General Description

The MAX2101 6-bit quadrature digitizer combines quadrature demodulation with analog-to-digital conversion on a single bipolar silicon die. This unique RF-to-BitsTM function bridges the gap between existing RF downconverters and CMOS digital signal processors (DSPs).

The MAX2101’s simple receiver subsystem is designed for digital communications systems such as those used in DBS, TVRO, WLAN, and other applications.

Features

♦ ADCs Provide Greater than 5.5 Effective Bits at fS = 60Msps, fIN = 15MHz

♦ Fully Integrated Lowpass Filters with Externally Variable Bandwidth (10MHz to 30MHz)

♦ 40dB Dynamic Range

♦ Integrated VCO and Quadrature Generation Network for I/Q Demodulation

♦ Divide-by-16 Prescaler for Oscillator PLL

♦ Programmable Counter for Variable Sample Rates

♦ Signal-Detection Function

♦ Selectable Offset Binary or Twos-Complement Output Data Format

♦ Automatic Baseband Offset Cancellation

Applications

Recovery of PSK and QAM Modulated RF Carriers

Direct-Broadcast Satellite (DBS) Systems

Television Receive-Only (TVRO) Systems

Cable Television (CATV) Systems

Wireless Local Area Networks (WLANs)