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