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參數(shù)資料
| 型號： | VCA2611 |
| 英文描述： | Dual, Variable-Gain Amplifier with Low-Noise Preamp |
| 中文描述： | 雙路，可變增益放大器的低噪聲前置放大器 |
| 文件頁數(shù)： | 1/19頁 |
| 文件大?。?/td> | 389K |
| 代理商： | VCA2611 |
FEATURES
G
LOW-NOISE PREAMP:
– Low Input Noise: 0.95nV/
√
Hz
–
Active Termination Noise Reduction
–
Switchable Termination Value
–
80MHz Bandwidth
–
5dB to 25dB Gain
–
Differential In and Out
G
LOW-NOISE VARIABLE GAIN AMPLIFIER:
–
Low-Noise VCA
–
Up to 40dB Gain Range
–
40MHz Bandwidth
–
Differential In and Out
G
LOW CROSSTALK:
66dB at Max Gain, 5MHz
G
HIGH-SPEED VARIABLE GAIN ADJUST
G
SWITCHABLE EXTERNAL PROCESSING
APPLICATIONS
G
ULTRASOUND SYSTEMS
G
WIRELESS RECEIVERS
G
TEST EQUIPMENT
DESCRIPTION
The VCA2616 and VCA2611 are dual, Low-Noise Preamplifiers
(LNP), plus low-noise Variable Gain Amplifiers (VGA). The
VCA2611 is an upgraded version of the VCA2616. The only
difference between the VCA2616 and the VCA2611 is the input
structure to the LNP. The VCA2616 is limited to –0.3V negative-
going input spikes; the VCA2611 is limited to –2.0V negative-
going input spikes. This change allows the user to use slower
and less expensive input clamping diodes prior to the LNP input.
In some designs, input clamping may not be required.
The combination of Active Termination (AT) and Maximum
Gain Select (MGS) allow for the best noise performance. The
VCA2616 and VCA2611 also feature low crosstalk and out-
standing distortion performance.
The LNP has differential input and output capability and is
strappable for gains of 5dB, 17dB, 22dB, or 25dB. Low input
impedance is achieved by AT, resulting in as much as a 4.6dB
improvement in noise figure over conventional shunt termina-
tion. The termination value can also be switched to accommo-
date different sources. The output of the LNP is available for
external signal processing.
The variable gain is controlled by an analog voltage whose
gain varies from 0dB to the gain set by the MGS. The ability
to program the variable gain also allows the user to optimize
dynamic range. The VCA input can be switched from the LNP
to external circuits for different applications. The output can be
used in either a single-ended or differential mode to drive high-
performance Analog-to-Digital (A/D) converters, and is cleanly
limited for optimum overdrive recovery.
The combination of low noise, gain, and gain range program-
mability makes the VCA2616 and VCA2611 versatile building
blocks in a number of applications where noise performance
is critical. The VCA2616 and VCA2611 are available in a
TQFP-48 package.
Dual, Variable-Gain Amplifier
with Low-Noise Preamp
Low Noise
Preamp
5dB to 25dB
Programmable
Gain Amplifier
24 to 45dB
Voltage
Controlled
Attenuator
Analog
Control
Maximum Gain
Select
RF
2
RF
1
FB
FBSW
LNP
IN
P
LNP
IN
N
LNP
GS1
LNP
GS2
LNP
GS3
LNP
Gain
Set
Input
LNP
OUT
P
SEL
VCA
IN
P
LNP
OUT
N VCA
IN
N
VCA
CNTL
FB
CNTL
VCA
OUT
P
VCA
OUT
N
MGS
1
MGS
2
MGS
3
Maximum Gain Select
VCA2616
(1 of 2 Channels)
VCA2616
VCA2611
SBOS234E
–
MARCH 2002
–
REVISED NOVEMBER 2004
VCA2616
www.ti.com
Copyright 2002-2004, Texas Instruments Incorporated
All trademarks are the property of their respective owners.
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.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| VCA2611EVM | 功能描述:放大器 IC 開發(fā)工具 VCA2611 Eval Mod RoHS:否 制造商:International Rectifier 產(chǎn)品:Demonstration Boards 類型:Power Amplifiers 工具用于評估:IR4302 工作電源電壓:13 V to 23 V |
| VCA2611Y/250 | 功能描述:特殊用途放大器 Dual Variable Gain RoHS:否 制造商:Texas Instruments 通道數(shù)量:Single 共模抑制比（最小值）: 輸入補(bǔ)償電壓: 工作電源電壓:3 V to 5.5 V 電源電流:5 mA 最大功率耗散: 最大工作溫度:+ 70 C 最小工作溫度:- 40 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-20 封裝:Reel |
| VCA2611Y/2K | 功能描述:特殊用途放大器 Dual Variable Gain RoHS:否 制造商:Texas Instruments 通道數(shù)量:Single 共模抑制比（最小值）: 輸入補(bǔ)償電壓: 工作電源電壓:3 V to 5.5 V 電源電流:5 mA 最大功率耗散: 最大工作溫度:+ 70 C 最小工作溫度:- 40 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-20 封裝:Reel |
| VCA2612 | 制造商:BB 制造商全稱:BB 功能描述:TMDual, VARIABLE GAIN AMPLIFIER with Low Noise Preamp |
| VCA2612Y | 制造商:BB 制造商全稱:BB 功能描述:TMDual, VARIABLE GAIN AMPLIFIER with Low Noise Preamp |
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