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LT6402-12 Datasheet, PDF (1/16 Pages) Linear Technology – 300MHz Low Distortion, Low Noise Differential Amplifi er/ ADC Driver (AV = 12dB) | |||
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FEATURES
n 300 MHz â3dB Bandwidth
n Fixed Gain of 12dB
n Low Distortion:
43dBm OIP3, â82dBc HD3 (20MHz, 2VP-P)
n Low Noise:
15dB NF, en = 2.6nV/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.
TYPICAL APPLICATION
0.1μF
0.1μF
0.1μF
IF IN
5V
0.1μF
âINB
VCC
âINA
VOCM
10Ω
+OUT
LT6402-12
10Ω
âOUT
+INB
+INA VEE
VCM
AIN+
LTC®2249
AINâ
64026 TA01a
LT6402-12
300MHz Low Distortion, Low
Noise Differential Ampliï¬er/
ADC Driver (AV = 12dB)
DESCRIPTION
The LT®6402-12 is a low distortion, low noise differential
ampliï¬er/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 unï¬ltered outputs
(+OUT and âOUT), the LT6402-12 has a built-in 75MHz
differential low pass ï¬lter and an additional pair of ï¬ltered
outputs (+OUTFILTERED, âOUTFILTERED) to reduce
external ï¬ltering 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.
The LT6402-12 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.
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
640212 TA01b
640212fa
1
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