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A new high performance log detector from Linear Technology has impressive sensitivity, allowing more accurate measurement of lower levels of RF and IF signals. The LT5537 has an operating frequency range from near DC to 1 GHz. It features a measurement dynamic range of 90 dB, enabling wide operating range for receivers in such applications as Automatic Gain Control (AGC) loops. Additionally the device offers desirable accuracy over temperature, making it suitable for wireless basestations, access points, subscriber radios, and RF instrumentation subject to a wide range of environmental conditions. The LT5537 incorporates a cascading chain of limiting amplifiers to provide a constant, linear 20 mV/dB logarithmic detection function. The device can measure signals within an error of ± 1 dB over the worst-case temperature extremes. The LT5537 is offered in an 8-lead 3 mm × 2 mm surface mount DFN package. 

Linear Technology