FN7522 Rev 3.00

Page 1 of 12

Apr 6, 2018

FN7522

Rev 3.00

Apr 6, 2018

ISL1557

xDSL Differential Line Driver

DATASHEET

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 25Ω load.

The ISL1557 is available in the thermally-enhanced 16 Ld QFN

and 10 Ld HMSOP package and is specified for operation

across the full -40°C to +85°C temperature range. The

ISL1557 has control pins C0 and C1 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.

Related Literature

For a full list of related documents, visit our website

• ISL1557 product page

Features

• 21dBm output power capability

• Drives up to 750mA from a +12V supply

• -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

- ISL1557IUEZ. . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.5V to 12V

- 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 and HDSL2 line drivers