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.
● 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
