Part Number: LTC5507ES6

Manufacturer: Analog Devices

Description: RF Detector 100kHz to 1GHz RF Pwr Detector

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Technical Specifications of LTC5507ES6#TRMPBF

Datasheet  LTC5507ES6#TRMPBF datasheet
Category RF/IF and RFID
Family RF Detectors
Manufacturer Linear Technology
Packaging Tape & Reel (TR)
Part Status Active
Frequency 100kHz ~ 1GHz
RF Type General Purpose
Input Range -34dBm ~ 14dBm
Voltage – Supply 2.7 V ~ 6 V
Current – Supply 550μA
Package / Case SOT-23-6 Thin, TSOT-23-6

LTC5507ES6 Description

The LTC® 5507 is a radio frequency power detector that can be utilized in settings ranging from 100kHz to 1000MHz. A capacitor outside the system determines the frequency range of the input signal. A small 6-pin Thin SOT package contains a temperature-compensated Schottky diode peak detector and a buffer amplifier. Peak detection of the RF input voltage is accomplished with the help of an on-chip Schottky diode and an external capacitor. The buffer stores the observed voltage, which is then sent to the VOUT pin. A mode that saves power by shutting down the device reduces the supply current to less than 2 A.

LTC5507ES6 Features

  • Schottky diode RF detector with internal temperature compensation.
  • -34 dBm to 14 dBm is a wide input power range.
  • 100kHz to 1000MHz is an extremely broad input frequency range.
  • Flushed Output.
  • Wide 2.7 to 6V VCC range.
  • 550 A is the low operating current.
  • 2 A is the low shutdown current.
  • Slim Profile (1mm) package with a thin sot.

Pin Functions

● (Pin 1) SHDN pin

Turn off the input. The component will enter shutdown mode if the SHDN pin receives either a logic low or a no-connect signal. A logic high is required to turn on the part. To guarantee that the part is in the shutdown state whenever the enable driver is in a tri-state condition, SHDN is equipped with an internal draw-down resistor with a value of 150k.

● (Pin 2) GND

System Ground.

● (Pin 3) VOUT

Buffered and Level Shifted Detector Output Voltage.

● (Pin 4) VCC

Supply voltage between 2.7 and 6 volts. Ceramic capacitors of 0.1F and 100pF should be used to bypass VCC.

● (Pin 5) PCAP

The capacitance value changes with RF frequency. PCAP and VCC must be connected with a capacitor.

RFIN (Pin 6) is the RF input voltage. As a cross-reference to VCC. When connecting to the RF signal generator, a coupling capacitor is required. This connector has a Schottky diode detector and a 250 termination inside.

Applications information

● Operation

The LTC5507 incorporates several features into a single package to allow RF power detection at frequencies up to 1000MHz. For this purpose, we use a level shift amplifier and a peak detector made from RF Schottky diodes to transform the RF signal into a DC one. While a delay circuit prevents voltage transients at VOUT upon resumption of operation, a gain compression circuit broadens the detector’s dynamic range. A detector’s dynamic range can be increased by means of this function’s internal gain compression circuit.

● Buffer Amplifier

The buffer amplifier features a gain of two and has the ability to drive a load of 2 milliamperes. In most cases, the output voltage range of the buffer amplifier is somewhere between 0.25V and VCC minus 0.1V.

● RF Detector

An onboard RF Schottky diode peak detector and level shift amplifier take the incoming RF signal and convert it into a low-frequency signal. Mostly, the RF pin can handle frequencies up to one GHz (MHz). The detector’s high functionality is preserved over a wide range of input powers. The Schottky detector is biased with a current of about 70 A. Outermost is the hold capacitor, which is easily accessible.

● Gain Compression

When the RF peak-detected input voltage rises above 60mV, the gain compression circuit adjusts the feedback ratio accordingly. Below 60 millivolts, the DC voltage gain from the peak detector to the buffer output is a factor of 4. When the DC voltage is higher than 140 mV, the gain drops to 0.75. The higher gain from the compression makes the range of the low-power detector more expansive.

● Applications

It is possible to utilize the LTC5507 as a self-standing signal strength measurement receiver for a wide range of input signals, with the ability to measure signal strengths ranging from –34dBm to 14dBm and frequencies reaching up to 1000MHz. AM and ASK modulated signals with data rates of up to 1.5MHz can be demodulated with the help of the LTC5507, which can also be used as a modulator. The RSSI output can be divided into two branches, depending on the specific application’s requirements. One branch provides AC-coupled data (or audio) output, while the other provides DC-coupled RSSI output for signal strength measurements and automatic gain control (AGC).

What is an RF Power Detector?

Radiofrequency (RF) detectors, which are utilized to monitor and manage radio frequency (RF) energy, have a wide range of applications. They play an essential part in wireless systems for commercial transmitters, which the Federal Communications Commission requires to ensure that the output power level does not exceed specified levels.

RF detectors are able to provide a DC voltage that is directly proportionate to the signal strength because they constantly monitor the power output of an RF system. You may check to determine if your system is operating at or above those levels by looking at the chart that shows the maximum power levels permitted by the FCC. RF detectors can be built into automated control systems, and if it turns out that a transmitter’s power output is dangerously high, the system can immediately turn the transmitter’s output power down or downgrade it.

A wide variety of radio frequency (RF) detectors are available on the market today; consequently, it is essential to purchasing one that caters to your specific requirements. If selecting an RF detector proves difficult for you, our team members are available to assist. Please contact us as soon as possible for additional information about our RF detector choices.

RF Power detectors serve an essential purpose in wireless network infrastructure. They provide the system with information regarding the amount of power being sent and contribute to the process of power output regulation. Without the power detection components, wireless local area networks (Wi-Fi) would be completely inoperable.

The most popular types of detectors are logarithmic detectors and root-mean-square detectors. The logarithmic detector is responsible for converting the RF power into a DC voltage that has a proportional relationship to the logarithm of the power. The root-mean-square detector will produce a direct current output with a magnitude proportional to the RMS value of the signal. It is possible to estimate the output power by using the DC voltage and the type of detector.


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