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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
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Technology News
Automotive MCU benchmark takes energy efficiency into account
May 21, 2013
Today, cars are crammed with microprocessors, and many of them are not completely switched off when the driver parks and ...
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Business News
EnSilica partners Cross Border Technologies to boost sales growth in key European markets
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Technology News
Industry's first ultra-wideband Doherty amplifiers support broadband operation
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Technology News
Graphics chip recognizes nearby pedestrians and bicycles
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Market News
EMS boom for medical industry says analyst
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Business News
Gemalto teams with Encore Networks for mission critical M2M communications as US shifts to wireless
May 21, 2013
European smartcard specialist Gemalto has teamed up with US machine-to-machine (M2M) router supplier Encore Networks to provide ...
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Market News
Solar industry capital spending hits seven-year low in 2013 but upturn is on the cards
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Market News
Apple's overseas tax evasion stirs debate over US tax code
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Market News
Could Intel enable USD200 Ultrabook?
Technical papers
Filter Wizard
Check out the Filter Wizard Series of articles by Filter Guru Kendall Castor-Perry which provide invaluable practical Analog Design guidelines.
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The development platform for i.MX 6Quad from element14 (built to the Freescale SABRE Lite design) is an evaluation platform featuring the powerful i.MX 6Q, a multimedia application processor with Quad ARM Cortex-A9 cores at 1.2 GHz from Freescale Semiconductor.
This month, Freescale and element14 are giving away five such platforms, worth £128.06 each, for EETimes Europe's readers to win. The platform helps evaluate the rich set of peripherals and includes a 10/100/Gb Ethernet port, SATA-II, HDMI v1.4, LVDS, parallel RGB interface, touch screen interface, analog headphone/microphone, micro TF and SD card interface, USB, serial port, JTAG, camera interface, and input keys for Android.
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In our previous reader offer, Pico Technology was giving away one of its recently launched PicoScope 3207B, a 2-channel USB 3.0 oscilloscope worth 1451 Euros. Lucky winner Mr L. Sanchez-Gonzalez from Spain should be receiving his PicoScope 3207B soon. Let's wish them some interesting findings with his projects.
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Automotive
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.
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