DC2158A Analog Devices

DEMO MANUAL DC2158A LTC5596 100MHz to 40GHz RMS Power Detector Description Absolute M A Mu M i rA Demonstration circuit 2158A hosts a high accuracy RMS Power Detector featuring the LTC 5596 IC. This device is (Note 1) a wide dynamic range RMS RF Power Detector operational Supply Voltage(V ):................................................3.8V CC from 100MHz to 40GHz. The input dynamic range with DC Voltage at RF : ....................................0.3V to 1.0V IN 1dB accuracy is up to 35dB depending on frequency. The DC Voltage at FLTR: .................................. 0.3V to 0.4V detector output voltage slope is normally 29mV/dB. The DC Voltage at EN: ...................................... 0.3V to 3.8V DC2158A Demo Circuit is optimized for wide operational RF Input Power-Average: ...................................15dBm IN frequency range up to 40GHz with 2.9mm SMK edge T .................................................................... 150C JMAX mount connector. Input impedance to LTC5596 is internally Case Operating Temperature Range ....... 40C to 105C matched to 50. It is suitable for RMS measurements Storage Temperature Range .................. 65C to 150C of high crest factor waveforms up to 12dB peak/average Note 1: Voltage on all pins must not exceed V +0.3V or CC ratio. No external coupling capacitor is necessary if DC be less than 0.3V. voltage at RF pin is kept below 1.0V. Contact applications IN CAUTION: This part is sensitive to electrostatic discharge support for more information. (ESD). Observe proper ESD precautions when handling Design files for this circuit board are available at the LTC5596. DEMO MANUAL DC2158A n otes on t est eQ Ment An D s Use a high performance signal generator with accurate Optional input attenuation can be used to improve return output power levels up to 40GHz, such as Rohde & loss, but also shifts the log intercept point accordingly. Schwarz SMF100A. Use high quality power supply with low noise, able to Demo Board DC2158A includes the SMK 2.9mm con- support 3.3V with 40mA of current. nector for best performance up to 40GHz. Connecting cable for RF signal should be rated up to 40GHz for the best performance. Quick s t Art p D 1. Remove the DC2158A from its protective packaging in 4. Connect the RF input to the signal generator at the an ESD-safe working area (see Figure 1). 2.92mm connector. 2. With power supply turned off, connect V and EN 5. Set the frequency and power level (less than +10dBm) CC turret to the supply positive output. And GND to the of the signal generator. negative supply output. Keep the leads to be as short 6. Measure the output voltage with the DMM. as possible to avoid voltage overshoot. 7. Sweep the power level to generate the transfer curve 3. Slowly ramp up the V together with EN supply to CC V vs Input Power. OUT 3.3V. Recommended ramp time is 1ms minimum. Do not float EN. dc2158afa 2 ure roce etup uip