rf9958 RF Micro Devices, rf9958 Datasheet
rf9958
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rf9958 Summary of contents
Page 1
... CDMA/FM Cellular Systems • CDMA PCS Systems • Wireless Local Loop Systems Product Description The RF9958 is an integrated complete Quadrature Modu- lator, IF AGC amplifier, and Upconverter designed for the transmit section of dual-mode CDMA/FM cellular and PCS applications designed to modulate baseband I ...
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... RF9958 Absolute Maximum Ratings Parameter Supply Voltage Power Down Voltage ( and Q Levels, per pin LO1 Level, balanced LO2 Level, balanced Operating Ambient Temperature Storage Temperature Parameter 5 I/Q Modulator & AGC I/Q Input Frequency Range I/Q Input Impedance I/Q Input Reference Level LO1/FM Frequency Range ...
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... Parameter Min. Power Supply Supply Voltage 2.7 Current Consumption Current Consumption Power Down Current VPD HIGH Voltage V -0.7 CC VPD LOW Voltage Rev B11 010720 Specification Unit Typ. Max. 3.0 3 0.5 V RF9958 Condition Modulator and AGC only, CDMA Mode Mixer Only 5-95 5 ...
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... RF9958 Pin Function Description 1 MODE Selects between CDMA and FM mode. This is a digitally controlled input. A logic “high” 0.5V amplifier and turns off the I&Q modulator. The impedance on this pin is 30k . A DC voltage less than or equal to the maximum allowable Vcc may be applied to this pin when no voltage is applied to the Vcc pins. ...
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... DC present filter is needed this pin may be con- nected to MOD OUT+ through a DC blocking capacitor. An appropriate matching network may be needed filter is used. Rev B11 010720 -0.7V), CC plus a series blocking/ CC output. imped- balanced impedance input to the mixer stage. RF9958 Interface Schematic 10 k PD1 PD2 450 V CC4 300 ...
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... RF9958 Pin Function Description 22 MIX IN+ Same as pin 21, except complementary input. 23 GND2 Same as pin 16. 24 MOD OUT- One half of the balanced AGC output port. The impedance of this port is 200 to the MIX IN- pin through a DC blocking capacitor. This pin requires an inductor to V gain, this inductor should be a high-Q type and should be parallel reso- nated out with a capacitor (see application schematic) ...
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... Rev B11 010720 RF9958 Pin-Out MODE 1 28 VCC2 Q SIG REF 3 26 DEC I REF 4 25 MOD OUT+ I SIG 5 24 MOD OUT- GND1 6 23 GND2 VCC1 7 22 MIX IN+ LO1 MIX IN- LO1 LO2- BG OUT 10 19 LO2+ VCC3 11 18 DEC GND1 ...
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... RF9958 Mode Select Q Signal Reference I Signal LO1/ Power Down 1 100 pF 5-100 Applicat ion Schemat ic 1 MODE VCC2 2 Q SIG REF DEC REF MOD OUT SIG MOD OUT- 6 GND1 GND2 VCC1 MIX IN+ 8 LO1+ MIX IN- ...
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... C17 2.2 nF MIX IN- 21 C12 100 pF LO2- 20 C18 100 pF LO2+ 19 C11 1000 pF DEC 18 C13 OUT GND2 16 PD2 RF9958 VCC MODE C10 strip MOD OUT J4 VCC 50 strip MIX strip LO2 ...
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... RF9958 5 5-102 Evaluation Board Layout 2.689" X 2.521" Rev B11 010720 ...
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... Rev B11 010720 RF9958 5 5-103 ...
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... RF9958 MODOUT Output Power versus Gain Control Voltage (V =3.0 V, 130 MHz) CC 10.0 0.0 -10.0 -20.0 -30.0 -40.0 -50.0 -60.0 -70.0 -80.0 -90.0 5 -100.0 0.5 1.0 GC (V) MODOUT IM3 Suppression versus Output Level (V =3.0 V, 130 MHz) CC 43.0 42.0 41.0 40.0 39.0 38.0 37.0 -18.0 -16.0 -14.0 -12.0 -10.0 MODOUT Output Level (dBm) 5-104 -100.0 -110.0 -120.0 -130.0 -140.0 -150.0 -160.0 +25° C -30° C +85° C -170.0 1 ...