Product details

Frequency (min) (MHz) 50 Frequency (max) (MHz) 3000 Type Logarithmic Supply voltage (min) (V) 2.7 Supply voltage (max) (V) 3.3 Supply current (µA) 7200 Number of channels 1 Dynamic range (typ) (dB) 40 Operating temperature range (°C) -40 to 85 Rating Catalog
Frequency (min) (MHz) 50 Frequency (max) (MHz) 3000 Type Logarithmic Supply voltage (min) (V) 2.7 Supply voltage (max) (V) 3.3 Supply current (µA) 7200 Number of channels 1 Dynamic range (typ) (dB) 40 Operating temperature range (°C) -40 to 85 Rating Catalog
WSON (NGF) 6 5.5 mm² 2.5 x 2.2
  • 2.7-V to 3.3-V Supply Voltage
  • 40-dB Linear in dB Power Detection Range
  • 0.3-V to 2-V Output Voltage Range
  • Shutdown
  • Multi-Band Operation from 50 MHz to 3.5 GHz
  • 0.5-dB Accurate Temperature Compensation
  • External Configurable Output Filter Bandwidth
  • 2.5 mm × 2.2 mm × 0.8 mm 6-pin WSON Package
  • 2.7-V to 3.3-V Supply Voltage
  • 40-dB Linear in dB Power Detection Range
  • 0.3-V to 2-V Output Voltage Range
  • Shutdown
  • Multi-Band Operation from 50 MHz to 3.5 GHz
  • 0.5-dB Accurate Temperature Compensation
  • External Configurable Output Filter Bandwidth
  • 2.5 mm × 2.2 mm × 0.8 mm 6-pin WSON Package

The LMV221 is a 40-dB RF power detector intended for use in CDMA and WCDMA applications. The device has an RF frequency range from 50 MHz to 3.5 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 2.7 V to 3.3 V.

The LMV221 has an RF power detection range from −45 dBm to −5 dBm and is ideally suited for direct use in combination with a 30-dB directional coupler. Additional low-pass filtering of the output signal can be achieved by means of an external resistor and capacitor. shows a detector with an additional output low pass filter. The filter frequency is set with RS and CS.

shows a detector with an additional feedback low pass filter. Resistor RP is optional and lowers the trans-impedance gain (RTRANS). The filter frequency is set with CP//CTRANS and RP//RTRANS.

The device is active for Enable = High, otherwise it is in a low power consumption shutdown mode. To save power and prevent discharge of an external filter capacitance, the output (OUT) is high-impedance during shutdown.

For all available packages, see the orderable addendum at the end of the data sheet.

The LMV221 is a 40-dB RF power detector intended for use in CDMA and WCDMA applications. The device has an RF frequency range from 50 MHz to 3.5 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 2.7 V to 3.3 V.

The LMV221 has an RF power detection range from −45 dBm to −5 dBm and is ideally suited for direct use in combination with a 30-dB directional coupler. Additional low-pass filtering of the output signal can be achieved by means of an external resistor and capacitor. shows a detector with an additional output low pass filter. The filter frequency is set with RS and CS.

shows a detector with an additional feedback low pass filter. Resistor RP is optional and lowers the trans-impedance gain (RTRANS). The filter frequency is set with CP//CTRANS and RP//RTRANS.

The device is active for Enable = High, otherwise it is in a low power consumption shutdown mode. To save power and prevent discharge of an external filter capacitance, the output (OUT) is high-impedance during shutdown.

For all available packages, see the orderable addendum at the end of the data sheet.

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Technical documentation

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Type Title Date
* Data sheet LMV221 50-MHz to 3.5-GHz 40-dB Logarithmic Power Detector for CDMA and WCDMA datasheet (Rev. D) PDF | HTML 01 Jun 2016
Selection guide Power Management Guide 2018 (Rev. R) 25 Jun 2018
User guide Evaluation Board for the LMV221 Logarithmic Power Detector (Rev. A) 22 Apr 2013

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