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參數資料
| 型號： | AD811 |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | High Performance Video Op Amp(高性能視頻運放) |
| 中文描述： | 高性能視頻運算放大器（高性能視頻運放） |
| 文件頁數： | 14/16頁 |
| 文件大?。?/td> | 286K |
| 代理商： | AD811 |
AD811
REV. C
–14–
than 4 as in the VCA circuit of Figure 40. However, this cannot
be achieved by lowering the feedback resistor, since below a
critical value (not much less than 500
) the AD811’s peaking
may be unacceptable. T his is because the dominant pole in the
open-loop ac response of a current-feedback amplifier is con-
trolled by this feedback resistor. It would be possible to operate
at a gain of X 4 and then attenuate the signal at the output. In-
stead, we have chosen to attenuate the signals by 6 dB at the in-
put to the AD811; this is the function of R8 through R11.
Figure 42 is a plot of the ac response of the feedback keyer,
when driving a reverse terminated 50
cable. Output noise and
adjacent channel feedthrough, with either channel fully off and
the other fully on, is about –50 dB to 10 MHz. T he feedthrough
at 100 MHz is limited primarily by board layout. For V
G
=
+1 V, the –3 dB bandwidth is 15 MHz when using a 137
resistor for R14 and 70 MHz with R14 = 49.9
. For further
information regarding the design and operation of the VCA and
video keyer circuits, refer to the application note “Video VCA’s
and K eyers Using the AD834 & AD811” by Brunner, Clarke,
and Gilbert, available FREE from Analog Devices.
100M
–60
–80
100k
–70
10k
–30
–50
–40
–20
–10
0
10M
1M
FREQUENCY – Hz
C
ADJACENT
CHANNEL
FEEDTHROUGH
GAIN
R14 = 137
R14 = 49.9
Figure 42. A Plot of the AC Response of the Video Keyer
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相關代理商/技術參數 |
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| AD811_04 | 制造商:AD 制造商全稱:Analog Devices 功能描述:High Performance Video Op Amp |
| AD8110 | 制造商:AD 制造商全稱:Analog Devices 功能描述:260 MHz, 16 x 8 Buffered Video Crosspoint Switches |
| AD8110AST | 制造商:Analog Devices 功能描述:Analog Video Crosspoint 390MHz 16 x 8 80-Pin LQFP 制造商:Rochester Electronics LLC 功能描述:TQFP 250MHZ 16X8 G=+1 BUF VID XPOINT SW. - Tape and Reel 制造商:Analog Devices 功能描述:SWITCH CROSSPOINT 16X8 SMD 8110 制造商:Analog Devices 功能描述:260 MHz, 168 Buffered Video Crosspoint Switches |
| AD8110ASTZ | 功能描述:IC VIDEO CROSSPOINT SWIT 80LQFP 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:- 其它有關文件:STG4159 View All Specifications 標準包裝:5,000 系列:- 功能:開關 電路:1 x SPDT 導通狀態(tài)電阻:300 毫歐 電壓電源:雙電源 電壓 - 電源，單路/雙路(±):±1.65 V ~ 4.8 V 電流 - 電源:50nA 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:7-WFBGA，FCBGA 供應商設備封裝:7-覆晶 包裝:帶卷 (TR) |
| AD8110ASTZ | 制造商:Analog Devices 功能描述:Analog Crosspoint Switch IC |
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