Datasheet > VCA2616

VCA2616

更新时间： 2024-11-01 22:16:15

品牌	Logo	应用领域
BB		放大器
页数	文件大小	规格书
19页	387K
描述
Dual, Variable-Gain Amplifier with Low-Noise Preamp

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VCA2616 数据手册

VCA2616

VCA2611

SBOS234E – MARCH 2002 – REVISED NOVEMBER 2004

Dual, Variable-Gain Amplifier

with Low-Noise Preamp

FEATURES

DESCRIPTION

● LOW-NOISE PREAMP:

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.

– Low Input Noise: 0.95nV/√Hz

– Active Termination Noise Reduction

– Switchable Termination Value

– 80MHz Bandwidth

– 5dB to 25dB Gain

– Differential In and Out

● LOW-NOISE VARIABLE GAIN AMPLIFIER:

– Low-Noise VCA

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.

– Up to 40dB Gain Range

– 40MHz Bandwidth

– Differential In and Out

● LOW CROSSTALK: 66dB at Max Gain, 5MHz

● HIGH-SPEED VARIABLE GAIN ADJUST

● SWITCHABLE EXTERNAL PROCESSING

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.

APPLICATIONS

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.

● ULTRASOUND SYSTEMS

● WIRELESS RECEIVERS

● TEST EQUIPMENT

Maximum Gain Select

MGS₁MGS₂MGS₃

FB_CNTL

LNP_OUT

VCA_IN

VCA_CNTL

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.

RF₂

RF₁

FBSW

VCA2616

(1 of 2 Channels)

Analog

Control

Maximum Gain

Select

Input

LNP_INP

VCA_OUT

LNP_GS1

LNP_GS2

Programmable

Gain Amplifier

24 to 45dB

Voltage

Controlled

Attenuator

Low Noise

Preamp

5dB to 25dB

LNP

Gain

Set

LNP_GS3

LNP_INN

VCA_OUT

LNP_OUTP VCA_IN

SEL

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.

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.

www.ti.com

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与VCA2616相关器件

型号	品牌	获取价格	描述	数据表
VCA2616YR	TAOS	获取价格	Dual, Variable-Gain Amplifier with Low-Noise Preamp
VCA2616YT	TAOS	获取价格	Dual, Variable-Gain Amplifier with Low-Noise Preamp
VCA2617	BB	获取价格	Dual, Variable Gain Amplifier
VCA2617	TI	获取价格	Wideband, > 40dB Gain Adjust Range, Linear in V/V VARIABLE GAIN AMPLIFIER
VCA2617RHBR	BB	获取价格	Dual, Variable Gain Amplifier
VCA2617RHBR	TI	获取价格	2 通道小型封装的可变增益放大器 \| RHB \| 32 \| -40 to 85
VCA2617RHBRG4	BB	获取价格	Dual, Variable Gain Amplifier
VCA2617RHBT	BB	获取价格	Dual, Variable Gain Amplifier
VCA2617RHBT	TI	获取价格	2 通道小型封装的可变增益放大器 \| RHB \| 32 \| -40 to 85
VCA2617RHBTG4	BB	获取价格	Dual, Variable Gain Amplifier

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