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 at 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 pre-set modes (full IS, 3/4 IS, 1/2 IS, and full powerdown). 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 and a 20 Ld HTSSOP

packages. The ISL1534 is specified for operation over the

full -40°C to +85°C temperature range.

The ISL1534 provides larger output swing at heavy loads,

higher slew rate, and higher bandwidth while maintaining

pin-to-pin drop-in compatibility with the ISL1532A. The

ISL1534 integrates 50k pull-up resistors on C0 and C1 pins.

Features

• 450mA output drive capability

• 44.4VP-P differential output drive into 100Ω

• ±5V to ±15V supply operation

• Internal fixed gain and biasing network

• Reduces BOM by 7 resistors and 1 capacitor per channel

• Low differential input offset

• Channel separation

- 80dB @ 500kHz

- 75dB @ 1MHz

• Direct pin-to-pin replacement for ISL1532A

• Pb-free (RoHS compliant)

Applications

• Dual channel ADSL2+ line drivers

• SHDSL line drivers