Low-power RF transceiver suits short-range wireless apps

Low-power RF transceiver suits short-range wireless apps

Suited for operation in the global 2.4-GHz ISM frequency band, the highly integrated ADF7241 RF transceiver enables support of the standard IEEE 802.15.4 PHY protocol at 250 kbits/s on a single chip. The transceiver’s low-power consumption of 19 mA in receive mode and 21.5 mA in transmit mode makes it effective for battery-powered systems such as wireless sensor networks, automatic meter reading, industrial wireless control, wireless audio and video, consumer electronics, and ZigBee applications.

The receive path of the part is based on a zero-IF architecture, while the transmit path is based on a closed-loop voltage-controlled-oscillator modulation scheme. The transceiver also features a flexible-port RF interface with support for switched-antenna diversity.

In order to optimize the system power consumption, the ADF7241 features a very-low-power custom 8-bit processor that supports a number of RF functions, including radio control and packet management. Housed in a 32-LFCS package, the device also features a high sensitivity of –95 dBm at 250 kbits/s and programmable output power: –20 to 4.8 dBm in 2-dB steps. ($1.98 ea/1,000 — available now.)

By Christina Nickolas

Analog Devices , Wilmington , MA
Sales 800-262-5643
www.analog.com