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

 

Typical Applications

  Wireless digital audio

  Wireless Mouse and Keyboard

  2.4GHz ISM Band Communication System

  Wireless game pad

  Wireless toy