AD8391ARZ Analog Devices Inc, AD8391ARZ Datasheet - Page 14

• Manufacturer Part Number: AD8391ARZ
• Description: IC LINE DRVR XDSL PWR DWN 8SOIC
• Manufacturer: Analog Devices Inc
• Type: Driverr

Specifications of AD8391ARZ

• Number Of Drivers/receivers: 2/0
• Protocol: xDSL
• Voltage - Supply: 3 V ~ 12 V
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (3.9mm Width)
• For Use With: AD8391AR-EVAL - BOARD EVAL FOR AD8391
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

AD8391
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.
–14–
Video Driver
The AD8391 can be used as a noninverting amplifier by applying a
signal at the V
Figure 9 for an example circuit). The signal applied to the V
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
input impedance.
Figure 9. Driving Two Video Loads from the Same Source
V
IN
3V
76.8
909
909
MID
V
+V
–V
MID
pin and grounding the gain resistors (see
S
S
8
1
909
0.1 F
909
7
2
–
+
AD8391
+
–
V
V
3
6
EE
CC
5
4
0.1 F
0.1 F
+
+
10 F
10 F
75
75
to maintain a 75
75
75
REV. A
MID