【应用】沁恒低阻模拟开关CH440R用作VGA视频信号切换开关,静态电源电流低至0.1μA,带宽高达550MHz
该项目是为某公司定制的一块系统控制板,主要功能是CPU通过PCIe外接了一个NVME的SSD和一个显卡芯片,通过网口接收其他设备的数据,经过处理后在显示器上进行显示,SSD用来存放操作系统。显卡输出一路VGA,外接显示器用,但是要求VGA接口能在两个显示器之间切换,于是我们选用了沁恒公司的低阻模拟开关CH440R作为VGA信号的切换开关。
图 1 板卡主要功能框图
板卡的工作原理是处理器通过一组PCIe总线外接一个NVME的SSD,用来存放操作系统,另一组PCIe总线外接一个PCIe显卡,输出一路VGA信号,作为人机交互界面。为了方便使用,VGA需要能切换到两个显示器进行显示,沁恒的CH440R就是VGA信号的切换开关。
选择CH440R的原因主要有以下几点:
1) CH440R集成4路高速双向2选1模拟开关,项目需求是作为视频信号的2选1开关,符合要求;
2) CH440R的带宽高达550MHz,可用于视频或USB信号,这里用来切换VGA视频信号,满足要求;
3) 项目要求尽量选用小体积的器件,以便减小板卡的pcb面积,CH440R采用TSSOP16封装,体积不大,也可以满足项目要求;
4)CH440R采用3.3V电源,可以和其他器件统一采用3.3V电压供电,无需单独供电,符合项目尽量简化电路设计的要求;
5) 项目要求尽量选用成熟的器件,南京沁恒公司的产品质量可靠,值得信赖;
CH440R是沁恒公司的高速模拟开关芯片, CH440R主要性能特点如下:
●低导通电阻,Ron 典型值约为 5Ω
●切换快速,Ton/Toff 典型值小于 5nS
●ESD 支持 2KV HBM
●CH440提供全局使能引脚
图 2 CH440R功能框图
CH440R的真值表
图 3 CH440R原理图
CH440R集成了4路2选1模拟开关,因为VGA信号包含R、G、B、VS、HS、SCL、SDA七个信号,所以用了两颗CH440R。其中DA、DB、DC、DD为信号的公共端,接显卡输出;S1和S2分别为模拟开关的两组切换输出信号,见上图。其中CRTHS,CRTVS,CRT_R,CRT_G,CRT_B,SCL,SDA为显卡VGA输出信号;HS1,VS1,SCL1,SDA1,R1,G1,B1为一组切换输出;HS2,VS2,SCL2,SDA2,R2,G2,B2为另一组切换输出。CH440R需要一直工作,所以EN#引脚接地。VGA_SW信号接控制信号,用于切换两组输出,这里加了上拉电阻,默认信号输出到CH440R的S2端口,如果VGA_SW拉低,则切换到CH440R的S1端口。CH440R的VCC为电源输入,这里加了磁珠和电容进行滤波,可以滤除电源中的高频干扰。
图 4 CH440R PCB图
CH440R的PCB设计并不复杂,需要注意的是RGB信号为模拟信号,要采用包地处理,减少其他信号的干扰。
我们用两颗料作为VGA信号的切换开关,经过实际测试,VGA信号经过CH440R切换后,并没有出现干扰问题,显示效果很好,完全满足应用需要。
- |
- +1 赞 0
- 收藏
- 评论 0
本文由深蓝的鱼提供,版权归世强硬创平台所有,非经授权,任何媒体、网站或个人不得转载,授权转载时须注明“来源:世强硬创平台”。
相关推荐
【应用】沁恒USB转串口芯片CH340N在便携式低功耗产品上的应用,外围器件少且成本低
作者开发低功耗便携式产品,在前期的开发验证过程中需要用到串口输出调试信息,沁恒科技推出的一款USB转串口芯片CH340N采用SOP-8的封装形式尺寸小,而且成本低满足设计要求。
应用方案 发布时间 : 2022-08-27
沁恒的无线MCU可单芯片构建8kHz高回报率无线应用方案,用技术改写速度!
