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LT1227 Datasheet(PDF) 1 Page - Linear Technology |
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LT1227 Datasheet(HTML) 1 Page - Linear Technology |
1 / 12 page 1 LT1227 APPLICATIO S DESCRIPTIO FEATURES TYPICAL APPLICATIO 140MHz Video Current Feedback Amplifier s 140MHz Bandwidth: AV = 2, RL = 150Ω s 1100V/ µs Slew Rate s Low Cost s 30mA Output Drive Current s 0.01% Differential Gain s 0.01 ° Differential Phase s High Input Impedance: 14M Ω, 3pF s Wide Supply Range: ±2V to ±15V s Shutdown Mode: IS < 250µA s Low Supply Current: IS = 10mA s Inputs Common Mode to Within 1.5V of Supplies s Outputs Swing Within 0.8V of Supplies The LT ®1227 is a current feedback amplifier with wide bandwidth and excellent video characteristics. The low differential gain and phase, wide bandwidth, and 30mA output drive current make the LT1227 well suited to drive cables in video systems. A shutdown feature switches the device into a high imped- ance, low current mode, allowing multiple devices to be connected in parallel and selected. Input to output isola- tion in shutdown is 70dB at 10MHz for input amplitudes up to 10VP-P. The shutdown pin interfaces to open collector or open drain logic and takes only 4 µs to enable or disable. The LT1227 comes in the industry standard pinout and can upgrade the performance of many older products. For a dual or quad version, see the LT1229/1230 data sheet. The LT1227 is manufactured on Linear Technology’s proprietary complementary bipolar process. Video Cable Driver Differential Gain and Phase vs Supply Voltage – + 75 Ω CABLE VOUT 75 Ω RG 1k LT1227 75 Ω VIN VOUT VIN = 1 1227 TA01 RF 1k s Video Amplifiers s Cable Drivers s RGB Amplifiers s Test Equipment Amplifiers s 50 Ω Buffers for Driving Mixers SUPPLY VOLTAGE ( ±V) 5 0.12 0.16 0.20 13 LT1227 • TA02 0.08 0.04 0 7 9 11 15 0.12 0.16 0.20 0.08 0.04 0 NTSC COMPOSITE f = 3.58MHz ∆φ ∆G , LTC and LT are registered trademarks of Linear Technology Corporation. |
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