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LT6604IUFF-15#PBF PDF预览

LT6604IUFF-15#PBF

更新时间: 2024-11-11 20:43:51
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LT6604IUFF-15#PBF 数据手册

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LT6604-15  
Dual Very Low Noise,  
Differential Amplifier and  
15MHz Lowpass Filter  
DESCRIPTION  
FEATURES  
TheLT®6604-15consistsoftwomatched,fullydifferential  
amplifiers,eachwitha4thorder,15MHzlowpasslter.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.  
n
Dual Differential Amplifier with 15MHz Lowpass  
Filters  
4th Order Filters  
Approximates Chebyshev Response  
Guaranteed Phase and Gain Matching  
Resistor-Programmable Differential Gain  
n
76dB Signal-to-Noise (3V Supply, 2V Output)  
P-P  
S
n
Low Distortion, 2V , 800Ω Load, V = 3V  
P-P  
1MHz: 86dBc 2nd, 90dBc 3rd  
10MHz: 63dBc 2nd, 69dBc 3rd  
n
n
n
n
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  
Gainandphasearehighlymatchedbetweenthetwochan-  
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.  
APPLICATIONS  
The LT6604-15 is fully specified for 3V operation. The  
differential design enables outstanding performance at  
n
Dual Differential ADC Driver Plus Filter  
a 2V signal level for a single 3V supply. See the back  
n
P-P  
Single-Ended to Differential Converter  
page of this datasheet for a complete list of related single  
and dual differential amplifiers with integrated 2.5MHz to  
20MHz lowpass filters.  
n
Matched, Dual, Differential Filter Stage  
n
Common Mode Translation of Differential Signals  
n
High Speed ADC Antialiasing and DAC Smoothing in  
Wireless Infrastructure or Networking Applications  
L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.  
All other trademarks are the property of their respective owners.  
n
High Speed Test and Measurement Equipment  
n
Medical Imaging  
TYPICAL APPLICATION  
Channel to Channel Gain Matching  
3V  
16  
50 TYPICAL UNITS  
LT6604-15  
+INA  
LTC22xx  
DUAL ADC  
+
V A  
3V  
T
= 25°C  
A
14  
12  
10  
8
536Ω  
GAIN = 1  
= 15MHz  
50Ω  
50Ω  
0.01μF  
+
+
–OUTA  
+OUTA  
f
IN  
V
V
+
AIN  
+
MIDA  
18pF  
18pF  
DOUT  
OCMA  
536Ω  
536Ω  
–INA  
+
+
+
V B  
3V  
6
4
+INB  
V
50Ω  
50Ω  
0.01μF  
–OUTB  
+OUTB  
+
AIN  
MIDB  
V
DOUT  
OCMB  
–INB  
2
0
536Ω  
+
V
–0.250.2–0.150.1–0.05 0 0.05 0.1 0.15 0.2 0.25  
660415 TA01  
GAIN MATCH (dB)  
660415 TA01b  
660415fb  
1

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