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