沁恒的无线MCU可单芯片构建各类高性能无线方案,助力客户轻松应对高端电子产品8k回报率的严苛性能要求。用技术改写速度,用专业打造极致。
应用方案 发布时间 : 2024-08-27
【应用】沁恒蓝牙MCU CH582用于带触摸按键的智能门锁等电子产品,支持BLE V5.3
CH58X系列蓝牙MCU不仅集成了沁恒最新一代触摸按键模块,内置2.4GHz RF收发器和基带及链路控制,支持BLE V5.3,并且有着出色的低功耗表现。这些性能使得CH58X系列蓝牙MCU成为带触摸按键的低功耗智能化电子产品最佳选择之一。
应用方案 发布时间 : 2022-08-06
CH芯片的引脚图器件库和封装图
型号- CH366Q,CH378Q,CH451L,CH463Q,CH451S,CH32F205RBT6,CH452A,CH331A,CH246D,CH331G,CH343G,CH32F203C8T6,CH355L,CH573F,CH367L,CH440G,CH365P,CH450K,CH353L,CH462Q,CH571K,CH583M,CH32V208WBU6,CH341T,CH32V208RBT6,CH9350L,CH32V003J4M6,CH462X,CH32V305RBT6,CH342F,CH342K,CH221K,CH378L,CH9374B,CH340K,CH352L,CH376T,CH376S,CH340N,CH364P,CH582M,CH9102X-1,CH340T,CH9141K,CH340X,CH32V208GBU6,CH341B,CH341A,CH341F,CH571F,CH32V203C8T6,CH341C,CH450H,CH484M,CH351Q,CH,CH32V203G6U6,CH340E,CH582F,CH32F203C8U6,CH340C,CH32V203C8U6,CH340B,CH243K,CH340G,CH390H,CH334R,CH32V303VCT6,CH334Q,CH334P,CH552T,CH390L,CH334U,CH552P,CH334S,CH32V003A4M6,CH456G,CH335F,CH456K,CH32F203C6T6,CH359L,CH444G,CH456H,CH311L,CH541G,CH9328,CH563Q,CH9329,CH345T,CH454S,CH9326,CH343G(编带),CH334F,CH32F208RBT6,CH358L,CH334H,CH455H,CH455G,CH334G,CH32F203VCT6,CH32F208WBU6,CH552E,CH443K,CH552G,CH455K,CH540G,CH344Q,CH182H,CH182F,CH235S,CH236D,CH32V203C6T6,CH563L,CH442E,CH32V307VCT6,CH224K,CH551G,CH343P,CH181H,CH561Q,CH376T(编带装),CH452L,CH440R,CH9340K,CH9340C,CH247D,CH32F207VCT6,CH344L,CH368L,CH423S,CH32V303RCT6,CH382L,CH217X,CH32V103R8T6,CH370T,CH448F,CH32F203K8T6,CH412A,CH32V203F8U6,CH315G,CH412K,CH9143,CH557Q,CH32V203G8R6,CH9140,CH9142,CH9141,CH545L,CH543T,CH446Q,CH446X,CH9126,CH555Q,CH32F103R8T6,CH32F203RCT6,CH217K,CH568L,CH554T,CH457S,CH32V003F4P6,CH445P,CH9101Y,CH554P,CH32V303RBT6,CH9101N,CH9101R,CH9101U,CH9343G,CH579F,CH543D,CH9101H,CH32V307RCT6,CH32V203K8T6,CH334H(编带),CH9343L,CH555L,CH543K,CH9121,CH422G,CH543G,CH9120,CH32V203G8P6,CH410K,CH567L,CH32V307WCU6,CH579M,CH432Q,CH347T,CH9102X,CH444P,CH541T,CH9103,CH432T,CH541P,CH565W,CH421A,CH554E,CH9344L,CH578M,CH348L,CH554G,CH348Q,CH392F,CH227P,CH32V203F6P6