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MGA-25203-BLKG Datasheet(PDF) 11 Page - AVAGO TECHNOLOGIES LIMITED |
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MGA-25203-BLKG Datasheet(HTML) 11 Page - AVAGO TECHNOLOGIES LIMITED |
11 / 15 page 11 Application Circuit MGA-25203 1 RF In 2 GND 3 GND 4 BCTRL GND 12 RF Out 11 GND 10 NC 9 BCTRL RF In RF Out 100pF 100pF BSPLY BSW Vdd1 100pF Vdd2 100pF 100pF 0.1uF 100pF 0.1uF 10uF 47uF 10uF 1 RF In 2 GND 3 GND 4 BCTRL GND 12 RF Out 11 GND 10 NC 9 Using 3.3V or 5V Supply and tying Vcc1, Vcc2, BSPLY and BCTRL Vbat Vcc1 Vcc2 BSPLY R1 R2 BCTRL 3.3V Example : R2 VBCTRL = *VBATT R1 + R2 40K 2.8V = *3.3V R1 + 40K R1 = 7K R2 = 40K Given : VBCTRL = 2.8V VBAT = 3.3V R2 = 40K R1 = ? 5.0V Example : R2 VBCTRL = *VBATT R1 + R2 20K 2.0V = *5.0V R1 + 20K R1 = 30K R2 = 20K Given : VBCTRL = 2.0V VBAT = 5.0V R2 = 20K R1 = ? Notes: BCTRL regulates the device current, thus R1 and R2 should have good tolerance rating. If available, a voltage regulator is the preferred method of bias. In this example we set R2 at 40KOhm and solve for R1 with simple voltage divider equation. Note this method will cause some leakage current through R2. |
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