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LT6604-5 PDF预览

LT6604-5

更新时间: 2023-12-20 18:46:29
品牌 Logo 应用领域
亚德诺 - ADI 放大器
页数 文件大小 规格书
16页 187K
描述
双通道、非常低噪声、差分放大器和 5MHz 低通滤波器

LT6604-5 数据手册

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LT6604-5  
Dual Very Low Noise,  
Differential Amplifier and  
5MHz Lowpass Filter  
DESCRIPTION  
FEATURES  
The LT®6604-5 consists of two matched, fully differential  
amplifiers, each with a 4th order, 5MHz 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.  
n
Dual Differential Amplifier with 5MHz Lowpass Filters  
4th Order Filters  
Approximates Chebyshev Response  
Guaranteed Phase and Gain Matching  
Resistor-Programmable Differential Gain  
n
>82dB Signal-to-Noise (3V Supply, 2V Output)  
P-P  
n
Low Distortion (1MHz, 2V Output, 800Ω Load)  
P-P  
HD2: 93dBc  
HD3: 96dBc  
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  
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 specified for 3V operation. The dif-  
ferential design enables outstanding performance at a  
APPLICATIONS  
n
Dual Differential ADC Driver and Filter  
n
Single-Ended to Differential Converter  
2V signal level for a single 3V supply.  
P-P  
n
Matched, Dual, Differential Gain or Filter Stage  
See the back page of this datasheet for a complete list of  
relatedsingleanddualdifferentialamplifierswithintegrated  
2.5MHz to 20MHz lowpass filters.  
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  
3V  
Channel to Channel Gain Matching  
25  
50 TYPICAL UNITS  
= 25°C  
LT6604-5  
+INA  
LTC22xx  
DUAL ADC  
+
V A  
3V  
3V  
T
806Ω  
A
50Ω  
50Ω  
GAIN = 1  
+
–OUTA  
+OUTA  
20  
15  
10  
5
V
+
AIN  
f
= 5MHz  
+
MIDA  
IN  
18pF  
18pF  
V
DOUT  
OCMA  
0.01μF  
–INA  
+
+
806Ω  
806Ω  
+
V B  
+INB  
V
50Ω  
–OUTB  
+OUTB  
+
AIN  
MIDB  
V
DOUT  
OCMB  
50Ω  
0.01μF  
+
–INB  
+
806Ω  
0
V
–0.20  
–0.10  
0
0.10  
0.20  
66045 TA01  
GAIN MATCH (dB)  
66045 TA01b  
66045fa  
1

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