,CH542G,CH9102F,CH32V203RBT6,CH483M,CH241K,CH32F203CBT6,CH32V103C8T6,CH374U,CH374T,CH374S,CH483X,CH549L,CH375C,CH549F,CH375B,CH549G,CH581F,CH9434A,CH32F103C8T6,CH559T,CH32V103C8U6,CH32V003F4U6,CH482X,CH397Y,CH548G,CH374F,CH592F,CH132F,CH548L,CH548N,CH132H,CH374G,CH32V208CBU6,CH384L,CH558T,CH32V303CBT6,CH32V305FBP6,CH547G,CH32V203K6T6,CH397A,CH547F,CH482D,CH397G,CH591D,CH397F,CH457VS,CH591F,CH438L,CH317L,CH559L,CH547L,CH438Q,CH569W,CH395L,CH424Q,CH395Q,CH412Z,CH449F,CH546G,CH372C,CH372B,CH558L,CH546L,CH481D
【产品】沁恒低阻模拟开关芯片CH440/2/3/4/8/5,低导通电阻,Ron典型值约为5Ω
沁恒品牌推出了CH440G、CH440P、CH440R、CH442E、CH443K、CH444G、CH444P、CH445P、CH448F低阻模拟开关芯片,低导通电阻,Ron典型值约为5Ω,高带宽,支持视频信号,支持低速、全速和高速USB信号。
产品 发布时间 : 2022-06-09
CH440/CH442/CH443/CH444/CH445/CH448 手册
型号- CH445,CH448U,CH448,CH444P,CH445P,CH440R,CH440P,CH442Q,CH448F,CH440,CH442E,CH444G,CH442,CH444,CH443K,CH443,CH440G
CH440/CH442/CH443/CH444/CH445/CH448 模拟开关芯片手册
型号- CH445,CH444P,CH448,CH445P,CH440R,CH440P,CH448F,CH440,CH442E,CH444G,CH442,CH443K,CH444,CH440G,CH443
沁恒(WCH)通讯接口芯片和全栈MCU选型指南
描述- 南京沁恒微电子股份有限公司专注于连接技术和微处理器内核研究,是一家基于自研专业接口IP、微处理器内核IP构建芯片的集成电路设计企业。公司致力于为客户提供万物互联、上下互通的芯片及解决方案,主要产品包括USB/蓝牙/以太网接口芯片和连接型/互联型/无线型MCU,产品侧重于连接联网和控制。
型号- CH24X,CH233P,CH36X,CH32X035F8U6,CH32X035G8R6,CH32V103C6T6,CH32F205RBT6,CH370,CH372,CH251,CH343G,CH374,CH132,CH253,CH252,CH376,CH343K,CH375,CH254,CH32V006F8P6,CH378,CH377,CH440G,CH32X035,CH25X,CH32V208WBU6,CH583M,CH341T,CH32V003J4M6,CH32F103C6T6,CH233A,CH342F,CH382,CH32V006E8R6,CH384,CH342K,CH233K,CH37X,CH9374B,CH237,CH236,CH58X,CH32F103C8U6,CH340K,CH231K,CH22X,CH238,CH34X,CH340N,CH582M,CH340T,NET-SER-DT TTL,CH341B,CH341A,CH592,CH341F,CH591,CH231,CH486F,CH230,CH233,CH235,CH35X,CH32X035F7P6,CH368,CH484M,CH230K,CH23X,CH231A,CH32V203G6U6,CH340E,CH582F,CH482,CH481,CH340C,CH484,CH340B,CH483,CH365,CH486,CH364,CH340G,CH246,CH367,CH59X,CH4XX,CH366,CH578,CH334R,CH457,CH577,CH32V303VCT6,CH335,CH334Q,CH456,CH334P,CH338,CH579,CH32V,CH56X,CH334U,CH339,CH32X,CH564Q,CH334S,CH32V003A4M6,CH32X033F8P6,CH32F,CH335F,CH347F,CH32M,CH335J,CH32L,CH565M,CH451,CH571,CH450,CH444G,CH238P,CH453,CH573,CH452,CH334,CH455,CH454,CH347,CH226,CH57X,CH225,CH348,CH32X035G8U6,CH237D,CH9342G,CH334F,CH581,CH583,CH564L,CH334H,CH341,CH220,CH462,CH582,CH32F208WBU6,CH340,CH32X035R8T6,CH564F,CH343,CH342,CH221,CH463,CH334L,CH345,CH224,CH443K,CH344,CH223,CH344Q,CH555,CH557,CH315,CH318,CH54X,CH559,CH317,CH438,NET-485-9120,CH235S,CH32V002系列,CH32M007,CH236D,CH442E,CH552,CH551,CH554,CH432,CH567,CH343P,CH446,CH445,CH569,CH55X,CH448,CH568,CH440R,CH31X,CH449,CH440P,CH9340K,CH9340C,CH32F207VCT6,CH561,CH440,CH563,CH442,CH344L,CH565,CH323,CH444,CH564,CH443,CH412,CH64X,CH338X,CH52X,CH32V103R8T6,CH448F,CH32V203F8U6,CH9103M,CH32V203G8R6,CH532,CH531,CH545,CH423,CH547,CH546,CH446Q,CH53X,CH549,CH446X,CH548,CH32F103R8T6,BLE-DONGLE,CH338F,CH9104L,CH338L,CH541,CH543,CH422,CH32V003F4P6,CH9101Y,CH445P,CH9101N,CH9101R,CH9101U,CH9101H,CH32V307RCT6,CH347T,CH643,CH522,CH9102X,CH525,CH444P,CH645,CH524,CH527,CH528,CH565W,CH9344L,CH348L,BLE-SER-A-ANT,CH348Q,CH32V203F6P6,CH521,CH641,CH9102F,CH645W,CH32F203CBT6,CH32V006K8U6,CH32F207,CH32F205,CH32F203,CH32V003F4U6,CH32F208,CH645F,BLE2U-C-ANT,CH643U,CH643W,CH643Q,CH449X,CH32V303CBT6,CH32L103F8U6,CH32V305FBP6,CH569W,CH32F103,CH449F,CH32L103G8R6,CH643L,CH32X035系列,CH32F203C8T6,CH32V208RBT6,CH32V203系列,CH32V305RBT6,CH32V007系列,NET-232-9120,CH32V208GBU6,CH32L103F8P6,CH32V203C8T6,CH32V307,CH32V305,CH32F203C8U6,CH32V203C8U6,CH32V303,CH9160-DG-R0,BLE-TPT-A-ANT,CH32F203C6T6,BLE2U-A-ANT,CH9343,NET-TTL-9120,CH9328,CH9329,CH9326,CH9445,CH32L103C8T6,CH32F208RBT6,CH32F203VCT6,CH32V005F6U6,CH182H,CH182F,CH32V305GBU6,CH9434,CH32V203C6T6,CH32V307VCT6,CH181H,CH32L103系列,CH32V203F8P6,BLE-TPT-B-ANT,CH32V005D6U6,CH912X,CH32V303RCT6,CH32V005E6R6,CH32V003系列,CH32F203K8T6,NET-SER-DT RS232,CH9143,CH93XX,CH9140,CH9142,CH9141,CH9126,CH32V005F6P6,CH32F203RCT6,NET-SER-DT