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參數(shù)資料
| 型號(hào)： | AD8326ARP |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | 通用總線功能 |
| 英文描述： | High Output Power Programmable CATV Line Driver |
| 中文描述： | LINE DRIVER, PDSO28 |
| 封裝： | HEAT SINK, POWER, SOIC-28 |
| 文件頁數(shù)： | 1/24頁 |
| 文件大?。?/td> | 475K |
| 代理商： | AD8326ARP |
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 that
may result from its use. No license is granted by implication or otherwise
under any patent or patent rights of Analog Devices.
a
AD8326
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700
Fax: 781/326-8703
www.analog.com
Analog Devices, Inc., 2001
Hgh Output Power
Programmable CATV Line Driver
FUNCT IONAL BLOCK DIAGRAM
DIFF OR
SINGLE
INPUT
AMP
ATTENUATION
CORE
Z
OUT
DIFF =
75
8
8
8
Z
IN
(SINGLE) = 800
Z
IN
(DIFF) = 1.6k
AD8326
DATEN
DATA
CLK
V
EE
(10 PINS)
TXEN
SLEEP
V
OUT+
V
OUT–
V
CC
(7 PINS)
V
IN+
V
IN–
VERNIER
DECODE
DATA LATCH
SHIFT
REGISTER
POWER-DOWN
LOGIC
POWER
AMP
BYP
GND
FEATURES
Supports DOCSIS Standard for Reverse Path
Transmission
Gain Programmable in 0.75 dB Steps over a 53.5 dB Range
Low Distortion at 65 dBmV Output
–62 dBc SFDR at 21 MHz
–58 dBc SFDR at 65 MHz
1 dB Compression of 25 dBm at 10 MHz
Output Noise Level
–45 dBmV in 160 kHz
Maintains 75
Output Impedance
Power-Up and Power-Down Condition
Upper Bandwidth: 100 MHz (Full Gain Range)
Single or Dual Supply Operation
APPLICATIONS
Gain-Programmable Line Driver
CATV Telephony Modems
CATV Terminal Devices
General-Purpose Digitally Controlled Variable Gain Block
–
40
–
45
–
50
–
55
–
60
–
65
–
70
–
75
–
80
5 15 25 35 45 55 65
FREQUENCY
–
MHz
D
–
ARP(V
S
= +12V)
ARE(V
S
= 5V)
ARP(V
O
= 69dBmV)
ARP(V
O
= 67dBmV)
ARE(V
O
= 65dBmV)
ARE(V
O
= 62dBmV)
Figure 1. Worst Harmonic Distortion vs. Frequency
GE NE RAL DE SCRIPT ION
The AD8326 is a high-output power, digitally controlled, vari-
able gain amplifier optimized for coaxial line driving applications
such as data and telephony cable modems that are designed to
the MCNS-DOCSIS upstream standard. An 8-bit serial word
determines the desired output gain over a 53.5 dB range result-
ing in gain changes of 0.75 dB/LSB. The AD8326 is offered in
two models, each optimized to support the desired output power
and resulting performance.
The AD8326 comprises a digitally controlled variable attenuator
of 0 dB to –54 dB, that is preceded by a low noise, fixed-gain
buffer and is followed by a low distortion high-power amplifier.
The AD8326 accepts a differential or single-ended input signal.
The output is designed to drive a 75
load, such as coaxial
cable, although the AD8326 is capable of driving other loads.
When driving 67 dBm into a 75
load, the AD8326ARP
provides a worst harmonic of only –59 dBc at 21 MHz and
–57 dBc at 42 MHz. When driving 65 dBmV into a 75
load,
the AD8326ARE provides a worst harmonic of only –62 dBc at
21 MHz and –60 dBc at 42 MHz.
The differential output of the AD8326 is compliant with DOCSIS
paragraph 4.2.10.2 for “Spurious Emissions During Burst On/Off
Transients.” In addition, this device has a sleep mode function
that reduces the quiescent current to 4 mA.
The AD8326 is packaged in a low-cost 28-lead TSSOP and a
28-lead P (power) SOIC. Both devices have an operational tem-
perature range of –40
°
C to +85
°
C.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| AD8326 | High Output Power Programmable CATV Line Driver |
| AD8327ARU-REEL | 5 V CATV Line Driver Coarse Step Output Power Control |
| AD8327 | 5 V CATV Line Driver Coarse Step Output Power Control |
| AD8327-EVAL | 5 V CATV Line Driver Coarse Step Output Power Control |
| AD8327ARU | 5 V CATV Line Driver Coarse Step Output Power Control |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AD8326ARP-EVAL | 制造商:Analog Devices 功能描述:AD8326 PSOP EVALUATION BOARD 制造商:Analog Devices 功能描述:AD8326 PSOP EVALUATION BOARD - Bulk |
| AD8326ARP-REEL | 制造商:Analog Devices 功能描述: |
| AD8326ARPZ | 制造商:Analog Devices 功能描述:SP AMP LINE DRVR AMP SGL 5.25V/12.6V 28PSOP-II - Rail/Tube |
| AD8327 | 制造商:AD 制造商全稱:Analog Devices 功能描述:5 V CATV Line Driver Coarse Step Output Power Control |
| AD8327ARU | 制造商:Analog Devices 功能描述:SP Amp Line Driver Amp Single 5.25V 20-Pin TSSOP Tube 制造商:Rochester Electronics LLC 功能描述:TSSOP COARSE STEP CATV LINE DRIVER - Bulk |
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