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| 型号： | AD8398ACPZ-RL |
| 厂商： | Analog Devices Inc |
| 文件页数： | 12/12页 |
| 文件大小： | 0K |
| 描述： | IC LINE DRIVER DUAL VDSL 16LFCSP |
| 标准包装： | 5,000 |
| 类型： | 驱动器 |
| 驱动器/接收器数： | 2/0 |
| 规程： | xDSL |
| 电源电压： | 12V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-VQFN 裸露焊盘，CSP |
| 供应商设备封装： | 16-LFCSP-WQ（4x4） |
| 包装： | 带卷 (TR) |
AD8398A
Rev. D | Page 9 of 12
MULTITONE POWER RATIO
The discrete multitone (DMT) signal used in xDSL systems
carries data in discrete tones or bins that 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. Generally, designers are
concerned with two types of MTPR: in band and out of band.
In-band 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. Out-of-band MTPR is
defined as the spurious emissions that occur in the receive bands.
Transmit band power and receive band MTPR are shown in
and ADSL2+, respectively.
–100
–90
–80
–70
–60
–50
–40
–30
–20
–10
0
07
76
0-
0
10
FREQUENCY (MHz)
O
UT
P
UT
P
O
W
E
R
(
d
B)
04
28
612
10
16
14
20
18
Figure 13. MTPR of a Typical VDSL2 Profile 17a DMT Test Signal,
VS = ±6 V, Output Power = 14.5 dBm
07
76
0-
0
20
–120
–110
–100
–90
–80
–70
–60
–50
–40
–30
–20
–10
0
01
23
45
67
89
10
O
UT
P
UT
P
O
W
E
R
(
d
Bm
/Hz
)
FREQUENCY (MHz)
Figure 14. MTPR of a Typical VDSL2 Profile 8b DMT Test Signal,
VS = ±6 V, Output Power = 20.4 dBm
–100
–90
–80
–70
–60
–50
–40
–30
–20
–10
0
07
76
0-
0
12
FREQUENCY (MHz)
O
UT
P
UT
P
O
W
E
R
(
d
B)
0
0.5
1.0
1.5
2.0
2.5
3.0
Figure 15. MTPR of a Typical ADSL2+ DMT Test Signal,
VS = ±6 V, Output Power = 20.4 dBm
LIGHTNING AND AC POWER FAULT
DSL line drivers are transformer-coupled to the twisted pair
telephone line. In this environment, the AD8398A may be
subject to large line transients resulting from events such as
lightning strikes or downed power lines. Additional circuitry
is required to protect the AD8398A from possible damage due
to these events.
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相关代理商/技术参数 |
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| AD8398ACPZ-TR | 制造商:Analog Devices 功能描述:DUAL WIDEBAND HI OUTPUT CURRENT OPAMP - Tape and Reel |
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