SA2421

INTEGRATED CIRCUITS SA2421 2.45 GHz low voltage RF transceiver Product specification Supersedes data of 2000 Feb 11 2000 Mar 13 Philips Semiconductors Philips Semiconductors Product specification 2.45 GHz low voltage RF transceiver SA2421 DESCRIPTION The SA2421 transceiver is a combined low–noise amplifier, receive mixer, transmit mixer and LO buffer IC designed using a 20 GHz fT BiCMOS process, QUBiC2, for high–performance low–power communication systems for 2.4–2.5 GHz applications. The LNA has a 3.2 dB noise figure at 2.45 GHz with 14.3 dB gain and an IP3 intercept of –3 dBm at the input. The wide–dynamic–range receive mixer has a 11.2 dB noise figure and an input IP3 of +2.5 dBm at 2.45 GHz. The nominal current drawn from a single 3 V supply is 34 mA in transmit mode and 20 mA in receive mode. The SA2421 differs from the SA2420 by removal of the LO doubler and LO switch. The LNA reverse isolation is improved, and a separate pin is allocated for the transmit output. PIN CONFIGURATION DH Package GND LNA IN GND GND Rx IF OUT Rx IF OUT Tx IF IN Tx IF IN GND 1 2 3 4 5 6 7 8 9 10 11 12 24 VCC 23 LNA OUT 22 GND 21 ATTEN SW 20 GND 19 Rx IN 18 GND 17 Tx OUT 16 GND 15 GND 14 VCC LO 13 CHIP EN FEATURES LOP Tx/Rx LOM Low current consumption: 34 mA nominal transmit mode and 20 mA nominal receive mode High system power gain: 24 dB (LNA + Mixer) at 2.45 GHz Excellent gain stability versus temperature and supply voltage Separate Rx IN and Tx OUT pins Wide IF range: ...