Rapid Engineering Prototypes are real circuits that Maxim application engineers have built and measured in our labs. They can provide a starting point for new RF designs. They are not available as Evaluation Kits. Additional Information: Wireless Product Line Page Quick View Data Sheet for the MAX2323/MAX2325 Applications Technical Support Objective: To band-shift the RF matching from the U.S. to the Japanese cellular band, and to measure the performance of this CDMA dual-mode front-end IC. The MAX2325 application circuit was changed from its standard BOM for the U.S. cellular-band LNA and mixer RF matching, to meet the Japanese cellular band with 110MHz IF. In addition, measurements were made to ensure compatibility with the end-customer's requirements. The MAX2325's performance was found to be fully compliant to the data sheet specifications at U.S. cellular frequencies. A MAX2323 evaluation kit was used to evaluate the performance of the MAX2325, as it provides a superset of MAX2325 features. The MAX2325 low-noise amplifier (LNA) plus mixer is designed for single-band CDMA cellular-phone handsets, but it can also be used in 800-900MHz-band TDMA, GSM, or EDGE applications. It differs from its predecessor (the MAX2324) by adding a third "mid-gain" state for the LNA that improves switchover hysteresis margin. The MAX2325 also comes in a smaller package (28-QFN) and offers increased third-order input intercept. Block Diagram of a Receive-Path Application Bill of Materials, Part 1 Bill of Materials, Part 2 Schematic of the MAX2323 Evaluation Kit with the MAX2325 IC Installed (PDF, 58K) Related Parts   APP 447: Nov 01, 2000 MAX2325 Triple/Dual-Mode CDMA LNA/Mixers Full Data Sheet (PDF, 176kB) Automatic Updates Would you like to be automatically notified when new application notes are published in your areas of interest? Sign up for EE-Mail™. We Want Your Feedback!   Download, PDF Format (28kB)  AN447, AN 447, APP447, Appnote447, Appnote 447