AD8019| Datasheet

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FEATURES Low Distortion, High Output Current Amplifiers Operate from 12 V to 12 V Power Supplies, Ideal for High-Performance ADSL CPE, and xDSL Modems Low Power Operation 9 mA/Amp (Typ) Supply Current Digital (1-Bit) Power-Down Voltage Feedback Amplifiers Low Distortion Out-of-Band SFDR 80 dBc @ 100 kHz into 100 Line High Speed 175 MHz Bandwidth ( 3 dB), G = +1 400 V/ s Slew Rate High Dynamic Range VOUT to within 1.2 V of Power Supply APPLICATIONS ADSL, VDSL, HDSL, and Proprietary xDSL USB, PCI, PCMCIA Modems, and Customer Premise Equipment (CPE) PRODUCT DESCRIPTION 8-Lead SOIC (R-8)
OUT1 IN1 +IN1 VS
1 2 3 4

DSL Line Driver with Power-Down AD8019
PIN CONFIGURATIONS 14-Lead TSSOP (RU-14)
+VS OUT2 IN2 +IN2 NC OUT1 IN1 +IN1 VS PWDN NC
1 2 3 4 5 6 7

AD8019AR

8 7 6 5

AD8019ARU

14 13 12 11 10 9 8

NC +VS OUT2 IN2 +IN2 NC DGND

NC = NO CONNECT

The AD8019 is a low cost xDSL line driver optimized to drive a minimum of 13 dBm into a 100 load while delivering outstanding 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 supply 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 attenuation 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 line with 50 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.

10dB/DIV

80dBc

132.5

137.5 FREQUENCY kHz

142.5

Figure 1. Out-of-Band SFDR; VS = 12 V; 13 dBm Output Power into 200 , Upstream

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Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781/329-4700 www.analog.com Fax: 781/326-8703 Analog Devices, Inc., 2001