Low-distortion Upstream CATV Line Driver
High Power, Low Distortion Upstream CATV Line Driver ADA4320-1
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FEATURES
Supports CableLabs® DOCSIS ...
Description
High Power, Low Distortion Upstream CATV Line Driver ADA4320-1
www.DataSheet4U.com
FEATURES
Supports CableLabs® DOCSIS 3.0/2.0 and EuroDOCSIS 3.0/2.0 specifications for customer premises equipment (CPE) upstream transmission 5 V single-supply operation Excellent adjacent channel rejection performance −66 dBc ACPR for a single QPSK channel −63 dBc ACPR for 4× QAM64 channels Gain programmable in 1 dB steps over a 59 dB range Gain range: −27 dB to +32 dB Current-scaled output stage Low between-burst output noise level −70 dB mV in 160 kHz bandwidth Maintains constant output impedance in enable, disable, and sleep conditions Selectable low power modes 12 mA in Tx disable 12 μA in sleep mode (full power-down) 3-wire, SPI-compatible interface 4 mm × 5 mm 24-lead LFCSP, RoHS compliant
VIN–
FUNCTIONAL BLOCK DIAGRAM
VOUT+ DIFF OR SINGLE INPUT AMP VERNIER ATTENUATION CORE POWER AMP VOUT– 8 ZIN (SINGLE) = 320Ω ZIN (DIFF) = 640Ω DECODE 8 DATA LATCH ZOUT DIFF = 300Ω
VIN+
POWER-DOWN LOGIC
RAMP
ADA4320-1
8 SHIFT REGISTER TXEN SLEEP
08707-001
GND
DATEN SDATA CLK
Figure 1.
APPLICATIONS
DOCSIS 3.0 and EuroDOCSIS cable modems/E-MTAs DOCSIS 3.0 set-top boxes CATV telephony modems Coaxial or twisted pair line drivers
GENERAL DESCRIPTION
The ADA4320-1 is a high power, ultralow distortion amplifier designed for CATV reverse channel line driving. Its features and specifications make the ADA4320-1 ideally suited for DOCSIS 3.0and EuroDOCSIS 3.0-based applications. Both gain and output sta...
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