PLUTO

www.DataSheet4U.com PLUTO Dual Mode CDMA/AMPS Baseband Interface Advance Information DS4722 - 1.8 July 1998 The PLUTO baseband interface circuit is designed for use in dual mode CDMA/AMPS digital cellular telephones. In the telephone, Pluto provides the interface between the radio (RF & IF) components and the baseband digital signal processor. Pluto is part of a complete chipset solution for CDMA phones entitled the Planet chipset. The receive (RX) section converts the analog in-phase and quadrature (I & Q) signals into equivalent digital signals whilst the transmit (TX) circuits perform the complementary function of translating digital baseband information into the analog equivalent signals required for the modulator in the radio circuits. VHF PLLS are also included for second RXLO and TXIF generation. PLUTO also contains a 4 channel general purpose ADC which is included for such purposes as environmental and signal strength monitoring. PIN 1 IDENT PIN 80 FEATURES s Dual mode AMPS/CDMA compatible s Low Power/Low Voltage operation s Standard baseband I and Q interface s 4 Input Auxiliary ADC s Synthesisers APPLICATIONS s Dual Mode CDMA/AMPs digital cellular telephones TXQ,TXQFM_MOD TXI,TXITXIF PD_RX PD_TX RXIF PIN 1 GP80 MP28 Figure 1 Pin connections - top view ABSOLUTE MAXIMUM RATINGS Supply voltage Voltage applied to any other pin Operating junction temperature Storage temperature ESD (human body model) ORDERING INFORMATION PLUTO/KG/GP1R ADC<3> ADC<1> FC_I I+,IBAL Q...