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NXP introduces simultaneous multi-channel data reception in automotive transceivers; reducing power consumption
13 August 2013
NXP Semiconductors N.V. introduced the NCK2983, a low power multi-channel two-way UHF transceiver with an embedded microcontroller system that uniquely can receive up to three channels in parallel rather than sequentially. The device is suitable for use in both key fob and body control module-type applications, including Keyless Entry, Remote Start, Tire Pressure Monitoring Systems (TPMS) and Wireless Diagnostics (WD).
Existing multi-channel transceivers are only able to poll for signals sequentially, one channel after another, in order to check every possible frequency that an application may be transmitting on. By enabling reception across three channels simultaneously, the NCK2983 device shortens the period it needs to be awake when polling, significantly reducing overall power consumption while increasing system robustness.
The NCK2983 is able to receive multiple channels in parallel because it uses a pioneering Wideband Digital IF approach. Similar in concept to a Software Defined Radio, the high-performance, low-noise front end presents the down-mixed RF signal to a high-speed Sigma-Delta ADC, serving as input to up to three discrete receive channels in the DSP unit.
Each channel can be configured independently, mixing down the signal to baseband according to the specific channel frequency, and applying relevant channel filter, demodulation and clock recovery settings.
The NCK2983 features a Fractional–N based frequency synthesizer that enables the device to operate in any of the common ISM bands and supports carrier frequency hopping at each of the three baseband channels. The NCK2983 also includes an embedded microcontroller system with 32 kB EROM (FLASH) allowing complete applications to be implemented as single-chip solutions. The transceiver supports special power modes for battery-powered key and car operation such as sleep mode and low power polling mode.
With this feature set, the NCK2983 combines RF performance with sophisticated baseband signal processing, making the chip suited for two-way multi-channel applications in the automotive market, the company said.
The NCK2983 is the first chip of a new product family for sub-GHz RF communication systems. Our customers and OEMs acknowledge that we provide new ways of reducing power consumption while improving performance. By combining multi-channel and simultaneous RF reception with customer programmable smart polling in a single package, NXP has made another breakthrough in automotive electronics. Next we intend to significantly increase the system operating range by launching a dedicated long-range version of the chip.—Dr. Volker Graeger, vice president Car Access and Immobilizers, NXP Semiconductors
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