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參數(shù)資料
| 型號： | MAX499CWG |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | 運(yùn)動(dòng)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)： | 12/16頁 |
| 文件大?。?/td> | 155K |
| 代理商： | MAX499CWG |
M
Quad/Triple, S PDT, RGB S witc hes
with 250MHz Video Buffer Amplifiers
12
______________________________________________________________________________________
S witc hing Audio S ignals
(Audio-Distortion Measurement)
When switching audio signals, distortion is the prime
consideration in performance. Figure 6 shows total
harmonic distortion vs. frequency, in the audio range,
for the MAX498/MAX499.
Large S witc h Arrays
Large crosspoint switch arrays are possible with the
MAX498/MAX499 using the enable function
EN
. When
the amplifiers are disabled, output impedance is typi-
cally 1.2k
,
due to the feedback and gain resistors.
This limits the number of outputs that can be paralleled
without a buffer. Since each output can drive 100
,
eight outputs can typically be connected together. If
additional outputs must be connected in parallel, a
MAX4178 (single), MAX496 (quad), or equivalent unity-
gain buffer can be used.
Whether enabled or disabled, each input represents
more than 200k
of resistance. Capacitance is the
prime consideration limiting the number of inputs that
can be connected to a single output. Since each output
can drive 100pF of capacitance without an isolation
resistor, 50 inputs (C
IN
= 2pF, typical) can be driven
by a single output. However, peaking will occur as
inputs are added (Figure 3), which reduces the 0.1dB
bandwidth.
Digital Interfac e
The MAX498/MAX499 multiplexer architecture ensures
that no input channels are ever connected together.
Select a channel by changing A0’s state (A0 = 0 for
channel A, and A0 = 1 for channel B) and pulsing
CS
low
(see Tables 1a and 1b). Figure 7 shows the logic timing
diagram.
When the enable input (E—–) is driven to a TTL low state, it
enables the MAX498/MAX499 amplifier outputs. When E—–
is driven high, it disables the amplifier outputs. When
disabled, the MAX498/MAX499 exhibit a 1.2k
dis-
abled output resistance due to their internal feedback
resistors.
LE determines whether E—–is latched by
CS
or operates
independently. W becomes the latch control for the E—–
nected to V+,
CS
input register. If
CS
is low, both the E—–and A0 latches
are transparent; once
CS
returns high, both A0 and E—–
are latched.
When LE is connected to ground, the E—–latch is trans-
parent and independent of
CS
. This allows all
MAX498/MAX499 devices to be shut down simultane-
CS’
s input state. Simply connect
ously, regardless of
(Figure 8a). Hard wire LE to V+ or ground (rather than
driving LE with a gate) to prevent crosstalk from the
digital inputs to IN0A.
Figure 6. Total Harmonic Distortion (Audio) vs. Frequency
10
-82
-84
-86
-88
-90
-92
-94
-96
-98
100
10k
MAX186/MAX188
FULL POWER-DOWN
FREQUENCY (Hz)
D
1k
2
47
COMPARATOR INPUT BIAS CURRENT
vs. SUPPLY VOLTAGE
CAPACITANCE (pF)
I
)
3
4
5
6
7
8
100
150
200
270
390
510
Figure 5. Isolation Resistor vs. Capacitive Load
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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(shí)間（最大值）: 關(guān)閉時(shí)間（最大值）: 傳播延遲時(shí)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(shí)間: 開啟時(shí)間（最大值）: 關(guān)閉時(shí)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(shí)間: 開啟時(shí)間（最大值）: 關(guān)閉時(shí)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(xiǎn)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(xiǎn)絲類型:Fast Acting 保險(xiǎn)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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