REP020
Dual-Band Dual-Mode FE IC with Common 210MHz IF
Overview
Design Resources
Design & Integration File
- Block Diagram of the Receiver-Path Application
- Schematic of the MAX2323 Evaluation Kit
- Bill of Materials pt
- Bill of Materials pt 2
Description
The MAX2323 was developed with a single, digital, IF output port. Having a common 210MHz IF, both digital mixers' gain is still adequate for good receiver sensitivity, and their IP2 performance and other related parameters offer sufficient margin for meeting 1/2 IF and additional interferers in a CDMA handset. In this application, the MAX2323 was tested for and successfully applied to a CDMA dual-band dual-mode handset front-end design. The circuit modification requirement for this project was to retune the FM analog and the cellular/PCS digital mixers to 210MHz IF.
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 switchover hysteresis margin. It also comes in a smaller package (28-QFN) and offers increased third-order input intercept.
Parts Used
Documentation & Resources
-
REP020 Design Files3/3/2021ZIP128K
Support & Training
Search our knowledge base for answers to your technical questions. Our dedicated team of Applications Engineers are also available to answer your technical questions.