Datasheet Analog Devices AD8391AR — 数据表

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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 xDSL Line Driver 3 V to 12 V with Power-Down AD8391
PIN CONFIGURATION 8-Lead SOIC (Thermal Coastline)
VMID IN1 1 PWDN 2 +VS 3 VOUT1
4 VS VS 8 7 6 5 IN2 VMID ­VS VOUT2 PRODUCT DESCRIPTION O 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 three-state maintains low amplifier output impedance), and shutdown (Logic 0 places amplifier outputs in a high impedance state). PWDN is referenced 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. UPSTREAM POWER ­ 10dB/DIV 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. B SO LE
EMPTY BIN 25 137.5 FREQUENCY ­ kHz 250 REV. A
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