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Analog Devices introduces the AD8318, a highly integrated wide dynamic range SiGe logarithmic amplifier. The device provides a temperature compensated output voltage for input frequencies from 1 MHz up to 8 GHz. This device has been specified for use at the cellular 900 MHz, 1900 MHz, 2.2 GHz frequencies, and at 3.6 GHz, 5.8 GHz, 8 GHz frequencies. The product can be used in measurement mode for a DC equivalent output voltage, or in controller mode where a set point control signal is applied to the VSET input, and the VOUT signal is used for gain or attenuator adjustment in an output power control application. The detector provides good temperature stability across the complete input frequency range. A single external resistor, set by the user, optimizes the temperature compensation to the desired input frequency. In addition to the internal temperature compensation, the AD8318 provides an output voltage that is proportional to absolute temperature calibrated 2 mV/° C.

Analog Devices, Inc.

Analog Devices Inc
http://www.analog.com