 |
Electronic Components Datasheet Search |
|
|
Electronic Components Datasheet Search |
|
LT1396 Datasheet(PDF) 11 Page - Linear Technology |
|
||||||||||||||||||||||||||||||
LT1396 Datasheet(HTML) 11 Page - Linear Technology |
|
|
11 / 20 page  LT1395/LT1396/LT1397 11 139567fd operation, it is important to keep the EN pin at least 3V below the V+ supply. If a V+ of less than 3V is desired, and the amplifier will remain enabled at all times, then the EN pin should be tied to the V– supply. The enable pin current is approximately 30μA when activated. If using CMOS open-drain logic, an external 1k pull-up resistor is recommended to ensure that the LT1395CS6 remains disabled in spite of any CMOS drain leakage currents. The enable/disable times are very fast when driven from standard 5V CMOS logic. The LT1395CS6 enables in about 30ns (50% point to 50% point) while operating on ±5V supplies (Figure 2). Likewise, the disable time is approxi- mately 40ns (50% point to 50% point) (Figure 3). APPLICATIONS INFORMATION Figure 4. Buffered RGB to Color-Difference Matrix A2 1/4 LT1397 A3 1/4 LT1397 – + A1 1/4 LT1397 R7 255Ω R6 127Ω R5 255Ω R10 2320Ω R9 432Ω R11 82.5Ω R G B R12 90.9Ω R13 76.8Ω ALL RESISTORS 1% VS = ±5V R8 845Ω 75Ω SOURCES R1 255Ω R2 255Ω R4 255Ω R3 255Ω B-Y Y R-Y 1395/6/7 F04 A4 1/4 LT1397 Differential Input Signal Swing To avoid any breakdown condition on the input transis- tors, the differential input swing must be limited to ± 5V. In normal operation, the differential voltage between the input pins is small, so the ±5V limit is not an issue. Buffered RGB to Color-Difference Matrix An LT1397 can be used to create buffered color-difference signals from RGB inputs (Figure 4). In this application, the R input arrives via 75Ω coax. It is routed to the non- inverting input of LT1397 amplifier A1 and to a 845Ω resistor R8. There is also an 82.5Ω termination resistor R11, which yields a 75Ω input impedance at the R input when considered in parallel with R8. R8 connects to the inverting input of a second LT1397 amplifier (A2), which also sums the weighted G and B inputs to create a –0.5 • Y output. LT1397 amplifier A3 then takes the –0.5 • Y output and amplifies it by a gain of –2, resulting in the Y output. Amplifier A1 is configured in a noninvert- ing gain of 2 with the bottom of the gain resistor R2 tied to the Y output. The output of amplifier A1 thus results in the color-difference output R-Y. The B input is similar to the R input. It arrives via 75Ω coax, and is routed to the noninverting input of LT1397 amplifier A4, and to a 2320Ω resistor R10. There is also a 76.8Ω termination resistor R13, which yields a 75Ω VS = ±5V VIN = 1V RF = 255Ω RG = 255Ω RL = 100Ω 1395/6/7 F02 OUTPUT EN VS = ±5V VIN = 1V RF = 255Ω RG = 255Ω RL = 100Ω 1395/6/7 F03 OUTPUT EN Figure 2. Amplifier Enable Time, AV = 2 Figure 3. Amplifier Disable Time, AV = 2 |
Similar Part No. - LT1396_15 |
|
Similar Description - LT1396_15 |
|
|
|
Link URL |
| Privacy Policy |
| ALLDATASHEET.NET |
| Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | 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 |
English ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
