DATASHEET
ISL1539A FN6916
Rev 0.00
September 23, 2009 Dual Port VDSL2 Line Driver
The ISL1539A provides 4 internal wideband op amps
intended to be used as two pairs of differential line
drivers. The ISL1539A’s high bandwidth, 240MHz, and
ultra low distortion, -89dBc @ 1MHz, 2VP-P, support
the demanding MTPR requirements of emerging VDSL2
line driver designs. Less demanding requirements can
be met at very low quiescent powers using the supply
current adjustment features.
Each of the 4 internal op amps is a wideband current
feedback amplifier offering very high slew rate intrinsic
to that design using low quiescent current levels. Each
of the two pair of amplifiers (ports) can also be power
optimized to the application using two external
quiescent control logic pins. Full power is nominally
27.2mA/port with options of medium power cutback to
23mA/port, a low power condition at 13.5mA/port, and
an off state at <0.5mA/port. Added quiescent power
flexibility is provided through an external IADJ pin.
Grounding the pin gives the nominal currents listed …