PA

ANTENNA

OUT

LMV226/

LMV228

RF

ENABLE

10 k:

GND

50:

C

100 pF

PA

ANTENNA

OUT

RF

GND

LMV225

1.8 k:

10 k:

ENABLE

C

100 pF

LMV225, LMV226, LMV228

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SNWS013L – AUGUST 2003 – REVISED MARCH 2013

LMV225/LMV226/LMV228 RF Power Detector for CDMA and WCDMA

Check for Samples: LMV225, LMV226, LMV228

1

FEATURES

DESCRIPTION

The LMV225/LMV226/LMV228 are 30 dB RF power

2

•

30 dB Linear in dB Power Detection Range

detectors intended for use in CDMA and WCDMA

•

Output Voltage Range 0.2 to 2V

applications. The device has an RF frequency range

•

Logic Low Shutdown

from 450 MHz to 2 GHz. It provides an accurate

temperature and supply compensated output voltage

•

Multi-Band Operation from 450 MHz to 2000

that relates linearly to the RF input power in dBm.

MHz

The circuit operates with a single supply from 2.7V to

•

Accurate Temperature Compensation

5.5V.

The

LMV225/LMV226/LMV228

have

an

•

Packages:

integrated filter for low-ripple average power detection

of CDMA signals with 30 dB dynamic range.

–

DSBGA Thin 1.0 mm x 1.0 mm x 0.6 mm

Additional filtering can be applied using a single

–

DSBGA Ultra Thin 1.0 mm x 1.0 mm x 0.35

external capacitor.

mm

The LMV225 has an RF power detection range from

–

WSON 2.2 mm x 2.5 mm x 0.8 mm

–30 dBm to 0 dBm and is ideally suited for direct use

–

(LMV225 and LMV228)

in

combination

with

resistive

taps.

The

LMV226/LMV228 have a detection range from –15

APPLICATIONS

dBm to 15 dBm and are intended for use in

combination with a directional coupler. The LMV226

•

CDMA RF Power Control

is equipped with a buffered output which makes it

•

WCDMA RF Power Control

suitable

for

GSM,

EDGE,

GPRS

and

TDMA

•

CDMA2000 RF Power Control

applications.

•

PA Modules

The device is active for Enable = HI, otherwise it is in

a low power consumption shutdown mode. During

shutdown the output will be LOW. The output voltage

ranges from 0.2V to 2V and can be scaled down to

meet ADC input range requirements.

The LMV225/LMV226/LMV228 power detectors are

offered in the thin 1.0 mm x 1.0 mm x 0.6 mm

DSBGA package and the ultra thin 1.0 mm x 1.0 mm

x 0.35 mm DSBGA package. The LMV225 and the

LMV228 are also offered in the 2.2 mm x 2.5 mm x

0.8 mm WSON package.

Typical Application

Figure 1. LMV225

Figure 2. LMV226/LMV228

1

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

2

All trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Copyright © 2003–2013, Texas Instruments Incorporated

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.