Catalog
xDSL Differential Line Driver
Key Features
• High-power differential output
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• Delivers signal strengths up to 21 dBm
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• Operates up to 12 V from a single supply or up to ±6 V from dual power supplies
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• Drive capability up to 750 mA from a single 12 V supply
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• User settable gain and bandwidth
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• Bandwidth up to 300 MHz
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• Class AB operation
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• Four operational states, low power operation
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• Thermal shutdown circuitry
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• Miniature 4 mm x 4 mm thermally enhanced package
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• RoHS compliant
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• Pin-compatible with industry standard line drivers
Description
AI
The Le87557 device is a single channel differential amplifier designed to drive full rate VDSL2, ADSL2+,
and PLC high-power signals. The Le87557 device contains a pair of wide-band amplifiers designed with
Microchip’s HV15 bipolar SOI process for high-power output with low power consumption.
Line driver gain is set externally to the device. The device can be powered from a single high-voltage
supply or from dual supplies.
The device can be programmed to one of three preset bias levels to optimize power and performance. In addition, the line driver features a power down state, which forces low-power and high-impedance mode for receive transmissions or for idle operations. The control pins respond to input levels that can be generated with a standard GPIO, but are tolerant of higher voltage logic levels. The Le87557device is available in a 16-pin (4 mm x 4 mm) QFN package with an exposed pad for enhanced thermal conductivity.