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
European big data market grows steeply despite uncertain benefits
September 23, 2014
A new Big Data technology and services study from International Data Corporation (IDC) forecasts that the Western European ...
Liquid batteries could make renewables more competitive
Privacy gains traction with secure messaging apps
Startup's piezoelectric MEMS mics may take over
Ground is a cruel joke
Polymer solar cell boosts power generation by 15 percent
September 22, 2014
Scientists in the University of Chicago’s chemistry department, the Institute for Molecular Engineering and Argonne ...
What Apple stuffed inside iPhone 6 plus
Nuclear spins shown to control current in LED
ESCATEC expands LED and micro manufacturing facilities
- Putting FPGAs to Work in Software Radio Systems Handbook
- Flexible and Low Power Driving of Solenoid Coils
- How to Protect & Monetize Android Apps
- Power Modules: The New Super Power
InterviewCEO interview: AMS' Laney on driving a sensor-driven business
Kirk Laney, CEO of Austrian mixed-signal chip and sensor company AMS, wants to leverage the opportunity that technology affords to create new markets for sensors and sensor interfaces.
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, Trinamic Motion Control is offering you to win one of four TMCM-1043 development kits for its highly integrated, NEMA 17-compatible TMCM-1043 stepDancer stepper motor module.
Offering designers an easy-to-use PC-based GUI that allows one-click modification of motor drive current, micro-stepping and other key parameters, the intuitive kits are custom designed and developed for...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.