LT6402-12 datasheet(1/16 Pages) LINER

Part #	LT6402-12

Description	300MHz Low Distortion, Low Noise Differential Amplifi er/ ADC Driver (AV = 12dB)

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640212fa

LT6402-12

300MHz Low Distortion, Low

Noise Differential Ampliﬁer/

ADC Driver (AV = 12dB)

The LT®6402-12 is a low distortion, low noise differential

ampliﬁer/ADC driver for use in applications from DC to

300MHz. The LT6402-12 has been designed for ease of

use, with minimal support circuitry required. Exceptionally

low input-referred noise and low distortion (with either

single-ended or differential inputs) make the LT6402-12

an excellent solution for driving high speed 12-bit and

14-bit ADCs. In addition to the normal unﬁltered outputs

(+OUT and –OUT), the LT6402-12 has a built-in 75MHz

differential low pass ﬁlter and an additional pair of ﬁltered

outputs (+OUTFILTERED, –OUTFILTERED) to reduce

external ﬁltering components when driving high speed

ADCs. The output common mode voltage is easily set via

the VOCM pin, eliminating an output transformer or AC-

coupling capacitors in many applications.

The LT6402-12 is designed to meet the demanding require-

ments of communications transceiver applications. It can

be used as a differential ADC driver, a general-purpose

differential gain block, or in other applications requiring

differential drive. The LT6402-12 can be used in data

acquisition systems required to function at frequencies

down to DC.

TheLT6402-12operatesona5Vsupplyandconsumes30mA.

It comes in a compact 16-lead 3mm × 3mm QFN package

and operates over a –40°C to 85°C temperature range.

n Differential ADC Driver for:

Imaging

Communications

n Differential Driver/Receiver

n Single Ended to Differential Conversion

n Differential to Single Ended Conversion

n Level Shifting

n IF Sampling Receivers

n SAW Filter Interfacing/Buffering

n 300 MHz –3dB Bandwidth

n Fixed Gain of 12dB

n Low Distortion:

43dBm OIP3, –82dBc HD3 (20MHz, 2VP-P)

n Low Noise:

15dB NF, en = 2.6nV/√Hz (20MHz)

n Differential Inputs and Outputs

n Additional Filtered Outputs

n Adjustable Output Common Mode Voltage

n DC- or AC-Coupled Operation

n Minimal Support Circuitry Required

n Small 0.75mm Proﬁle 16-Lead 3mm × 3mm QFN

Package

Distortion vs Frequency, Differential Input, No RLOAD

TYPICAL APPLICATION

FEATURES

APPLICATIONS

DESCRIPTION

L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.

All other trademarks are the property of their respective owners.

64026 TA01a

IF IN

LT6402-12

–INA

–INB

VOCM

VCC

5V

VEE

+INB

+INA

10Ω

LTC

®2249

0.1μF

+OUT

–OUT

AIN+

AIN–

VCM

FREQUENCY (MHz)

1

–100

–90

–80

–70

–60

–40

10

100

640212 TA01b

–50

FILTERED OUTPUTS

VOUT = 2VP-P

HD3

HD2

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