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參數資料
| 型號： | AD8019 |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | DSL Line Driver with Power-Down |
| 中文描述： | DSL線路驅動器，掉電 |
| 文件頁數： | 14/20頁 |
| 文件大小： | 782K |
| 代理商： | AD8019 |
REV. 0
AD8019
–14–
R1
17.3
R
L
= 100
R2
17.3
1:1.7
TRANSFORMER
P
16dBm
LINE
POWER
13dBm
301
301
50
50
0.1 F
10k
10k
0.1 F
0.1 F
+12V
100
100
0.1 F
V
IN
6V
0.1 F
10 F
Figure 6. Recommended Application Circuit for Single +12 V Supply
R1
12.4
R
L
= 100
R2
12.4
1:1
TRANSFORMER
P
16dBm
LINE
POWER
13dBm
301
301
50
50
0.1 F
10k
10k
0.1 F
+12V
100
100
0.1 F
V
IN
0.1 F
–
12V
0.1 F
10 F
10 F
Figure 7. Recommended Application Circuit for
±
12 V Supply
–
0.25
–
0.15
–
0.05
TIME
–
ms
0
0.10
0.15
0.20
V
–
3
–
2
–
1
0
1
2
3
4
0.05
–
0.10
–
0.20
Figure 5. DMT Signal in the Time Domain
Generating DMT Signals
At this time, DMT-modulated waveforms are not typically
menu-selectable items contained within arbitrary waveform
generators. Even using (AWG) software to generate DMT sig-
nals, AWGs that are available today may not deliver DMT
signals sufficient in performance with regard to MTPR due to
limitations in the D/A converters and output drivers used by
AWG manufacturers. Similar to evaluating single-tone distor-
tion performance of an amplifier, MTPR evaluation requires a
DMT signal generator capable of delivering MTPR performance
better than that of the driver under evaluation. Generating
DMT signals can be accomplished using a Tektronics AWG
2021 equipped with Option 4, (12-/24-bit, TTL Digital Data
Out), digitally coupled to Analog Devices
’
AD9754, a 14-bit
TxDAC
, buffered by an AD8002 amplifier configured as a
differential driver. Note that the DMT waveforms, available on
the Analog Devices website, www.analog.com, or similar. WFM
files are needed to produce the necessary digital data required to
drive the TxDAC from the optional TTL Digital Data output of
the TEK AWG2021.
TxDAC is a registered trademark of Analog Devices, Inc.
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