Product category:
Analogue and Mixed Signal ICs
News Release from: Maxim Integrated Products | Subject: MAX9930-MAX9933
Edited by the Electronicstalk Editorial
Team on 17 August 2007
Low-power log amps take control
Devices provide a choice of three different input-voltage ranges, eliminating the need for external attenuators and simplifying amplifier control-loop design.
The Maxim MAX9930-MAX9933 are low-cost low-power logarithmic amplifiers that control RF power amplifiers and transimpedance amplifiers (TIAs), and detect RF power levels These devices provide a choice of three different input-voltage ranges, thus eliminating the need for external attenuators and therefore simplifying amplifier control-loop design
This article was originally published on Electronicstalk on 27 Aug 2002 at 8.00am (UK)
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The MAX9930-MAX9933 are designed to operate in the 2 to 1.6GHz frequency range and have a typical dynamic range of 45dB with an accuracy of +/-1dB, making them useful in a variety of wireless and GPON fibre video applications such as transmitter power measurement and RSSI for terminal devices.
Logarithmic amplifiers provide a much wider, more accurate measurement range than controllers based on diode detectors.
Each of these amplifiers measure voltage in a distinct, typical signal range: -58 to -13dBV (MAX9930/MAX9933), -48 to -3dBV (MAX9931), and -43 to +2dBV (MAX9932).
Each device consumes 5.9mA with a 5V supply, and the typical shutdown current is 13uA.
Furthermore, these devices feature a glitch-free output by asserting a power-on delay when coming out of shutdown.
The MAX9930-MAX9933 are available in 8-pin Micromax packages that achieve excellent temperature stability over the extended operating range of -40 to +85C.
Prices start at US $1.29 (1000-up).
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