Features and Benefits

  • Versions for U.S. 902MHz to 928MHz Band and European 868MHz Band
  • -7dBm to +23dBm Adjustable Differential RF Output Power
  • +23dBm Output Power at 4.5V, +20dBm Output Power at 3.0V
  • Support BPSK, OOK, ASK, and FM Modulations
  • Modulation Filter for Direct Sequence BPSK up to 8Mchips/s
  • Fully Integrated VCO with On-Chip Tank
  • Extremely Low Frequency Pulling for OOK Modulation (typ 60kHz peak, 5kHz RMS)
  • Integrated Frequency Synthesizer for up to 8 Channels (MAX2900)
  • +2.7V to +4.5V Supply Operation
  • Small 28-Pin QFN Package with Exposed Pad (5mm x 5mm)

Product Details

The MAX2900–MAX2904 complete single-chip 200mW transmitters are designed for use in the 868MHz/915MHz frequency bands. The MAX2900/MAX2901/MAX2902 are compliant with the FCC CFR47 part 15.247 902MHz to 928MHz ISM-band specifications. MAX2903/MAX2904 are compliant with the ETSI EN330-220 specification for the European 868MHz ISM band.

These transmitter ICs offer a high level of integration while minimizing the number of external components. This is achieved by full integration of the transmit modulator, power amplifier, RF VCO, 8-channel frequency synthesizer, and baseband PN sequence lowpass filter. By filtering the BPSK modulation, the spurious emissions are reduced, enabling up to eight independent transmit channels in the U.S. ISM band. Inputs are provided for spread-spectrum BPSK, ASK, and OOK. FM can be achieved by directly modulating the VCO. The devices are intended primarily for use with an external differential antenna.


  • Automatic Meter Reading
  • Wireless Building Control
  • Wireless Data Networks
  • Wireless Security Systems/Alarms
  • Wireless Sensors

Product Lifecycle icon-recommended Production

At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.

Evaluation Kits (5)

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ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well.  "Zero defects" for shipped products is always our goal.

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Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.