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LT6604-10

产品描述Dual Very Low Noise, Differential Amplifi er and 10MHz Lowpass Filter
文件大小205KB,共16页
制造商Linear ( ADI )
官网地址http://www.analog.com/cn/index.html
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LT6604-10概述

Dual Very Low Noise, Differential Amplifi er and 10MHz Lowpass Filter

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FEATURES
n
LT6604-10
Dual Very Low Noise,
Differential Amplifier and
10MHz Lowpass Filter
DESCRIPTION
The LT
®
6604-10 consists of two matched, fully differential
amplifiers, each with a 4th order, 10MHz lowpass filter. The
fixed frequency lowpass filter approximates a Chebyshev
response. By integrating a filter and a differential ampli-
fier, distortion and noise are made exceptionally low. At
unity gain, the measured in band signal-to-noise ratio is
an impressive 82dB. At higher gains, the input referred
noise decreases, allowing the part to process smaller
input differential signals without significantly degrading
the signal-to-noise ratio.
Gain and phase are highly matched between the two chan-
nels. Gain for each channel is independently programmed
using two external resistors. The LT6604-10 enables level
shifting by providing an adjustable output common mode
voltage, making it ideal for directly interfacing to ADCs.
The LT6604-10 is fully specified for 3V operation. The
differential design enables outstanding performance at
a 2V
P-P
signal level for a single 3V supply. See the back
page of this datasheet for a complete list of related single
and dual differential amplifiers with integrated 2.5MHz to
20MHz lowpass filters.
L,
LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
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Dual Differential Amplifier with 10MHz Lowpass
Filters
4th Order Filters
Approximates Chebyshev Response
Guaranteed Phase and Gain Matching
Resistor-Programmable Differential Gain
82dB Signal-to-Noise (3V Supply, 2V
P-P
Output)
Low Distortion, 2V
P-P
, 800Ω Load
1MHz: 88dBc 2nd, 97dBc 3rd
5MHz: 74dBc 2nd, 77dBc 3rd
Specified for Operation with 3V, 5V and ±5V Supplies
Fully Differential Inputs and Outputs
Adjustable Output Common Mode Voltage
Small 4mm × 7mm × 0.75mm QFN Package
APPLICATIONS
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Dual Differential ADC Driver Plus Filter
Single-Ended to Differential Converter
Matched, Dual, Differential Filter Stage
Common Mode Translation of Differential Signals
High Speed ADC Antialiasing and DAC Smoothing in
Wireless Infrastructure or Networking Applications
High Speed Test and Measurement Equipment
Medical Imaging
TYPICAL APPLICATION
3V
LT6604-10
0.01μF
V
+
A
3V
50Ω
50Ω
18pF
LTC22xx
DUAL ADC
Channel to Channel Gain Matching, V
S
= 5V
20
50 TYPICAL UNITS
18 T
A
= 25°C
GAIN = 1
16 f = 10MHz
IN
14
12
10
8
+
402Ω
+INA
V
MIDA
V
OCMA
+
+
–OUTA
+OUTA
V
+
B
+
AIN
DOUT
0.01μF
402Ω
–INA
+
+
402Ω
3V
50Ω
50Ω
18pF
+INB
V
MIDB
V
OCMB
+
V
–OUTB
+OUTB
+
AIN
DOUT
6
4
2
0
660410 TA01
402Ω
–INB
–0.25 –0.2–0.15 –0.1–0.05 0 0.05 0.1 0.15 0.2 0.25
GAIN MATCH (dB)
660410 TA01b
660410fa
1

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