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
Output Voltage Range 0.2 to 2V
Logic Low Shutdown
detectors intended for use in CDMA and WCDMA
applications. The device has an RF frequency range
from 450 MHz to 2 GHz. It provides an accurate
temperature and supply compensated output voltage
that relates linearly to the RF input power in dBm.
The circuit operates with a single supply from 2.7V to
5.5V. The LMV225/LMV226/LMV228 have an
integrated filter for low-ripple average power detection
of CDMA signals with 30 dB dynamic range.
Additional filtering can be applied using a single
external capacitor.
Multi-Band Operation from 450 MHz to 2000
MHz
•
•
Accurate Temperature Compensation
Packages:
–
–
DSBGA Thin 1.0 mm x 1.0 mm x 0.6 mm
DSBGA Ultra Thin 1.0 mm x 1.0 mm x 0.35
mm
The LMV225 has an RF power detection range from
–30 dBm to 0 dBm and is ideally suited for direct use
–
WSON 2.2 mm x 2.5 mm x 0.8 mm
–
(LMV225 and LMV228)
in
combination
with
resistive
taps.
The
LMV226/LMV228 have a detection range from –15
dBm to 15 dBm and are intended for use in
combination with a directional coupler. The LMV226
is equipped with a buffered output which makes it
suitable for GSM, EDGE, GPRS and TDMA
applications.
APPLICATIONS
•
•
•
•
CDMA RF Power Control
WCDMA RF Power Control
CDMA2000 RF Power Control
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
ANTENNA
RF
PA
ANTENNA
RF
PA
R
1
V
DD
1.8 kW
C
50W
V
DD
100 pF
LMV225
C
RF /E
IN
N
100 pF
OUT
LMV226/
LMV228
R
2
RF /E
IN
N
10 kW
ENABLE
OUT
GND
ENABLE
R
2
GND
10 kW
Figure 1. LMV225
Figure 2. LMV226/LMV228
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2
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2003–2013, Texas Instruments Incorporated