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LT1809IS8 Datasheet(PDF) 8 Page - Linear Technology |
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LT1809IS8 Datasheet(HTML) 8 Page - Linear Technology |
8 / 8 page LT1809 8 Linear Technology Corporation 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408)432-1900 q FAX: (408) 434-0507 qwww.linear-tech.com ©LINEAR TECHNOLOGY CORPORATION 2000 1809i LT/TP 0100 4K • PRINTED IN USA RELATED PARTS TYPICAL APPLICATIO PART NUMBER DESCRIPTION COMMENTS LT1632/LT1633 Dual/Quad 45MHz, 45V/ µs Rail-to-Rail Input and Output Op Amps High DC Accuracy, 1.35mV VOS(MAX), 70mA Output Current, Max Supply Current 5.2mA per Amplifier LT1630/LT1631 Dual/Quad 30MHz, 10V/ µs Rail-to-Rail Input and Output Op Amps High DC Accuracy, 525 µV VOS(MAX), 70mA Output Current, Max Supply Current 4.4mA per Amplifier LT1215/LT1216 Dual/Quad 23MHz, 50V/ µs Single Supply Precision Op Amps Input Common Mode Includes Ground, 450 µV VOS(MAX), 6 µV/°C Max Drift, Max Supply Current 6.6mA per Amplifier Single Supply Video Line Driver The LT1809 is a wideband rail-to-rail op amp with high output current that allows it to drive video signals in low supply applications. Figure 1 depicts a single supply video line driver with AC coupling to minimize the quiescent power dissipation. Resistors R1 and R2 are used to level- shift the input and output to provide the largest signal swing. The gain of two is set up with R3 and R4 to restore the signal at VOUT which is attenuated by 6dB due to the matching of the 75 Ω line with the back-terminated resis- tor, R5. The back termination will eliminate any reflection of the signal that comes from the load. The input termina- tion resistor, RT, is optional—it is used only if matching of the incoming line is necessary. The values of C1, C2 and C3 are selected to minimize the droop of the luminance signal. In some less stringent requirements, the value of capacitors could be reduced. – + LT1809 VIN 1809 TA02 C1 33 µF C2 150 µF RT 75 Ω RLOAD 75 Ω VOUT R2 5k R3 1k R4 1k R1 5k 5V 2 3 6 7 4 R5 75 Ω 75 Ω COAX CABLE C3 1000 µF + Figure 1. Single Supply Video Line Driver |
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