AD8328:  5 V Upstream Cable Line Driver

The AD8328 is a low cost amplifier designed for coaxial line driving. The features and specifications make the AD8328 ideally suited for MCNS-DOCSIS and EuroDOCSIS applications. The gain of the ...More

AD8328:  5 V Upstream Cable Line Driver

Product Description

The AD8328 is a low cost amplifier designed for coaxial line driving. The features and specifications make the AD8328 ideally suited for MCNS-DOCSIS and EuroDOCSIS applications. The gain of the AD8328 is digitally controlled. An 8-bit serial word determines the desired output gain over a 59 dB range, resulting in gain changes of 1 dB/LSB.

The AD8328 is packaged in a low cost 20-lead LFCSP and a 20-lead QSOP. The AD8328 operates from a single 5 V supply and has an operational temperature range of -40°C to +85°C.

Patent pending.

Features

  • Supports DOCSIS and EuroDOCSIS standards for reverse path transmission systems
  • Gain programmable in 1 dB steps over a 59 dB range
  • Low distortion at 60 dBmV output:
    –57.5 dBc SFDR at 21 MHz
    –54 dBc SFDR at 65 MHz
  • 5 V supply operation
  • Maintains 300 Ω output impedance Tx-enable and Tx-disable condition
  • Upper bandwidth: 107 MHz (full gain range)
  • Supports SPI interfaces
  • Output noise level @ minimum gain 1.2 nV/vHz

Diagrams

AD8328 Diagram
Functional Block Diagram for AD8328

Specifications

Application Cable
Function CATV Line Driver
Voltage Supply (V) 5
-3 dB BW (MHz) 107MHz
Package 20-Lead LFCSP,20-Lead QSOP
Distortion (dBc) -57dBc
Spectral Noise (nV/rtHz) 135nV/rtHz
Gain (dB) 59dB
Gain Low End (dB) -27.5dB
Gain High End (dB) +31.5dB

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Part# Application Function Minimum Gain (Acl) Pos Supply -3 dB BW (MHz) Slew Rate (V/us) Iout Drive (mA) Distortion (dBc) Spectral Noise (nV/rtHz) Price* (1000-4999)
AD45048 DSL Driver - - to - 65 55 230 -80 - $2.32
AD8260 Cable Powerline Driver/Receiver - - to - 180 620 310 -58 2.4 $3.84
AD8320 Cable CATV Line Driver n/a +12V to +5V 150 n/a n/a -57 53 -
AD8322 Cable CATV Line Driver - - to - 180 - - -58 64 $3.19
AD8324 Cable CATV Line Driver - - to - 100 - - -59 157 $1.73
AD8325 Cable CATV Line Driver - - to - 100 - - -57 56 $3.34
AD8326 Cable CATV Line Driver - - to - 100 - - -57 100 $3.95
AD8327 Cable CATV Line Driver - - to - 160 - - -63 64 $3.80
AD8328 Cable CATV Line Driver - - to - 107 - - -57 135 $1.92
AD8390A DSL Driver - +10V to +24V 45 260 400 -70 5 $1.16
AD8392A DSL Driver - +10V to +24V 37 515 500 -70 2.5 $2.82
AD8394 DSL Driver - +12V to +24V 35 300 350 -70 3 $2.07
AD8396 DSL Driver - +12V to +24V - - 840 -66 140 $1.97
ADA4310-1 - - 1