详细描述
The RF7234 is a high-power, high-efficiency, linear power amplifier designed for use as the final RF amplifier in 3V, 50Ω TD-SCDMA mobile cellular equipment and spread-spectrum systems. This PA is developed for TD-SCDMA 1880MHz to 1920MHz and 2010MHz to 2025MHz frequency band, plus W-CDMA Band 1. The RF7234 has two digital control pins to select one of three power modes to optimize performance and current drain at lower power levels. The part also has an integrated directional coupler which eliminates the need for an external discrete coupler at the output. The RF7234 is fully TD-SCDMA/W-CDMA/HSDPA-compliant and is assembled in a 10-pin, 3mmx3mm module.
特点
TD-SCDMA and HSDPA Compliant
Low Voltage Positive Bias Supply (3.4V to 4.2V)
+28dBm Linear Output Power W-CDMA (+26.5dBm HSDPA)
+27.5dBm Output Power TD-SCDMA
High Efficiency Operation 35% at POUT=+27.5dBm (TD-SCDMA)
20% at POUT=+19.0dBm (Without DC/DC Converter)
Low Quiescent Current in Low Power Mode: 17mA
Internal Voltage Regulator Eliminates the Need for External Reference Voltage (VREF)
3-Mode Power States with Digital Control Interface
Supports DC/DC Converter Operation
Integrated Power Coupler
Integrated Blocking and Collector Decoupling Capacitors