Linear Technology LTC5996 at Digi-Key

Product Announcement from Digi-Key Electronics


The LTC5596, from Linear Technology, is a high-accuracy RMS power detector that provides a very-wide RF input bandwidth from 100 MHz up to 40 GHz. This makes the device suitable for a wide range of RF and microwave applications, such as point-to-point microwave links, instrumentation, and power-control applications.

The DC output voltage of the detector is an accurate representation of the average signal power applied to the RF input. The response is linear-in-dB with a 29 mV/dB logarithmic slope over a 35 dB dynamic range with typically better than ±1 dB accuracy. The detector is particularly suited for measurement of waveforms with crest factor (CF) as high as 12 dB and waveforms that exhibit a significant variation of the crest factor during the measurement.

To achieve higher accuracy and lower output ripple, the averaging bandwidth can be externally adjusted by a capacitor connected between the FLTR and OUT pins. The enable interface switches the device between active measurement mode and a low-power shutdown mode

Features    
  • Ultra-wide matched input frequency range: 100 MHz to 40 GHz
  • 35 dB linear dynamic range (less than ±1 dB error)
  • 29 mV/dB logarithmic slope
  • ±1 dB flat response from 200 MHz to 30 GHz
  • Accurate RMS power measurement of high crest factors (up to 12 dB) modulated waveforms
 
  • Low-power shutdown mode
  • Low supply current: 30 mA at 3.3 V (typ.)
  • Small, 2 mm × 2 mm, plastic DFN8 package
  • I-grade: –40°C to 105°C rated
  • H-grade: –40°C to 125°C rated, with guaranteed log-slope and log-intercept
  • ESD rating: 3500 V HBM and 1500 V CDM
Applications    
  • Point-to-point microwave links
  • Instrumentation and measurement equipment
  • Military radios
  • LTE, Wi-Fi, and WiMAX wireless networks
 
  • RMS power measurement
  • Receive and transmit gain control
  • RF PA transmit power control