ML2712

PRELIMINARY ML2712 2.4GHz RF Transceiver GENERAL DESCRIPTION The ML2712 combined with the ML2713 form a FSK (Frequency Shift Keying) 2.4 GHz radio chipset. The ML2712 contains the RF and PLL circuits for a half duplex radio transceiver solution for IEEE802.11 and other wireless communication protocols using the 2.4 GHz ISM band. The ML2712 is controlled using a three-wire programming interface and three control lines. The transmit circuits feature an RF down converter for a transmit frequency translation loop and a Wideband Phase Detector for a directly modulated VCO transmitter. An RF down converter mixer is provided for receive. All frequency generation circuits are integrated for the RF conversion, the 1LO VCO and PLL plus a 2LO VCO and PLL for use in dual conversion radios. In addition the ML2712 contains an 8 bit D/A & Comparator that may be used together as a tracking A/D for Received Signal Strength Indication measurement (RSSI). s s FEATURES 2.4GHz RF Down Converter Programmable 2.2GHz and 236MHz Frequency Synthesizers External VCO tank circuits for flexibility Compatibility with the OKI MSM7730 and similar baseband controllers Transmit Wideband Phase Comparator for closed loop transmitter with >5MHz loop bandwidth PLLs Programmable via 3 wire interface 48 pin TQFP 7mm body 3.0V to 5.5V operation s s s s s s APPLICATIONS s s s 2.4GHz Frequency Shift Key modulated radios PC Card & Flashcard Wireless Transceivers IEEE802.11FHSS Compatible 1 and 2Mbps Standard SIM...