AD8019

The AD8019 is a low cost xDSL line driver optimized to drive a minimum of 13 dBm into a 100 Ω load while delivering outstand- ing distortion performance. The AD8019 is designed on a 24 V high-speed bipolar process enabling the use of ± 12 V power supplies or 12 V only. When operating from a single 12 V sup- ply the highly efficient amplifier architecture can typically deliver 170 mA output current into low impedance loads through a 1:2 turns ratio transformer. Hybrid designs using ±12 V supplies enable the use of a 1:1 turns ratio transformer, minimizing attenu- ation of the receive signal. The AD8019 typically draws 9 mA/ amplifier quiescent current. A 1-bit digital power down feature reduces the quiescent current to approximately 1.6 mA/amplifier. 

Figure 1 shows typical Out of Band SFDR performance under ADSL CPE (upstream) conditions. SFDR is measured while driving a 13 dBm ADSL DMT signal into a 100 Ω line with 50 Ω back termination. 

The AD8019 comes in thermally enhanced 8-lead SOIC and 14-lead TSSOP packages. The 8-lead SOIC is pin-compatible with the AD8017 12 V line driver.