Maxim's new MAX9930/1/2/3 are low-power logarithmic amplifiers designed to 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 simplifying amplifier control-loop design. They are designed to operate in the 2 MHz to 1,6 GHz frequency range and have a typical dynamic range of 45 dB with an accuracy of ±1 dB, making them useful in a variety of wireless and GPON fibre video applications such as transmitter power measurement and RSSI for terminal devices. Each of these amplifiers measures voltage in a distinct, typical signal range: -58 dBV to -13 dBV (MAX9930/MAX9933), -48 dBV to -3 dBV (MAX9931) and -43 dBV to +2 dBV (MAX9932). The devices consume 5,9 mA with a 5 V supply, with a typical shutdown current of 13 μA. They also feature a glitch-free output by asserting a power-on delay when coming out of shutdown.
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