Designed, Built, Tested
Board pictured here has been fully assembled and tested.


Design Resources

Design & Integration Files

  • Schematic of MAX2323 Evaluation Kit
  • Bill of Materials Pt 1
  • Bill of Materials Pt 2
Download Design Files 130.02 K


Objective: To develop and measure this dual-band triple-mode front-end IC using only 85MHz IF centers for processing PCS, cellular CDMA, and cellular AMPS.

The MAX2323 offers a single-path output for cellular and PCS digital mixers. In this application, the object was to assess performance with a common low IF at 85.38MHz. The high IP2 performance of the PCS mixer combined with the rejection from the RF filter's band edge provided reasonable although not excellent 1/2 IF image rejection. This was an experimental prototype done to assess the limitations of the MAX2320, and the results were surprisingly good, even with a low IF at the PCS band.

The MAX2323 low-noise amplifier (LNA) plus mixer is designed for dual-band CDMA cellular-phone handsets, but it can also be used in dual-band TDMA, GSM, EDGE, or WCDMA applications. It differs from its predecessor (the MAX2320) by adding a third "mid-gain" state for the cellular-band LNA that improves sensitivity switchover and hysteresis margin. It also comes in a smaller package (28-QFN) and offers increased third-order input intercept.

Parts Used

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