LT5534 Datasheet | Linear Technology

LT5534 50MHz to 3GHz RF Power Detector with 60d B Dynamic Range Features s s s DESCRIPTIO s s s s s RF Frequency Range: 50MHz to 3GHz Linear Dynamic Range: 60d B Exceptional Accuracy over Temperature and Power Supply Fast Transient Response: 38ns Full-Scale Settling Time Single 2.7V to 5.25V Supply Low Supply Current: 7m A Shutdown Current: 0.1µA Tiny 6-Lead SC70 Package U APPLICATIO S s s s s The LT®5534 is a 50MHz to 3GHz monolithic RF power detector capable of measuring RF signals over a 60d B dynamic range. The RF signal in a decibel scale is precisely converted into DC voltage on a linear scale. The 60d B input dynamic range is achieved using cascaded RF detectors and RF limiters. Their outputs are summed to generate an accurate log-linear DC voltage proportional to the input RF signal in d B. The output is buffered with a low output impedance driver. The LT5534 delivers superior temperature stability (typical output variation within ±1d B over the full temperature range). The output responds in less than 40ns to a large RF input signal. , LTC and LT are registered trademarks of Linear Technology Corporation. RF Receive Power Management RF Power Control CATV Power Detection Optical Receiver Gain Control TYPICAL APPLICATIO 50MHz to 3GHz RF Power Detector 3V 0.1µF 100p F 2.0 2.4 LT5534 DET 1n F RF INPUT 47Ω ENABLE RF DET DET 1.6 1 0 - 1 TA = 25°C TA = 85°C TA = - 40C - 50 - 40 - 30 - 20 - 10 RF INPUT POWER (d Bm) 0 - 2 - 3 VOUT VOUT (V) VOUT EN GND 5534 TA01 Output Voltage vs RF Input Power VCC = 3V AT 900MHz 3 2 LINEARITY ERROR (d B) 1.2 0.8 0.4...