LTC6409 10GHz GBW, 1.1nV/Hz Differential Amplifier/ADC Driver FEATURES DESCRIPTION n 10GHz Gain-Bandwidth Product The LTC 6409 is a very high speed, low distortion, dif- n 88dB SFDR at 100MHz, 2V ferential amplifier. Its input common mode range includes P-P n 1.1nV/Hz Input Noise Density ground, so that a ground-referenced input signal can be n Input Range Includes Ground DC-coupled, level-shifted, and converted to drive an ADC n External Resistors Set Gain (Min 1V/V) differentially. n 3300V/s Differential Slew Rate The gain and feedback resistors are external, so that the n 52mA Supply Current exact gain and frequency response can be tailored to each n 2.7V to 5.25V Supply Voltage Range application. For example, the amplifier could be externally n Fully Differential Input and Output compensated in a no-overshoot configuration, which is n Adjustable Output Common Mode Voltage desired in certain time-domain applications. n Low Power Shutdown n The LTC6409 is stable in a differential gain of 1. This Small 10-Lead 3mm 2mm 0.75mm QFN Package allows for a low output noise in applications where gain is not desired. It draws 52mA of supply current and has APPLICATIONS a hardware shutdown feature which reduces current con- n Differential Pipeline ADC Driver sumption to 100A. n High Speed Data-Acquisition Cards The LTC6409 is available in a compact 3mm 2mm n Automated Test Equipment 10-pin leadless QFN package and operates over a 40C n Time Domain Reflectometry to 125C temperature range. n Communications Receivers L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of AnalogDevices, Inc. All other trademarks are the property of their respective owners. TYPICAL APPLICATION DC-Coupled Interface from a Ground-Referenced Single-Ended LTC6409 Driving LTC2262-14 ADC, Input to an LTC2262-14 ADC f = 70MHz, 1dBFS, IN 1.3pF f = 150MHz, 4096-Point FFT S 0 V = 3.3V S V IN 10 V = 1.8V OUTDIFF P-P 150 150 HD2 = 86.5dBc 20 1.8V HD3 = 89.4dBc 3.3V 39pF 30 SFDR = 81.6dB 40 33.2 10 V SNR = 71.1dB DD + + A IN 50 60 V = 0.9V LTC2262-14 ADC OCM LTC6409 33.2 10 70 A + IN GND 80 39pF 90 150 100 150 110 6409 TA01 120 0 10 20 30 40 50 60 70 1.3pF FREQUENCY (MHz) 6409 TA01b 6409fb 1 For more information www.linear.com/LTC6409 AMPLITUDE (dBFS)LTC6409 ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION (Note 1) TOP VIEW + Total Supply Voltage (V V ) .................................5.5V Input Current (+IN, IN, V , SHDN) OCM 10 9 8 OUT 1 7 +OUT (Note 2) ................................................................ 10mA 11,V Output Short-Circuit Duration (Note 3) ............ Indefinite +IN 2 6 IN 3 4 5 Operating Temperature Range (Note 4) .................................................. 40C to 125C Specified Temperature Range UDB PACKAGE 10-LEAD (3mm 2mm) PLASTIC QFN (Note 5) .................................................. 40C to 125C T = 150C, = 138C/W, = 5.2C/W JMAX JA JC Maximum Junction Temperature .......................... 150C EXPOSED PAD (PIN 11) CONNECTED TO V Storage Temperature Range .................. 65C to 150C