LT5504EMS8#TRPBF

更新时间： 2024-01-19 16:00:20

品牌	Logo	应用领域
凌特 - Linear		电信集成电路电信电路光电二极管接收机
页数	文件大小	规格书
8页	180K
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LT5504EMS8#TRPBF 数据手册

LT5504

800MHz to 2.7GHz

RF Measuring Receiver

DESCRIPTIO

FEATURES

The LT^®5504 is an 800MHz to 2700MHz monolithic inte-

grated measuring receiver, capable of detecting a wide

dynamic range RF signal from –75dBm to +5dBm. The

logarithm of the RF signal is precisely converted into a

linear DC voltage. The LT5504 consists of RF/IF limiters,

an LO buffer amplifier, a limiting mixer, a 3rd-order

450MHz integrated low pass filter, RF/IF detectors and an

output interface. The ultrawide dynamic range is achieved

by simultaneously measuring the RF signal and a down-

converted IF signal obtained using the on-chip mixer and

an external local oscillator. The RF- and IF-detected sig-

nalsaresummedtogenerateanaccuratelinearDCvoltage

proportional to the input RF voltage (or power) in dB. The

output is buffered with a low output impedance driver.

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

■

RF Frequency Range: 800MHz to 2.7GHz

■

Ultra Wide Dynamic Range: 75dB at 900MHz

■

Wide Power Supply Range: 2.7V to 5.25V

■

Low Supply Current: 14.7mA at 3V

■

8-Lead MS0P Package

APPLICATIO S

■

RSSI Measurements

■

Receive AGC

■

Transmit Power Control

■

ASK and Envelope Demodulation

■

GSM/TDMA/CDMA/WCDMA

TYPICAL APPLICATIO

1nF

100pF

Output Voltage and Slope

Variation vs RF Input Power

LT5504

2.4

2.0

1.6

1.2

0.8

0.4

= 900MHz

= 240MHz

AVERAGE SLOPE:23mV/dB

OUTPUT

OUT

200Ω

10pF

DETECTOR

INPUT

• • •

DETECTOR

–2

–4

–6

82Ω

–

INPUT

ENABLE

–80 –70 –60 –50 –40 –30 –20 –10

PIN (dBm)

5504 TA01a

GND

5504 TA01b

5504f

12 3 4 5 6 7 8

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