详细描述
The RF3237 is a quad-band (GSM850/EGSM900/DCS1800/PCS1900) GSM/GPRS Class 12-compliant transmit module with four transmit/receive ports for UMTS use that also serve as GSM Rx ports. This transmit module builds upon RFMD's leading PowerStar® integrated power control technology, SOI (silicon-on-insulator) switch technology, and integrated transmit filtering for best-in-class harmonic performance. The results are high performance, reduced solution size, and ease of implementation. The device is designed for use as the final portion of the transmitter section in a GSM850/EGSM900/DCS1800/PCS1900/UMTS handset and eliminates the need for a PA-to-antenna switch module matching network. The device provides 50? matched input and output ports requiring no external matching components.
The RF3237 features RFMD's latest integrated power-flattening circuit, which significantly reduces current and power variation into load mismatch. Additionally, a VBATT tracking feature is incorporated to maintain switching performance as supply voltage decreases. The RF3237 also integrates an ESD filter to provide excellent ESD protection at the antenna port.
特点
High Efficiency at Rated POUT VBATT = 3.5V GSM850/EGSM900 = 43% DCS1800/PCS1900 = 36%
Integrated Power Flattening Circuit
Integrated VBATT Tracking Circuit
8kV Robust ESD Protection at Antenna Port
No External Routing
No External DC Blocking Needed on TRx Ports
Low TRx Insertion Loss for 3G Efficiency and Improved Rx Sensitivity
Four High Linearity TRX Ports
High TRx to TRx Isolation
0dBm to 6dBm Drive Level, >50dB of Dynamic Range