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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 I_S mode. This supply current can be set using a resistor on the I_ADJ pin. Two other pins (C₀ and C₁) can also be used to adjust supply current to one of four preset modes (full-I_S, 3/4-I_S, 1/2-I_S, 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.

Key Features

• 450mA output drive capability
• 44.4VP-P differential output drive into 100Ω
• ±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