2,4 GHZ low IF 1,5 Mbps transceiver
14 August 2002
Telecoms, Datacoms, Wireless, IoT
The ML2725 from Micro Linear can be used as a single chip direct sequence spread spectrum (DSSS) telephone transceiver or general purpose frequency shift keying (FSK) radio transceiver. It is designed to work in frequency ranges of 2,4 GHz. The device integrates the frequency generation, receive and transmit functions for data rates up to 1,5 Mbps.
The ML2725 contains a proprietary dual conversion low IF receiver with all channel selectivity. The first mixer converts the 2,4 GHz RF input signal to a high IF of 800 MHz. An image reject mixer brings the 800 MHz IF signal down to a low IF frequency of 1,024 MHz, so all IF filtering, IF gain, and demodulation is performed at 1,024 MHz. This provides all the benefits of direct conversion to baseband and minimises the need for RF filtering. Also, the ML2725 can operate with either a low cost LC filter or a SAW filter.
A single 1,6 GHz synthesizer is used for both the receiver LO and the transmitter signal generation. The VCO and PLL are completely integrated, including the VCO resonator and tuning circuits. On transmit, the ML2725 is intended to be used with an external frequency tripler. The transmit output frequency is nominally 800 MHz, with a typical output power of 0 dBm. Transmit data is used to frequency modulate the VCO with the synthesizer open loop. The transmit data filter and modulation compensation circuits are also integrated.
The ML2725 contains its own DC regulation which allows the IC to operate over a wide power supply voltage range. It also has a simple baseband interface for transmit power management, PLL control and detection, and RSSI.
Further reading:
SMT-mountable card connectors
Telecoms, Datacoms, Wireless, IoT
Würth Elektronik introduces four new SMT-mountable Nano SIM and microSD card connectors and expands its range with solutions for the smallest packages.
Read more...
Module for smart city and smart utility devices
iCorp Technologies
Telecoms, Datacoms, Wireless, IoT
Quectel Wireless Solutions has launched the Quectel KCM0A5S, a high-performance Wi-SUN module designed for smart applications such as street lighting, precision agriculture, industrial IoT, smart meters and smart cities.
Read more...
Ultra-low-power wireless module
Altron Arrow
Telecoms, Datacoms, Wireless, IoT
The STM32WBA5MMG from STMicroelectronics is an ultra-low-power, small form factor, certified 2,4 GHz wireless module that supports Bluetooth LE, Zigbee 3.0, OpenThread, and IEEE 802.15.4 proprietary protocols.
Read more...
Quectel partners with GEODNET
Quectel Wireless Solutions
Telecoms, Datacoms, Wireless, IoT
Quectel Wireless Solutions has partnered with GEODNET to deliver Quectel’s Real-Time Kinematic (RTK) correction services, enabling high-precision positioning for IoT applications.
Read more...
Bringing Bluetooth Channel Sounding to automotive and beyond with KW47
Altron Arrow
Telecoms, Datacoms, Wireless, IoT
NXP’s new Channel Sounding-certified KW47 and MCX W72 wireless MCUs are set to help automakers with distance measurement, bringing an additional ranging solution for car access and autonomous systems, and will be utilised across a broader spectrum of applications.
Read more...
Dual-band GNSS antenna
RF Design
Telecoms, Datacoms, Wireless, IoT
The Taoglas Accura GVLB258.A, is a passive, dual-band GNSS L1/L5, high-performance antenna for high precision GNSS accuracy and fast positioning.
Read more...
What is Wi-Fi HaLow and why choose it for IoT?
iCorp Technologies
Editor's Choice Telecoms, Datacoms, Wireless, IoT
Wi-Fi HaLow introduces a low power connectivity option that, in contrast to other Wi-Fi options, offers greater range of approximately 1 km, which opens up a raft of IoT use cases.
Read more...
Wi-Fi 6 and Bluetooth LE coprocessor module
Altron Arrow
Telecoms, Datacoms, Wireless, IoT
The ST67W611M1 from STMicroelectronics boasts an all-in-one design which, together with its capabilities, contribute to making it an attractive choice for IoT edge devices requiring a single-chip solution.
Read more...
Futureproofing IoT connectivity
SIMcontrol
Telecoms, Datacoms, Wireless, IoT
A managed private APN assigns every device to an isolated carrier slice, producing a single ingress to the enterprise network, with traffic bypassing shared internet paths and reducing exposure.
Read more...
Extra slim 2,4 GHz radio module
Telecoms, Datacoms, Wireless, IoT
The Thyone I radio module from Würth Elektronik now has a little sibling: Thyone-e, which takes up 30% less space and represents a cost-effective alternative for applications in which the long-range mode is not required.
Read more...