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参数资料
| 型号： | DG884AM883 |
| 厂商： | Vishay Intertechnology,Inc. |
| 英文描述： | 8 x 4 Wideband Video Crosspoint Array |
| 中文描述： | 8 × 4交叉点阵列宽带视频 |
| 文件页数： | 12/14页 |
| 文件大小： | 166K |
| 代理商： | DG884AM883 |
DG884
Vishay Siliconix
www.vishay.com
12
Document Number: 70071
S-52433—Rev. G, 20-Dec-04
APPLICATIONS
DG884
+5 V
+15 V
3 V
+
+
C
1
+
V
V+
C
2
C
1
C
2
51
51
51
C
1
C
2
C
1
= 1 F Tantalum
C
2
= 100 nF Ceramic
V
L
FIGURE 14.
DG884 Power Supply Decoupling
6
5
4
3
2
1
0
0
2
4
6
V
L
Logic Supply (V)
8
10
12
14
16
18
V
FIGURE 15.
Switching Threshold Voltage vs. V
L
Power Supplies and Decoupling
A useful feature of the DG884 is its power supply flexibility. It
can be operated from dual supplies, or a single positive supply
(V
connected to 0 V) if required. Allowable operating voltage
ranges are shown in Operating Voltage Range (Typical
Characteristics) graph, page 6.
Note that the analog signal must not go below V
by more than
0.3 V (see absolute maximum ratings). However, the addition
of a V
pin has a number of advantages:
1)
It allows flexibility in analog signal handling, i.e. with
V
=
5 V and V+ = 15 V, up to
accepted.
5-V ac signals can be
2)
The value of on-capacitance [C
S(on)
] may be reduced
by increasing the value of V
. It is useful to note that
optimum video differential phase and gain occur when
V
is
3 V. Note that V+ has no effect on C
S(on)
.
3)
V
eliminates the need to bias an ac analog signal
using potential dividers and large decoupling capaci-
tors.
It is established RF design practice to incorporate sufficient
bypass capacitors in the circuit to decouple the power supplies
to all active devices in the circuit. The dynamic performance
of the DG884 is adversely affected by poor decoupling of
power supply pins. Also, since the substrate of the device is
connected to the negative supply, proper decoupling of this pin
is essential.
Rules:
1)
Decoupling capacitors should be incorporated on all
power supply pins (V+, V
, V
L
).
They should be mounted as close as possible to the
device pins.
2)
3)
Capacitors should have good high frequency charac-
teristics—tantalum bead and/or monolithic ceramic
disc types are suitable.
Recommended decoupling capacitors are 1- to 10- F
tantalum bead, in parallel with 100-nF monolithic ceramic.
4)
Additional high frequency protection may be provided
by 51- carbon film resistors connected in series with
the power supply pins (see Figure 14).
The V
L
pin permits interface to various logic types. The device
is primarily designed to be TTL or CMOS logic compatible with
+5 V applied to V
L
. The actual logic threshold can be raised
simply by increasing V
L
.
相关PDF资料 |
PDF描述 |
|---|---|
| DG884 | 8 x 4 Wideband Video Crosspoint Array(8 x 4宽带视频交叉开关) |
| DG894 | Component Video Selector(用于视频信号转换的视频选择器) |
| DG894 | Component Video Selector |
| DG9051 | Precision 8-Ch/Dual 4-Ch/Triple 2-Ch Low Voltage Analog Switches/Multiplexers |
| DG9051DQ-T1-E3 | Precision 8-Ch/Dual 4-Ch/Triple 2-Ch Low Voltage Analog Switches/Multiplexers |
相关代理商/技术参数 |
参数描述 |
|---|---|
| DG884AP | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Cross-Point Switch |
| DG884DJ | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Cross-Point Switch |
| DG884DN | 功能描述:视频开关 IC 8x4 Video Crosspoint 18 RoHS:否 制造商:Texas Instruments 开关数量:4 开启电阻（最大值）:12 Ohms 传播延迟时间: 开启时间（最大值）: 关闭时间（最大值）: 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:WQFN-42 封装:Reel |
| DG884DN-E3 | 功能描述:多路器开关 IC 8x4 Wideband Video Multiplexer/MUX RoHS:否 制造商:Texas Instruments 通道数量:1 开关数量:4 开启电阻（最大值）:7 Ohms 开启时间（最大值）: 关闭时间（最大值）: 传播延迟时间:0.25 ns 工作电源电压:2.3 V to 3.6 V 工作电源电流: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:UQFN-16 |
| DG894 | 制造商:VISHAY 制造商全称:Vishay Siliconix 功能描述:Component Video Selector |
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