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LT6402-12_15

Description
300MHz Low Distortion, Low Noise Differential Amplifier
File Size229KB,16 Pages
ManufacturerLinear ( ADI )
Websitehttp://www.analog.com/cn/index.html
Download Datasheet View All

LT6402-12_15 Overview

300MHz Low Distortion, Low Noise Differential Amplifier

FEATURES
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LT6402-12
300MHz Low Distortion, Low
Noise Differential Amplifier/
ADC Driver (A
V
= 12dB)
DESCRIPTION
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 V
OCM
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.
The LT6402-12 operates on a 5V supply and consumes 30mA.
It comes in a compact 16-lead 3mm
×
3mm QFN package
and operates over a –40°C to 85°C temperature range.
300 MHz –3dB Bandwidth
Fixed Gain of 12dB
Low Distortion:
43dBm OIP3, –82dBc HD3 (20MHz, 2V
P-P
)
Low Noise:
15dB NF e
n
= 2.6nV/√Hz (20MHz)
,
Differential Inputs and Outputs
Additional Filtered Outputs
Adjustable Output Common Mode Voltage
DC- or AC-Coupled Operation
Minimal Support Circuitry Required
Small 0.75mm Profile 16-Lead 3mm
×
3mm QFN
Package
APPLICATIONS
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Differential ADC Driver for:
Imaging
Communications
Differential Driver/Receiver
Single Ended to Differential Conversion
Differential to Single Ended Conversion
Level Shifting
IF Sampling Receivers
SAW Filter Interfacing/Buffering
L,
LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
TYPICAL APPLICATION
5V
0.1μF
0.1μF
–INB
–INA
0.1μF
0.1μF
IF IN
+INB
+INA
V
EE
64026 TA01a
Distortion vs Frequency, Differential Input, No R
LOAD
–40
–50
DISTORTION (dBc)
–60
–70
–80
HD3
–90
HD2
–100
1
10
FREQUENCY (MHz)
100
640212 TA01b
FILTERED OUTPUTS
V
OUT
= 2V
P-P
V
CC
V
OCM
+OUT
LT6402-12
–OUT
10Ω
10Ω
AIN
+
V
CM
LTC
®
2249
AIN
640212fa
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