Datasheet > LT5538IDD-TRPBF

LT5538IDD-TRPBF

更新时间： 2024-11-11 05:43:35

品牌	Logo	应用领域
凌特 - Linear		/
页数	文件大小	规格书
12页	233K
描述
40MHz to 3.8GHz RF Power Detector with 75dB Dynamic Range

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中文翻译

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LT5538IDD-TRPBF 数据手册

LT5538

40MHz to 3.8GHz

RF Power Detector with

75dB Dynamic Range

FEATURES

DESCRIPTION

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

convertedintoDCvoltageonalinearscale. Thewidelinear

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.

■

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

APPLICATIONS

■

Received Signal Strength Indication (RSSI)

, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.

All other trademarks are the property of their respective owners.

■

RF Power Measurement and Control

■

RF/IF Power Detection

Receiver RF/IF Gain Control

Envelope Detection

ASK Receiver

■

TYPICAL APPLICATION

Output Voltage and Linearity Error

vs Input Power

40MHz - 3.8GHz Logarithmic RF Detector

2.0

1.7

1.4

1.1

0.8

0.5

0.2

= 5V AT 880 MHz

LT5538

OUT

ENBL

OUT

INPUT

CAP

–

1nF

CAP

GND

5538 TA01

0.1μF

100pF

–1

–2

–3

= –40°C

= 25°C

= 85°C

–75

–55 –45 –35 –25 –15 –5

INPUT POWER (dBm)

–65

5538 TA02

5538f

12 3 4 5 6 7...12

中文翻译

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