Features

• Fixed Voltage Gain Of 13

• 450 mA Peak Output Drive Capability

• ±5 V to ±12 V Dual Supplies Or 10 V to 24 V

Single Supply

• 44 Vp-p Differential Output Into a 100 Ω Load

• 40.5 Vp-p Differential Output Into a 60 Ω Load

• Low-power Disable Mode For Each Driver

• 4 mA Per Amplifier Quiescent Supply Current

• -75dBc THD With 1MHz Signal Into a 60 Ω load

• 16-pin (4 mm x 4 mm) QFN Package

• RoHS Compliant

Applications

• Dual Port Full Rate ADSL2+ Line Drivers

• HDSL Line Drivers

Description

The Le87251 is a dual channel differential amplifier

designed to drive full rate ADSL2+ signals with very

low power dissipation. The Le87251 contains two pairs

of wide band amplifiers designed with Zarlink’s HV30

Bipolar SOI process for low power consumption in

DSL systems. The amplifiers have an internal fixed

gain, which helps to eliminate external feedback and

gain setting resistors.

The drivers achieve better than -75 dB THD while

driving a 1MHz, 16Vp_p signal into a 60Ω load. The

amplifiers are enabled by forcing the ENAB/ENCD

pins to ground. Leaving the ENAB/ENCD pins floating

or forcing them high will disable the two amplifiers. The

ENAB and ENCD pins are pulled up to an internal 2.5V

through on-chip 50kΩ resistors.

Le87251 device is one of the most cost-effective and

high performance line drivers for xDSL2+ applications.