REP016
Dual-Band Front End for Japanese Cellular CDMA at 110MHz IF
Overview
Design Resources
Design & Integration File
- Block Diagram of the Receive-Path Application
- Bill of Materials Pt 1
- Bill of Materials Pt 2
- Schematic of the MAX2323 Evaluation Kit with the MAX2325 IC Installed
Description
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.
Parts Used
Documentation & Resources
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REP016 Design Files3/3/2021ZIP112 K
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