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LTC6400-14

Part Number	LTC6400-14
Manufacturer	Linear Technology
Description	Low Distortion Differential ADC Driver
Published	Jul 11, 2009
Detailed Description	www.DataSheet4U.com LTC6400-14 2.4GHz Low Noise, Low Distortion Differential ADC Driver for 300MHz IF DESCRIPTION The L...
Datasheet	LTC6400-14 PDF File

Overview

www.
DataSheet4U.
com LTC6400-14 2.
4GHz Low Noise, Low Distortion Differential ADC Driver for 300MHz IF DESCRIPTION The LTC®6400-14 is a high-speed differential ampliﬁer targeted at processing signals from DC to 300MHz.
The part has been speciﬁcally designed to drive 12-, 14- and 16-bit ADCs with low noise and low distortion, but can also be used as a general-purpose broadband gain block.
The LTC6400-14 is easy to use, with minimal support circuitry required.
The output common mode voltage is set using an external pin, independent of the inputs, which eliminates the need for transformers or AC-coupling capacitors in many applications.
The gain is internally ﬁxed at 14dB (5V/V).
The LTC6400-14 saves space and power compared to alternative solutions using IF gain blocks and transformers.
The LTC6400-14 is packaged in a compact 16-lead 3mm × 3mm QFN package and operates over the – 40°C to 85°C temperature range.
L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
FEATURES n n n n n n n n n n n n n n n 2.
4GHz –3dB Bandwidth Fixed Gain of 5V/V (14dB) –97dBc IMD3 at 70MHz (Equivalent OIP3 = 52.
4dBm) –66dBc IMD3 at 300MHz (Equivalent OIP3 = 36.
9dBm) 1.
1nV/√Hz Internal Op Amp Noise 2.
5nV/√Hz Total Input Noise 7.
5dB Noise Figure Differential Inputs and Outputs 200Ω Input Impedance 2.
85V to 3.
5V Supply Voltage 85mA Supply Current (255mW) 1V to 1.
6V Output Common Mode Voltage, Adjustable DC- or AC-Coupled Operation Max Differential Output Swing 4.
8VP-P Small 16-Lead 3mm × 3mm × 0.
75mm QFN Package APPLICATIONS n n n n n Differential ADC Driver Differential Driver/Receiver Single Ended to Differential Conversion IF Sampling Receivers SAW Filter Interfacing TYPICAL APPLICATION Single-Ended to Differential ADC Driver 3.
3V 3.
3V 70 60 OUTPUT IP3 (dBm) C2 0.
1μF C1 1000pF C3 0.
1μF VIN R1 68.
5Ω C4 0.
1μF –IN R2 29Ω V– 1.
25V C5 0.
1μF R3 100Ω V+ +IN +OUT LTC6400-14 –OUT VOCM L1 RS2 24nH 15Ω CO...

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