Temperature-compensating attenuators deliver high linearity
November 29, 2011 // Jean-Pierre Joosting
The RFSA4013 and RFSA4023 from RFMD are fully monolithic analog Temperature-Compensating Attenuators (TCAs) featuring exceptional linearity over their entire gain control range. These TCAs are designed to offset the gain reduction of an RF component over temperature without the need for closed loop feedback.
Three customer selectable temperature coefficients make these TCAs a flexible solution for RF lineups. Each attenuator incorporates revolutionary circuit architecture that solves a longstanding industry problem with regards to attenuator architecture: high IP3, low DC current, and broad bandwidth.
Traditional approaches for linear temperature-compensating devices require expensive co-fired ceramics with temperature-sensitive materials or current-hungry PIN diodes with elaborate area consuming control circuits. The RFSA4013 and RFSA4023 only require a single supply voltage and two logic bits to set the control attenuation slope versus temperature.
Each TCA draws a low 1 mA current and is packaged in a small 3-mm x 3-mm QFN. These attenuators are internally matched to 50 Ω over their rated control range and frequency.
The TCAs cover a broadband 50 MHz to 4000 MHz frequency range with three selectable attenuation slopes versus temperature, IIP3 of +55 dBm, IIP2 of +85 dBm, and P1dB of over +30 dBm. Typical applications include cellular and 3G infrastructure, WiBro, WiMax, LTE, microwave radio and high-linearity level control.
For further information: www.rfmd.com. All news
Steep growth for thermoelectric energy harvesting, says Infinergia Consulting
July 22, 2014
In a new report titled “Sub-watt thermoelectric energy harvesting: industry and market analysis”, market research firm Infinergia ...
AMS, Dialog merger talks fail
MIT wrist-robot adds extra fingers
Monolithic Power Systems signs with Avnet Memec
Thoughts on energy harvesting for wearable equipment
Will laser ignition replace the venerable spark plug?
July 21, 2014
Lowering fuel consumption and reduce the emission of pollutants - these aspects today are at the top of the design goals ...
Merger creates powerhouse in micro imaging software
'Hot carrier' study opens solar cell efficiency advances
Google Glass' killer app: surveillance
- Testing GPS with a Simulator
- DSM presents: Select the best plastic for DDR4
- Dual 13A μModule Regulator with Digital Interface for Remote Monitoring & Control of Power
- Exploring the Business Model Evolution of High-Tech Equipment Manufacturers
InterviewCEO interview: China, not Apple, is way to go, says mCube CEO
Ben Lee, CEO of MEMS startup mCube, explains why he wants to spend $37 million on being a supplier of sensors to Chinese ODMs and avoiding a design win with Apple or Samsung.
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, Altium Ltd is offering EETimes Europe's readers the chance to win one TASKING VX-Toolset for ARM Cortex-M Premium Edition, normally licensed for 2.395 Euros, for ultra-rapid prototyping and code development around ARM Cortex-M based microcontrollers.
The VX-toolset for ARM is the first TASKING compiler suite to receive the Software Platform technology, which is seamlessly...Read more
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.