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參數(shù)資料
| 型號： | LT1187CS8 |
| 廠商： | Linear Technology |
| 文件頁數(shù)： | 2/16頁 |
| 文件大小： | 0K |
| 描述： | IC AMP VIDEO DIFFRNC ADJ 8-SOIC |
| 標準包裝： | 100 |
| 應用： | 差分 |
| 電路數(shù)： | 1 |
| -3db帶寬： | 50MHz |
| 轉(zhuǎn)換速率： | 165 V/µs |
| 電流 - 電源： | 13mA |
| 電流 - 輸出 / 通道： | 20mA |
| 電壓 - 電源，單路/雙路(±)： | 4.75 V ~ 16 V，±2.38 V ~ 8 V |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 8-SOIC（0.154"，3.90mm 寬） |
| 供應商設備封裝： | 8-SOIC |
| 包裝： | 管件 |
| 產(chǎn)品目錄頁面： | 1322 (CN2011-ZH PDF) |
LT1187
10
1187fa
LT1187 in Unity Gain
(A) STANDARD INPUTS, PINS 2 TO 3, VIN = 1.0VP-P
(B) EXTENDED INPUTS, PINS 2 TO 2, VIN = 1.0VP-P
(C) EXTENDED INPUTS, PINS 1 TO 2, VIN = 2.0VP-P
LT1187 AI06
APPLICATIONS INFORMATION
Using the Shutdown Feature
The LT1187 has a unique feature that allows the amplier
to be shutdown for conserving power, or for multiplexing
several ampliers onto a common cable. The amplier
will shut down by taking Pin 5 to V–. In shutdown, the
amplier dissipates 15mW while maintaining a true high
impedance output state of 20k in parallel with the feedback
resistors. For MUX applications, the ampliers may be
congured inverting, noninverting or differential. When
the output is loaded with as little 1k from the amplier’s
feedback resistors, the amplier shuts off in 600ns. This
shutoff can be under the control of HC CMOS operating
between 0V and –5V.
The ability to maintain shutoff is shown on the curve
Shutdown Supply Current vs Temperature in the Typical
Performance Characteristics section. At very high elevated
temperature it is important to hold the shutdown pin close
to the negative supply to keep the supply current from
increasing.
Send Color Video Over Twisted-Pair
With an LT1187 it is possible to send and receive color
composite video signals more than 1000 feet on a low cost
twisted-pair. A bi-directional “video bus” consists of the
LT1195 op amp and the LT1187 video difference amplier.
A pair of LT1195s at Transmit 1 is used to generate dif-
ferential signals to drive the line which is back-terminated
in its characteristic impedance. The LT1187 twisted-pair
receiver converts signals from differential to single-ended.
Topology of the LT1187 provides for cable compensation
at the amplier’s feedback node as shown. In this case,
1000 feet of twisted-pair is compensated with 1000pF
and 50
Ω to boost the 3dB bandwidth of the system from
750kHz to 4MHz. This bandwidth is adequate to pass a
3.58MHz chroma subcarrier and the 4.5MHz sound sub-
carrier. Attenuation in the cable can be compensated by
lowering the gain set resistor RG. At Transmit 2, another
pair of LT1195s serve the dual function to provide cable
termination via low output impedance, and generate dif-
ferential signals for Transmit 2. Cable termination is made
up of a 15
Ω and 33Ω attenuator to reduce the differential
input signal to the LT1187. Maximum input signal for the
LT1187 is 760mVP-P.
1MHz Sine Wave Gated Off with Shutdown Pin
AV = 2, RFB = RG = 1k
LT1187 AI07
1.5MHz Square Wave Input and Unequalized Response
Through 1000 Feet of Twisted-Pair
LT1187 AI08
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參數(shù)描述 |
|---|---|
| LT1187CS8#PBF | 功能描述:IC AMP VIDEO DIFFRNC ADJ 8-SOIC 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(qū)動器 輸出類型:差分 電路數(shù):3 -3db帶寬:350MHz 轉(zhuǎn)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) |
| LT1187CS8#TR | 功能描述:IC AMP VID DIFF CURR FDBK 8SOIC 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(qū)動器 輸出類型:差分 電路數(shù):3 -3db帶寬:350MHz 轉(zhuǎn)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) |
| LT1187CS8#TRPBF | 功能描述:IC AMP VIDEO DIFFRNC ADJ 8-SOIC 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(qū)動器 輸出類型:差分 電路數(shù):3 -3db帶寬:350MHz 轉(zhuǎn)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) |
| LT1187MJ8 | 制造商:Linear Technology 功能描述:Video Amp Single ±9V 18V 8-Pin CDIP |
| LT1189CN8 | 功能描述:IC AMP VIDEO DIFFRNC ADJ 8-DIP 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(qū)動器 輸出類型:差分 電路數(shù):3 -3db帶寬:350MHz 轉(zhuǎn)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) |
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