GSM/DCS/TDMA/AMPS Multi-Protocol Transceiver

The MC13760 Multi–Protocol, Multi–Band Digital Transceiver IC combines, on a single Advanced BiCMOS chip, the major building blocks required for next generation multi–purpose, multi–band wireless products. The device includes the majority of the circuitry necessary for IF signal processing between the RF front end and the DSP and backend. The MC13760 contains two fractional–N synthesizers, a re–configurable zero IF receiver with programmable bandwidth, receive A/D conversion, multi–rate data interface to the baseband DSP, direct launch digital modulator, full transmit support circuits, and general purpose support circuits such as D/A and A/D converters, battery save and tri–state control switches

• Receiver Functions for all GSM/DCS/TDMA IS–136/AMPS Modes and Frequencies Including GPRS
• Direct Interface to Motorola Baseband Processors, such as the DSP56690 through a Common Programming and Data Interface
• Main Three Accumulator (24–Bit) Fractional–N Synthesizer
    • Resolution Capability of 6.0 Hz
    • Dual–Mode Charge Pump Output for TDMA TX VCO and all RX
    • Independent Charge Pump Output for the GSM/DCS TX VCO
    • GMSK Lookup ROM for Direct Transmission in GSM/DCS Mode
    • Digital 16–Bit Automatic Frequency Control
• Secondary Three Accumulator (24–Bit) Fractional–N Synthesizer for use as an Accurate Frequency–Corrected Clock in GSM, or as an Additional Low Frequency LO
• Coarse Tuning of the VCO(s) via a 6–Bit D/A with Adapt
• Operates at 2.75 V Deep Sleep Mode with Current as low as 50 µA
• Versatile Frequency Generation including Linear and Constant Envelope Modulation Paths, Ramp and Power Level Control, Direct Gain Control of the RFPA in the TDMA Mode
• D/A Conversion of TDMA TXI and TXQ
• Reference Crystal Oscillator with a Buffered Output, Compensation/Fine Tuning via 9–Bit D/A
• Receiver Gain Adjustment and Bandwidth Down to 6.0 kHz Programmed over the SPI Bus
• A/D Conversion of RXI and RXQ to 8–Bit or 10–Bit Resolution
• Types of Applications
    • GSM/DCS/TDMA/AMPS Global Roaming Multiband Cellular Telephone
    • VHF/UHF 2–Way or Trunked Radio, iDEN, Tetra, or Satellite Communication Radios or Telephones
    • Hand–Held Wireless PDA’s
    • Wireless LAN’s, Industrial Devices, ISM Band Products
    • Any New Device Containing Some Combination of the Above Functions