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AD8391 Datasheet(PDF) 1 Page - Analog Devices |
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AD8391 Datasheet(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 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 AD8391 xDSL Line Driver 3 V to 12 V with Power-Down PRODUCT DESCRIPTION The AD8391 consists of two parallel, low cost xDSL line drive amplifiers capable of driving low distortion signals while running on both 3 V to 12 V single-supply or equivalent dual-supply rails. It is primarily intended for use in single-supply xDSL systems where low power is essential, such as line powered and battery backup systems. Each amplifier output drives more than 250 mA of current while maintaining –82 dBc of SFDR at 100 kHz on 12 V, outstanding performance for any xDSL CPE application. The AD8391 provides a flexible power-down feature consisting of a 1-pin digital control line. This allows biasing of the AD8391 to full power (Logic “1”), Standby (Logic “tri-state” maintains low amplifier output impedance), and Shutdown (Logic “0” places amplifier outputs in a high impedance state). PWDN is refer- enced to –VS. Fabricated on ADI’s high-speed XFCB process, the high bandwidth and fast slew rate of the AD8391 keep distortion to a minimum, while dissipating a minimum of power. The quiescent current of the AD8391 is low; 19 mA total static current draw. The AD8391 comes in a compact 8-lead SOIC “Thermal Coastline” package, and operates over the temperature range –40 °C to +85°C. FREQUENCY – kHz 25 250 137.5 EMPTY BIN Figure 1. Upstream Transit Spectrum with Empty Bin at 45 kHz; Line Power = 12.5 dBm into 100 Ω PIN CONFIGURATION 8-Lead SOIC (Thermal Coastline) IN2 VMID –VS VOUT2 1 2 3 4 IN1 PWDN +VS VOUT1 AD8391 VMID VS VS 8 7 6 5 FEATURES Ideal xDSL Line Driver for VoDSL or Low Power Applications such as USB, PCMCIA, or PCI-Based Customer Premise Equipment (CPE) High Output Voltage and Current Drive 340 mA Output Drive Current Low Power Operation 3 V to 12 V Power Supply Range 1-Pin Logic Controlled Standby, Shutdown Low Supply Current of 19 mA (Typical) Low Distortion –82 dBc SFDR, 12 V p-p into Differential 21 @ 100 kHz 4.5 nV/ √Hz Input Voltage Noise Density, 100 kHz Out-of-Band SFDR = –72 dBc, 144 kHz to 500 kHz, ZLINE = 100 , PLINE = 13.5 dBm High Speed 40 MHz Bandwidth (–3 dB) 375 V/ s Slew Rate APPLICATIONS VoDSL Modems xDSL USB, PCI, PCMCIA Cards Line Powered or Battery Backup xDSL Modems |
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