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参数资料
| 型号： | AD813ACHIPS |
| 厂商： | ANALOG DEVICES INC |
| 元件分类： | 音频／视频放大 |
| 英文描述： | Single Supply, Low Power Triple Video Amplifier |
| 中文描述： | 3 CHANNEL, VIDEO AMPLIFIER, UUC16 |
| 封装： | DIE-16 |
| 文件页数： | 9/19页 |
| 文件大小： | 550K |
| 代理商： | AD813ACHIPS |
AD813
REV. B
–17–
Disable Mode Operation
Pulling the voltage on any one of the Disable pins about 2.5 V
down from the positive supply will put the corresponding ampli-
fier into a disabled, powered down, state. In this condition, the
amplifier’s quiescent supply current drops to about 0.5 mA, its
output becomes a high impedance, and there is a high level of
isolation from input to output. In the case of the gain of two
line driver for example, the impedance at the output node will
be about the same as for a 1.4 k
resistor (the feedback plus
gain resistors) in parallel with a 12.5 pF capacitor and the input
to output isolation will be about 65 dB at 1 MHz.
Leaving the Disable pin disconnected (floating) will leave the
corresponding amplifier operational, in the enabled state. The
input impedance of the disable pins is about 35 k
in parallel
with a few pF. When grounded, about 50
A flows out of a
disable pin on
±5 V supplies.
Input voltages greater than about 1.5 V peak-to-peak will defeat
the isolation. In addition, large signals (greater than 3 V peak-
to-peak) applied to the output node will cause the output im-
pedance to drop significantly.
When the Disable pins are driven by complementary output
CMOS logic (such as the 74HC04), the disable time is about
80 ns (until the output goes high impedance) and the enable
time is about 100 ns (to low impedance output) on
±15 V sup-
plies. When operated on
±15 V supplies, the disable pins
should be driven by open drain logic. In this case, pull-up resis-
tors from the disable pins to the plus supply will ensure mini-
mum switching time.
75
VOUT
75
CABLE
1
VIN1
84
+5V
464
590
7
4
5
6
SELECT1
2
VIN2
84
464
590
14
12
13
SELECT2
VIN3
84
3
464
590
8
10
9
SELECT3
11
–5V
Figure 55. A Fast Switching 3:1 Video Mux
(Supply Bypassing Not Shown)
Operation Using a Single Supply
The AD813 will operate with total supply voltages from 36 V
down to 2.4 V. With proper biasing (see Figure 52) it can
make an outstanding single supply video amplifier. Since the
input and output voltage ranges extend to within 1 V of the
supply rails, it will handle a 1.3 V peak-to-peak signal on a
single 3.3 V supply, or a 3 V peak-to-peak signal on a single
5 V supply. The small signal 0.1 dB bandwidths will exceed
10 MHz in either case, and the large signal bandwidths will
exceed 6 MHz.
The capacitively coupled cable driver in Figure 52 will achieve
outstanding differential gain and phase errors of 0.05% and 0.05
degrees respectively on a single 5 V supply. Resistor R2, in this
circuit, is selected to optimize the differential gain and phase by
biasing the amplifier in its most linear region.
75
AD813
4
11
VIN
R2
12.4k
VOUT
75
+5V
75
CABLE
C2
1 F
R1
9k
C1
2 F
C3
30 F
619
R3
1k
COUT
47 F
Figure 52. Biasing for Single Supply Operation
1
10
1000
100
FREQUENCY – MHz
–0.5
–3.0
0.5
0
–1.0
–1.5
–2.0
–2.5
CLOSED-LOOP
GAIN
–
dB
0
–90
–180
–270
PHASE
SHIFT
–
Degrees
–3.5
GAIN
PHASE
VS = 5V
G = +2
RF = 619
RL = 150
Figure 53. Closed-Loop Gain and Phase vs. Frequency,
Circuit of Figure 52
10
100
0%
500mV
1V
500mV
50ns
90
VIN
VOUT
Figure 54. Pulse Response for the Circuit of Figure 52
with +VS = 5 V
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相关代理商/技术参数 |
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|---|---|
| AD813AN | 制造商:Analog Devices 功能描述:OP Amp Triple GP R-R O/P 制造商:Rochester Electronics LLC 功能描述:TRPL LO PWR I-FDBK OP AMP - Bulk 制造商:Analog Devices 功能描述:IC AMP TRIPLE VIDEO DIP14 813 |
| AD813ANZ | 功能描述:IC OPAMP TRIPLE VIDEO LP 14DIP RoHS:是 类别:集成电路 (IC) >> 线性 - 放大器 - 视频放大器和频缓冲器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:50 系列:- 应用:TFT-LCD 面板：VCOM 驱动器 输出类型:满摆幅 电路数:1 -3db带宽:35MHz 转换速率:40 V/µs 电流 - 电源:3.7mA 电流 - 输出 / 通道:1.3A 电压 - 电源，单路/双路(±):9 V ~ 20 V，±4.5 V ~ 10 V 安装类型:表面贴装 封装/外壳:8-TSSOP，8-MSOP（0.118"，3.00mm 宽）裸露焊盘 供应商设备封装:8-uMax-EP 包装:管件 |
| AD813AR-14 | 功能描述:IC TRPL VIDEO AMP SNGL LP 14SOIC RoHS:否 类别:集成电路 (IC) >> 线性 - 放大器 - 视频放大器和频缓冲器 系列:- 标准包装:1,000 系列:- 应用:驱动器 输出类型:差分 电路数:3 -3db带宽:350MHz 转换速率:1000 V/µs 电流 - 电源:14.5mA 电流 - 输出 / 通道:60mA 电压 - 电源，单路/双路(±):5 V ~ 12 V，±2.5 V ~ 6 V 安装类型:表面贴装 封装/外壳:20-VFQFN 裸露焊盘 供应商设备封装:20-QFN 裸露焊盘（4x4） 包装:带卷 (TR) |
| AD813AR-14 | 制造商:Analog Devices 功能描述:SEMICONDUCTORS LINEAR |
| AD813AR-14-EBZ | 功能描述:BOARD EVAL FOR AD813AR-14 RoHS:是 类别:编程器，开发系统 >> 评估演示板和套件 系列:* 标准包装:1 系列:- 主要目的:电信，线路接口单元（LIU） 嵌入式:- 已用 IC / 零件:IDT82V2081 主要属性:T1/J1/E1 LIU 次要属性:- 已供物品:板，电源，线缆，CD 其它名称:82EBV2081 |
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