1
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FN7522.2
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ISL1557
xDSL Differential Line Driver
The ISL1557 is a dual operational amplifier designed for
VDSL2 and ADSL line driving in DMT based solutions. This
device features a high drive capability of 750mA while
consuming only 6mA of supply current per amplifier and
operating from a single 4.5V to 12V supply. The driver
achieves a typical distortion of -80dBc, at 150kHz into a 25
load.
The ISL1557 is available in the thermally-enhanced
16 Ld QFN and 10 Ld HMSOP package and is specified for
operation over the full -40°C to +85°C temperature range.
The ISL1557 has control pins C
0
and C
1
for controlling the
bias and enable/disable of the outputs. These controls allow
for lowering the power to fit the performance/power ratio for
the application.
The ISL1557 is ideal for ADSL2+, SDSL, HDSL2 and VDSL
line driving applications, including both 14.5dBm and 21dBm
applications.
Features
• 21dBm output power capability
• Drives up to 750mA from a +12V supply
•20V
P-P
differential output drive into 21
• -80dBc typical driver output distortion at full output at
150kHz
• -75dBc typical driver output distortion at 4MHz
• -71dBc typical driver output distortion at 10MHz
• -75dBc typical driver output distortion at 17MHz
• Low quiescent current of 6mA per amplifier
• Supply range
- For ISL1557IUEZ 4.5V to 12V
- For ISL1557IRZ ±2.25V to ±6V, 4.5V to 12V
• 300MHz bandwidth
• Thermal shutdown
• Pb-free (RoHS compliant)
Applications
• VDSL2 line drivers
• Power line communications line drivers
• ADSL2+ CPE line driving
• G.SHDSL, HDSL2 line drivers
Ordering Information
PART NUMBER
(Note)
PART
MARKING
TEMP.
RANGE (°C)
PACKAGE
(Pb-Free)
PKG.
DWG. #
ISL1557IRZ 155 7IRZ -40 to +85 16 Ld 4x4 QFN MDP0046
ISL1557IRZ-T7* 155 7IRZ -40 to +85 16 Ld 4x4 QFN (Tape and Reel) MDP0046
ISL1557IUEZ BBVAA -40 to +85 10 Ld HMSOP MDP0050
ISL1557IUEZ-T7* BBVAA -40 to +85 10 Ld HMSOP (Tape and Reel) MDP0050
*Please refer to TB347 for details on reel specifications
NOTE: These Intersil Pb-free plastic packaged products employ special Pb-free material sets; molding compounds/die attach materials and 100%
matte tin plate PLUS ANNEAL - e3 termination finish, which is RoHS compliant and compatible with both SnPb and Pb-free soldering operations.
Intersil Pb-free products are MSL classified at Pb-free peak reflow temperatures that meet or exceed the Pb-free requirements of IPC/JEDEC J
STD-020.
Data Sheet February 26, 2008
