Product category:
Sensors and Data Acquisition
News Release from: Smiths Interconnect - EMC Technology | Subject: Smartload
Edited by the Electronicstalk Editorial
Team on 31 January 2003
RF power sensor provides linear output
With its linear response, the Smartload sensor is ideal for determining RF power levels, regardless of waveform, simply by measuring true RMS power.
Featuring a linear response, the Smartload sensor is ideal for determining RF power levels regardless of waveform simply by measuring true RMS power The device is a passive temperature-compensated thick-film integrated circuit, and its small size of only 97mm2 (on alumina substrate) makes it suitable for use in surface mounting processes
This article was originally published on Electronicstalk on 3 Jun 2002 at 8.00am (UK)
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The passive nature of SmartLoad allows for a highly linear response over a wide dynamic range.
The circuit operates on a single 5V DC power supply and only draws 10mA nominally.
At the output terminals it delivers a DC signal directly proportional to the RF power level applied at the RF input termination.
The output is read as a differential signal between the temperature sensor termination and the power sensor termination, through an instrument amplifier.
Furthermore, SmartLoad is immune to damage from common levels of static electric discharge and radiation.
It also contributes no intermodulation products and its output is compensated for ambient temperature changes using the same technology as the popular Thermopad (an absorptive temperature-compensating microwave attenuator).
SmartLoad is designed to operate in temperatures ranging from -55 to +125C.
(This was Electronicstalk's Top Story on 30 January 2003).
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