Press Release

2MHz to 1.6GHz, 45dB RF-Detecting Controllers Simplify Control-Loop Design of Power Amplifiers and Transimpedance Amplifiers

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Note to Editor: The MAX9930–MAX9933 low-cost, low-power logarithmic amplifiers are designed to control RF power amplifiers and transimpedance amplifiers and to detect RF power levels. The MAX9930–MAX9933 can operate up to 1.6GHz, but are especially designed for ASK/OOK applications in lower frequency bands (down to 2MHz) where peak-power detection is important. Internal offset correction and superior circuit design allow for the wide variety of input ranges while operating in the 2MHz to 1.6GHz frequency range. These devices are ideal for a variety of wireless and GPON fiber video applications such as transmitter power measurement and RSSI for terminal devices.

SUNNYVALE, CA—August 16, 2007—Maxim Integrated Products (NASDAQ: MXIM) introduces the MAX9930–MAX9933 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. The MAX9930–MAX9933 are designed to operate in the 2MHz 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 fiber 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: -58dBV to -13dBV (MAX9930/MAX9933), -48dBV to -3dBV (MAX9931), and -43dBV to +2dBV (MAX9932).

The MAX9930–MAX9933 consume 5.9mA with a 5V supply, and the typical shutdown current is 13µA. 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 an 8-pin µMAX® package that achieves excellent temperature stability over the extended operating range of -40°C to +85°C. Prices start at $1.29 (1000-up, FOB USA).

µMAX is a registered trademark of Maxim Integrated Products, Inc.