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LT5538IDD-PBF Datasheet(PDF) 1 Page - Linear Technology |
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LT5538IDD-PBF Datasheet(HTML) 1 Page - Linear Technology |
1 / 12 page LT5538 1 5538f TYPICAL APPLICATION FEATURES APPLICATIONS DESCRIPTION 40MHz to 3.8GHz RF Power Detector with 75dB Dynamic Range The LT®5538 is a 40MHz to 3800MHz monolithic logarith- mic RF power detector, capable of measuring RF signals over a wide dynamic range, from –75dBm to 10dBm. The RF signal in an equivalent decibel-scaled value is precisely converted into DC voltage on a linear scale. The wide linear dynamic range is achieved by measuring the RF signal us- ing cascaded RF limiters and RF detectors. Their outputs are summed to generate an accurate linear DC voltage proportional to the input RF signal in dBm. The LT5538 delivers superior temperature stable output (within ±1dB over full temperature range) from 40MHz to 3.8GHz. The output is buffered with a low impedance driver. 40MHz - 3.8GHz Logarithmic RF Detector ■ Frequency Range: 40MHz to 3.8GHz ■ 75dB Log Linear Dynamic Range ■ Exceptional Accuracy over Temperature ■ Linear DC Output vs. Input Power in dBm ■ –72dBm Detection Sensitivity ■ Single-ended RF Input ■ Low Supply Current: 29mA ■ Supply Voltage: 3V to 5.25V ■ 8-lead DFN 3mm × 3mm package ■ Received Signal Strength Indication (RSSI) ■ RF Power Measurement and Control ■ RF/IF Power Detection ■ Receiver RF/IF Gain Control ■ Envelope Detection ■ ASK Receiver Output Voltage and Linearity Error vs Input Power IN– ENBL EN VOUT 5V 100pF 0.1μF IN+ GND CAP– OUT CAP+ VCC LT5538 5538 TA01 1nF 1nF 56 RF INPUT 9 , LT, LTC and LTM are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. 5538 TA02 INPUT POWER (dBm) –75 –65 –55 –45 –35 –25 –15 –5 5 0.2 0.5 0.8 1.1 1.4 2.0 1.7 –3 –2 –1 0 1 3 2 TA = –40°C TA = 25°C TA = 85°C VCC = 5V AT 880 MHz |
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