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LTC6604IUFF-15-TRPBF

Description
Dual Very Low Noise, Differential Amplifi er and 15MHz Lowpass Filter
File Size201KB,16 Pages
ManufacturerLinear ( ADI )
Websitehttp://www.analog.com/cn/index.html
Download Datasheet View All

LTC6604IUFF-15-TRPBF Overview

Dual Very Low Noise, Differential Amplifi er and 15MHz Lowpass Filter

FEATURES
n
LT6604-15
Dual Very Low Noise,
Differential Amplifier and
15MHz Lowpass Filter
DESCRIPTION
The LT
®
6604-15 consists of two matched, fully differential
amplifiers, each with a 4th order, 15MHz 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 76dB. 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 LT6604-15 enables level
shifting by providing an adjustable output common mode
voltage, making it ideal for directly interfacing to ADCs.
The LT6604-15 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 15MHz Lowpass
Filters
4th Order Filters
Approximates Chebyshev Response
Guaranteed Phase and Gain Matching
Resistor-Programmable Differential Gain
76dB Signal-to-Noise (3V Supply, 2V
P-P
Output)
Low Distortion, 2V
P-P
, 800Ω Load, V
S
= 3V
1MHz: 86dBc 2nd, 90dBc 3rd
10MHz: 63dBc 2nd, 69dBc 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
LT6604-15
0.01μF
V
+
A
3V
50Ω
50Ω
18pF
LTC22xx
DUAL ADC
Channel to Channel Gain Matching
50 TYPICAL UNITS
14 T
A
= 25°C
GAIN = 1
f = 15MHz
12
IN
10
8
16
+
536Ω
+INA
V
MIDA
V
OCMA
+
+
–OUTA
+OUTA
V
+
+
AIN
DOUT
0.01μF
536Ω
–INA
+
+
536Ω
V
B
+INB
V
MIDB
V
OCMB
3V
50Ω
50Ω
18pF
6
+
V
–OUTB
+OUTB
+
AIN
DOUT
4
2
0
660415 TA01
536Ω
–INB
–0.25 –0.2–0. 5 –0.1–0.05 0 0.05 0.1 0.15 0.2 0.25
1
GAIN MATCH (dB)
660415 TA01b
660415fa
1
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Datasheet   0 1 2 3 4 5 6 7 8 9 A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
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