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Bluetooth controller targets ultralow-power wireless sensing apps

Posted: 07 Jun 2012 ?? ?Print Version ?Bookmark and Share

Keywords:Bluetooth? controller? wireless sensing?

EM Microelectronic-Marin SA launches the EM9301 Bluetooth smart-qualified controller that is designed for ultralow-power wireless sensing, remote control and monitoring applications. Running on as little as 0.8V, the controller can be powered by a wide range of common single-cell batteries or energy harvesters such as solar cells, piezo-electric and electro-magnetic elements.

The EM9301 is Bluetooth smart qualified for single-mode master and slave applications and combines the PHY, Link layer and Host Controller Interface (HCI) layer in one flexible chip. In receive mode, the EM9301 requires only 16.5mA, while competing products consume up to 23mA.

An integrated DC/DC converter powers the EM9301 RF circuitry while concurrently delivering up to 100mA to an external device (e.g. sensors, external MCU, LED indicators, or displays & driver circuits). RF output power is programmable from +4dBm to -20dBm in 6 steps. The system power budget can be further optimized by putting the EM9301 in SLEEP or IDLE mode, where it consumes less than 1?A.

Design BOM and size can be reduced with the use of a 200 differential impedance PCB trace antenna. This cuts the need for matching, balun and antenna components.

When paired with a low-power host controller, the EM9301 offers a solution for most Bluetooth smart applications such as wireless health and fitness monitoring, electronic leashes, and smartphone-based sensing and controls.

The EM9301 is sampling now and is available in both die format and in a RoHS-compliant MLF-24 package. EM9301 device purchase includes a license-free Bluetooth smart stack for 8051, ARM Cortex-M0 or -M3 cores.

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