DIFFERENTIAL GAIN (%) LT1227 140MHz Video Current Feedback Amplifier FEATURES DESCRIPTIO n 140MHz Bandwidth: A = 2, R = 150W The LT 1227 is a current feedback amplifier with wide V L n 1100V/m s Slew Rate bandwidth and excellent video characteristics. The low n Low Cost differential gain and phase, wide bandwidth, and 30mA n 30mA Output Drive Current output drive current make the LT1227 well suited to drive n 0.01% Differential Gain cables in video systems. n 0.01 Differential Phase A shutdown feature switches the device into a high imped- n High Input Impedance: 14MW , 3pF ance, low current mode, allowing multiple devices to be n Wide Supply Range: 2V to 15V connected in parallel and selected. Input to output isola- n Shutdown Mode: I < 250m A S tion in shutdown is 70dB at 10MHz for input amplitudes up n Low Supply Current: I = 10mA S to 10V . The shutdown pin interfaces to open collector P-P n Inputs Common Mode to Within 1.5V of Supplies or open drain logic and takes only 4m s to enable or disable. n Outputs Swing Within 0.8V of Supplies The LT1227 comes in the industry standard pinout and U can upgrade the performance of many older products. For APPLICATIO S a dual or quad version, see the LT1229/1230 data sheet. n Video Amplifiers The LT1227 is manufactured on Linear Technologys n Cable Drivers proprietary complementary bipolar process. n RGB Amplifiers n Test Equipment Amplifiers , LTC and LT are registered trademarks of Linear Technology Corporation. n 50W Buffers for Driving Mixers TYPICAL APPLICATIO Video Cable Driver Differential Gain and Phase vs Supply Voltage 0.20 0.20 V NTSC COMPOSITE IN + 75W f = 3.58MHz LT1227 0.16 0.16 75W R F CABLE 0.12 0.12 1k V OUT 0.08 0.08 R G 75W V OUT 1k = 1 Df V IN 0.04 0.04 1227 TA01 D G 0 0 5 7 9 11 13 15 SUPPLY VOLTAGE ( V) LT1227 TA02 1 DIFFERENTIAL PHASE (DEG) U ULT1227 AB OLUEXAI U RAT GS S T I PACKAGE/ORDER I FOR ATIO (Note 1) ORDER PART Supply Voltage ..................................................... 18V TOP VIEW NUMBER Input Current ...................................................... 15mA NULL 1 8 SHDN Output Short Circuit Duration (Note 2) ........ Continuous + 2 7 LT1227CN8 IN V Operating Temperature Range +IN 3 6 OUT LT1227C .................................................. 0 C to 70 C V45 NULL LT1227M (OBSOLETE) .................... 55 C to 125 C N8 PACKAGE Storage Temperature Range ................. 65 C to 150 C 8-LEAD PLASTIC DIP T = 150 C, q = 100 C/W (N) JMAX JA Junction Temperature J8 PACKAGE Plastic Package ................................................ 150 C 8-LEAD CERAMIC DIP LT1227MJ8 T = 175 C, q = 100 C/W (J) JMAX JA Ceramic Package (OBSOLETE) ........................ 175 C Lead Temperature (Soldering, 10 sec.)................ 300 C OBSOLETE PACKAGE Consider the N8 Package for Alternate Source. TOP VIEW ORDER PART NUMBER NULL 1 8 SHDN + 2 7 IN V LT1227CS8 +IN 3 6 OUT V45 NULL S8 PART MARKING S8 PACKAGE 8-LEAD PLASTIC SO 1227 T = 150 C, q = 150 C/W JMAX JA Consult LTC Marketing for parts specified with wider operating temperature ranges. ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at T = 25 C. V = 0, 5V V 15V, pulse tested, unless otherwise noted. A CM S SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS V Input Offset Voltage T = 25 C 3 10 mV OS A l 15 mV Input Offset Voltage Drift l 10 m V/ C I + Noninverting Input Current T = 25 C 0.3 3 m A IN A l 10 m A I Inverting Input Current T = 25 C 10 60 m A IN A l 100 m A e Input Noise Voltage Density f = 1kHz, R = 1k, R = 10W , R = 0W 3.2 nV/ Hz n F G S +i Noninverting Input Noise Current Density f = 1kHz 1.7 pA/ Hz n i Inverting Input Noise Current Density f = 1kHz 32 pA/ Hz n R Input Resistance V = 13V, V = 15V l 1.5 14 MW IN IN S V = 3V, V = 5V l 1.5 11 MW IN S C Input Capacitance 3pF IN Input Voltage Range V = 15V, T = 25 C 13 13.5 V S A l 12 V V = 5V, T = 25 C 3 3.5 V S A l 2V CMRR Common Mode Rejection Ratio V = 15V, V = 13V, T = 25 C5562 dB S CM A V = 15V, V = 12V l 55 dB S CM V = 5V, V = 3V, T = 25 C5561 dB S CM A V = 5V, V = 2V l 55 dB S CM 2 U WU U W W W