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VCA2619

更新时间： 2024-11-01 21:54:51
品牌 Logo 应用领域
BB 放大器
页数 文件大小 规格书
16页 314K
描述
Dual, Variable Gain Amplifier with Input Buffer

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VCA2619 数据手册

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VCA2619  
SBOS276A − AUGUST 2003 − REVISED AUGUST 2003  
Dual, Variable Gain Amplifier  
with Input Buffer  
FEATURES  
DESCRIPTION  
The VCA2619 is a highly integrated, dual receive channel,  
Variable Gain Amplifier (VGA) with analog gain control.  
D
D
GAIN RANGE: 50dB  
LOW CROSSTALK: - 60dB at Max Gain,  
= 5MHz  
The VCA2619s VGA section consists of two parts: the  
Voltage Controlled Attenuator (VCA) and the Programmable  
Gain Amplifier (PGA). The gain and gain range of the PGA  
can be digitally programmed. The combination of these two  
programmable elements results in a variable gain ranging  
from 0dB up to a maximum gain as defined by the user  
through external connections. The single−ended unity gain  
input buffer provides predictable high input impedance. The  
output of the VGA can be used in either a single−ended or  
differential mode to drive high−performance Analog−to−  
Digital (A/D) converters. A separate power−down pin  
reduces power consumption.  
f
IN  
D
D
D
HIGH−SPEED VARIABLE GAIN ADJUST  
POWER SHUTDOWN MODE  
HIGH IMPEDANCE INPUT BUFFER  
APPLICATIONS  
D
D
D
D
ULTRASOUND SYSTEMS  
WIRELESS RECEIVERS  
TEST EQUIPMENT  
RADAR  
The VCA2619 also features low crosstalk and outstanding  
distortion performance. The combination of low noise and  
gain range programmability make the VCA2619 a versatile  
building block in a number of applications where noise  
performance is critical. The VCA2619 is available in a  
TQFP−32 package.  
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments  
semiconductor products and disclaimers thereto appears at the end of this data sheet.  
All trademarks are the property of their respective owners.  
ꢀꢁ ꢂ ꢃꢄ ꢅ ꢆꢇ ꢂꢈ ꢃ ꢉꢆꢉ ꢊꢋ ꢌꢍ ꢎ ꢏꢐ ꢑꢊꢍꢋ ꢊꢒ ꢓꢔ ꢎ ꢎ ꢕꢋꢑ ꢐꢒ ꢍꢌ ꢖꢔꢗ ꢘꢊꢓ ꢐꢑꢊ ꢍꢋ ꢙꢐ ꢑꢕꢚ ꢀꢎ ꢍꢙꢔ ꢓꢑꢒ  
ꢓ ꢍꢋ ꢌꢍꢎ ꢏ ꢑꢍ ꢒ ꢖꢕ ꢓ ꢊ ꢌꢊ ꢓ ꢐ ꢑꢊ ꢍꢋꢒ ꢖ ꢕꢎ ꢑꢛꢕ ꢑꢕ ꢎ ꢏꢒ ꢍꢌ ꢆꢕꢜ ꢐꢒ ꢇꢋꢒ ꢑꢎ ꢔꢏ ꢕꢋꢑ ꢒ ꢒꢑ ꢐꢋꢙ ꢐꢎ ꢙ ꢝ ꢐꢎ ꢎ ꢐ ꢋꢑꢞꢚ  
ꢀꢎ ꢍ ꢙꢔꢓ ꢑ ꢊꢍ ꢋ ꢖꢎ ꢍ ꢓ ꢕ ꢒ ꢒ ꢊꢋ ꢟ ꢙꢍ ꢕ ꢒ ꢋꢍꢑ ꢋꢕ ꢓꢕ ꢒꢒ ꢐꢎ ꢊꢘ ꢞ ꢊꢋꢓ ꢘꢔꢙ ꢕ ꢑꢕ ꢒꢑꢊ ꢋꢟ ꢍꢌ ꢐꢘ ꢘ ꢖꢐ ꢎ ꢐꢏ ꢕꢑꢕ ꢎ ꢒꢚ  
Copyright 2003, Texas Instruments Incorporated  
www.ti.com  
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