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LT6411 Datasheet, PDF (1/16 Pages) Linear Technology – 650MHz Differential ADC Driver/Dual Selectable Gain Amplifi er | |||
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FEATURES
â 650MHz â3dB Small-Signal Bandwidth
â 600MHz â3dB Large-Signal Bandwidth
â High Slew Rate: 3300V/µs
â Easily Conï¬gured for Single-Ended to Differential
Conversion
â 200MHz ±0.1dB Bandwidth
â User Selectable Gain of +1, +2 and â1
â No External Resistors Required
â 46.5dBm Equivalent OIP3 at 30MHz When Driving an
ADC
â IM3 with 2VP-P Composite, Differential Output:
â87dBc at 30MHz, â83dBc at 70MHz
â â77dB SFDR at 30MHz, 2VP-P Differential Output
â 6ns 0.1% Settling Time for 2V Step
â Low Supply Current: 8mA per Ampiï¬er
â Differential Gain of 0.02%, Differential Phase of 0.01°
â 50dB Channel Separation at 100MHz
â Wide Supply Range: ±2.25V (4.5V) to ±6.3V (12.6V)
â 3mm à 3mm 16-Pin QFN Package
APPLICATIONS
â Differential ADC Driver
â Single-Ended to Differential Conversion
â Differential Video Line Driver
LT6411
650MHz Differential ADC
Driver/Dual Selectable
Gain Ampliï¬er
DESCRIPTION
The LT®6411 is a dual ampliï¬er with individually selectable
gains of +1, +2 and â1. The ampliï¬ers have excellent dis-
tortion performance for driving ADCs as well as excellent
bandwidth and slew rate for video, data transmission and
other high speed applications. Single-ended to differential
conversion with a system gain of 2 is particularly straight-
forward by conï¬guring one ampliï¬er with a gain of +1
and the other ampliï¬er with a gain of â1. The LT6411 can
be used on split supplies as large as ±6V and on a single
supply as low as 4.5V.
Each ampliï¬er draws only 8mA of quiescent current when
enabled. When disabled, the output pins become high
impedance and each ampliï¬er draws less than 350µA.
The LT6411 is manufactured on Linear Technologyâs
proprietary, low voltage, complimentary, bipolar process
and is available in the ultra-compact, 3mm à 3mm, 16pin
QFN package.
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
TYPICAL APPLICATION
Differential ADC Driver
5V
VCC
LT6411
+
24â¦
1.9VDC
30MHz
INPUT
370â¦
370â¦
â
370â¦
370â¦
1.9VDC
â
24â¦
+
VEE
DGND
EN
AINâ
LTC2249
14-BIT ADC
AIN+ 80Msps
6411 TA01a
30MHz 2-Tone 32768 Point FFT, LT6411
Driving an LTC®2249 14-Bit ADC
0
â10 32768 POINT FFT
â20
TONE 1 AT 29.5MHz, â7dBFS
TONE 2 AT 30.5MHz, â7dBFS
â30 IM3 = â87dBc
â40
â50
â60
â70
â80
â90
â100
â110
â120
â130
â140
0 5 10 15 20 25 30
FREQUENCY (MHz)
35 40
6411 TA01b
6411f
1
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