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VCA2617

更新时间： 2024-11-02 08:13:59
品牌 Logo 应用领域
BB 放大器
页数 文件大小 规格书
19页 523K
描述
Dual, Variable Gain Amplifier

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VCA2617 数据手册

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VCA2617  
SBOS326 −AUGUST 2005  
Dual, Variable Gain Amplifier  
FD EATURES  
DESCRIPTION  
INDEPENDENT CHANNEL CONTROLS:  
− Gain Range: 48dB  
− Clamping Levels  
The VCA2617 is a dual-channel, continuously variable,  
voltage-controlled gain amplifier well-suited for a variety of  
ultrasound systems as well as applications in proximity  
detectors and test equipment. The VCA2617 uses a true  
variable-gain amplifier architecture, achieving very good  
noise performance at low gains, while not sacrificing high gain  
distortion performance.  
− Post-Gain: 0, +6dB  
D
D
D
D
D
D
D
D
LOW NOISE: 4.1nV//Hz  
LOW POWER: 52mW/Channel  
BANDWIDTH: 50MHz  
Following a linear-in-dB response, the VCA2617 gain can be  
varied over a 48dB range with a 0.2V to 2.3V control voltage.  
Two separate high-impedance control inputs allow for a  
channel independent variation of the gains. Each channel of  
the VCA2617 can be configured to provide a gain range of  
−10dB to 38dB, or −16dB to 32dB, depending on the gain  
select pin (HG). This post-gain feature allows the user to  
optimize the output swing of VCA2617 for a variety of  
high-speed analog-to-digital converters (ADC). As a means to  
improve system overload recovery time, the VCA2617 also  
provides an internal clamping circuitry where an externally  
applied voltage sets the desired output clamping level.  
HARMONIC DISTORTION: −53dBc at 5MHz  
CROSSTALK: −61dB at 5MHz  
5V SINGLE SUPPLY  
POWER-DOWN MODE  
SMALL QFN-32 PACKAGE (5x5mm)  
AD PPLICATIONS  
MEDICAL AND INDUSTRIAL ULTRASOUND  
SYSTEMS  
The VCA2617 operates on a single +5V supply while  
consuming only 52mW per channel. It is available in a small  
QFN-32 package (5x5mm).  
− Suitable for 10-Bit and 12-Bit Systems  
D
D
TEST EQUIPMENT  
SONAR  
RELATED PRODUCTS  
PART NUMBER  
DESCRIPTION  
VCA2615  
Dual, Low-Noise, Variable-Gain Amplifier with  
Preamp  
Gain  
C
Select A  
A
EXT  
V
A
V
A
CLMP  
CNTL  
Out A+  
In A+  
Clamping  
Circuitry  
V−I  
I−V  
−
Out A  
−
In A  
Out B+  
In B+  
Clamping  
Circuitry  
V−I  
I−V  
−
Out B  
−
In B  
V
B
V
B
CLMP  
Gain  
CNTL  
C
B
EXT  
Select B  
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 2005, Texas Instruments Incorporated  
www.ti.com  
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