TQ3631

WIRELESS COMMUNICATIONS DIVISION TQ3631 C2 Control Logic C2 L1 DATA SHEET VDD GND GND 3V PCS Band CDMA LNA IC RF IN LNA gnd RF 50 ohm OUT RF Out Control Logic C3 Features Small size: SOT23-8 Single 3V operation Low-current operation Product Description The TQ3631 is a 3V, RF LNA IC designed specifically for PCS band CDMA applications. It’s RF performance meets the requirements of products designed to the IS-95 specifications. The TQ3631 is designed to be used with the TQ5631 (CDMA mixer) which provides a complete CDMA receiver for 1900MHz phones. The LNA incorporates on-chip switches which determine high, low and bypass mode select. When used with the TQ5631 (CDMA RFA/mixer), four gain steps are available for use which provide low current/high IP3 and gain. The RF output port is internally matched to 50 Ω, greatly simplifying the design and minimizing the number of external components. The TQ3631 achieves excellent RF performance with low current consumption, supporting long standby and talk times in portable applications. Coupled with the very small SOT23-8 package, the part is ideally suited for PCS band mobile phones. Electrical Specifications1 Parameter Frequency Gain Noise Figure Input 3rd Order Intercept DC supply Current Min Typ 1960 13.0 1.5 10.0 11.0 Max Units MHz dB dB dBm mA Gain Select High IP3 performance Few external components Applications IS-95 CDMA PCS Mobile Phones Note 1: Test Conditions: Vdd=2.8V, RF=1960MHz, Tc=25C, CDMA High Gain state. F...