MAX2820/MAX2821 I/Q 2.5-2.4 GHz Transceivers

The MAX2820/MAX2821 are transceivers designed for applications operating in 802.1lb (11 Mb/s). The MAX2821 provides a shutdown mode and an analog reference voltage output. The MAX2820/MAX2821 are suitable for 802.1lb ll Mb/s WLAN, 802.1lb 22 Mb/s PBCC high-data-rate WLAN, 802.1la b dual-channel WLAN, and 2.4GHz ISM band radio applications. 

The main technical features are as follows: 

・Operating in 2.4～2.5 GHz ISM band; 

・CCK modulation method; 

・802.1lb (11 Mb/s CCK and 22 Mb/s PBCC) PHY compatible; 

・The transmission power control range is greater than 25 dB; 

・Receive AGC control range greater than 65 dB; 

・Receiver sensitivity is -97dBm (at 11 Mb/s); 

・Transmit power is 2 dBm (11 Mb/s CCK); 

・Power supply voltage is 2.7 to 3.6 V; 

・Direct up-conversion and down-conversion to complete RF to baseband conversion; 

・On-chip baseband low-pass filter is shared by both transmit and receive.

Application circuit diagram of MAX2820/MAX2821