LTC®5596 100 MHz to 40 GHz Linear-in-dB RMS Power Detector

This high-accuracy RMS power detector, from Linear Technology, provides a very-wide RF input bandwidth

Image of Linear Technology's LTC5596 RMS Power DetectorThe 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.

Image of Linear Technology's LTC5596 RMS Power Detector Diagram
  Image of Linear Technology's LTC5596 RMS Power Detector Graph
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

Video:  LTC5596 35GHz RMS Detector Breaks Through Dynamic Range Barrier

LTC5596 RMS Power Detector

ImageManufacturer Part NumberDescriptionAvailable QuantityView Details
LTC5596IDC#TRMPBF datasheet linkIC RMS POWER DETECTOR 8DFNLTC5596IDC#TRMPBFIC RMS POWER DETECTOR 8DFN1088 - Immediate
LTC5596IDC#TRMPBF product page link

Demo Board

ImageManufacturer Part NumberDescriptionAvailable QuantityView Details
DC2158A datasheet linkDEMO BOARD FOR LTC5596DC2158ADEMO BOARD FOR LTC559618 - Immediate
DC2158A product page link
Published: 2016-12-12