Four SOT23-8s Form CDMA Tri-Mode Receive Chipsets

May 1, 2000
Four highly integrated, 3V chips have been developed for providing true tri-mode, IS-95 CDMA operation in cell phones. Housed in tiny, SOT23-8 packages, the ICs consist of two LNAs and two downconvert mixers, with the TQ3631 RF LNA IC designed to work

Four highly integrated, 3V chips have been developed for providing true tri-mode, IS-95 CDMA operation in cell phones. Housed in tiny, SOT23-8 packages, the ICs consist of two LNAs and two downconvert mixers, with the TQ3631 RF LNA IC designed to work with the TQ5631 RF amplifier/mixer IC to provide a complete CDMA receiver for 1900-MHz phones, while the TQ3131 LNA mates with the TQ5131 mixer to form CDMA receivers for 800-MHz dual-mode phones.
Implementing the tri-mode design is said to be straightforward as mode, gain select and bypass switches are all integrated on-chip. And although designed for use in CDMA handsets, the chips can be used in pagers, WANs, and other products using the cellular or PCS frequency bands. The ICs cost $0.97 to $1.09 each/1000.

Company: TRIQUINT SEMICONDUCTOR INC.

Product URL: Click here for more information

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