GENERAL DESCRIPTION

The AD9878 is a single-supply, cable modem/set-top box, mixed-signal front end. The device contains a transmit path interpolation filter, a complete quadrature digital upconverter, and a transmit DAC. The receive path contains dual 12-bit ADCs and a 10-bit ADC. All internally required clocks and an output system clock are generated by the phase-locked loop (PLL) from a single crystal oscillator or clock input.

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

AD9878屬于集成電路（IC） > 模擬前端（AFE）。亞德諾半導(dǎo)體技術(shù)有限公司制造生產(chǎn)的AD9878模擬前端（AFE）模擬前端 (AFE) 是一種用于信號(hào)調(diào)節(jié)的半導(dǎo)體器件，由模擬放大器、運(yùn)算放大器、濾波器和集成電路構(gòu)成。這種可配置功能塊能連接各種傳感器。分辨率范圍從 8 位至 42 位不等，通道數(shù)范圍為 1 至 256 個(gè)。