參數(shù)資料
型號(hào): AD8392AAREZ-RL
廠商: Analog Devices Inc
文件頁(yè)數(shù): 2/12頁(yè)
文件大?。?/td> 0K
描述: IC LINE DRVR ADSL/ADSL 28-TSSOP
標(biāo)準(zhǔn)包裝: 2,500
類(lèi)型: 驅(qū)動(dòng)器
驅(qū)動(dòng)器/接收器數(shù): 2/0
規(guī)程: xDSL
電源電壓: 5 V ~ 24 V
安裝類(lèi)型: 表面貼裝
封裝/外殼: 28-SOIC(0.173",4.40mm 寬)裸露焊盤(pán)
供應(yīng)商設(shè)備封裝: 28-HTSSOP
包裝: 帶卷 (TR)
AD8392A
Rev. 0 | Page 10 of 12
MULTITONE POWER RATIO
The DMT signal used in ADSL/ADSL2+ systems carries data in
discrete tones or bins, which appear in the frequency domain in
evenly spaced 4.3125 kHz intervals. In applications using this
type of waveform, multitone power ratio (MTPR) is a commonly
used measure of linearity. MTPR is defined as the measured
difference from the peak of one tone that is loaded with data to
the peak of an adjacent tone that is intentionally left empty.
Figure 19 and Figure 20 show the AD8392A MTPR for a 5.5
crest factor waveform for empty bins in the ADSL and extended
ADSL2+ bandwidths.
0
–100
CENTER 646.9kHz
SPAN 10kHz
(d
B
m
)
–10
–20
–30
–40
–50
–60
–70
–80
–90
06
47
7-
0
43
Figure 19. MTPR at 647 kHz
0
–100
CENTER 1.9664kHz
SPAN 10kHz
(d
B
m
)
–10
–20
–30
–40
–50
–60
–70
–80
–90
06
47
7-
0
44
Figure 20. MTPR at 1.966 MHz
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