MAX9933EUA+

The MAX9933EUA+ is a 2MHz to 1.6GHz 45dB complete RF detector in 8 pin µMAX package. This low cost, low power logarithmic amplifier designed to control RF power amplifier (PA), transimpedance amplifier (TIA) and to detect RF power levels. A typical dynamic range of 45dB makes the logarithmic amplifier useful in a variety of wireless and GPON fibre video applications such as transmitter power measurement and RSSI for terminal devices. Logarithmic amplifier provides much wider measurement range and superior accuracy to controllers based on diode detectors. The choice of three different input voltage ranges eliminates the need for external attenuators, thus simplifying PA control-loop design. The logarithmic amplifier is a voltage measuring device with a typical signal range of -58dBV to -13dBV. It is used in RSSI for fibre modules, low frequency RF OOK and ASK applications, transmitter power measurement and control, TSI for wireless terminal devices.

• Supply voltage range is 2.7V to 5.25V
• Operating temperature range from -40°C to 85°C
• Maximum supply current is 12mA, shutdown supply current of 13µA
• Small-signal bandwidth is 4.5MHz at CCLPF = 150pF
• Slew rate is 5V/µs at VOUT = 0.36V to 1.45V, CCLPF = 150pF
• Temperature stable linear in dB response
• Fast response of 70ns 10dB step, frequency range from 2MHz to 1.6GHz
• Output sourcing capability of 10mA
• Low power of 17mW at 3V (typ)
• Input power range from -58dBV to -13dBV, equivalent power range -45dBm to 0dBm (50 ohm termination)

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RF Communications, Portable Devices

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