LMH2100中文资料用于 CDMA 和 WCDMA 的 50MHz 至 4GHz 40dB 对数功率检测器数据手册TI规格书

描述 Description

The LMH2100 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 to4 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 LMH2100 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 realized 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 will lower 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.

特性 Features

• Supply Voltage: 2.7 V to 3.3 V
• Output Voltage: 0.3 V to 2 V
• 40-dB Linear in dB Power Detection Range
• Shutdown
• Multi-Band Operation from 50 MHz to 4 GHz
• 0.5-dB Accurate Temperature Compensation
• External Configurable Output Filter Bandwidth
• 0.4-mm Pitch DSBGA Package