EVAL-CN0178-SDPZ, Software-Calibrated, 50 MHz to 9 GHz, RF Power Measurement System Evaluation Board based on ADL5902

Description

• EVAL-CN0178-SDPZ, Software-Calibrated, 50 MHz to 9 GHz, RF power measurement system evaluation board. CN0178 Circuit uses the ADL5902 TruPwr detector to measure the rms signal strength of RF signals with varying crest factors (peak-to-average ratio) over a dynamic range of approximately 65 dB and operates at frequencies from 50 MHz up to 9 GHz. The measurement result is provided as serial data at the output of a 12-bit ADC (AD7466). A simple 4-point system calibration at ambient temperature is performed in the digital domain. The interface between the RF detector and the ADC is straight forward, consisting of two signal scaling resistors and no active components. In addition, the ADL5902 internal 2.3 V reference voltage provides the supply and reference voltage for the micropower ADC. The AD7466 has no pipeline delay and is operated as a read-only SAR ADC