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SA2421 Datasheet(PDF) 2 Page - NXP Semiconductors |
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SA2421 Datasheet(HTML) 2 Page - NXP Semiconductors |
2 / 12 page Philips Semiconductors Product specification SA2421 2.45 GHz low voltage RF transceiver 2 2000 Mar 13 853-2189 23308 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. FEATURES • 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: 50–500 MHz • –10dBm typical LO input power • Improved LNA reverse isolation S12 • TSSOP24 package PIN CONFIGURATION 1 2 3 4 5 6 7 8 9 10 11 12 13 14 24 23 22 21 20 19 18 17 16 15 DH Package ATTEN SW Tx OUT GND Rx IN GND GND GND LNA OUT VCC GND GND Rx IF OUT GND LOP LNA IN GND GND Rx IF OUT Tx IF IN Tx IF IN Tx/Rx LOM VCC LO CHIP EN SR01756 Figure 1. Pin configuration APPLICATIONS • IEEE 802.11 (WLAN) • 2.45 GHz ISM band ORDERING INFORMATION DESCRIPTION TEMPERATURE RANGE ORDER CODE DWG # 24-Pin Plastic Thin Shrink Small Outline Package (Surface-mount, TSSOP) –40 °C to +85°C SA2421DH SOT355-1 BLOCK DIAGRAM 4 3 2 15 24 23 22 21 20 7 610 9 8 19 18 17 16 15 Tx/Rx GND LOP GND VCC Rx IN GND ATTEN SW CHIP EN GND GND LNA OUT GND LNA GND GND 12 11 14 13 LOM LO Tx OUT GND VCC LNA IN Rx IF OUT Rx IF OUT Tx IF IN Tx IF IN RX RX TX LO BUFFER BPF PRE-DRIVER ATTENUATOR SR01757 X1 Figure 2. SA2421 block diagram |
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