Global navigation satellite system engine enables accurate location positioning in mobile devices
Wireless solutions specialist Telit Communications plc will be using the device for its Jupiter SE868-V2 module, which was launched at CTIA Wireless 2013 in Las Vegas. The 11 x 11 mm QFN packaged receiver module integrates 5e, TCXO, SAW and RTC oscillator into a small convenient package, accelerating time-to-market and reducing product development risks. CSR believes its advanced power saving modes make it extremely battery-power friendly and ideal for wearable and personal navigation applications.
SiRFstarV 5e offers a range of features to increase accuracy, improve time to first fix and preserve battery power to enable a better user experience. These include:
- InstantFix™ Extended Ephemeris (EE) — Devices without wireless connectivity, such as cameras, are able to overcome slow TTFF, a common annoyance for the end user. 5e is capable of autonomously forward predicting EE for three days locally, and for connected devices the solution supports server based EE for up to 31 day for GPS and up to 14 day GLONASS EE.
- Direct to battery capability — The GNSS chip can connect directly to a Lithium battery supply, enabling system cost reduction and increased power efficiency. This is implemented by an integrated switched PMU, reducing system level power and eBOM costs.
- Design flexibility for optimal solution cost — With clear attention to solution implementation, 5e is designed for small size and low power. For example, UART and SPI Flash drive levels are drivable from 1.8 V to 3.3 V, eliminating the need for level shifters and increasing implementation flexibility.
- Intelligent design — The 5e is designed to be optimised for low power battery operated devices. For instance, in asset tracking applications, the 5e engine will intelligently decide how long to try to acquire satellite signal based around its environment, saving a significant amount of battery power.
“The SiRFstarV 5e device allows our customers to select a high performance solution that will deliver end users a seamless navigation and location experience whatever the application,” says Dave Huntingford, Director of Location at CSR. “The fact that Telit has already seen the potential of SiRFstarV 5e and selected it for its Jupiter SE868-V2 module reflects the location accuracy benefits afforded by the 5e.”
SiRFstarV 5e is offered in a size optimal 0.4 mm pitch WLCSP and a 0.5 mm pitch BGA for low cost PCB applications.
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