rf9957 RF Micro Devices, rf9957 Datasheet
rf9957
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rf9957 Summary of contents
Page 1
... CDMA/FM Cellular Systems • CDMA PCS Systems • Wireless Local Loop Systems Product Description The RF9957 is an integrated complete IF AGC amplifier and Quadrature Demodulator designed for the receive section of dual-mode CDMA/FM cellular and PCS appli- cations designed to amplify received IF signals, while providing 100dB of gain control range, and demodulate to baseband I and Q signals ...
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... RF9957 Absolute Maximum Ratings Parameter Supply Voltage Power Down Voltage ( Input RF Power Ambient Operating Temperature Storage Temperature Parameter Overall (Cascaded) Maximum Gain Minimum Gain Gain Variation vs. V and T CC Input IP3 7 Noise Figure IF Input Frequency Range IF Input Impedance I/Q Frequency Range ...
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... LO+ Same as pin 12, except complementary input. Rev C11 010622 Interface Schematic CDMA IN+ See pin 4. FM IN+ See pin 8. LO- (balanced is 800 ). The LO input may See pin 12. RF9957 BIAS BIAS 1200 1200 7 CDMA IN- BIAS BIAS 1200 1200 FM IN- BIAS BIAS ...
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... RF9957 Pin Function Description 14 IN SEL Selects between CDMA and FM mode. This is a digitally controlled input. A logic “high” ( VCC-0.7V (<0.5V There output in FM mode. The impedance on this pin is 30k . 15 Q OUT- Balanced Baseband Output of Q Mixer. This pin is internally DC biased and should be DC blocked externally ...
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... CC Pin Out VCC1 VCC2 VCC3 OUT- CDMA IN OUT+ CDMA IN GND GND 6 19 FL+ GND 7 18 FL GND FM IN OUT+ BG OUT OUT- DEC SEL LO LO+ RF9957 Interface Schematic 7-31 ...
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... RF9957 CDMA SAW Filter CDMA IN+ CDMA IN- FM IN+ 7 7-32 Applicat ion Schemat VCC1 VCC2 GC 23 100 nF 3 VCC3 I OUT- 22 100 nF 4 CDMA IN+ I OUT+ 21 680 5 CDMA IN- GND 20 6 GND FL GND FL IN+ GND 100 IN- ...
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... GND IN- Q OUT OUT Q OUT DEC IN SEL 14 C12 LO- LO 270 C13 9957400 Rev RF9957 R13 R15 P2-1 C25 100 nF C21 C22 R12 100 C30 R9 1.6 k 100 nF 820 P3-1 R11 CLC426 ...
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... RF9957 7 7-34 Evaluation Board Layout Board Size 3.025” x 3.025” Board Size 0.031”, Board Material FR-4 Rev C11 010622 ...
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... Rev C11 010622 RF9957 7 7-35 ...
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... RF9957 CDMA Cascade Conversion Gain versus Gain Control Voltage -10 -20 -30 -40 -50 -60 0.5 1 1.5 GC (V) CDMA IIP3 versus Gain (V =3.0V, 85MHz -10 -20 -30 -40 -50 -60 -60 -40 -20 0 Gain (dB) CDMA Noise Figure versus Gain (V =3.0V, 85MHz -60 -40 ...