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LT6402-6 Datasheet, PDF (1/16 Pages) Linear Technology – 300MHz Low Distortion, Low Noise Differential Amplifi er/ ADC Driver (AV = 6dB) | |||
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FEATURES
n 300 MHz â3dB Bandwidth
n Fixed Gain of 6dB
n Low Distortion:
49dBm OIP3, â85dBc HD3 (20MHz, 2VP-P)
n Low Noise:
18.6dB NF, en = 3.8nV/âHz (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 Proï¬le 16-Lead 3mm à 3mm QFN
Package
APPLICATIONS
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
L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
LT6402-6
300MHz Low Distortion, Low
Noise Differential Ampliï¬er/
ADC Driver (AV = 6dB)
DESCRIPTION
The LT®6402-6 is a low distortion, low noise differential
ampliï¬er/ADC driver for use in applications from DC to
300MHz. The LT6402-6 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 LT6402-6 an
excellent solution for driving high speed 12-bit and 14-bit
ADCs. In addition to the normal unï¬ltered outputs (+OUT
and âOUT), the LT6402-6 has a built-in 75MHz differential
low pass ï¬lter and an additional pair of ï¬ltered outputs
(+OUTFILTERED, âOUTFILTERED) to reduce external ï¬l-
tering 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 LT6402-6 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 requir-
ing differential drive. The LT6402-6 can be used in data
acquisition systems required to function at frequencies
down to DC.
The LT6402-6 operates on a 5V supply and consumes 30mA.
It comes in a compact 16-lead 3mm à 3mm QFN package
and operates over a â40°C to 85°C temperature range.
TYPICAL APPLICATION
0.1μF
0.1μF
0.1μF
IF IN
5V
âINB
VCC
âINA
VOCM
+OUT
LT6402-6
+INB
VEE
+INA
âOUT
0.1μF
10Ω
10Ω
VCM
AIN+
LTC®2249
AINâ
64026 TA01a
Distortion vs Frequency, Differential Input, No RLOAD
â40
FILTERED OUTPUTS
VOUT = 2VP-P
â50
â60
â70
â80
â90
â100
1
HD3
HD2
10
FREQUENCY (MHz)
100
64026 TA01b
64026fa
1
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