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參數(shù)資料
| 型號： | LT1204CSW#PBF |
| 廠商： | Linear Technology |
| 文件頁數(shù)： | 3/20頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC VIDEOMUX CFA 75MHZ 4IN 16SOIC |
| 標(biāo)準(zhǔn)包裝： | 47 |
| 應(yīng)用： | 4:1 多路復(fù)用器-放大器 |
| 電路數(shù)： | 1 |
| -3db帶寬： | 75MHz |
| 轉(zhuǎn)換速率： | 1000 V/µs |
| 電流 - 電源： | 19mA |
| 電流 - 輸出 / 通道： | 125mA |
| 電壓 - 電源，單路/雙路(±)： | 10 V ~ 30 V，±5 V ~ 15 V |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 16-SOIC（0.295"，7.50mm 寬） |
| 供應(yīng)商設(shè)備封裝： | 16-SOIC |
| 包裝： | 管件 |
| 產(chǎn)品目錄頁面： | 1356 (CN2011-ZH PDF) |
11
LT1204
U
S
A
O
PPLICATI
WU
U
I FOR ATIO
monitors. The reference pin has no effect when the LT1204
is operating on
±5V, and should be grounded. On supply
voltages above
±8V, the range of voltages for Pin 8 should
be between – 6.5V and – 7.5V. Reducing Pin 8 voltage
below – 7.5V turns “on” the “off” tee switch, and the
isolation between channels is lost.
1204 AI04
Channel-to-Channel Switching
VOUT PIN 15
Transient at Input Buffer
VIN0 AND VIN1 CONNECTED TO 2MHz SINEWAVE
Competitive MUXs
Crosstalk
The crosstalk, or more accurately all hostile crosstalk, is
measured by driving a signal into any three of the four
inputs and selecting the 4th input with the logic control.
This 4th input is either shorted to ground or terminated in
an impedance. All hostile crosstalk is defined as the ratio
in decibel of the signal at the output of the CFA to the signal
on the three driven inputs, and is input-referred. Disable
crosstalk is measured with all four inputs driven and the
part disabled. Crosstalk is critical in many applications
where video multiplexers are used. In professional video
systems, a crosstalk figure of – 72dB is a desirable
specification.
The key to the outstanding crosstalk performance of the
LT1204 is the use of tee switches (see Figure 1). When the
tee switch is on (Q2 off) Q1 and Q3 are a pair of emitter
followers with excellent AC response for driving the CFA.
A0 PIN 9
VIN0 AND VIN1 CONNECTED TO 2MHz SINEWAVE
PIN 8 VOLTAGE = –6.8V, VS = ±15V
A0 PIN 9
VIN0 PIN 1
1204AI05
SWITCHING BETWEEN VIN0 AND VIN1
RS = 50, VREF = –6.8V, VS ±15V
Competitive video multiplexers built in CMOS are bidirec-
tional and suffer from poor output-to-input isolation and
cause transients to feed to the inputs. CMOS MUXs have
been built with “break-before-make” switches to eliminate
the talking between channels, but these suffer from output
glitches large enough to interfere with sync circuitry.
Multiplexers built on older bipolar processes that switch
lateral PNP transistors take several microseconds to settle
and blur the transition between pictures.
BIPOLAR
MUX
CMOS MUX
1204 AI06
–
+
CFA
RF
VOUT
FB
I2
RG
VIN0
TO LOGIC
Q2
Q1
I1
Q3
1204 F01
V+
V –
–V
Figure 1. Tee Switch
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LT1205 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:150MHz Video Multiplexers |
| LT1205CS | 制造商:Linear Technology 功能描述:Analog Multiplexer/Amp Dual 2:1 16-Pin SOIC N |
| LT1205CS#PBF | 功能描述:IC VIDEO MULTIPLEXER SPDT 16SOIC RoHS:是 類別:集成電路 (IC) >> 接口 - 模擬開關(guān)，多路復(fù)用器，多路分解器 系列:- 標(biāo)準(zhǔn)包裝:1,000 系列:- 功能:多路復(fù)用器 電路:1 x 4:1 導(dǎo)通狀態(tài)電阻:- 電壓電源:雙電源 電壓 - 電源，單路/雙路(±):±5V 電流 - 電源:7mA 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:16-SOIC（0.154"，3.90mm 寬） 供應(yīng)商設(shè)備封裝:16-SOIC 包裝:帶卷 (TR) |
| LT1205CS#TR | 功能描述:IC VIDEO MULTIPLEXER SPDT 16SOIC RoHS:否 類別:集成電路 (IC) >> 接口 - 模擬開關(guān)，多路復(fù)用器，多路分解器 系列:- 標(biāo)準(zhǔn)包裝:1,000 系列:- 功能:多路復(fù)用器 電路:1 x 4:1 導(dǎo)通狀態(tài)電阻:- 電壓電源:雙電源 電壓 - 電源，單路/雙路(±):±5V 電流 - 電源:7mA 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:16-SOIC（0.154"，3.90mm 寬） 供應(yīng)商設(shè)備封裝:16-SOIC 包裝:帶卷 (TR) |
| LT1205CS#TRPBF | 功能描述:IC VIDEO MULTIPLEXER SPDT 16SOIC RoHS:是 類別:集成電路 (IC) >> 接口 - 模擬開關(guān)，多路復(fù)用器，多路分解器 系列:- 標(biāo)準(zhǔn)包裝:1,000 系列:- 功能:多路復(fù)用器 電路:1 x 4:1 導(dǎo)通狀態(tài)電阻:- 電壓電源:雙電源 電壓 - 電源，單路/雙路(±):±5V 電流 - 電源:7mA 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:16-SOIC（0.154"，3.90mm 寬） 供應(yīng)商設(shè)備封裝:16-SOIC 包裝:帶卷 (TR) |
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