DVGAs enable higher-performance basestation radio architectures
August 11, 2011 // Paul Buckley
National Semiconductor Corp., has introduced a pair of quad- and dual-channel, digital variable gain amplifiers (DVGA) that enable higher-performance wideband radio systems. The LMH6522 quad and LMH6521 dual DVGAs provide superior linearity performance over a wide frequency range, making them an ideal solution for the most challenging multi-channel wideband wireless systems.
Target applications include intermediate frequency (IF) sampling receivers, I/Q digital pre-distortion (DPD) signal paths and wide-bandwidth direct-conversion radios used in multi-carrier GSM, TD-SCDMA, W-CDMA and LTE wireless basestations.
Radio designers face the challenge of producing cost effective anti-alias filters (AAF) that meet the demanding requirements of today’s wider radio bandwidths. The flexibility to select from a range of filter impedance levels, including low impedance levels such as 50-Ohms, not only simplifies the AAF design, but also improves performance and manufacturability. National’s DVGAs are optimized for driving a wide range of load impedances. Their low-Z output drive delivers exceptional signal fidelity and provides the additional power gain needed when driving low impedance filters.
The LMH6522 and LMH6521 are well-suited for driving high-speed ADCs, including National’s ADC16DV160 dual 16-bit, 160 MSPS converter. In addition, the LMH6521 is ideal for driving National’s ultra-high-speed ADC12D500/800RF 12-bit, 500 MSPS/800 MSPS direct RF-sampling ADCs. By adding the LMX2541 frequency synthesizer and one of National’s family of LMK04800 or LMK04000 clock jitter cleaners, a designer can form a complete signal path.
Available now, the LMH6522 is priced at $9.85 and the LMH6521 is $6.15, both in 1,000-unit quantities.
For further information: www.national.com.
Wearable: 'Hardware Ponzi Scheme'
August 31, 2015
If "fitness bands are like hardware Ponzi schemes" where device suppliers must sell more and more new hardware while amusing ...
Keysight expands calibration, asset management services in Europe
Real-time 3D athletes tracking feeds teams with new stats
Intel Investment spotlights drones’ opportunity for chipmakers
MOSFET failure protection for a single output polyPhase converter
Apple joins Pentagon alliance to develop wearable tech
August 28, 2015
The Pentagon (Washington, DC) has announced a Silicon Valley-based manufacturing institute and partnership with a consortium ...
Single material layer process lowers LED manufacturing costs
Aquion Energy forges technology partnership with Eguana Technologies
The route to cleaner e-cars - coupling perovskite solar cells
- Software-Defined Radio Handbook
- Why Making the Move from a Variable Transformer to a VariPLUS is the Right Decision
- Automating Leakage and Functional Testing
- Automotive Circuit Protection using Littelfuse Automotive TVS Diodes
InterviewCEO interview: Ambiq sees broader options for low voltage
Mike Noonen, recently appointed interim CEO at microcontroller startup Ambiq Micro, discusses the focus and opportunities for this pioneering company designing circuits that can operate below the threshold ...
Filter WizardCheck out the Filter Wizard Series of articles by Filter Guru Kendall Castor-Perry which provide invaluable practical Analog Design guidelines.
Linear video channel
READER OFFERRead more
This month, Novelda is giving away two full XeThru Inspiration kits worth 1499 US Dollars each, for EETimes Europe's readers to experiment first hand with its XeThru technology.Based on the use of radio waves, rather than infrared, ultrasound or light, the company's X2M1000 Inspiration modules can detect presence just from the chest movement while breathing, and measure both the rate and... MORE INFO AND LAST MONTH' WINNERS...
December 15, 2011 | Texas instruments | 222901974
Unique Ser/Des technology supports encrypted video and audio content with full duplex bi-directional control channel over a single wire interface.