TQ5631

The TQ5631 is a 3V, RFAmplifier/Mixer IC designed specifically for PCS band CDMA applications. It's RF performance meets the requirements of products designed to the IS-95 standards. The TQ5631 is designed to be used with the TQ3631 (CDMA LNA) which provides a complete CDMA receiver for 1900MHz phones.

The RFA/Mixer TQ5631 incorporates on-chip switches which determine gain select states. When used with the TQ3631 (CDMA LNA), four gain steps are available. The RF input port is internally matched to 50 Ω, greatly simplifying the design and keeping the number of external components to a minimum. The TQ5631 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 PCS band mobile phones.