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参数资料
| 型号： | MAX9675EVKIT+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 16/27页 |
| 文件大小： | 0K |
| 描述： | KIT EVAL FOR MAX9675 |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 1 |
| 主要目的： | 接口，交叉点开关/多路复用器 |
| 嵌入式： | 否 |
| 已用 IC / 零件： | MAX9675 |
| 主要属性： | 16 x 16 视频交叉点开关 |
| 次要属性： | 图形用户界面，USB 接口 |
| 已供物品： | 板，缆线，CD |
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MAX9675
110MHz, 16 x 16 Video Crosspoint
Switch with Programmable Gain
______________________________________________________________________________________
23
Driving a PCB Interconnect or a Cable
(AV = +1V/V or +2V/V)
The MAX9675 output buffers can be programmed to
either AV = +1V/V or +2V/V. The +1V/V configuration is
typically used when driving a short-length (less than
3cm), high-impedance “local” PCB trace. To drive a
cable or a 75
Ω transmission line trace, program the
gain of the output buffer to +2V/V and place a 75
Ω
resistor in series with the output. The series termination
resistor and the 75
Ω load impedance act as a voltage-
divider that divides the video signal in half. Set the gain
to +2V/V to transmit a standard 1V video signal down a
cable. The series 75
Ω resistor is called the back-match,
reverse termination, or series termination. This 75
Ω
resistor reduces reflections, and provides isolation,
increasing the output-capacitive-driving capability.
Matrix Programming
The MAX9675’s unique digital interface simplifies pro-
gramming multiple MAX9675 devices in an array.
Multiple devices are connected with DOUT of the first
device connecting to DIN of the second device, and so
on (Figure 9). Two distinct programming modes, indi-
vidual output address mode (MODE = 0) and complete
matrix mode (MODE = 1), are selected by toggling a
single MODE control pin high or low. Both modes oper-
ate with the same physical board layout. This allows ini-
tial programming of the IC by daisy-chaining and
sending one long data word while still being able to
address immediately and update individual locations in
the matrix.
Individual Output Address Mode (Mode 0)
In Individual Output Address Mode, the devices are
connected in a serial bus configuration, with the data
routing gate (Figure 3) connecting DIN to DOUT, mak-
ing each device a virtual node on the serial bus. A sin-
gle 16-bit control word is sent to all devices
simultaneously. Only the device with the corresponding
chip address responds to the programming word, and
updates its output. In this mode, the chip address is set
through hardware pin strapping of A3–A0. The host
then communicates with the device by sending a 16-bit
word consisting of 2 don’t care MSB bits, 4 chip
address bits, and 10 bits of data to make the word
exactly 2 bytes in length. The 10 data bits are broken
down into 4 bits to select the output to be programmed;
1 bit to set the output enable; 1 bit to set gain; and 4
bits to select the input to be connected to that output.
In this method, the matrix is programmed one output at
a time.
Complete Matrix Mode (Mode 1)
In Complete Matrix Mode, the devices are connected in
a daisy-chain fashion where n x 96 bits are sent to pro-
gram the entire matrix, and where n = the number of
MAX9675 devices connected in series. This long data
word is structured such that the first bit is the LSB of
the last device in the chain and the last data bit is the
MSB of the first device in the chain. The total length of
the data word is equal to the number of crosspoint
devices to be programmed in series times 96 bits per
crosspoint device. This programming method is most
often used at startup to initially configure the switching
matrix.
0
10
5
20
15
25
30
0
500
OPTIMAL ISOLATION RESISTANCE
vs. CAPACITIVE LOAD
CAPACITIVE LOAD (pF)
ISOLATION
RESISTANCE
(Ω
)
200
100
300
400
Figure 8. Optimal Isolation Resistor vs. Capacitive Load
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX9675EVKIT+ | 功能描述:交换机 IC 开发工具 MAX9675 Eval Kit RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:USB Power Switches 工具用于评估:MAX4984E 工作电源电压:2.8 V to 5.5 V |
| MAX9679EVKIT# | 功能描述:显示开发工具 MAX9679 Eval Kit RoHS:否 制造商:4D Systems 产品:4Display Shields 工具用于评估:?OLED-160-G1, ?OLED-160-G2 接口类型:Serial 工作电源电压:5 V |
| MAX9679EVKIT+ | 功能描述:显示开发工具 MAX9679 Eval Kit RoHS:否 制造商:4D Systems 产品:4Display Shields 工具用于评估:?OLED-160-G1, ?OLED-160-G2 接口类型:Serial 工作电源电压:5 V |
| MAX967ESA | 功能描述:校验器 IC Dual Comparator / Reference RoHS:否 制造商:STMicroelectronics 产品: 比较器类型: 通道数量: 输出类型:Push-Pull 电源电压-最大:5.5 V 电源电压-最小:1.1 V 补偿电压（最大值）:6 mV 电源电流（最大值）:1350 nA 响应时间: 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:SC-70-5 封装:Reel |
| MAX967ESA+ | 功能描述:校验器 IC Dual Comparator / Reference RoHS:否 制造商:STMicroelectronics 产品: 比较器类型: 通道数量: 输出类型:Push-Pull 电源电压-最大:5.5 V 电源电压-最小:1.1 V 补偿电压（最大值）:6 mV 电源电流（最大值）:1350 nA 响应时间: 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:SC-70-5 封装:Reel |
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