FEATURES
Low cost 3.
3 V
CMOS MxFE™ for MCNS-DOCSIS-, DVB-, DAVIC-compliant set-top box and cable modem applications
232 MHz quadrature digital upconverter 12-bit direct IF DAC (TxDAC+®) Up to 65 MHz carrier frequency DDS Programmable sampling clock rates Selectable interpolation filter Analog Tx output level adjust 12-bit, 33 MSPS direct IF ADC
Dual 8-bit, 16.
5 MSPS sampling IQ ADCs Two 12-bit Σ-Δ auxiliary DACs Direct interface to AD8321/AD8325 or
AD8322/AD8327 PGA cable driver
APPLICATIONS
Cable modems Set-top boxes Wireless modems
GENERAL DESCRIPTION
The AD9877 is a single-supply set-top box and cable modem mixed-signal front end.
The device contains a transmit path interpolation filter, ...