GENERAL DESCRIPTION

The AD9865 is a mixed-signal front end (MxFE) IC for transceiver applications requiring Tx and Rx path functionality with data rates up to 80 MSPS. Its flexible digital interface, power saving modes, and high Tx-to-Rx isolation make it well suited for half- and full-duplex applications. The digital interface is extremely flexible allowing simple interfaces to digital back ends that support half- or full-duplex data transfers, thus

often allowing the AD9865 to replace discrete ADC and DAC solutions. Power saving modes include the ability to reduce power consumption of individual functional blocks, or to power down unused blocks in half-duplex applications.

FEATURES

Low cost 3.3 V CMOS MxFETM for broadband modems

10-bit D/A converter

  2×/4× interpolation filter

  200 MSPS DAC update rate

Integrated 23 dBm line driver with 19.5 dB gain control

10-bit, 80 MSPS A/D converter

−12 dB to +48 dB low noise RxPGA (< 3.0 nV/rtHz)

Third order, programmable low-pass filter

Flexible digital data path interface

  Half- and full-duplex operation

  Backward-compatible with AD9975 and AD9875

Various power-down/reduction modes

Internal clock multiplier (PLL)

2 auxiliary programmable clock outputs

Available in 64-lead chip scale package or bare die

APPLICATIONS

Powerline networking

VDSL and HPNA