전자부품 데이터시트 검색엔진 |
|
ISL59913IRZ-T7 데이터시트(PDF) 10 Page - Intersil Corporation |
|
ISL59913IRZ-T7 데이터시트(HTML) 10 Page - Intersil Corporation |
10 / 12 page 10 FN6406.0 December 15, 2006 Contrast By varying the voltage between pins VGAIN and VREF, the gain of the signal path can be changed in the ratio 4:1. The gain change varies almost linearly with control voltage. For normal operation it is anticipated the X2 mode will be selected and the output load will be back matched. A unity gain to the output load will then be achieved with a gain control voltage of about 0.35V. This allows the gain to be trimmed up or down by 6dB to compensate for any gain/loss errors that affect the contrast of the video signal. Figure 26 shows an example plot of the gain to the load with gain control voltage. C ommon Mode Sync Decoding The ISL59910 features common mode decoding to allow horizontal and vertical synchronization information, which has been encoded on the three differential inputs by the EL4543, to be decoded. The entire RGB video signal can therefore be transmitted, along with the associated synchronization information, by using just three twisted pairs. Decoding is based on the EL4543 encoding scheme, as described in Figure 26 and Table 1. The scheme is a three-level system, which has been designed such that the sum of the common mode voltages results in a fixed average DC level with no AC content. This eliminates the effect of EMI radiation into the common mode signals along the twisted pairs of the cable The common mode voltages are initially extracted by the ISL59910 from the three input pairs. These are then passed to an internal logic decoding block to provide Horizontal and Vertical sync output signals (HOUT and VOUT). Power Dissipation The ISL59910 and ISL59913 are designed to operate with ±5V supply voltages. The supply currents are tested in production and guaranteed to be less than 39mA per channel. Operating at ±5V power supply, the total power dissipation is: where: •PDMAX = Maximum power dissipation •VS = Supply voltage = 5V •IMAX = Maximum quiescent supply current per channel = 39mA •VOUTMAX = Maximum output voltage swing of the application = 2V RL = Load resistance = 150Ω Ω θ JA required for long term reliable operation can be calculated. This is done using Equation 3: 00.8 VGAIN 0.4 1 2 1.8 1.4 1 0.6 0.4 0.6 0.2 1.6 1.2 0.8 FIGURE 25. VARIATION OF GAIN WITH GAIN CONTROL VOLTAGE TABLE 1. H AND V SYNC DECODING RED CM GREEN CM BLUE CM HSYNC VSYNC Mid High Low Low Low High Low Mid Low High Low High Mid High Low Mid Low High High High NOTE: Level ‘Mid’ is halfway between ‘High’ and ‘Low’ TIME (0.5ms/DIV) BLUE CM OUT (CH A) GREEN CM OUT (CH B) RED CM OUT (CH C) VSYNC HSYNC FIGURE 26. H AND V SYNCS ENCODED PD MAX 32 V S × I SMAX V S ( - V OUTMAX ) V OUTMAX R L ---------------------------- × + × × = (EQ. 1) PD MAX 1.29W = (EQ. 2) ISL59910, ISL59913 |
유사한 부품 번호 - ISL59913IRZ-T7 |
|
유사한 설명 - ISL59913IRZ-T7 |
|
|
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 |