FEATURES
Low cost 3.
3 V
CMOS MxFE™ for broadband applications DOCSIS, EURO-DOCSIS, DVB, DAVIC compliant 232 MHz quadrature digital upconverter 12-bit direct IF DAC (TxDAC+®) Up to 65 MHz carrier frequency DDS Programmable sampling clock rates Analog Tx output level adjust Dual 12-bit, 29 MSPS direct IF ADCs with video clamp input 10-bit, 29 MSPS sampling ADC 8-bit ∑-∆ auxiliary DAC Direct interface to AD832x family of PGA cable drivers
APPLICATIONS
Cable set-top boxes Cable and wireless modems
Mixed-Signal Front End for Broadband Applications
AD9878
TxID[5:0] SDIO
IF10[4:0]
IF12[11:0] FLAG[2:1]
FUNCTIONAL BLOCK DIAGRAM
I Tx Q
16
12
SINC–1
DAC
Tx
DDS 4
CONTROL REGISTERS
MUX
10 12
...