TQ5633

The TQ5633 is a 3V, RF Amplifier/Mixer IC designed specifically for PCS band CDMA applications. It's RF performance meets the requirements of products designed to the IS-95 standard. The TQ5633 is designed to be used with an IF frequency of 110MHz, and uses a balanced mixer to achieve ½ IF rejection. When used with the TQ3631 or TQ3632 (CDMA LNAs) it provides a complete CDMA receiver for 1900MHz phones.

The RF Amplifier/Mixer TQ5633 incorporates on-chip switches which determine two gain select states. The RF and LO input ports are internally matched to 50 Ω, greatly simplifying the design and keeping the number of external components to a minimum. The TQ5633 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.