GENERAL DESCRIPTION

The AD45048 ADSL CPE line driver is a dual operational amplifier capable of driving high output current (230 mA); it features a rail-to-rail output stage that swings to within 0.5 V of the supply rails. The AD45048 rail-to-rail output stage surpasses the output voltage capability of typical emitter follower output stages and can deliver up to 23 V p-p differentially from a single 12 V supply in ADSL CPE line driving applications.

FEATURES

Dual op amp

Voltage feedback

Wide supply range: from 3.3 V to 24 V

Rail-to-rail output

  Output swing to within 0.5 V of supply rails @ 230 mA

  23 V p-p differential, RLOADof 50 Ω from 12 V supply

High output current

Linear output current of 230 mA peak into 25 Ω

  −68 dBc MTPR @ 15 dBm (100 Ω telephone line)

Low noise

  4.5 nV/√Hz voltage noise density @ 100 kHz

  1.5 pA/√Hz current noise density @ 100 kHz

High speed

  65 MHz bandwidth (AV= 1, −3 dB)

  55 V/μs slew rate (RLOAD= 25 Ω)

APPLICATIONS

Consumer xDSL modems

Twisted pair line drivers

ADSL CPE applications(Drop in replacement for TS613ID and EL1519CS)

Audio applications