TQ3131

WIRELESS COMMUNICATIONS DIVISION TQ3131 C2 Control Logic C2 L1 DATA SHEET VDD GND GND 3V Cellular Band CDMA/AMPS LNA IC RF IN RF 50 ohm OUT RF Out Control Logic GND C3 Features Small size: SOT23-8 Single 3V operation Low-current operation Product Description The TQ3131 is a 3V, RF LNA IC designed specifically for Cellular band CDMA/AMPS applications. It’s RF performance meets the requirements of products designed to the IS-95 and AMPS standards. The TQ3131 is designed to be used with the TQ5131 (CDMA/AMPS mixer) which provides a complete CDMA receiver for 800MHz dual-mode phones. The LNA incorporates on-chip switches which determine CDMA, AMPS, and bypass mode select. When used with the TQ5131 (CDMA RFA/mixer), four gain states are available. The RF output port is internally matched to 50 Ω, greatly simplifying the design and keeping the number of external components to a minimum. The TQ3131 achieves good RF performance with low current consumption, supporting long standby times in portable applications. Coupled with the very small SOT23-8 package, the part is ideally suited for Cellular band mobile phones. Electrical Specifications1 Parameter Frequency Gain Noise Figure Input 3rd Order Intercept DC supply Current Min 832 13.0 1.4 10.0 10.5 Typ Max 894 Units MHz dB dB dBm mA Gain Select Mode Select High IP3 performance Few external components Applications IS-95 CDMA Mobile Phones AMPS Mobile Phones Dual Mode CDMA Cellular applications 832-870MHz CDMA applicatio...