It can be used in 2-way ranging or TDOA location systems to locate assets to a precision of 10 cm. It also supports data transfer at rates up to 6. Supports 6 RF bands from 3. Programmable transmitter output power? Fully coherent receiver for maximum range and accuracy? Supply voltage 2.
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It can be used in 2-way ranging or TDOA location systems to locate assets to a precision of 10 cm. It also supports data transfer at rates up to 6. Supports 6 RF bands from 3. Programmable transmitter output power? Fully coherent receiver for maximum range and accuracy?
Supply voltage 2. Low power consumption? SLEEP mode current 1? Data rates of kbps, kbps, 6. Maximum packet length of bytes for high data throughput applications? Integrated MAC support features? Supports 2-way ranging and TDOA? SPI interface to host processor? Small number of external components?
Supports precision location and data transfer concurrently? Asset location to a precision of 10 cm? High multipath fading immunity? Supports high tag densities in RTLS? Small PCB footprint allows costeffective hardware implementations? Long battery life minimises system lifetime cost Applications?
In this state the DW host interface clock is running off the In this state the internal clock generator is running and ready for use. The analog receiver and transmitter are powered down. Full speed SPI accesses may be used in this state. This is the lowest power state apart from the OFF state.
In this state SPI communication is not possible. Once the device has detected the wake up condition, the EXTON pin will be asserted and internal reference oscillator In this state the DW will wake up after a programmed sleep count. The low power oscillator is running and the internal sleep counter is active.
The sleep counter allows for periods from approximately ms to hours before the DW wakes up. The DW is actively looking for preamble or receiving a packet In this state the DW periodically enters the RX state, searches for preamble and if no preamble is found returns to the IDLE state. If preamble is detected it will stay in the RX state and demodulate the packet.
Can be used to lower overall power consumption. The DW is actively transmitting a packet For more information on operating states please refer to the user manual . This choice has implications for overall system power consumption and timing, see table below. Decawave Ltd Subject to change without notice Version 2.
C, All supplies centered on typical values. All currents referenced to 3. Lower data rates allow longer range communication but consume more power. Higher data rates consume less power but have a reduced communications range. For a given payload length, the following table shows two configurations of the DW The chip operates from a nominal 3. Some circuits in the chip are directly connected to the external 3. Other circuits are fed from a number of on-chip low-dropout regulators.
The outputs of these LDO regulators are brought out to pins of the chip for decoupling purposes. Refer to Figure 35 for further details. Using switching regulators can reduce system power consumption. In situations where the DW must be power-cycled the 3. In this scenario, power should only be reapplied to the DW when: -?
Decawave Ltd Subject to change without notice Ref T1 47? F Web Link Version 2. The values given in Figure 37 above are for example purposes only and may not apply to your design. Differential Microstrip Traces on Top Layer ?
All RF traces should be kept as short as possible and where possible impedance discontinuities should be avoided.
Where possible RF traces should cover component land patterns. A ? This can be realised as either ? In most cases a single-ended antenna will be used and a wideband balun will be required to convert from ? Figure 39 gives an example of a suggested RF section layout. In this example traces to the 12 pF series? After the 12 pF capacitors the traces are realized as 50?
Using this method, thin traces can be used to connect to DW and then wider traces can be used to connect to the antenna. Contact Decawave for further information. Information relating to reels shipped prior to that date may be obtained from Decawave. Antistatic with surface resistivity less than 1 x 10e12 Ohms per square.
W4 max C, packaged in a 48pin QFN package. Regulatory body in the EU charged with the management of the radio spectrum and the setting of regulations for devices that use it Regulatory body in the USA charged with the management of the radio spectrum and the setting of regulations for devices that use it. Defined in the context of the IEEE Pin of an IC that can be configured as an input or output under software control and has no specifically identified function. It is designed to serve professionals involved in all aspects of the electrical, electronic and computing fields and related areas of science and technology.
Circuit normally found at the front-end of a radio receiver designed to amplify very low level signals while keeping any added noise to as low a level as possible Physical radio channel configuration in which there is a direct line of sight between the transmitter and the receiver.
A technique allowing a signal to be driven by more than one device. Generally, each device is permitted to pull the signal to ground but when not doing so it must allow the signal to float. Devices should not drive the signal high so as to prevent contention with devices attempting to pull it low.
Physical radio channel configuration in which there is no direct line of sight between the transmitter and the receiver. Used to quantify very small relative proportions.
Generally used to refer to signals in the range of 3 kHz to GHz. In the context of a radio receiver, the term is generally used to refer to circuits in a receiver before down-conversion takes place and in a transmitter after up-conversion takes place. System intended to provide information on the location of various items in real-time. A crystal oscillator whose output frequency is very accurately maintained at its specified value over its specified temperature range of operation.
Method of measuring the physical distance between two radio units by exchanging messages between the units and noting the times of transmission and reception. Method of deriving information on the location of a transmitter.
The time of arrival of a transmission at two physically different locations whose clocks are synchronized is noted and the difference in the arrival times provides information on the location of the transmitter. A number of such TDOA measurements at different locations can be used to uniquely determine the position of the transmitter.
A radio scheme employing channel bandwidths of, or in excess of, MHz. This device is the first in a family of parts that will operate at data rates of kbps, kbps, 6.
Products ScenSor is a family of semiconductor radio communications products. The resulting silicon has a very wide range of applications for both Real Time Location Systems RTLS and Ultra Low Power Wireless Transceivers, including manufacturing, ePOS and retail, building automation, automotive, healthcare, lighting, security, transport, inventory, supply chain management and other industries. DW is the first in the Decawave ScenSor family of parts, operates at data rates of kbps, kbps and 6. Decawave has developed a genuinely disruptive IR-UWB technology, which addresses the next frontier of wireless technology: precise indoor location and communication. Not only that, it has done so in a standardised format, on a tiny chip, that uses little power.