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LMV232 PDF预览

LMV232

更新时间: 2024-11-21 11:15:31
品牌 Logo 应用领域
德州仪器 - TI /
页数 文件大小 规格书
19页 1286K
描述
用于 CDMA 和 WCDMA 的双通道集成均方根功率检测器

LMV232 数据手册

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LMV232  
www.ti.com  
SNWS017C DECEMBER 2004REVISED MARCH 2013  
LMV232 Dual-Channel Integrated Mean Square Power Detector for CDMA & WCDMA  
Check for Samples: LMV232  
1
FEATURES  
DESCRIPTION  
The LMV232 dual RF detector is designed for RF  
transmit power measurement in mobile phones. This  
dual mean square IC is especially suited for accurate  
power measurement of RF signals exhibiting high  
peak-to-average ratios used in 3G and UMTS/CDMA  
applications. The LMV232 saves calibration steps  
and system certification and is highly accurate. The  
circuit operates with a single supply from 2.5 to 3.3V.  
>20 dB Square-Law Detection Range  
2 Sequentially Selectable RF Inputs  
Low Power Consumption Shutdown Mode  
Externally Configurable Gain and LF Filter  
Bandwidth.  
Internal 50RF Termination Impedance  
Optimized for Use with 20 dB Directional  
Coupler  
The LMV232 contains a mean square detector with  
two sequentially selectable RF inputs. The RF input  
power range of the device has been optimized for use  
with a 20 dB directional coupler, without the need for  
additional external components. A single external RC  
combination between FB and OUT provides an  
externally configurable gain and LF filter bandwidth of  
the device.  
Lead Free 8-Bump DSBGA Package 1.5 x 1.5 x  
0.6 mm  
APPLICATIONS  
3G Mobile Communications  
UMTS  
The device has two digital interfaces. A shutdown  
function is available to set the device in a low-power  
shutdown mode. In case SD = HIGH, the device is in  
shutdown, if SD = LOW the device is active. The  
Band-Select function controls the selection of the  
active RF input channel. In case BS = HIGH, RFIN1 is  
active. In case BS = LOW, RFIN2 is active.  
WCDMA  
CDMA2000  
TD-SCDMA  
RF Control  
Wireless LAN  
PC Card and GPS Modules  
The dual mean square detector is offered in an 8-  
bump DSBGA 1.5 x 1.5 x 0.6 mm package. This  
DSBGA package has the smallest footprint and  
height.  
TYPICAL APPLICATION  
RF  
INPUT  
COUPLER  
ANTENNA  
PA1  
R2  
50W  
RF  
INPUT  
COUPLER  
PA2  
R3  
50W  
V
DD  
B3  
GND  
A1  
B1  
TO BASEBAND  
OUT  
FB  
RF  
RF  
1
2
IN  
IN  
A3  
C1  
1.5 nF  
R1  
6.2 kW  
LMV232  
C1  
A2  
C2  
C3  
SD  
BS  
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.  
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 © 2004–2013, Texas Instruments Incorporated  
 

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