Timestar™ TR15231N Technical Overview

The Timestar™ TR15231N Multimode single chip quad-band RF Transmitter built using Tropian's patented Polar Impact architecture for use in GSM/GPRS/EDGE handsets and terminals.

TR15231N Key Features

Provides integrated quad-band multimode support allowing customers to use their phone anywhere in the world
Industry-leading low power design extends battery life and reduces thermal impact increasing customer satisfaction with handset design.
EDGE Class 12 Transmit power of 29dBm at cellular bands delivering optimized performance & improved coverage
Unique, open loop, Polar Impact transmitter technology includes PA control, with ramp and burst controls stored digitally
Digital I/Q data interface, compatible with new generation DigRF basebands, allowing easy integration into handset design.

TR15231N Applications

The Timestar™ TR15231N is optimized for data intensive wireless devices including:

Smartphones
PDAs
PC modem cards

Timestar™ TR15231N Technical Details

Supports GSM850, EGSM900, DCS1800 and PCS1900 bands
Exceeds all ETSI/ANSI requirements for signal quality
Power efficiency of up to 40% in EDGE
Produces specification-compliant RF signals compatible with existing base station receivers
Manufactured in 0.25µm CMOS
8mm x 8mm, 56pin package
Multi-slot, bursted transmission for GPRS and E-GPRS supported with full dynamic control from slot to slot over power level and modulation type
Transmit section:
Designed upon Tropian's unique Polar Impact technology. It enables the implementation of a high performance polar transmit architecture that delivers unprecedented levels of battery efficiency, across both 8-PSK & GMSK modulation schemes. When operated in conjunction with a semi custom, quad band, saturated type power amplifier module it provides a complete solution for the transmit chain with outstanding spectral purity and very low error vector magnitude (EVM) performance.