General Description
The MAX1003 is a dual, 6-bit analog-to-digital converter (ADC) that combines high-speed, low-power operation with a user-selectable input range, an internal reference, and a clock oscillator. The dual parallel ADCs are designed to convert in-phase (I) and quadrature (Q) analog signals into two 6-bit, offset-binary-coded digital outputs at sampling rates up to 90Msps. The ability to directly interface with baseband I and Q signals makes the MAX1003 ideal for use in direct-broadcast satellite, VSAT, and QAM16 demodulation applications.

Features
♦ Two Matched 6-Bit ADCs
♦ High Sampling Rate: 90Msps per ADC
♦ Low Power Dissipation: 350mW
♦ Excellent Dynamic Performance:
   5.85 ENOB with 20MHz Analog Input
   5.7 ENOB with 50MHz Analog Input
♦ ±1/4LSB INL and DNL (typ)
♦ Internal Bandgap Voltage Reference
♦ Internal Oscillator with Overdrive Capability
♦ 55MHz (-0.5dB) Bandwidth Input Amplifiers with
   True Differential Inputs
♦ User-Selectable Input Full-Scale Range
   (125mVp-p, 250mVp-p, or 500mVp-p)
♦ 1/4LSB Channel-to-Channel Offset Matching (typ)
♦ 0.1dB Gain and 0.5° Phase Matching (typ)
♦ Single-Ended or Differential Input Drive
♦ Flexible, 3.3V, CMOS-Compatible Digital Outputs

Applications
   Direct Broadcast Satellite (DBS) Receivers
   VSAT Receivers
   Wide Local Area Networks (WLANs)
   Cable Television Set-Top Boxes