CDMA IF VGAs and I/Q Demodulators with VCO and Synthesizer

Complete CDMA IF Subsystem

Please check latest availability status for a specific part variant.


The MAX2306/MAX2308/MAX2309 are IF receivers designed for dual-band, dual-mode, and single-mode N-CDMA and W-CDMA cellular phone systems. The signal path consists of a variable-gain amplifier (VGA) and I/Q demodulator. The devices feature guaranteed +2.7V operation, a gain control range of over 110dB, and high input IP3 (-31dBm at 35dB gain, 3.4dBm at -35dB gain).

Unlike similar devices, the MAX2306 family of receivers includes dual oscillators and synthesizers to form a self-contained IF subsystem. The synthesizer's reference and RF dividers are fully programmable through a 3-wire serial bus, enabling dual-band system architectures using any common reference and IF frequency. The differential baseband outputs have enough bandwidth to suit both N-CDMA and W-CDMA systems, and offer saturated output levels of 2.7Vp-p at a low +2.75V supply voltage. Including the low-noise voltage-controlled oscillator (VCO) and synthesizer, the MAX2306 draws only 26mA from a +2.75V supply in CDMA (differential IF) mode.

The MAX2306/MAX2308/MAX2309 are available in 28-pin QFN packages.

MAX2306, MAX2308, MAX2309: Functional Diagram MAX2306, MAX2308, MAX2309: Functional Diagram Enlarge+

Key Features

  • Complete IF Subsystem Includes VCO and Synthesizer
  • Supports Dual-Band, Triple-Mode Operation
  • VGA with >110dB Gain Control
  • Quadrature Demodulator
  • High Output Level (2.7V)
  • Programmable Charge-Pump Current
  • Supports Any IF Frequency Between 40MHz and 300MHz
  • 3-Wire Programmable Interface
  • Low Supply Voltage (+2.7V)
  • Applications/Uses

    • Globalstar Dual-Mode Handsets
    • Single/Dual/Triple-Mode CDMA Handsets
    • WCDMA Handsets
    • Wireless Data Links
    • Wireless Local Loop (WLL)
    Part NumberVSUPPLY
    ApplicationsBand/ Freq.
    (mm x mm)
    See Notes
    MAX2306 2.711.4 to 25.9
    Single, Dual and Triple Mode CDMA Handsets
    40 - 3005.0 x 5.0
    $4.73 @1k
    MAX2308 Single, Dual and Triple Mode CDMA Handsets70 - 300
    MAX2309 Single, Dual and Triple Mode CDMA Handsets70 - 300
    $3.92 @1k
    See All Cellular RF Receivers (3)
    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.

    MAX2306EVKIT: Evaluation Kit for the MAX2306, MAX2308, MAX2309
    MAX2308EVKIT: Evaluation Kit for the MAX2306, MAX2308, MAX2309
    MAX2309EVKIT: Evaluation Kit for the MAX2306, MAX2308, MAX2309

    CAD Symbols and Footprints

  • MAX2308ETI+
  • MAX2308ETI+T
  • Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C  

    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.

    Quality Management System >
    Environmental Management System >


    Related Resources