Transceivers With Embedded MCU&ADC Produced by Nordic

Published:2011/7/25 2:08:00 Author:Phyllis From:SeekIC

The nRF905 transceiver and the nRF9E5 transceiver with MCU, ADC are launched by the Nordic VLSI ASA. The nRF9X5 components are designed for 430-950 MHz wireless transceiver applications in both industrial and domestic environments. Especially in security systems, wireless data transfer, automatic meter reading, car alarm systems, point-of-sale systems, sensors and various telemetry systems. The nRF9E5 and nRF905 are manufactured in an ultra modern 0.18-um CMOS process. The entire transceiver refers to all inductors and filters integrated in a single chip.

The nRF9E5 transceiver has an embedded 8051 compatible MCU, and 4-input 10-bit ADC – for the first time providing the market with a complete low cost wireless system-on-a-chip solution with a single 1.9V-3.6V supply. Voltage regulators are embedded on-chip to further lower the system cost, and to enhance performance. It is highly integrated and low cost low power multiband sub 1-GHz RF SoC for the 433/868/915 MHz ISM (Industrial Scientific and Medical) band, which includes a sub 1-GHz RF transceiver core, 8-bit CPU, and RAM code memory. With its rich set of on-chip analog and digital peripherals, the nRF9E5 is an ideal low cost, flexible, single chip, low power solution for a long range of wireless applications.

Both components include the unique ShockBurst™ feature that is used in both receive and transmit mode and greatly simplifies software and protocol design. ShockBurst™ include features for CRC computation in both TX and RX mode, and address decoding in RX mode, greatly reducing the load and cost of the MCU running the RF protocol, compared to existing transceivers in the market. A crystal and a resistor are the two components needed externally to make up a complete system around the nRF905. The nRF9E5 requires an external EEPROM for external program storage. Both components are delivered in a ‘Green’ lead-free 32 pin 5×5mm QFN package.

The ShockBurst™ makes it possible to use the high data rate offered by the nRF905 without the need of a costly, high-speed micro controller for data processing or clock recovery. By placing all high speed signal processing related to RF protocol on-chip, the nRF905 offers the application micro controller a simple SPI interface, the data rate is decided by the interface-speed the micro controller itself sets up. By allowing the digital part of the application to run a low speed, while maximizing the data rate on the RF link, the nRF905 ShockBurst™ mode reduces the average current consumption in applications.

A unique feature of the nRF9X5 family is its ability to operate with the same layout and identical external components in the unlicensed European 868 MHz ISM band as well as the North-American 915 MHz SRD band, easing logistics and lowering cost for manufacturers who have customers in both territories.

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