN
CS
Table 1a. Amplifier and Channel
Selection with LE = V+
Table 1b. Amplifier and Channel
Selection with LE = GND
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX499CWG+ | 功能描述:多路器開關(guān) IC RoHS:否 制造商:Texas Instruments 通道數(shù)量:1 開關(guān)數(shù)量:4 開啟電阻（最大值）:7 Ohms 開啟時間（最大值）: 關(guān)閉時間（最大值）: 傳播延遲時間:0.25 ns 工作電源電壓:2.3 V to 3.6 V 工作電源電流: 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:UQFN-16 |
| MAX499CWG+T | 功能描述:視頻開關(guān) IC RoHS:否 制造商:Texas Instruments 開關(guān)數(shù)量:4 開啟電阻（最大值）:12 Ohms 傳播延遲時間: 開啟時間（最大值）: 關(guān)閉時間（最大值）: 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:WQFN-42 封裝:Reel |
| MAX499CWG-T | 功能描述:視頻開關(guān) IC RoHS:否 制造商:Texas Instruments 開關(guān)數(shù)量:4 開啟電阻（最大值）:12 Ohms 傳播延遲時間: 開啟時間（最大值）: 關(guān)閉時間（最大值）: 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:WQFN-42 封裝:Reel |
| MAX-50 | 功能描述:保險絲 MAXI FUSE RoHS:否 制造商:Littelfuse 產(chǎn)品:Surface Mount Fuses 電流額定值:0.5 A 電壓額定值:600 V 保險絲類型:Fast Acting 保險絲大小/組:Nano 尺寸:12.1 mm L x 4.5 mm W 安裝風(fēng)格: 端接類型:SMD/SMT 系列:485 |
| MAX500 | 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:CMOS, Quad, Serial-Interface 8-Bit DAC |
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