LTC5536 데이터 시트보기 (PDF) - Linear Technology

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LTC5536

600MHz to 7GHz Precision RF Detector with Fast Comparator Output

Linear Technology 

FEATURES

■ Temperature Compensated Internal Schottky

Diode RF Detector

■ Wide Input Frequency Range: 600MHz to 7GHz*

■ Wide Input Power Range: –26dBm to 12dBm

■ Fast Comparator Output with Latch Enable

■ 25ns Response Time with 0dBm RF Input Level

■ Rail-to-Rail Output Swing

■ Comparator Output Current: ±20mA

■ Wide VCC Range of 2.7V to 5.5V

■ Low Operating Current: 2mA

■ Available in a Low Profile (1mm) SOT-23 Package

U

APPLICATIO S

■ RF Signal Presence Detectors for:

802.11a, 802.11b, 802.11g, 802.15

Optical Data Links

Wireless Data Modems

Wireless and Cable Infrastructure

■ RF Power Alarm

■ Envelope Detector

■ RF ID Tag Reader

TYPICAL APPLICATIO

600MHz to 7GHz RF Power Detector

RF

INPUT

33pF

1

LTC5536

RFIN

VCC

6

2

GND

5

VOUT

100pF

VCC

0.1µF

VM 3

REFERENCE

VM

LEN 4 DISABLE ENABLE

5536 TA01

LTC5536

600MHz to 7GHz

Precision RF Detector with

Fast Comparator Output

DESCRIPTIO

The LTC®5536 is an RF power detector for RF applications

operating in the 600MHz to 7GHz range. A temperature

compensated Schottky diode peak detector and fast com-

parator are combined in a small ThinSOTTM package. The

supply voltage range is optimized for operation from a

single cell lithium-ion or three cell NiMH battery.

The RF input voltage is peak detected using an on-chip

Schottky diode. The detected voltage is compared against

a reference voltage at VM.

The response time from the RF input to VOUT can be as little

as 20ns. The comparator output is latched when LEN is

high or is transparent when LEN is low.

The LTC5536 operates with RF input power levels from

–26dBm to 12dBm.

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

ThinSOT is a trademark of Linear Technology Corporation.

*Operation at higher frequencies is possible with reduced performance.

VM Comparator Switching Voltage

vs RF Input Power, 600MHz – 7GHz

3200

2800

2400

2000

1600

600MHz

1000MHz

2000MHz

3000MHz

4000MHz

5000MHz

6000MHz

7000MHz

VCC = 3.6V

VLEN = 0V

TA = 25°C

1200

800

400

0

–28 –24 –20 –16 –12 –8 –4 0 4

INPUT RF POWER (dBm)

8 12

5536 TA01b

5536f

1

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