Datasheet Linear Technology LT5581 — Datenblatt

LT5581
6GHz RMS Power Detector
with 40dB Dynamic Range
FEATURES DESCRIPTION Frequency Range: 10MHz to 6GHz
nn Accurate Power Measurement of High Crest Factor
(Up to 12dB) Waveforms
nn 40dB Log Linear Dynamic Range
nn Exceptional Accuracy Over Temperature
nn Fast Response Time: 1μs Rise, 8μs Fall
nn Low Power: 1.4mA at 3.3V
nn Log-Linear DC Output vs Input RF Power in dBm
nn Small 3mm × 2mm 8-Pin DFN Package
nn Single-Ended RF Input The LT®5581 is a 10MHz to 6GHz, low power monolithic
precision RMS power detector. The RMS detector uses a
proprietary technique to accurately measure the RF power
from –34dBm to +6dBm (at 2.14GHz) of modulated signals
with a crest factor as high as 12dB. It outputs a DC voltage
in linear scale proportional to an RF input signal power
in dBm. The LT5581 is suitable for precision power measurement and control for a wide variety of RF standards,
including GSM/EDGE, CDMA, CDMA2000, W-CDMA,
TD-SCDMA, UMTS, LTE and WiMAX, etc. The final DC output is connected in series with an on-chip 300Ω resistor,
which enables further filtering of the output modulation
ripple with just a single off-chip capacitor. nn APPLICATIONS …