Datasheet > AD8367ARUZ1

AD8367ARUZ1

更新时间： 2024-02-24 05:14:54

品牌	Logo	应用领域
亚德诺 - ADI		/
页数	文件大小	规格书
24页	497K
描述
500 MHz, Linear-in-dB VGA with AGC Detector

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AD8367ARUZ1 数据手册

500 MHz, Linear-in-dB VGA

with AGC Detector

AD8367

FUNCTIONAL BLOCK DIAGRAM

FEATURES

VPSI

VPSO

ENBL

Broad-range analog variable gain: −2.5 dB to +42.5 dB

3 dB cutoff frequency of 500 MHz

Gain up and gain down modes

AD8367

ICOM

INPT

ICOM

DECL

HPFL

VOUT

9-STAGE ATTENUATOR BY 5dB

BIAS

Linear-in-dB, scaled 20 mV/dB

Resistive ground referenced input

Nominal Z_IN= 200 Ω

CELLS

On-chip, square-law detector

Single-supply operation: 2.7 V to 5.5 V

SQUARE

LAW

DETECTOR

GAUSSIAN INTERPOLATOR

ICOM

OCOM

APPLICATIONS

MODE

GAIN

DETO

Cellular base stations

Broadband access

Figure 1.

Power amplifier control loops

Complete, linear IF AGC amplifiers

High speed data I/O

GENERAL DESCRIPTION

The AD8367 is a high performance 45 dB variable gain

amplifier with linear-in-dB gain control for use from low

frequencies up to several hundred megahertz. The range,

flatness, and accuracy of the gain response are achieved using

Analog Devices’ X-AMP® architecture, the most recent in a

series of powerful proprietary concepts for variable gain

applications, which far surpasses what can be achieved using

competing techniques.

The analog gain-control input is scaled at 20 mV/dB and runs

from 50 mV to 950 mV. This corresponds to a gain of −2.5 dB

to +42.5 dB, respectively, when the gain up mode is selected and

+42.5 dB to −2.5 dB, respectively, when gain down mode is

selected. The gain down, or inverse, mode must be selected

when operating in AGC in which an integrated square-law

detector with an internal setpoint is used to level the output to

354 mV rms, regardless of the crest factor of the output signal.

A single external capacitor sets up the loop averaging time.

The input is applied to a 9-stage, 200 Ω resistive ladder network.

Each stage has 5 dB of loss, giving a total attenuation of 45 dB.

At maximum gain, the first tap is selected; at progressively

lower gains, the tap moves smoothly and continuously toward

higher attenuation values. The attenuator is followed by a

42.5 dB fixed gain feedback amplifier—essentially an

operational amplifier with a gain bandwidth product of

100 GHz—and is very linear, even at high frequencies. The

output third order intercept is +20 dBV at 100 MHz (+27 dBm,

re 200 Ω), measured at an output level of 1 V p-p with V_S= 5 V.

The AD8367 can be powered on or off by a voltage applied to

the ENBL pin. When this voltage is at a logic LO, the total

power dissipation drops to the milliwatt range. For a logic HI,

the chip powers up rapidly to its normal quiescent current of

26 mA at 25°C. The AD8367 is available in a 14-lead TSSOP

package for the industrial temperature range of −40°C to +85°C.

Rev. A

Information furnished by Analog Devices is believed to be accurate and reliable. However, no

responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other

rights of third parties that may result from its use. Specifications subject to change without notice. No

license is granted by implication or otherwise under any patent or patent rights of Analog Devices.

Trademarks and registeredtrademarks arethe property of their respective owners.

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Tel: 781.329.4700

Fax: 781.461.3113

www.analog.com

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AD8367ARUZ-RL7	ADI	获取价格	500 MHz, Linear-in-dB VGA with AGC Detector
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AD8367L703F	ADI	获取价格	Aerospace 500 MHz, 45 dB Linear-in-dB Variable Gain Amplifier
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AD8367S	ADI	获取价格	暂无描述
AD8368	ADI	获取价格	800 MHz, Linear-in-dB VGA with AGC Detector
AD8368_07	ADI	获取价格	800 MHz, Linear-in-dB VGA with AGC Detector
AD8368ACPZ-REEL7	ADI	获取价格	800 MHz, Linear-in-dB VGA with AGC Detector
AD8368ACPZ-WP	ADI	获取价格	800 MHz, Linear-in-dB VGA with AGC Detector
AD8368-EVALZ	ADI	获取价格	800 MHz, Linear-in-dB VGA with AGC Detector

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