Timestar™ TR15431N Technical Overview

The Timestar TR15431N transceiver IC provides an optimized radio solution for GSM/GPRS/EDGE handsets using Tropian’s patented Polar Impact architecture for the transmitter in combination with the acknowledged advantages of a direct conversion receiver.

TR15431N - Key Features

• Quad-band multimode E-GPRS radio
• Enhanced RF power efficiency; Significantly reduce handset size and heating problems; Improve talk and standby times
• EDGE class 12 operation (236kbps uplink) with high RF output power (up to 29dBm at antenna for cellular bands from 3.6V Li-Ion supply)
• Better coverage and data rates leading to improved user experience and satisfaction. Allows operators to optimize network capacity
• Maintain signal quality even at higher RF output power levels. Excellent spectral purity eliminates Tx SAW
• Uses variant of simpler, saturated “GSM” type PA modules for reduced size & BoM cost advantage
• Unique, open loop, Polar Impact transmitter technology includes PA control, with ramp and burst controls stored digitally
• Direct conversion receive architecture. Rx sensitivity: -108dBm (EGSM900)
• Auto calibration and compensation for Rx DC offsets
• Analog I/Q data interface, compatible with most basebands, allowing easy integration into handset design