Low-cost 2,4 GHz RF transceivers
28 October 2009
Telecoms, Datacoms, Wireless, IoT
Nordic Semiconductor has released a pair of low-cost one time programmable (OTP) variants of its nRF24LE1 and nRF24LU1+ 2,4 GHz ULP (ultra-low power) wireless system-on-chip (SoC) solutions: the nRF24LE1 OTP and nRF24LU1+ OTP.
Based on the same technology platform as the nRF24LE1 and nRF24LU1+ Flash products, the new OTPs still feature Nordic’s high-performance ULP nRF24L01+ transceiver core, enhanced 8051 microcontroller (MCU), low-power oscillators, hardware AES security, and a wide range of application peripherals and interfaces. Both devices integrate 16 KB of program OTP and 1 KB of data OTP. With a fully integrated charge pump, the OTP is writable from the chip’s MCU, enabling the data OTP to be used for emulating non-volatile memory when required (eg, to retain pairing information during a battery change).
The nRF24LE1 OTP and nRF24LU1+ OTP inherit the ULP operating characteristics of their Flash-based counterparts, enabling extended operation from small capacity batteries such as AAA or coin cell types. For example, current consumption of the nRF24LE1+ OTP while transmitting is just 11,1 mA (at 0 dBm output power) and peak receive current is 13,3 mA (at 2 Mbps). Average current is in the microampere range (for a typical low duty cycle operation).
The nRF24LE1 OTP integrates a fully-featured nRF24L01+ 2,4 GHz transceiver core including Nordic’s proven Enhanced ShockBurst hardware link layer. A wide range of peripherals and power saving modes support the RF protocol stack. A ULP 32 kHz crystal oscillator provides highly accurate timing for low report rate synchronous protocols and a 16 MHz RC oscillator provides fast startup times from idle. The 32 kHz oscillator can provide timing accurate enough for higher report rate protocols without requiring an external crystal. A security co-processor supports AES encrypted wireless communication. For the application layer the nRF24LE1 OTP offers a rich set of interfaces and peripherals including an SPI, 2-wire, UART, 12-bit ADC, PWM and an analog comparator.
The nRF24LU1+ OTP integrates an nRF24L01+ 2,4 GHz transceiver core, also including Nordic’s proven Enhanced ShockBurst hardware link layer. By integrating a Full-Speed USB 2.0 compliant device controller with an 8-bit microcontroller and an AES encryption engine, the device provides a single-chip USB dongle solution. This includes an integrated voltage regulator that allows the chip to be powered directly from a USB bus, removing the requirement for an external voltage regulator. The only external components the nRF24LU1+ OTP chip requires are a low-cost 16 MHz crystal, decoupling, matching network and antenna.
Further reading:
RF filters explained
RFiber Solutions
Telecoms, Datacoms, Wireless, IoT
As RF environments become increasingly crowded, RF filters play a critical role in maintaining signal quality, improving system performance, and ensuring reliable operation.
Read more...
GigaDevice expands optical communication portfolio
NuVision Electronics
Telecoms, Datacoms, Wireless, IoT
GigaDevice has introduced the new GD32E512 and GD32E252 series MCUs specifically designed for optical module applications.
Read more...
Industrial connectivity without compromise
Telecoms, Datacoms, Wireless, IoT
The IR315 combines 4G LTE, Wi-Fi, Ethernet, and VPN technologies into a rugged, industrial-grade platform that enables seamless connectivity across a wide range of applications.
Read more...
Module provides 4G LTE Cat 1 bis connectivity
Dizzy Enterprises
Telecoms, Datacoms, Wireless, IoT
Mikroe adds 4G LTE Cat 1 bis connectivity where reliable data transmission and low power consumption are critical with the GC02S1-EU2 module.
Read more...
Enabling next-generation FPGA and SDR innovation
RFiber Solutions
Telecoms, Datacoms, Wireless, IoT
Puzhi Electronic Technology has established itself as a dynamic provider of advanced ARM and FPGA-based solutions, delivering a comprehensive ecosystem of products designed for modern embedded and high-performance computing applications.
Read more...
Magnetic mount antenna takes the hassle out of 4G installations
iCorp Technologies
Telecoms, Datacoms, Wireless, IoT
Designed for fast, tool-free installation, the YECN022CA 4G magnetic mount whip monopole antenna gives wireless devices a dependable cellular link in the field, where installation time and signal reliability both matters.
Read more...
Engineering for failure: why resilient telemetry matters more than perfect connectivity
Editor's Choice Telecoms, Datacoms, Wireless, IoT
One of the biggest assumptions in modern tracking systems is that connectivity will always be available. From an engineering perspective, this creates an interesting problem.
Read more...
Wi-Fi and Bluetooth smart module series integrates intelligence
iCorp Technologies
Telecoms, Datacoms, Wireless, IoT
Quectel Wireless Solutions has expanded its smart module portfolio with the SH503FM, a new-generation series of Wi-Fi and Bluetooth smart modules.
Read more...
Powering smart sensor networks
CST Electronics
Telecoms, Datacoms, Wireless, IoT
NeoCortec’s NeoMesh wireless mesh networking protocol and software stack is ideally suited for powering smart sensor networks where each device is required to send and receive small packets of data infrequently, but with high reliability.
Read more...
Lessons in long-distance telemetry
Omniflex Remote Monitoring Specialists
Telecoms, Datacoms, Wireless, IoT
Ian Loudon, international sales and marketing manager at Omniflex, reflects on some of the key engineering lessons learned from decades of deploying wireless telemetry systems in demanding industrial applications.
Read more...
printer friendly version