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參數資料
| 型號： | ISL54207EVAL1Z |
| 廠商： | Intersil |
| 文件頁數： | 13/14頁 |
| 文件大?。?/td> | 0K |
| 描述： | EVALUATION BOARD FOR ISL54207 |
| 標準包裝： | 1 |
| 主要目的： | 接口，模擬和數字式開關 |
| 嵌入式： | 否 |
| 已用 IC / 零件： | ISL54207 |
| 主要屬性： | 2 x SPDT 音頻，USB 和視頻開關 |
| 次要屬性： | 2.7 V ~ 3.6 V 電源 |
| 已供物品： | 板 |
8
FN6403.0
December 5, 2006
Application Block Diagram
Detailed Description
The ISL54207 device is a dual single pole/double throw
(SPDT) analog switch device that operates from a single DC
power supply in the range of 2.7V to 3.6V. It was designed to
function as a dual 2 to 1 multiplexer to select between USB
differential data signals and mono audio/composite video
baseband signals (CVBS). It comes in tiny μTQFN and
TDFN packages for use in cameras, camcorders, video MP3
players, PDAs, cell phones, and other personal media
players.
The part consists of two 3
Ω audio/video switches and two
5
Ω USB switches. The audio/video switches can accept
signals that swing below ground. They were designed to
pass ground reference audio or dc restored with synch
composite video signals with minimal distortion. The USB
switches were designed to pass high-speed USB differential
data signals with minimal edge and phase distortion.
The ISL54207 was specifically designed for digital cameras,
camcorders, MP3 players, cell phones and other personal
media player applications that need to combine the
audio/video jacks and the USB data connector into a single
shared connector, thereby saving space and component
cost. A typical application block diagram of this functionality
is shown above.
The ISL54207 incorporates circuitry for the detection of the
USB VBUS voltage, which is used to switch between the
audio/video drivers and USB transceiver of the media player.
The ISL54207 contains a logic control pin (CTRL) that when
driven Low while VBUS is Low, opens all switches and puts
the part into a low power state, drawing typically 1nA of IDD
current.
A detailed description of the two types of switches is
provided in the following sections. The USB transmission
and audio/video playback are intended to be mutually
exclusive operations.
NC1 and NC2 Audio/Video Switches
The two NC (normally closed) audio/video switches (NC1,
NC2) are 3
Ω switches that can pass signals that swing
below ground by as much as 1.5V. They were designed to
pass ground reference audio signals and DC restored
composite base-band signals (CVBS), including negative
synchronizing pulse with minimal insertion loss and very low
distortion and degradation.
The -3dB bandwidth into 75
Ω is 338MHz (Figure 17).
Crosstalk between NC1 and NC2 @ 4MHz is -78dB
(Figure 16), which allows composite video to be routed
through one switch and mono-audio through the other switch
with little interference.
The recommended maximum signal range is from -1.5V to
1.5V. You can apply positive signals greater than 1.5V but
the rON resistance of the switch increases rapidly above
1.5V. The signal should not be allowed to exceed the VDD
rail or swing more negative than -1.5V.
Over a signal range of ±1V (0.707Vrms) with VDD > 2.7V,
these switches have an extremely low rON resistance
variation. They can pass a ground referenced audio signal
with very low distortion (<0.06% THD+N) when delivering
15.6mW into a 32
Ω headphone speaker load. See
NTSC color bar signal at both the input (Figure 8) and output
(Figure 9) of the ISL54207. The plots show that except for a
little attenuation due to switch rON and test fixture cabling,
there is virtually no degradation of the video waveform
through the switch.
ISL54207
USB
TRANSCEIVER
HIGH-SPEED
AUDIO
USB
AND
AUDIO/V
IDE
O
JACK
COM1
COM2
VBUS
GND
NO1
NO2
NC1
NC2
VDD
CTRL
LOGIC CIRCUITRY
mCONTROLLER
22k
Ω
4M
Ω
4M
Ω
50k
Ω
50k
Ω
NTSC or PAL
VIDEO
D+
D-
ISL54207
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相關代理商/技術參數 |
參數描述 |
|---|---|
| ISL54207IRUZ-T | 功能描述:IC SWITCH USB/CVBS/AUDIO 10-TQFN RoHS:是 類別:集成電路 (IC) >> 接口 - 模擬開關，多路復用器，多路分解器 系列:- 產品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:36 系列:- 功能:多路復用器 電路:2 x 4:1 導通狀態(tài)電阻:75 歐姆 電壓電源:單/雙電源 電壓 - 電源，單路/雙路(±):2 V ~ 12 V，±2 V ~ 6 V 電流 - 電源:- 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:20-SOIC（0.295"，7.50mm 寬） 供應商設備封裝:20-SOIC W 包裝:管件 |
| ISL54207IRZ | 功能描述:IC SWITCH USB/CVBS/AUDIO 10-TDFN RoHS:是 類別:集成電路 (IC) >> 接口 - 模擬開關，多路復用器，多路分解器 系列:- 產品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:36 系列:- 功能:多路復用器 電路:2 x 4:1 導通狀態(tài)電阻:75 歐姆 電壓電源:單/雙電源 電壓 - 電源，單路/雙路(±):2 V ~ 12 V，±2 V ~ 6 V 電流 - 電源:- 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:20-SOIC（0.295"，7.50mm 寬） 供應商設備封裝:20-SOIC W 包裝:管件 |
| ISL54207IRZ-T | 功能描述:IC SWITCH USB/CVBS/AUDIO 10-TDFN RoHS:是 類別:集成電路 (IC) >> 接口 - 模擬開關，多路復用器，多路分解器 系列:- 產品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:36 系列:- 功能:多路復用器 電路:2 x 4:1 導通狀態(tài)電阻:75 歐姆 電壓電源:單/雙電源 電壓 - 電源，單路/雙路(±):2 V ~ 12 V，±2 V ~ 6 V 電流 - 電源:- 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:20-SOIC（0.295"，7.50mm 寬） 供應商設備封裝:20-SOIC W 包裝:管件 |
| ISL54208 | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:Low Voltage, Dual SPDT, USB/CVBS/ Audio Switches, with Negative Signal Capability |
| ISL54208EVAL1Z | 功能描述:EVALUATION BOARD FOR ISL54208 RoHS:是 類別:編程器，開發(fā)系統(tǒng) >> 評估演示板和套件 系列:- 標準包裝:1 系列:PCI Express® (PCIe) 主要目的:接口，收發(fā)器，PCI Express 嵌入式:- 已用 IC / 零件:DS80PCI800 主要屬性:- 次要屬性:- 已供物品:板 |
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