PRESS RELEASE - National Semiconductor - Introduces Wireless Basestation IF Sampling Receiver Subsystem

rwang — Tue, 08 Dec 2009 07:29:08 GMT

Current Revision posted to Documents by rwang on 12/8/2009 7:29:08 AM
Subsystem Reference Board and Tools Accelerate Development of GSM/EDGE, WCDMA, LTE and WiMAX Wireless Basestations

October 19, 2009 – National Semiconductor Corp. (NYSE:NSM) today 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.

The SP16160CH1RB delivers an IF chain receiver sensitivity of -105 dBm, with a 9 dB carrier-to-noise ratio in a 200 kHz channel, at 192 MHz input IF. With the digitally-controlled variable gain amplifier (DVGA) set at a maximum gain of 22 dB, the sensitivity is limited primarily by the noise contribution of the DVGA. In the presence of a strong blocker, with the DVGA gain set at 12 dB and blocker level kept at 1.6 dBm input to the ADC, the SP16160CH1RB board delivers sensitivity of -86 dBm. In this blocking condition, the receiver sensitivity is determined by the ADC’s high spurious-free dynamic range (SFDR).

The SP16160CH1RB operates from a single 5V supply and includes the dual-channel ADC16DV160 16-bit, 160 mega-samples per second (MSPS) pipeline ADC, dual-channel LMH6517 DVGA, and LMK04031B clock jitter cleaner. The overall performance of the reference design is enabled by the high dynamic performance of the ADC, the low-noise and high-linearity of the DVGA and ultra-low rms jitter of the clock jitter cleaner. The ADC16DV160 delivers a signal-to-noise ratio (SNR) of 76.3 dBFS and SFDR of 91.2 dBFS at 192 MHz input IF, while the LMH6517 provides a noise figure of 6 dB and OIP3 of 45 dBm, and the LMK04031BISQE/NOPBLMK04031BISQE/NOPB clock jitter cleaner offers near 150 fsec of rms clock jitter.

To simplify evaluation of the SP16160CH1RB, National offers the WaveVision 5.1 data capture board and WaveVision 5 software, which enables data capture and analysis, as well as complete programmable configuration of the ADC16DV160 and LMH6517 via a common serial peripheral interface (SPI) bus. Included with the SP16160CH1RB board, is a PIC loader board for configuring the LMK04031BISQE/NOPBLMK04031BISQE/NOPB.

Pricing and Availability

Available now, the SP16160CH1RB subsystem reference design kit is priced at $995 each. For more information or to order the design kit, visit www.national.com/rd/RDhtml/RD-179.html. For more information on National’s communications infrastructure products, visit www.national.com/comms.

Note to editors: To view a high-resolution downloadable photo of this product, visit National's photo gallery.

About National Semiconductor

National Semiconductor is a leader in analog power management technology. Its products include easy-to-use integrated circuits, PowerWise products that enable more energy-efficient systems, and SolarMagic products which improve the energy output of solar arrays. The company celebrates its 50th anniversary this year. Headquartered in Santa Clara, Calif., National reported sales of $1.46 billion for fiscal 2009. Additional information is available at www.national.com

Tags: pt:if_receiver_reference_design, tc:wireless, semiconductor, sp:national, at:press_release