A7121

A7121 Preliminary Typical Applications Wireless digital audio Wireless Mouse and Keyboard 2.4GHz ISM Band Communication System 2.4GHz GFSK Transceiver Wireless game pad Wireless toy General Description A7121 is a monolithic CMOS integrated circuit for wireless applications in 2.4GHz ISM band. The device is provided in a 32-lead plastic QFN5X5 packaging and is designed as a complete GFSK transceiver up to 3Mbps data rate. The chip features a fully programmable frequency synthesizer with integrated VCO circuitry. Features 2400MHz~2484MHz worldwide license free frequency band Up to 79 selectable channels 2.2 V – 2.8 V voltage supply Programmable output power up to 0dBm Channel switching time < 200us 1 or 3Mbps high speed data rate -20 ºC to 85 ºC operating temperature -87dBm sensitivity Direct / FIFO mode operation Modem interface for low speed, low cost microcontroller Low IF architecture with few external components Pin Configurations SP I _ TXD SP I _RXD 26 SP I _ CS BP _ LP F SP I _ CLK BP _ DS VDD _ D 25 32 RSS I 31 30 29 28 27 BP _ L I M 2 BP _ L I M1 BP _ BPF V DD _ A RF I RFO V DD _ VCO BP _ VCO 1 2 3 4 5 6 7 24 23 22 RX _ C L K RX _ SYN CD _ TXEN TRXD TXD F _ CL K REST EN MS0 A7121 10 11 12 13 14 15 BB _CL K 16 21 20 19 18 17 8 9 VDD _ P L L QFN Package Top View PRELIMINARY (Mar. 2005, Version 0.6) F P _ RDY MS 1 CPO XS VT XI 1 AMIC Technology, Corp. A7121 Application Circuit Important Notice: AMIC reserves the right to make changes to its...