전자부품 데이터시트 검색엔진 |
|
ISL59311IRZ 데이터시트(PDF) 10 Page - Intersil Corporation |
|
ISL59311IRZ 데이터시트(HTML) 10 Page - Intersil Corporation |
10 / 14 page 10 FN6372.3 April 25, 2007 Operational Description and Application Information Introduction The ISL59311 is designed to differentially drive composite RGB video signals onto twisted pair lines, while simultaneously encoding horizontal and vertical sync signals as common mode output. The entire video signal plus sync can therefore be transmitted on 3 twisted pairs of wire. When utilizing CAT5 cable, the 4th available twisted pair can be used for transmission of audio, data or control information. The distribution of composite video over standard CAT5 cable enables enormous cost and labor savings compared with traditional coaxial cable, when considering both the relative low price and ease of pulling CAT5 cable. The digital block of the chip is a data transceiver which is intended to drive one twisted pair line. The maximum baudrate for this block is 50Mbps. Functional Description The ISL59311 provides three fully differential high-speed amplifiers, suitable for driving high-resolution composite video signals onto twisted pair or standard coaxial cable. The input common-mode range extends to the negative rail, allowing simple ground-referenced input termination to be used with a single supply. The amplifiers provide a fixed gain of +2 to compensate for standard video cable termination schemes. Horizontal and Vertical sync signals (HSYNC and VSYNC) are passed to an internal Logic Encoding Block to encode the sync information as three discrete signals of different voltage levels. Generally, in differential amplifiers an external VREF pin is used to control the common mode level of the differential output; in the case of the ISL59311 the VREF of each of the three internal amplifier channels receives a signal from the Logic Encoding Block with encoded HSYNC and VSYNC information. The final output consists of three fully differential video signals, with sync encoded on the common mode of each of the three RGB differential signals. HSYNC and VSYNC can easily be separated from the differential output signals, decoded and transmitted along with the RGB video signals to the video monitor. Sync Transmission The ISL59311 encodes HSYNC and VSYNC signals on the common mode output of the differential video signals; Red, Green and Blue respectively. Data Sheet Table 1 shows the common mode levels for the different SYNC input combinations. Note that the sum of the common mode voltages results in a fixed average DC level with no AC content. This dramatically reduces EMI radiation into any common mode signal along the twisted pairs of CAT5 cable. Extract Common Mode Sync and Decode HSYNC and VSYNC HSYNC and VSYNC can be regenerated from the Common Mode sync output voltages. The relationships between HSYNC, VSYNC and the 3 common mode levels are given by Table 1. The common mode levels are easily separated from the differential outputs of the ISL59311 using this simple resistor network at the cable receiver input of each differential channel; see Figure 20. FIGURE 17. PACKAGE POWER DISSIPATION vs AMBIENT TEMPERATURE FIGURE 18. PACKAGE POWER DISSIPATION vs AMBIENT TEMPERATURE Typical Performance Curves (Continued) JEDEC JESD51-7 HIGH EFFECTIVE THERMAL CONDUCTIVITY TEST BOARD - QFN EXPOSED DIEPAD SOLDERED TO PCB PER JESD51-5 3 2.5 2 1.5 1 0.5 0 0 255075 100 150 AMBIENT TEMPERATURE (°C) 2.857W 125 85 JEDEC JESD51-3 AND SEMI G42-88 (SINGLE LAYER) TEST BOARD 0.8 0.7 0.5 0.3 0.2 0.1 0 0 255075 100 150 AMBIENT TEMPERATURE (°C) 125 85 0.6 0.4 758mW TABLE 1. SYNC SIGNAL ENCODING HSYNC VSYNC COMMON MODE A (RED) COMMON MODE B (GREEN) COMMON MODE C (BLUE) Low High 3.0 2.0 2.5 Low Low 2.5 3.0 2.0 High Low 2.0 3.0 2.5 High High 2.5 2.0 3.0 ISL59311 |
유사한 부품 번호 - ISL59311IRZ |
|
유사한 설명 - ISL59311IRZ |
|
|
링크 URL |
개인정보취급방침 |
ALLDATASHEET.CO.KR |
ALLDATASHEET 가 귀하에 도움이 되셨나요? [ DONATE ] |
Alldatasheet는? | 광고문의 | 운영자에게 연락하기 | 개인정보취급방침 | 링크교환 | 제조사별 검색 All Rights Reserved©Alldatasheet.com |
Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
Family Site : ic2ic.com |
icmetro.com |