The LMV225/LMV226/LMV228 are 30 dB RF power 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.

The LMV225 has an RF power detection range from –30 dBm to 0 dBm and is ideally suited for direct use 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.

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.

• 30 dB Linear in dB Power Detection Range
• Output Voltage Range 0.2 to 2V
• Logic Low Shutdown
• 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
  • WSON 2.2 mm x 2.5 mm x 0.8 mm(LMV225 and LMV228)

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• Frequency (Min) (MHz)
• 450
• Frequency (Max) (MHz)
• 2000
• Type
• Logarithmic
• Supply voltage (Min) (V)
• 2.7
• Supply voltage (Max) (V)
• 5
• Supply current (mA)
• 4.9
• Number of channels (#)
• 1
• Dynamic range (Typ) (dB)
• 30

LMV228的完整型号有：LMV228SD/NOPB、LMV228TL/NOPB、LMV228TLX/NOPB，以下是这些产品的关键参数及官网采购报价：

LMV228SD/NOPB，工作温度：PropertyValue，封装：WSON (NGF)-6，包装数量MPQ：1000个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：SN，TI官网LMV228SD/NOPB的批量USD价格：.511（1000+）

LMV228TL/NOPB，工作温度：-40 to 85，封装：DSBGA (YZR)-4，包装数量MPQ：250个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：SNAGCU，TI官网LMV228TL/NOPB的批量USD价格：.558（1000+）

LMV228TLX/NOPB，工作温度：-40 to 85，封装：DSBGA (YZR)-4，包装数量MPQ：3000个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：SNAGCU，TI官网LMV228TLX/NOPB的批量USD价格：.486（1000+）

LMV228TLEVAL — 用于 LMV228 microSMD 射频检测器的评估板

This board can be used to evaluate National Semiconductor's LMV225/LMV226/LMV228 RF detectors. These logarithmic power detectors are intended for use in CDMA and WCDMA applications. They have a 30 dB dynamic range and an RF frequency range from 450 MHz to 2 GHz. The LMV226/LMV228 are designed to be (...)