LT1497 Dual 125mA, 50MHz Current Feedback Amplifier FEATURES DESCRIPTION n Minimum Output Current: 125mA The LT 1497 dual current feedback amplifier features low n Maximum Supply Current per Amp: 7mA, V = 5V power, high output drive, excellent video characteristics S n Bandwidth: 50MHz, V = 15V and outstanding distortion performance. From a low 7mA S n Slew Rate: 900V/s, V = 15V maximum supply current per amplifier, the LT1497 drives S n Wide Supply Range: V = 2.5V to 15V 100mA with only 1.9V of headroom. Twisted pairs can be S (Enhanced 16-Pin SO Package) driven differentially with 70dBc distortion up to 1MHz for JA n Enhanced SO-8 Package for 5V Operation 40mA peak signals. JA n 0.02% Differential Gain: A = 2, R = 150 V L The LT1497 is available in a low thermal resistance 16-pin n 0.015 Differential Phase: A = 2, R = 150 V L SO package for operation with supplies up to 15V. For n 13V Output Swing: I = 100mA, V = 15V L S 5V operation the device is also available in a low thermal n 3.1V Output Swing: I = 100mA, V = 5V L S resistance SO-8 package. The device has thermal and n 55ns Settling Time to 0.1%, 10V Step current limit circuits that protect against fault conditions. n Thermal Shutdown Protection The LT1497 is manufactured on Linear Technologys U complementary bipolar process. The device has charac- APPLICATIONS teristics that bridge the performance between the LT1229 and LT1207 dual current feedback amplifiers. The LT1229 n Twisted-Pair Drivers has 30mA output drive, 100MHz bandwidth and 12mA n Video Amplifiers supply current. The LT1207 has 250mA output drive, n Cable Drivers 60MHz bandwidth and 40mA supply current. n Test Equipment Amplifiers , LTC and LT are registered trademarks of Linear Technology Corporation. n Buffers TYPICAL APPLICATION HDSL2 Single Pair Line Driver 2nd and 3rd Harmonic Distortion of HDSL2 Single Pair Line Driver 560 40 V = 5V S V = 1.25V IN 560 V = 2.5V OUT 50 68.1 1/2 LT1497 + 60 V IN 1:1* 560 70 2ND 135 560 3RD 80 *MIDCOM 671-7807 68.1 1/2 LT1497 90 + 100k 1M 2M FREQUENCY (Hz) 1419 TA01 1497 TA02 1 DISTORTION (dBc) U ULT1497 ABSOLUTE MAXIMUM RATINGS + Total Supply Voltage (V to V ) Operating Temperature Range (Note 2) ... 40C to 85C LT1497CS8.......................................................... 14V Specified Temperature Range ...................... 0C to 70C LT1497CS............................................................ 36V Maximum Junction Temperature (See Below) ....... 150C Noninverting Input Current ................................... 2mA Storage Temperature Range .................. 65C to 150C Output Short-Circuit Duration (Note 1) .......... Continuous Lead Temperature (Soldering, 10 sec) ................... 300C PACKAGE/ORDER INFORMATION ORDER PART TOP VIEW ORDER PART NUMBER NUMBER V 1 16 V TOP VIEW NC 2 15 NC + LT1497CS8 LT1497CS 1 OUT A 8 V + OUT A 3 14 V IN A 2 7 OUT B IN A 4 13 OUT B A A +IN A 3 6 IN B +IN A 5 12 IN B B B V +IN B 4 5 V 6 11 +IN B S8 PART MARKING NC 7 10 NC S8 PACKAGE 8-LEAD PLASTIC SO V 8 9 V 1497 T = 150C, = 80C/ W (NOTE 3) JMAX JA S PACKAGE 16-LEAD PLASTIC SO T = 150C, = 40C/ W (NOTE 3) JMAX JA Consult factory for Industrial and Military grade parts. ELECTRICAL CHARACTERISTICS V = 0V, 2.5V V 15V (LT1497CS), 2.5V V 5V (LT1497CS8), pulse tested unless otherwise noted. CM S S SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS V Input Offset Voltage T = 25C 3 10 mV OS A l 15 mV Input Offset Voltage Matching T = 25C 1 3.5 mV A l 5.0 mV Input Offset Voltage Drift l 10 V/C + I Noninverting Input Current T = 25C 1 3 A IN A l 10 A Noninverting Input Current Matching T = 25C 0.3 1.0 A A l 1.5 A I Inverting Input Current T = 25C 7 20 A IN A l 40 A Inverting Input Current Matching T = 25C 3 10 A A l 15 A e Input Noise Voltage Density f = 1kHz, R = 1k, R = 10, R = 0 3 nV/Hz n F G S +i Noninverting Input Noise Current Density f = 1kHz, R = 1k, R = 10, R = 10k 2 pA/Hz n F G S i Inverting Input Noise Current Density f = 1kHz, R = 1k, R = 10, R = 10k 20 pA/Hz n F G S R Input Resistance V = 13V, V = 15V l 1.5 10 M IN IN S V = 3V, V = 5V l 1.5 8 M IN S V = 0.5V, V = 2.5V l 1.5 8 M IN S C Input Capacitance 3pF IN 2 U W U W U WW