RF transceiver enables 'minimalist wireless modems'

17 November 2004 Telecoms, Datacoms, Wireless, IoT

"The miniature wireless modem end-product is now a reality," announced CML Microcircuits as it launched its new time, space and component-saving wireless data IC, the CMX990.

A single-chip GMSK packet-data modem with RF transceiver, this innovative half-duplex IC offers: a versatile baseband modem, IF and RF processing functions, programmable synthesizers, signal level-setting functions and comprehensive on-chip and peripheral control, monitoring and interfacing.

With a data rate of 4 to 16 Kbps with selectable BT values, at RF frequencies of 400 MHz to 1 GHz, the CMX990 is formattable to both freeformat and packet data schemes, is fully Mobitex-compatible and can be set to comply with EN 300 113 and FCC CFR 47 Part 90 standards. Fomattable to freeformat or packet operations, the CMX990 uses simple task-command configuration to provide simplicity and efficiency to the control and operation of the modem. FEC, CRC, data scrambling and interleaving functions are available. Automatic Rx clock extraction and signal level measurement and compensation allow the CMX990 modem to operate in all signal conditions.

Employing external VCO inputs, two programmable on-chip synthesisers provide all the frequencies necessary for wireless data operation. Addressable on-chip DACs and ADCs are available for control and monitoring of a wide range of external functions, including system levels and the VCO loops, with separate dedicated functions for RF PA stage and TCXO control.

The CMX990 operates on 3 volts and is available in a 'no-leads' 64 VQFN package. Two separate full-feature PCB-based kits are available: the EV9900 to demonstrate general data operation, and the DE9901, a total 'plug-and-play' Mobitex operation.

Further reading:

Industrial Ethernet time sensitive networking switch
RS South Africa Telecoms, Datacoms, Wireless, IoT
The ADIN3310 and ADIN6310 are 3-port and 6-port Gigabit Ethernet time sensitive networking (TSN) switches with integrated security primarily designed for industrial Ethernet applications.

Read more...

---

When it comes to long-term reliability of RF amplifier ICs, focus first on die junction temperature
Altron Arrow Editor's Choice Telecoms, Datacoms, Wireless, IoT
When considering the long-term reliability of integrated circuits, a common misconception is that high package or die thermal resistance is problematic. However, high or low thermal resistance, by itself, tells an incomplete story.

Read more...

---

Automotive-grade digital isolators
Telecoms, Datacoms, Wireless, IoT
The NSI83xx series of capacitive-based isolators from NOVOSENSE Microelectronics offer superior EOS resilience and minimal power noise susceptibility.

Read more...

---

Why bis means business for LTE Cat 1 IoT connections
NuVision Electronics Editor's Choice Telecoms, Datacoms, Wireless, IoT
Tomaž Petaros, product manager IoT EMEA at Quectel Wireless Solutions explains why the market for Cat 1bis IoT connections is getting busy.

Read more...

---

Wi-Fi in 2025: When is Wi-Fi 7 the answer?
iCorp Technologies Telecoms, Datacoms, Wireless, IoT
Wi-Fi 7 introduces multi-link operation and lower latency, a game-changing feature that allows devices to transmit and receive data across multiple frequency bands simultaneously to significantly reduce network congestion.

Read more...

---

Bluetooth Lite SoCs purpose built for IoT
NuVision Electronics Telecoms, Datacoms, Wireless, IoT
Whether it is enabling predictive maintenance on industrial equipment, tracking assets in dense environments, or running for years on a coin cell battery in ultra-low power sensors, developers need solutions that are lean, reliable, and ready to scale with emerging use cases.

Read more...

---

LTE Cat 1bis module
Otto Wireless Solutions Telecoms, Datacoms, Wireless, IoT
The A7673X LTE Cat 1bis module from SimCom is engineered to meet the growing demands of the IoT industry, offering exceptional performance and seamless integration.

Read more...

---

Track with precision
Electrocomp Telecoms, Datacoms, Wireless, IoT
KYOCERA AVX provides innovative antennas for cellular, LTE-M, NB-IoT, LoRa, GNSS, BLE, UWB, Wi-Fi, and future Satellite IoT.

Read more...

---

Wi-Fi 7 front-end module
RF Design Telecoms, Datacoms, Wireless, IoT
The Qorvo QPF4609 is an integrated front end module designed for 802.11be systems that has integrated matching, which minimises layout area.

Read more...

---

Multi-channel downconverter
Vepac Electronics Telecoms, Datacoms, Wireless, IoT
The Downconverter from Crane Aerospace is a converter that operates from 2 to 18 GHz and delivers a noise figure of 11 dB with an attenuation range of 25 dB.

Read more...

---