LT1253/LT1254 Low Cost Dual and Quad Video Amplifiers DESCRIPTIO FEATURES n Low Cost The LT1253 is a low cost dual current feedback amplifier n Current Feedback Amplifiers for video applications. The LT1254 is a quad version of the n Differential Gain: 0.03%, R = 150, V = 5V LT1253. The amplifiers are completely isolated except for L S n Differential Phase: 0.28, R = 150, V = 5V the power supply pins and therefore have excellent isola- L S n Flat to 30MHz, 0.1dB tion, over 94dB at 5MHz. Dual and quad amplifiers signifi- n 90MHz Bandwidth on 5V cantly reduce costs compared with singles the number of n Wide Supply Range: 2V(4V) to 14V(28V) insertions is reduced and fewer supply bypass capacitors n Low Power: 60mW per Amplifier at 5V are required. In addition, these duals and quads cost less per amplifier than single video amplifiers. The LT1253/LT1254 amplifiers are ideal for driving low APPLICATI S impedance loads such as cables and filters. The wide n RGB Cable Drivers bandwidth and high slew rate of these amplifiers make n Composite Video Cable Drivers driving RGB signals between PCs and workstations easy. n Gain Blocks in IF Stages The excellent linearity of these amplifiers makes them ideal for composite video. The LT1253 is available in 8-pin DIPs and the S8 surface mount package. The LT1254 is available in 14-pin DIPs and the S14 surface mount package. Both parts have the industry standard dual and quad op amp pin out. For higher performance, see the LT1229/LT1230. TYPICAL APPLICATI Transient Response 5V + V IN 75 1/2 LT1253 75 CABLE 5V R F 620 V OUT R G 75 620 LT1253/54 TA02 R F A = 1 + BW = 90MHz V V = 5V S R G A = 2 V AT AMPLIFIER OUTPUT. R = 150 L 6dB LESS AT V . OUT V = 1V LT1253/54 TA01 O 1 O U UO ULT1253/LT1254 ABSOLUTEXAI U RATI GS + Total Supply Voltage (V to V ) ............................. 28V Storage Temperature Range ................ 65C to 150C Input Current ..................................................... 15mA Junction Temperature (Note 2)............................ 150C Output Short-Circuit Duration (Note 1) ........ Continuous Lead Temperature (Soldering, 10 sec)................. 300C Operating Temperature Range LT1253C, LT1254C................................. 0C to 70C /O PACKAGE RDER I FOR ATIO TOP VIEW ORDER PART ORDER PART OUT A 1 14 OUT D NUMBER NUMBER TOP VIEW IN A 2 13 IN D + OUT A 1 8 V A D +IN A 3 12 +IN D LT1253CN8 7 IN A 2 OUT B LT1254CN + A V 4 11 V LT1253CS8 +IN A 3 6 IN B LT1254CS +IN B 5 10 B +IN C +IN B B C V 4 5 IN B 6 9 IN C N8 PACKAGE S8 PACKAGE OUT B 7 8 OUT C S8 PART MARKING 8-LEAD PLASTIC DIP 8-LEAD PLASTIC SOIC N PACKAGE S PACKAGE T = 150C, = 100C/ W (N) JMAX JA 14-LEAD PLASTIC DIP 14-LEAD PLASTIC SOIC T = 150C, = 150C/ W (S) 1253 JMAX JA T = 150C, = 70C/ W (N) JMAX JA T = 150C, = 100C/ W (S) JMAX JA ELECTRICAL CHARACTERISTICS 0C T 70C, V = 5V to 12V, unless otherwise noted. A S Symbol Parameter CONDITIONS MIN TYP MAX UNITS V Input Offset Voltage 515 mV OS +I Noninverting Bias Current 115 A B I Inverting Bias Current 20 100 A B A Large-Signal Voltage Gain V = 5V, V = 2V, R = 150 560 1500 V/V VOL S O L PSRR Power Supply Rejection Ratio V = 3V to 12V 60 70 dB S CMRR Common-Mode Rejection Ratio V = 5V, V = 2V 55 65 dB S CM V Maximum Output Voltage Swing V = 12V, R = 5007.0 10.5 V OUT S L V = 5V, R = 1502.5 3.7 V S L I Maximum Output Current 30 55 mA OUT I Supply Current Per Amplifier 6 11 mA S R Input Resistance 110 M IN C Input Capacitance 3pF IN Power Supply Range Dual 2 12 V Single 4 24 V Channel Separation f = 10MHz 88 dB SR Input Slew Rate A = 1 125 V/s V Output Slew Rate A = 2 250 V/s V 2 U WU U W W W