LTC5596 Power Detector

General Description

The LTC®5596 is a high accuracy RMS power detector that provides a very wide RF input bandwidth, from 100MHz up to 40GHz. This makes the device suitable for a wide range of RF and microwave applications, such as pointto-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 29mV/dB logarithmic slope over a 35dB dynamic range with typically better than ±1dB accuracy. The detector is particularly suited for measurement of waveforms with crest factor (CF) as high as 12dB, 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: 100MHz to 40GHz

35dB Linear Dynamic Range (< ±1dB Error)

29mV/dB Logarithmic Slope

±1dB Flat Response from 200MHz to 30GHz

Accurate RMS Power Measurement of High Crest Factors (Up to 12dB) Modulated Waveforms

Low Power Shutdown Mode

Low Supply Current: 30mA at 3.3V (Typical)

Small 2mm × 2mm 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: 3500V HBM, 1500V CDM

Typical Applications

Point-to-Point Microwave Links

Instrumentation and Measurement Equipment

Military Radios n LTE, WiFi, WiMax Wireless Networks

RMS Power Measurement

Receive and Transmit Gain Control

RF PA Transmit Power Control