MAX2209AEBS 查看數據表（PDF） - Maxim Integrated

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MAX2209AEBS

RF Power Detector with Shutdown Control

Maxim Integrated 

RF Power Detector

with Shutdown Control

Detailed Description

The MAX2209A power detector is designed to oper-

ate from 800MHz to 2.0GHz. The device is ideal for

wideband code-division multiple access (WCDMA),

cdma2000M, and high-speed downlink/uplink packet

access. The MAX2209A accepts an RF signal at the

input, and outputs a temperature-independent voltage

related to the input signal power. The output voltage

expressed in dBV is proportional to the input power

expressed in dBm. The device has a detection range

from -25dBm to 0dBm.

Applications Information

The typical application circuit, as taken from the

MAX2209A EV Kit, is shown in Figure 1. The IC can be

shut down by forcing the RFIN/SHDN DC voltage low

through a 2kω resistor. The output of the detector goes

to an ADC for further processing by the baseband sys-

tem. Connect a series resistor and shunt capacitor to the

MAX2209A output to reduce residual amplitude ripple.

The series resistor should not be less than 1kI.

EV kit gerber files, schematic, BOM, and updates are

available on the MAX2209A product page at Maxim’s

website (www.maxim-ic.com).

Layout

There are two areas that require attention: the GND pin

and the supply bypassing. Connect the GND pin to the

PCB ground with a GND via as close as possible, and

bypass VCC to ground with a capacitor as close as pos-

sible to the part.

PA

DIRECTIONAL

TO

ANTENNA

COUPLER

SMA

TEST POINT

7.5kI

ADC

15pF

MAX2209A

A1

A2

OUT

VCC

B1

GND

B2

RFIN/

SHDN

VCC

27pF

RF

INPUT

47pF

2kI

50I

SHDN

Figure 1. Typical Application Circuit from MAX2209A EV Kit

PROCESS: BIPOLAR

Chip Information

Package Information

For the latest package outline information and land patterns,

go to www.maxim-ic.com/packages. Note that a “+”, “#”, or

“-” in the package code indicates RoHS status only. Package

drawings may show a different suffix character, but the drawing

pertains to the package regardless of RoHS status.

PACKAGE

TYPE

4 UCSP

PACKAGE

CODE

B4+4

OUTLINE

NO.

21-0007

LAND

PATTERN NO.

—

cdma2000 is a registered trademark of the Telecommunications

Industry Association.

6   _______________________________________________________________________________________

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