Datasheet LTC6409 (Analog Devices)

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, 2VP-P
ferential amplifier. Its input common mode range includes 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/µs 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 Small 10-Lead 3mm × 2mm × 0.75mm QFN Package The LTC6409 is stable in a differential gain of 1. This 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 100µA. 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 –40°C n Time Domain Reflectometry to 125°C temperature range. n Communications Receivers L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Analog Devices, 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 fIN = 70MHz, –1dBFS,
1.3pF
fS = 150MHz, 4096-Point FFT
0 V V S = 3.3V IN 150Ω 150Ω –10 VOUTDIFF = 1.8VP-P 1.8V –20 HD2 = –86.5dBc HD3 = –89.4dBc 3.3V 39pF –30 SFDR = 81.6dB 33.2Ω 10Ω V –40 SNR = 71.1dB – + DD A + IN –50 VOCM = 0.9V LTC6409 LTC2262-14 ADC –60 33.2Ω 10Ω + – A – –70 IN GND –80 39pF AMPLITUDE (dBFS) 150Ω –90 –100 150Ω –110 6409 TA01 –120 0 10 20 30 40 50 60 70 1.3pF FREQUENCY (MHz) 6409 TA01b 6409fb For more information www.linear.com/LTC6409 1 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Applications Information Typical Applications Package Description Revision History Typical Applications Related Parts Features Applications Typical Application Description Absolute Maximum Ratings Order Information Electrical Characteristics Pin Configuration Typical Performance Characteristics Pin Functions Block Diagram Applications Information Typical Applications Package Description Revision History Typical Applications Related Parts