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參數(shù)資料
| 型號： | AD8321 |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | Gain Programmable CATV Line Driver(可編程增益CATV線驅(qū)動器) |
| 中文描述： | 增益可編程有線電視線路驅(qū)動器（可編程增益有線電視線驅(qū)動器） |
| 文件頁數(shù)： | 1/9頁 |
| 文件大?。?/td> | 64K |
| 代理商： | AD8321 |
CLK
TECHNCAL
a
PRELIMINARY TECHNICAL DATA
Gain Programmable
CATV Line Driver
AD8321
One Technology Way,
P.O. Box 9106,
Norwood. MA 02062-9106, U.S.A.
Tel: 617/329-4700 Fax: 617/326-8703
This information applies to a product under development. Its characteristics and specifications are
subject to change without notice. Analog Devices assumes no obligation regarding future manufacture
of this product unless otherwise agreed to in writing.
Rev 7.1 6/26/98
Block Diagram
DESCRIPTION
The AD8321 is a low cost digitally controlled variable gain
amplifier optimized for coaxial line driving applications such as
cable modems that are designed to the MCNS (upstream) standard.
A 7-bit serial word determines the desired output gain over a 53
dB range resulting in gain changes of 0.75dB/LSB
The AD8321 comprises a digitally controlled variable attenuator
of 0 dB to -53 dB which is preceded by a low noise, fixed gain
buffer and is followed by a low distortion high power amplifier.
The AD8321 accepts a
differential or single-ended input signal. The output is specified
for driving a 75W load, such as coaxial cable, although the AD8321
is capable of driving other loads. Distortion performance of -57
dBc is achieved with an output level up to 11dBm and 42 Mhz
bandwidth using a
9V supply.
A key performance and cost advantage of the AD8321 results
from the ability to maintain a constant 75W output impedance
during power-up and power-down conditions. This eliminates the
need for external 75W termination resulting in twice the effective
output voltage when compared to a standard operational amplifier,
thus eliminating the need for a transformer. Additionally the on-
chip 75W termination results in low glitch output during power-
down and power-up transitions, eliminating the need for an external
switch
The AD8321 is packaged in a low cost 20-pin SOIC, operates
from a single +5V through +10V supply and has an operational
temperature range of -40°C to +85°C.
FEATURES
Linear in dB Gain Response over a 53dB Range
Drives Low Distortion >11 dBm Signal into 75W Load:
-57 dBc SFDR at 42 MHz
Very Low Output Noise Level
Maintains 75W Output Impedance
Power up and Power down Condition
No Line Transformer Required
Upper Bandwidth: 235 MHz
Single Supply Operation from 5V to 10V
Power Down functionality
Supports SPI in addition to Parallel Control Interfaces
TTL / CMOS Logic Levels
Pin for Pin Compatible with the AD8320
APPLICATIONS
Gain Programmable Line Driver for MCNS Applications
HFC High-speed Data Modems
Interactive Set-top Boxes
PC Plug-in Modems
General Purpose Digitally Controlled Variable Gain Block
ORDERING GUIDE
Model
AD8321AR
AD8321AR-REEL -40
°
C to +85
°
C
AD8321-EVAL
Temperature Range
-40
°
C to +85
°
C
Package
20-Pin SOIC
20-Pin SOIC
Evaluation Board
DATEN
IN V.
ATTEN U ATO R
C OR E
DATA LATCH
DATA SHIFT REGISTER
POWER
DOW N
SWITCH
INTER.
VIN+
VIN-
PD
VOUT
PW R AMP
VCCL
VCC
GND
SDATA
Reverse
AMP
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| AD8324 | 3.3 V Upstream Cable Line Driver |
| AD8324ACP | 3.3 V Upstream Cable Line Driver |
| AD8324ACP-EVAL | 3.3 V Upstream Cable Line Driver |
| AD8324ACP-REEL7 | 3.3 V Upstream Cable Line Driver |
| AD8324JRQ | 3.3 V Upstream Cable Line Driver |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AD8321_05 | 制造商:AD 制造商全稱:Analog Devices 功能描述:Gain Programmablea CATV Line Driver |
| AD8321AR | 制造商:Analog Devices 功能描述:SP Amp Line Driver Amp Single 20-Pin SOIC W Tube 制造商:Rochester Electronics LLC 功能描述:SOIC MCNS CABLE MODEM LINE DRIVER - Bulk |
| AD8321AR-REEL | 制造商:Analog Devices 功能描述:SP Amp Line Driver Amp Single 20-Pin SOIC W T/R |
| AD8321ARZ | 功能描述:IC LINE DRIVER CATV 3.3V 20SOIC RoHS:是 類別:集成電路 (IC) >> 線性 - 視頻處理 系列:- 產(chǎn)品變化通告:Product Discontinuation 07/Mar/2011 標(biāo)準(zhǔn)包裝:3,000 系列:OMNITUNE™ 類型:調(diào)諧器 應(yīng)用:移動電話，手機(jī)，視頻顯示器 安裝類型:表面貼裝 封裝/外殼:65-WFBGA 供應(yīng)商設(shè)備封裝:PG-WFSGA-65 包裝:帶卷 (TR) 其它名稱:SP000365064 |
| AD8321ARZ2 | 制造商:AD 制造商全稱:Analog Devices 功能描述:Gain Programmable CATV Line DRiver |
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