LT6604CUFF-5-PBF LINER [Linear Technology], LT6604CUFF-5-PBF Datasheet
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LT6604CUFF-5-PBF
Manufacturer Part Number
LT6604CUFF-5-PBF
Description
Dual Very Low Noise, Differential Amplifi er and 5MHz Lowpass Filter
Manufacturer
LINER [Linear Technology]
Datasheet
1.LT6604CUFF-5-PBF.pdf
(16 pages)
FEATURES
APPLICATIONS
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TYPICAL APPLICATION
+
+
–
–
Dual Differential Amplifi er with 5MHz Lowpass Filters
>82dB Signal-to-Noise (3V Supply, 2V
Low Distortion (1MHz, 2V
Specifi ed 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
Dual Differential ADC Driver and Filter
Single-Ended to Differential Converter
Matched, Dual, Differential Gain or 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
0.01μF
0.01μF
4th Order Filters
Approximates Chebyshev Response
Guaranteed Phase and Gain Matching
Resistor-Programmable Differential Gain
HD2: 93dBc
HD3: 96dBc
806Ω
806Ω
806Ω
806Ω
LT6604-5
+INA
V
V
–INA
+INB
V
V
–INB
MIDA
OCMA
MIDB
OCMB
–
–
+
+
–
+
–
+
V
–
P-P
–OUTB
+OUTB
–OUTA
+OUTA
V
V
V
+
+
+
Output, 800Ω Load)
A
B
B
3V
3V
50Ω
50Ω
50Ω
50Ω
P-P
Output)
18pF
18pF
LTC22xx
AIN
AIN
+
–
+
–
3V
DOUT
DOUT
DESCRIPTION
The LT
amplifi ers, each with a 4th order, 5MHz lowpass fi lter. The
fi xed frequency lowpass fi lter approximates a Chebyshev
response. By integrating a fi lter and a differential ampli-
fi er, 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 signifi cantly degrading
the signal-to-noise ratio.
Gain and phase are well matched between the two chan-
nels. Gain for each channel is independently programmed
using two external resistors. The LT6604-5 enables level
shifting by providing an adjustable output common mode
voltage, making it ideal for directly interfacing to ADCs.
The LT6604-5 is fully specifi ed for 3V operation. The dif-
ferential design enables outstanding performance at a
2V
See the back page of this datasheet for a complete list of
related single and dual differential amplifi ers with integrated
2.5MHz to 20MHz lowpass fi lters.
L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation. All other
trademarks are the property of their respective owners.
DUAL ADC
P-P
66045 TA01
Differential Amplifi er and
signal level for a single 3V supply.
®
6604-5 consists of two matched, fully differential
Dual Very Low Noise,
5MHz Lowpass Filter
25
20
15
10
5
0
–0.20
Channel to Channel Gain Matching
50 TYPICAL UNITS
T
GAIN = 1
f
IN
A
= 25°C
= 5MHz
–0.10
GAIN MATCH (dB)
0
LT6604-5
0.10
66045 TA01b
0.20
66045f
1