Electronic Components Datasheet Search |
|
EL9110IU-T7 Datasheet(PDF) 7 Page - Intersil Corporation |
|
EL9110IU-T7 Datasheet(HTML) 7 Page - Intersil Corporation |
7 / 8 page 7 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 12 shows an example plot of the gain to the load with gain control voltage. FIGURE 12. VARIATION OF GAIN WITH GAIN CONTROL VOLTAGE Circuit and Layout Recommendation The interconnection cable is a transmission line therefore for proper function it should be treated like transmission line, a refection-free termination is necessary. A reflection-free termination is a real "ohmic" resistor with as less as possible reactive parasitic. The traces of the layout, up to the point where of the termination resistor placed, are part of the transmission line which also includes the cable's connector. A connector with a better controlled impedance is an obligation for good picture quality. The termination resistor should be placed close to the inputs of the device's pins (pin 3 and pin 4.) The small capacitance differential and common mode capacitance of the input pins of the device makes it possible to connect parallel to the termination resistor. The cable will work as an antenna for all the RF spectrum which is "in the air" where the cable is used. The spectrum, particularly its common mode components, could and will contain high energy level of transients which are above the built-in protection level of the device and easily could damage its inputs. Using a transient protection circuit according to the given application is recommended. Since the used signal's bandwidth is in the range of 100MHz, for layout and power supply bypassing the roles of RF design should be applied. The following picture is taken from the DB9110 demo- board's layout. For better visibility the ground plain is removed. The ground plane is shown in the following picture. FIGURE 13. DEMO BOARD LAYOUT The accompanying circuit diagram looks like: FIGURE 14. CIRCUIT DIAGRAM 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 1 2 3 4 16 15 14 13 5 6 7 12 11 10 8 9 CTRL _REF VCTRL VINP VINM VS- CMOUT VGAIN LOGIC _REF CMEXT VS+ ENBL VSA+ VOUT VSA- 0V X2 R11 330 Ω C5 1µF R6 R7 R9 R5 C10 1µF R12 330 Ω C9 1µF C8 1nF C11 1nF C7 1µF C6 1nF TP7 EL9110 |
Similar Part No. - EL9110IU-T7 |
|
Similar Description - EL9110IU-T7 |
|
|
Link URL |
Privacy Policy |
ALLDATASHEET.COM |
Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Datasheet Upload | Contact us | Privacy Policy | Link Exchange | Manufacturer List 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 |