Abstract: Tune MAX2265 power amplifier for IS-95 requirements in the cellular band. Target specs are 28dB gain, +28dBm output power, -45dBc ACPR, and PAE 35%. Application note provides schematic and bill of materials. 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 MAX2264/MAX2265 Applications Technical Support Objective: To tune and measure the cellular-band performance of this low-cost CDMA RF power amplifier. The project requirement was to tune the MAX2265 to IS-95 CDMA in the cellular band (824 - 849MHz), with gain = 28dB, power-added efficiency (PAE) = 35%, and ACPR1 = -45dBc, all at Pout = +28dBm. The MAX2265 linear RF power amplifier is designed for U.S. cellular-band IS-95-based CDMA, PDC, and IS-136-based TDMA modulation formats. To improve its PAE, the MAX2265 offers a continuous-current throttle-back arrangement. In this way, the amplifier linearity (that is, adjacent-channel power ratio, or ACPR) is held relatively constant, whereas both the output power and the current drain are reduced. Thus, the desired linearity can be maintained, while improving low-output PAE, over a continuously variable output control range. Schematic of the MAX2265 Evaluation Kit (PDF, 48K) Bill of Materials, Part 1 Bill of Materials, Part 2 Performance Results of the MAX2265 Related Parts   APP 456: Sep 30, 2002 MAX2265 2.7V, Single-Supply, Cellular-Band Linear Power Amplifiers Full Data Sheet (PDF, 232kB) Free Samples 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 (35kB)  AN456, AN 456, APP456, Appnote456, Appnote 456