Low-Power, 90Msps, Dual 6-Bit ADC

Please check latest availability status for a specific part variant.


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.

The MAX1003 input amplifiers feature true differential inputs, a -0.5dB analog bandwidth of 55MHz, and user-programmable input full-scale ranges of 125mVp-p, 250mVp-p, or 500mVp-p. With an AC-coupled input signal, matching performance between input channels is typically better than 0.1dB gain, 1/4LSB offset, and 0.5° phase. Dynamic performance is 5.85 effective number of bits (ENOB) with a 20MHz analog input signal, or 5.7 ENOB with a 50MHz signal.

The MAX1003 operates with +5V analog and +3.3V digital supplies for easy interfacing to +3.3V-logic-compatible digital signal processors and microprocessors. It comes in a 36-pin SSOP package.
MAX1003: Functional Diagram MAX1003: Functional Diagram Enlarge+

Key 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


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

See parametric specs for High-Speed ADCs (> 5Msps) (50)

Part NumberInput Chan.Resolution
Sample Rate
AC Specs
Full Pwr. BW
max ≥@ fINminminmintypSee Notes
MAX1003 269020385.85370.250.255584
$4.86 @1k

Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

MAX1002EVKIT: Evaluation Kit for the MAX1002 and MAX1003
MAX1003EVKIT: Evaluation Kit for the MAX1002 and MAX1003

Technical Documents

Tutorial 686 QPSK Modulation Demystified
Product Reliability Reports: MAX1003.pdf 
Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C   Material Composition  

Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

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Related Resources

Type ID Title
Tutorial 686 QPSK Modulation Demystified