LTC6419 Dual 10GHz GBW, 1.1nV/Hz Differential Amplifier/ADC Driver FEATURES DESCRIPTION n 10GHz Gain-Bandwidth Product The LTC 6419 is a dual very high speed, low distortion, n 85dB SFDR at 100MHz, 2V differential amplifier. Its input common mode range in- P-P n 1.1nV/Hz Input Noise Density cludes ground, so that a ground-referenced single-ended n Channel Separation 95dB at 100MHz or differential input signal can be DC-coupled, level-shifted, n Input Range Includes Ground and converted to drive an ADC differentially. n External Resistors Set Gain (Min 1V/V) The gain and feedback resistors are external, so that the n 3300V/s Differential Slew Rate exact gain and frequency response can be tailored to each n 52mA Supply Current (Per Amplifier) application. For example, the amplifier could be externally n 2.7V to 5.25V Supply Voltage Range compensated in a no-overshoot configuration, which is n Fully Differential Input and Output desired in certain time-domain applications. n Adjustable Output Common Mode Voltage n The LTC6419 is stable in a differential gain of 1. This al- Low Power Shutdown n lows for low output noise in applications where gain is not Small 20-Lead 4mm 3mm 0.75mm LQFN Package desired. Each amplifier draws 52mA of supply current and has an independent shutdown pin which reduces current APPLICATIONS consumption to 100A per amplifier. n Broadband I/Q Amplifiers The LTC6419 is available in a compact 4mm 3mm n Dual Differential ADC Driver 20-pin LQFN package and operates over a 40C to 125C n High-Speed Data-Acquisition Cards temperature range. n Automated Test Equipment L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Analog n Time Domain Reflectometry Devices, Inc. All other trademarks are the property of their respective owners. n Communications Receivers TYPICAL APPLICATION DC-Coupled Interface from a Ground-Referenced Single-Ended 1/2 LTC6419 Driving 1/4 LTC2175-14 Input to an LTC2175-14 ADC ADC, f = 45MHz, 1dBFS, IN 1.3pF f = 125MHz, 32768-Point FFT S 0 V = 3.3V S V IN 10 V = 1.8V 150 150 OUTDIFF P-P HD2 = 86.8dBc 20 1.8V HD3 = 86.5dBc 3.3V 39pF 30 SFDR = 86.5dB 33.2 10 V 40 DD SNR = 71.8dB + + A IN 50 V = 0.9V 1/4 LTC2175-14 ADC OCM 1/2 LTC6419 60 33.2 10 70 A + IN GND 80 39pF 90 150 100 150 110 6419 TA01 120 0 10 20 30 40 50 60 1.3pF FREQUENCY (MHz) 6419 TA01b 6419fa 1 For more information www.linear.com/LTC6419 AMPLITUDE (dBFS)LTC6419 ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION (Note 1) TOP VIEW + + Total Supply Voltage (V A V ), (V B V ) ............5.5V Input Current (+INA, INA, +INB, INB, V , V , SHDNA, SHDNB) (Note 2) ........... 10mA OCMA OCMB 20 19 18 17 Output Current (Note 13) ................................ 50mA RMS INA 1 16 +OUTA Output Short-Circuit Duration + +FBA 2 21 21 15 V A (Note 3) ...............................................Thermally Limited V V SHDNA 3 14 V Temperature Range (Notes 4, 5) SHDNB 4 13 V LTC6419I .............................................40C to 85C 21 21 + +FBB 5 12 V B V V LTC6419H .......................................... 40C to 125C INB 6 11 +OUTB Maximum Junction Temperature .......................... 150C Storage Temperature Range .................. 65C to 150C 7 8 9 10 Maximum Reflow (Package Body) Temperature .....260C LQFN PACKAGE 20-LEAD (4mm 3mm 0.75mm) T = 150C, = 44C/W, = 12C/W JMAX JA JC EXPOSED PADS (PIN 21) CONNECTED TO V