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參數(shù)資料
| 型號： | LT1190CS8 |
| 廠商： | Linear Technology |
| 文件頁數(shù)： | 12/12頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC OP-AMP VIDEO HISPD SNGL 8SOIC |
| 標(biāo)準(zhǔn)包裝： | 100 |
| 應(yīng)用： | 通用 |
| 電路數(shù)： | 1 |
| 轉(zhuǎn)換速率： | 450 V/µs |
| 電流 - 電源： | 32mA |
| 電流 - 輸出 / 通道： | 50mA |
| 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(yīng)商設(shè)備封裝： | 8-SOIC |
| 包裝： | 管件 |
9
LT1190
Output Shutdown
Cable Terminations
The LT1190 operational amplifier has been optimized as a
low cost video cable driver. The
±50mAguaranteedoutput
current enables the LT1190 to easily deliver 7.5VP-P into
100
, while operating on ±5V supplies or 2.6VP-P on a
single 5V supply.
APPLICATIO S I FOR ATIO
WU
UU
FREQUENCY (Hz)
CLOSED-LOOP
VOLTAGE
GAIN
(dB)
10
8
6
4
2
0
–2
–4
–6
–8
–10
LT1190 TA08
100M
10M
1M
100k
VS = ±5V
TA = 25°C
AV = 2
RFB = 1k
RG = 330
AV = 1
RFB = 1k
RG = 1k
CABLE
2
+
–
5V
7
LT1190
–5V
4
3
6
Cable Driver Voltage Gain vs Frequency
Double Terminated Cable Driver
RG
75
75
RFB
When driving a cable it is important to terminate the cable
to avoid unwanted reflections. This can be done in one of
two ways: single termination or double termination. With
single termination, the cable must be terminated at the
receiving end (75
to ground) to absorb unwanted en-
ergy. The best performance can be obtained by double
termination (75
in series with the output of the amplifier,
and 75
to ground at the other end of the cable). This
termination is preferred because reflected energy is ab-
sorbed at each end of the cable. When using the double
termination technique it is important to note that the signal
is attenuated by a factor of 2, or 6dB. This can be compen-
sated for by taking a gain of 2, or 6dB in the amplifier. The
cable driver has a – 3dB bandwidth in excess of 30MHz
while driving the 150
load.
Using the Shutdown Feature
The LT1190 has a unique feature that allows the amplifier
to be shut down for conserving power or for multiplexing
several amplifiers onto a common cable. The amplifier will
shut down by taking Pin 5 to V –. In shutdown, the
amplifier dissipates 15mW while maintaining a true high
impedance output state of 15k
in parallel with the
feedback resistors. The amplifiers must be used in a
noninverting configuration for MUX applications. In in-
verting configurations the input signal is fed to the output
through the feedback components. The following scope
photos show that with very high RL, the output is truly high
impedance; the output slowly decays toward ground.
Additionally, when the output is loaded with as little as 1k
the amplifier shuts off in 400ns. This shutoff can be under
the control of HC CMOS operating between 0V and – 5V.
LT1190 TA09
1MHz SINE WAVE GATED OFF WITH
SHUTDOWN PIN, AV = 1, RL = SCOPE PROBE
VOUT
–5V
0V
VSHDN
LT1190 TA10
1MHz SINE WAVE GATED OFF WITH
SHUTDOWN PIN, AV = 1, RL = 1k
VOUT
–5V
0V
VSHDN
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| LT1190CS8#PBF | 功能描述:IC OP-AMP VIDEO HISPD SNGL 8SOIC 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(biāo)準(zhǔn)包裝:1,000 系列:- 應(yīng)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(yīng)商設(shè)備封裝:20-QFN 裸露焊盤（4x4） 包裝:帶卷 (TR) |
| LT1190CS8#TR | 功能描述:IC AMP VIDEO SGL HI SPEED 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(biāo)準(zhǔn)包裝:1,000 系列:- 應(yīng)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(yīng)商設(shè)備封裝:20-QFN 裸露焊盤（4x4） 包裝:帶卷 (TR) |
| LT1190CS8#TRPBF | 功能描述:IC OP-AMP VIDEO HISPD SNGL 8SOIC 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(biāo)準(zhǔn)包裝:1,000 系列:- 應(yīng)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(yīng)商設(shè)備封裝:20-QFN 裸露焊盤（4x4） 包裝:帶卷 (TR) |
| LT1190MJ8/883 | 制造商:Linear Technology 功能描述:OP Amp Single GP ±9V/18V 8-Pin CDIP |
| LT1191CN8 | 功能描述:IC OP-AMP VIDEO HI-SPD SNGL 8DIP 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(biāo)準(zhǔn)包裝:1,000 系列:- 應(yīng)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(yīng)商設(shè)備封裝:20-QFN 裸露焊盤（4x4） 包裝:帶卷 (TR) |
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