RS485,CH32L103,CH32V006,CH32V007,CH32V005,CH32V002,CH32V003,CH32X035C8T6,CH32V303RBT6,CH32V203K8T6,CH9121,CH9120,CH32V307WCU6,CH32V303系列,CH32F203RBT6,CH32V203RBT6,CH9350,CH483M,CH32V103C8T6,CH32V005系列,CH592X,CH483X,CH32M系列,CH230A,CH32V317,CH581F,CH32F103C8T6,CH32V103C8U6,CH482X,CH32L103K8U6,CH591R,CH32V208,CH182,CH592F,CH32V103系列,CH32V203,CH592D,CH32V208CBU6,CH914X,CH390,CH32V203K6T6,CH392,CH271,CH591D,CH482D,CH591F,CH275,CH395,CH397,CH38X,BLE232-NEP,CH32V006F8U6,CH32V103,CH39X,CH481D
沁恒模拟开关芯片选型表
沁恒模拟开关芯片选型表,主要包含低阻宽带双向模拟开关芯片,矩阵模拟开关芯片,矩阵差分信号模拟开关芯片,矩阵交换宽带超速模拟开关芯片,宽带超速双向模拟开关芯片,宽带超速双向+DPDT宽带高速双向模拟开关芯片,宽带超速双向模拟开关芯片,超高速差分信号双向模拟开关芯片八个品类。包含4路二选一、2路二选一、1路二选一、2路四选一、2路八选一、1路十六选一、16*8阵列、24*5阵列、2路四交换四、2路二交叉、6路二选一、4路四选一、4X4通道交替模式MUX等开关。
产品型号
|
品类
|
功能描述
|
典型供电(V)
|
典型内阻(Ω)
|
典型带宽(MHz)
|
信号电压(V)
|
封装
|
应用信号推荐
|
CH440G
|
低阻宽带双向模拟开关芯片
|
4路二选一
|
3.3V/5V
|
4.5Ω
|
520MHz
|
0~VDD
|
SOP16
|
USB2.0(480Mbps)
|
选型表 - 沁恒 立即选型
CH440/CH442/CH443/CH444/CH445/CH448 低阻模拟开关芯片数据手册
型号- CH445,CH448,CH444P,CH445P,CH440R,CH440P,CH448F,CH440,CH442E,CH444G,CH442,CH444,CH443K,CH443,CH440G
【产品】沁恒4x4矩阵的低阻模拟开关阵列芯片CH449,适用于数字I/O物理层路由和I/O扩展
CH449是国产沁恒推出的4x4矩阵的差分信号模拟开关芯片。CH449包含32只模拟开关,分为两组,分布于两个4x4信号通道矩阵的各个交叉点,每只模拟开关都可以独立的开启或者关闭,从而实现4x4差分信号通道的任意动态连接。
产品 发布时间 : 2022-08-30
沁恒(WCH)USB转串口芯片选型表&Pin To Pin对照表
目录- USB转单/多串口芯片 PinToPin替换型号总表 芯片参数表
型号- PL2303系列,FT232R,PL2303GL,CH9103M,CH343G,CH9143,FT230XQ,CH9102,CH9101,CP210X系列,CY7C65213,CH343K,FT230XS,CH347,CY7C65213系列,FT232RQ,CP2105,CP2104,CH9326,CP2109,CH341T,CP2102N-GQFN24,CP2102N-GQFN28,CH9104L,CH9342G,PL2303GC,CH9101系列,XR21B1422,CH342F,CH342K,CP2102,CH342,CP2101,CH344Q,CH340K,CH9101Y,PL2303HXD,CP210X,CH340N,CH9101N,CH340T,PL2303,CY7C65213(A),CH9101R,XR21V1414,CH9101U,CH9101H,CH341B,CH341A,CH341F,FT230X,FT232RL,CH343P,CH347T,CH9102X,CH9103,CH9340K,CH9340C,CH9344L,CH9102系列,CH340E,CH348L,CH340C,CH340B,CH348Q,CH344L,CH340G,CH9102F
电子商城
服务
使用FloTHERM和Smart CFD软件,提供前期热仿真模拟、结构设计调整建议、中期样品测试和后期生产供应的一站式服务,热仿真技术团队专业指导。
实验室地址: 深圳 提交需求>
针对电子系统中的详细传热和流体流动模拟进行优化,可准确分析复杂的两相冷却组件(如热管/均热板),量化利用率,并警告是否干涸。
实验室地址: 深圳 提交需求>
登录 | 立即注册
提交评论