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LMV232 Dataheets PDF



Part Number LMV232
Manufacturers National Semiconductor
Logo National Semiconductor
Description Dual-Channel Integrated Mean Square Power Detector for CDMA & WCDMA
Datasheet LMV232 DatasheetLMV232 Datasheet (PDF)

LMV232 Dual-Channel Integrated Mean Square Power Detector for CDMA & WCDMA February 2005 LMV232 Dual-Channel Integrated Mean Square Power Detector for CDMA & WCDMA General 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 certifi.

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LMV232 Dual-Channel Integrated Mean Square Power Detector for CDMA & WCDMA February 2005 LMV232 Dual-Channel Integrated Mean Square Power Detector for CDMA & WCDMA General 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. 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. 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. The dual mean square detector is offered in an 8-bump micro SMD 1.5 x 1.5 x 0.6 mm package. This micro SMD package has the smallest footprint and height. Features n n n n n n n > 20 dB square-law detection range 2 sequentially selectable RF inputs Low power consumption shutdown mode Externally configurable gain and LF filter bandwidth. Internal 50Ω RF termination impedance Optimized for use with 20 dB directional coupler Lead free 8-bump micro SMD package 1.5 x 1.5 x 0.6 mm Applications n n n n n n n n 3G mobile communications UMTS WCDMA CDMA2000 TD-SCDMA RF control Wireless LAN PC Card and GPS modules Typical Application 20127801 © 2005 National Semiconductor Corporation DS201278 www.national.com LMV232 Absolute Maximum Ratings (Note 1) If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Supply Voltage VDD - GND ESD Tolerance (Note 2) Human Body Model Machine Model Storage Temperature Range 2000V 200V -65˚C to 150˚C 3.6V Max Junction Temperature (Note 3) Mounting Temperature Infrared or Convection (20 sec) 150˚C Max 235˚C Operating Ratings (Note 1) Supply Voltage Operating Temperature Range RF Frequency Range 2.5V to 3.3V -40˚C to +85˚C 50 MHz to 2 GHz 2.7 DC and AC Electrical Characteristics Unless otherwise specified, all limits are guaranteed to VDD = 2.7V; TJ = 25˚C. Boldface limits apply at temperature extremes. (Note 4) Symbol IDD Parameter Supply Current Condition Active Mode: SD = LOW, No RF Input Power Present Shutdown: SD = 1.8V, No RF Input Power Present VLOW VHIGH IBS, ISD VOUT BS and SD Logic Low Level (Note 6) BS and SD Log.


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