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AD8019ARU-EVAL Scheda tecnica(PDF) 1 Page - Analog Devices |
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AD8019ARU-EVAL Scheda tecnica(HTML) 1 Page - Analog Devices |
1 / 20 page REV. 0 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. a AD8019 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 DSL Line Driver with Power-Down PIN CONFIGURATIONS 8 7 6 5 1 2 3 4 AD8019AR –IN1 OUT1 OUT2 +IN1 –VS +VS –IN2 +IN2 14 13 12 11 10 9 8 1 2 3 4 5 6 7 AD8019ARU NC = NO CONNECT DGND NC PWDN NC NC NC OUT1 –IN1 +IN1 –VS OUT2 +VS –IN2 +IN2 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 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. FREQUENCY – kHz 132.5 137.5 142.5 –80dBc Figure 1. Out-of-Band SFDR; VS = ±12 V; 13 dBm Output Power into 200 Ω, Upstream 8-Lead SOIC (R-8) 14-Lead TSSOP (RU-14) |
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