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STPAC01F2 Scheda tecnica(PDF) 1 Page - STMicroelectronics |
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STPAC01F2 Scheda tecnica(HTML) 1 Page - STMicroelectronics |
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1 / 7 page ![]() April 2008 Rev 2 1/7 7 STPAC01F2 IPAD™, RF detector for power amplifier control Features ■ STPAC01F2 has two outputs – one for the signal detection – one for the temperature compensation ■ VDCout = 0.88 V at 0.85 GHz at 10 dBm ■ VDCout = 1.07 V at 1.85 GHz at 10 dBm ■ Vsupply = 5 V max ■ Lead-free package Benefit ■ The use of IPAD technology allows the RF front-end designer to save PCB area and to drastically reduce parasitic inductances. Applications Target applications are cellular phones and PDA using GSM, DCS, PCS, AMPS, TDMA, CDMA and 800 MHz to 1900 MHz frequency ranges. Description The STPAC01F2 is an integrated RF detector for the power control stage. It converts RF signal coming from the coupler into a DC signal usable by the digital stage. It is based on the use of two similar diodes, one providing the signal detection while the second one is used to provide temperature information to a thermal compensation stage. A biasing stage suppresses the detection diode drop voltage effect. Figure 1. Pin layout (bump side) Figure 2. Functional diagram TM: IPAD is a trademark of STMicroelectronics. Flip Chip (8 bumps) Gnd1 RFin Gnd1 Gnd1 Gnd2 Bias DC out V Temp 32 1 A B C Coupler GND2 GND1 VDCOut STPAC01F2 RF input VBIAS Vtemp Thermal compensation Low pass filter RF detector www.st.com |
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