Features and Benefits
- Ultra Wide Matched Input Frequency Range: 100MHz to 70GHz
- 35dB Linear Dynamic Range (< ±1dB Error)
- 28.5mV/dB Logarithmic Slope
- ±2dB Flat Response from 100MHz to 60GHz
- Accurate RMS Power Measurement of High Crest Factors (Up to 12dB) Modulated Waveforms
- Low Power Shutdown Mode
- Low Supply Current: 33mA 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: 2500V HBM, 1500V CDM
The LTC5597 is a high accuracy RMS power detector that provides a very wide RF input bandwidth, from 100MHz up to 70GHz. 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 28.5mV/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 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.
- Point-to-Point Microwave Links
- Instrumentation and Measurement Equipment
- Military Radios
- 5G, LTE, WiFi, Wireless Networks
- RMS Power Measurement
- Receive and Transmit Gain Control
- RF PA Transmit Power Control
Product Lifecycle Recommended for New Designs
This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.
Evaluation Kits (2)
Demonstration circuit DC3129A-KIT is a Linduino® evaluation kit for RMS Power Detector LTC5597. It is set up for quick evaluation of RMS RF power measurement using the Arduino/Linduino compatible platform and software download available. When connected to PC with USB cable, accurate power level can be monitored using the graphic user interface.
The LTC5597 is a wide dynamic range linear-in-dB RMS RF Power Detector, operational from 100 MHz to 70 GHz. The Linduino (DC2026C) platform provides 10-bit ADC at 4.9 mV/LSB resolution with 5V default reference voltage. Input dynamic range with 1 dB accuracy is up to 35 dB depending on frequency. The detector output slope is normally 6 LSB/dB. The DC3129A-KIT is optimized for wide operational frequency signals up to 70 GHz using the 1.85mm edge mount connector. Input impedance is internally matched to 50Ω. It is suitable for RMS measurements of high crest factor waveforms up to 12 dB peak-to-average. No external coupling capacitor is necessary if DC voltage at RFIN pin is kept below 1.0V. On board 3.3V regulator provides power to the shield by jumper JP1. Contact applications support for more information.
NOTE: DC3128A is the part number for the RF board only. The RF board schematic & PCB design will show this part number. This item is not available separately. It is included as part of DC3129A-KIT.
DC3129A-KIT is the part number for the complete board stack, consisting of a pre-programmed Linduino board + RF board. The complete assembly is tested and ready for use. Refer to the DC3129A-KIT Demo Manual for further instructions.
For questions, please post to EngineerZone or contact your local Analog Devices Field Applications Engineer.
Demonstration circuit 2932A hosts a high accuracy RMS power detector featuring the LTC5597 IC. This ultrawide bandwidth device has a RMS response that measures RF and microwave signals from 100MHz to 70GHz. The input signal converts to a DC voltage that is logarithmically proportional to the input signal level. Moreover, the LTC5597 offers unprecedented sensitivity, capable of detecting signals of –37dBm typical. Additionally, it has outstanding input dynamic range up to 35dB, achieving 1dB accuracy, depending on frequency. The detector output voltage slope is normally 29mV/dB. The PCB layout employs the recommended microstrip transmission line structure, as well as the recommended endpoint transitions. Input impedance to LTC5597 is internally matched to 50Ω. It is suitable for RMS measurements of high crest factor waveforms up to 12dB peak/average ratio. No external coupling capacitor is necessary if DC voltage at RFIN pin is kept below 1V. Contact applications support for more information.
Tools & Simulations
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal.
Sample & Buy
The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.