參數(shù)資料
型號(hào)： AD8391AR-REEL7
廠商： Analog Devices Inc
文件頁(yè)數(shù)： 6/20頁(yè)
文件大?。?/td> 0K
描述： IC XDSL LINE DVR W/PWR DN 8-SOIC
產(chǎn)品變化通告： AD8391 Discontinuation 28/Feb/2012
標(biāo)準(zhǔn)包裝： 1,000
類型： 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： 3 V ~ 12 V
安裝類型： 表面貼裝
封裝/外殼： 8-SOIC（0.154"，3.90mm 寬）
供應(yīng)商設(shè)備封裝： 8-SO
包裝： 帶卷 (TR)
REV. A
AD8391
–14–
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 signals,
AWGs that are available today may not deliver DMT signals
sufficient in performance with regard to MTPR due to limitations
in the DACs and output drivers used by AWG manufacturers.
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), are 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.
Video Driver
The AD8391 can be used as a noninverting amplifier by applying a
signal at the VMID pin and grounding the gain resistors (see
Figure 9 for an example circuit). The signal applied to the VMID
pin would be present at both outputs, making this circuit ideal
for any application where one signal needs to be sent to two
different locations, such as a video distribution system. As previ-
ously stated, the AD8391 can operate on split supplies in this
case, eliminating the need for ac-coupling.
The termination resistor should be 76.8
to maintain a 75
input impedance.
VMID
1
75
909
76.8
VEE
VIN
3V
–VS
+VS
VCC
10 F
0.1 F
10 F
+
–
+
–
+
AD8391
2
3
4
87
6
5
Figure 9. Driving Two Video Loads from the Same Source
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