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LTC6401CUD-8 Datasheet(PDF) 1 Page - Linear Integrated Systems

Part No. LTC6401CUD-8
Description  2GHz Low Noise, Low Distortion Differential ADC Driver for DC-140MHz
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Maker  LINEAR [Linear Integrated Systems]
Homepage  http://www.linearsystems.com
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LTC6401CUD-8 Datasheet(HTML) 1 Page - Linear Integrated Systems

 
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LTC6401-14
1
640114f
TYPICAL APPLICATION
FEATURES
APPLICATIONS
DESCRIPTION
2GHz Low Noise, Low
Distortion Differential ADC
Driver for DC-140MHz
The LTC®6401-14 is a high-speed differential amplifier
targeted at processing signals from DC to 140MHz. 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 LTC6401-14 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 ca-
pacitors in many applications. The gain is internally fixed
at 14dB (5V/V).
The LTC6401-14 saves space and power compared to
alternative solutions using IF gain blocks and transform-
ers. The LTC6401-14 is packaged in a compact 16-lead
3mm × 3mm QFN package and operates over the –40°C
to 85°C temperature range.
Equivalent Output IP3 vs Frequency
2GHz –3dB Bandwidth
Fixed Gain of 5V/V (14dB)
–91dBc IMD3 at 70MHz (Equivalent OIP3 = 49.3dBm)
–81dBc IMD3 at 140MHz (Equivalent OIP3 = 44.5dBm)
1.1nV/√⎯H⎯z Internal Op Amp Noise
7.3dB Noise Figure
Differential Inputs and Outputs
200Ω Input Impedance
2.85V to 3.5V Supply Voltage
45mA Supply Current (135mW)
1V to 1.6V Output Common Mode, Adjustable
DC- or AC-Coupled Operation
Max Differential Output Swing 4.6VP-P
Small 16-Lead 3mm × 3mm × 0.75mm QFN Package
Differential ADC Driver
Differential Driver/Receiver
Single Ended to Differential Conversion
IF Sampling Receivers
SAW Filter Interfacing
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
R2
29
Ω
R1
68.5
Ω
C4
0.1
μF
C3
0.1
μF
640114 TA01a
LTC6401-14
LTC2208
RS1
15
Ω
C2
0.1
μF
VIN
C1
1000pF
3.3V
3.3V
RS2
15
Ω
RS3
10
Ω
RS4
10
Ω
R3
100
Ω
VOCM
C5
0.1
μF
1.25V
CF2
33pF
COILCRAFT
0603CS
CF1
33pF
L1
24nH
CF3
33pF
V+
–IN
+IN
+OUT
–OUT
V–
AIN+
AIN
VCM
VDD
LTC2208
130Msps
16-Bit ADC
0
100 120 140 160 180
20 40 60 80
200
FREQUENCY (MHz)
60
50
40
20
10
30
0
640114 TA01b
(NOTE 7)


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