Datasheet > AD8322ARU-REEL7

AD8322ARU-REEL7

更新时间： 2024-11-21 20:10:31

品牌	Logo	应用领域
亚德诺 - ADI		驱动光电二极管接口集成电路驱动器
页数	文件大小	规格书
16页	676K
描述
IC LINE DRIVER, PDSO28, TSSOP-28, Line Driver or Receiver

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中文翻译

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数据手册

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AD8322ARU-REEL7 数据手册

5 V CATV Line Driver

Coarse Step Output Power Control

AD8322

FEATURES

FUNCTIONAL BLOCK DIAGRAM

Supports DOCSIS Standard for Reverse Path

Transmission

(7 PINS)

Gain Programmable in 6 dB Steps Over a 42 dB

Range

AD8322

Low Distortion at 60 dBmV Output

–58 dBc SFDR at 21 MHz

–56 dBc SFDR at 42 MHz

Output Noise Level

–46 dBmV in 160 kHz Bandwidth

Maintains 75 ⍀ Output Impedance

Power-Up and Power-Down Condition

180 MHz Bandwidth

OUT+

IN+

DIFF

ATTENUATION

OR SINGLE

INPUT

BUFFER

POWER

AMP

CORE

OUT–

IN–

AMP

DIFF =

OUT

75⍀

DECODE

POWER-DOWN

LOGIC

(SINGLE) = 210⍀

(DIFF) = 235⍀

DATA LATCH

SHIFT

5 V Supply Operation

Supports SPI Interfaces

DATEN DATA CLK

GND (12 PINS)

APPLICATIONS

Gain Programmable Line Driver

DOCSIS-Compliant Data Modems

Interactive Set-Top Boxes

PC Plug-in Modems

General-Purpose Digitally Controlled Variable Gain Block

–55

–60

GENERAL DESCRIPTION

= 42MHz

The AD8322 is a low-cost, digitally controlled variable gain ampli-

fier optimized for coaxial line driving applications such as cable

modems that are designed to the MCNS-DOCSIS upstream

standard. An 8-bit serial word determines the desired output

gain over a 42.14 dB range, with gain steps of 6.02 dB/major

carry.

= 60dBmV

@ MAX GAIN

HD3

HD2

–65

–70

The AD8322 comprises a digitally controlled variable attenuator

of 0 dB to –42.14 dB, which is preceded by a low-noise, fixed-gain

buffer and is followed by a low-distortion, high-power ampli-

fier. The AD8322 accepts a differential or single-ended input

signal. The output is specified for driving a 75 Ω load, such as

coaxial cable.

–75

128

Distortion performance of –58 dBc is achieved with an output level

up to 60 dBmV at 21 MHz bandwidth. A key performance and

cost advantage of the AD8322 results from the ability to maintain

a constant 75 Ω output impedance during power-up and power-

down conditions. This eliminates the need for external 75 Ω

termination resulting in twice the effective output voltage when

compared to a standard operational amplifier.

GAIN CODE – Decimal

Figure 1. Harmonic Distortion vs. Gain Control

The AD8322 is packaged in a low-cost 28-lead TSSOP, operates

from a single 5 V supply, and has an operational temperature

range of –40°C to +85°C.

REV. 0

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

which may result from its use. No license is granted by implication or

otherwise under any patent or patent rights of Analog Devices.

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

Tel: 781/329-4700

Fax: 781/326-8703

World Wide Web Site: http://www.analog.com

12 3 4 5 6 7...16

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与AD8322ARU-REEL7相关器件

型号	品牌	获取价格	描述	数据表
AD8322ARUZ	ADI	获取价格	暂无描述
AD8322-EVAL	ADI	获取价格	5 V CATV Line Driver Coarse Step Output Power Control
AD8323	ADI	获取价格	5 V CATV Line Driver Fine Step Output Power Control
AD8323ARU	ADI	获取价格	5 V CATV Line Driver Fine Step Output Power Control
AD8323ARU-REEL	ADI	获取价格	5 V CATV Line Driver Fine Step Output Power Control
AD8323ARUZ	ADI	获取价格	IC LINE DRIVER, PDSO28, TSSOP-28, Line Driver or Receiver
AD8323ARUZ-REEL	ADI	获取价格	IC LINE DRIVER, PDSO28, TSSOP-28, Line Driver or Receiver
AD8323-EVAL	ADI	获取价格	5 V CATV Line Driver Fine Step Output Power Control
AD8324	ADI	获取价格	3.3 V Upstream Cable Line Driver
AD8324_05	ADI	获取价格	3.3 V Upstream Cable Line Driver

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