参数资料
| 型号： | ADV3200ASWZ |
| 厂商： | Analog Devices Inc |
| 文件页数： | 24/36页 |
| 文件大小： | 0K |
| 描述： | IC CROSSPOINT SWIT 32X32 176LQFP |
| 标准包装： | 1 |
| 功能： | 交叉点开关 |
| 电路： | 1 x 32:32 |
| 电压电源： | 单/双电源 |
| 电压 - 电源，单路/双路(±)： | 5V，±2.5V，±3.3V |
| 电流 - 电源： | 250mA |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 176-LQFP |
| 供应商设备封装： | 176-LQFP-EP（24x24） |
| 包装： | 托盘 |
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ADV3200/ADV3201
Rev. 0 | Page 30 of 3
6
Sync-Tip Clamp for AC-Coupled Inputs
The ADV3200/ADV3201 sync-tip clamp, when enabled, clamps
the most negative voltage of the video to equal VCLAMP. This
provides the correct dc level to the crosspoint switch and
ensures that, regardless of average picture level, the dynamic
range requirement is only the maximum input signal swing.
A basic method for ac coupling the input is to provide a series
capacitor at the input of the ADV3200/ADV3201. If a termina-
tion is provided, locate it before the series coupling capacitor.
Place the series coupling capacitor as close to the input pin as
possible.
It is important to choose the correct value for the ac coupling
capacitor at the input to the ADV3200/ADV3201. Too small a
value generates unacceptable droop as shown in Figure 100.
Using a large enough value, such as a 100 nF ac coupling
capacitor, prevents this droop, as shown in Figure 101.
The sync-tip clamp is enabled or disabled by the sync-tip clamp
enable bit in the 193-bit word used to serially program the
ADV3200/ADV3201. The sync-tip clamp enable bit turns the
clamp function on or off for all channels; there is no clamp
on/off control for individual channels. The sync-tip clamp
function works only with signals that contain sync-tips, such as
composite video. Signals that do not have sync-tips appear
distorted if they are run through the clamp function.
The range of VCLAMP is 1 V to +0.3 V for the ADV3200
at ±2.5 V operation, and 0.5 V to +0.3 V for the ADV3201
at ±3.3 V operation. If driving VCLAMP externally, refer to
Figure 14 for the input circuitry. Note that the VCLAMP pin
has a 6 kΩ resistor tied to an on-chip VREF buffered voltage
and a 50 μA current source that sets VCLAMP nominally to
300 mV below VREF. It is recommended that bypassing be
added on the VCLAMP pin, because noise and offsets can be
injected through this pin.
0.2
0.1
0
–0.1
–0.2
–0.3
–0.4
0
10
20
30
4050
60
7080
90
100
TIME (s)
V
OU
T
(V
)
07
17
6-
1
06
Figure 100. Video Signal with a 1 nF AC Coupling Capacitor
0.2
0.1
0
–0.1
–0.2
–0.3
0
10
20
30
4050
60
7080
90
100
TIME (s)
V
OU
T
(V
)
07
17
6-
1
07
Figure 101. Video Signal with a 100 nF AC Coupling Capacitor
0.2
0.3
0.4
0.5
0.6
0.7
0.1
0
–0.1
–0.2
–0.3
0
10
20
30
4050
60
7080
90
100
TIME (s)
IN
PU
T
VI
D
E
O
(V
)
07
17
6-
1
08
VREF = 0V
VCLAMP
Figure 102. Input Video Signal into Sync-Tip Clamp
0
0.1
0.2
0.3
0.4
0.5
–0.1
–0.2
–0.3
–0.4
–0.5
0
10
20
30
4050
60
7080
90
100
TIME (s)
OU
TP
U
T
V
ID
E
O
(
V
)
07
17
6-
1
09
VREF = 0V
VCLAMP = –0.5V
Figure 103. AC-Coupled Video Through ADV3201, Sync-Tip Clamp Enabled
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ADV3200-EVALZ | 功能描述:ADV3200 - Interface, Crosspoint Switch/Multiplexer Evaluation Board 制造商:analog devices inc. 系列:- 零件状态:有效 主要用途:接口，交叉点开关/多路复用器 嵌入式:- 使用的 IC/零件:ADV3200 主要属性:32 x 32 视频交叉点开关 辅助属性:图形用户界面 所含物品:板，线缆 标准包装:1 |
| ADV3201 | 制造商:AD 制造商全称:Analog Devices 功能描述:300 MHz, 32 × 32 Buffered Analog Crosspoint Switch |
| ADV3201ASWZ | 功能描述:IC CROSSPOINT SWIT 32X32 176LQFP RoHS:是 类别:集成电路 (IC) >> 接口 - 模拟开关，多路复用器，多路分解器 系列:- 应用说明:Ultrasound Imaging Systems Application Note 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:250 系列:- 功能:开关 电路:单刀单掷 导通状态电阻:48 欧姆 电压电源:单电源 电压 - 电源，单路/双路(±):2.7 V ~ 5.5 V 电流 - 电源:5µA 工作温度:0°C ~ 70°C 安装类型:表面贴装 封装/外壳:48-LQFP 供应商设备封装:48-LQFP（7x7） 包装:托盘 |
| ADV3201-EVALZ | 功能描述:ADV3201 - Interface, Crosspoint Switch/Multiplexer Evaluation Board 制造商:analog devices inc. 系列:- 零件状态:有效 主要用途:接口，交叉点开关/多路复用器 嵌入式:- 使用的 IC/零件:ADV3201 主要属性:32 x 32 视频交叉点开关 辅助属性:图形用户界面 所含物品:板，线缆 标准包装:1 |
| ADV3202 | 制造商:AD 制造商全称:Analog Devices 功能描述:300 MHz, 32 × 16 Buffered Analog Crosspoint Switch |
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