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
Harman continues shopping spree with two software takeovers
January 26, 2015
Infotainment giant Harman International has signed takeover agreements with Red Bend Software and Symphony Teleca. The investment ...
Pinpointing perovskite's ability to produce cheaper solar energy
Nanostructures key to organic solar cell efficiencies?
Essess completes Street View with IR heat maps
Technology available, application wanted
Open source to flood IT in 2015
January 23, 2015
Dr. Larry Ponemon, Chairman and Founder of the Ponemon Institute, predicts that the next two years will see the majority ...
Asia leads automotive innovation
Samsung, Apple dominated chip buying in 2014
French startup expands 3D to the room
- Sensing Elements for Current Measurements
- Investigating Die attach Failure in IGBTs using Power Cycling Tests
- Power Semiconductor Failure Diagnosis using Thermal Characterization and Power Cycling
- Top 5 Trends in Product Development and Test Engineering
InterviewCEO interview: Bosch's IoT startup is all about the system
Thorsten Mueller, CEO of Bosch Connected Devices and Solutions GmbH (Reutlingen, Germany), has been guiding the latest startup subsidiary of Robert Bosch GmbH since 2013 when he started the initiative ...
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
To ensure you have a good start in 2015, Freescale is giving away five of its QorIQ TWR-LS1021A Tower system modules, worth USD269 each, for EETimes Europe's readers to win.
The module is the most feature-rich and high-performance Tower system offered by Freescale, enabling compatibility and interoperability with the growing list of Tower expansion modules, offering an easily accessible...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.