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wirelessZONE Products for the week of October 19, 2009
National Semiconductor Says…
SP16160CH1RB: Wireless Basestation IF Sampling Receiver Subsystem
Subsystem Reference Board and Tools Accelerate Development of GSM/EDGE, WCDMA, LTE and WiMAX Wireless Basestations
National Semiconductor Corp. announced the availability of an intermediate frequency (IF) sampling receiver reference design for multi-carrier, multi-standard wireless basestations addressing GSM/EDGE, WCDMA, LTE and WiMAX standards. The subsystem reference design kit gives radio designers the necessary technical material – reference design board, software, schematic, bill of materials (BOM) and Gerber files – to accelerate the design and development of high-performance radio receivers.
The SP16160CH1RB reference design board facilitates evaluation of the IF receive signal path performance under a variety of input conditions. When combined with a low-noise, high-linearity RF front-end and sufficient IF filtering, the reference design enables high sensitivity receivers that exceed the stringent multi-carrier GSM requirements in both normal and blocking conditions. Improved receiver sensitivity translates to enhanced basestation capacity and coverage, allowing service providers to reach more customers and deliver a higher quality of service.
EN-Genius Says…
The world of RF/IF design using high-speed ADCs is not getting any simpler. With fewer and fewer design engineers with enough high-end analog design experience, the tasks just get more complex and more difficult. National is offering this reference board as a morale booster for those facing this task.
Essentially the SP16160CH1RB (why not use the reference design number RD-179 and save everybody grief?) shows how to use National’s dual channel digitally-controlled VGA – the LMH6517 – with the dual 16-bit 160 Msample/s ADC – the ADC16DV160 – with the ancillary circuits needed. Those include the LMK04031B precision clock conditioner and a bunch of power products for the various rails required from a single 5 V input.
The result is an IF sub-sampling receiver with a 20 MHz bandwidth centered at 192 MHz with a low noise 153.6 Msample/s CMOS sampling clock and LVDS outputs.
IF chain receiver sensitivity is -105 dBm with a 200 kHz channel 9 dB CNR while SNR is 99 dBFS under normal conditions and SFDR is better than 90 dBFS under blocking conditions.
The completely assembled and tested board comes with the WaveVision 5.1 data capture board and WaveVision 5 software.
The board is in production with a price of $995 each. But if you’re in the market for even a moderate number of ADC16DV160s, reviewed here a couple of months ago, you can probably leave your checkbook at home.
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