The ISL1534 is a dual channel differential amplifier designed
for driving full rate ADSL2+ signals at very low power
dissipation. The high drive capability of 450mA makes this
driver ideal for DMT designs. It contains two pairs of
wideband, high-voltage, current mode feedback amplifiers
designed on Intersil’s HS30 Bipolar SOI process for low
power consumption in DSL systems. The amplifiers have an
internal fixed gain, which helps eliminate both feedback and
gain resistors reducing board size and cost.
These drivers consuming typically 4mA per DSL channel of
total supply current. This supply current can be set using a
resistor on the IADJ pin. Two other pins (C0 and C1) can
also be used to adjust supply current to one of four pre-set
modes (full IS, 3/4 IS, 1/2 IS, and full power-down). C0 and
C1 inputs are design to pull high initially. Floating these
inputs will put the device in disable mode. This is contrary to
EL1528 where C0 and C1 inputs pull low initially and is in the
enable state when C0 and C1 pins are floated.
The device is supplied in a thermally-enhanced small
footprint (4mmx5mm) 24 Ld QFN packages. The ISL1534 is
specified for operation over the full -40°C to +85°C
temperature range.