The ISL1533 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. This process also
provides for very rugged protection against lightning induced
surges on the line.
These drivers achieve an MTPR distortion measurement of
better than 70dB, while consuming typically 5mA per DSL
channel of total supply current in 1/2 IS mode. 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 preset modes (full-IS, 3/4-IS, 1/2-IS, and full
power-down). The ISL1533 integrates 50k pull-up resistors
on C0 and C1 pins to initially disable the device.
The ISL1533 operates on ±5V to ±15V supplies and retains
its bandwidth and linearity over the complete supply range.
The device is supplied in a thermally-enhanced
20 Ld HTSSOP and the small footprint (4mmx5mm)
24 Ld QFN packages. The ISL1533 is specified for operation
over the full -40°C to +85°C temperature range.

Features
• 450mA output drive capability
• 44.4VP-P differential output drive into 100
• ±5V to ±15V supply operation
• MTPR of -70dB
• Operates down to supply current of 4mA per port
• Current control pins
• Channel separation
- 80dB @ 500kHz
• High ESD protection from lightning induced transients
• Pb-free (RoHS compliant)
• Surpasses GR1089, ANSI, and ETSI requirements

Applications
• Dual port ADSL2+ line drivers
• HDSL line drivers