The LMH2110 is a 45-dB Logarithmic RMS power detector particularly suited for accurate power measurement of modulated RF signals that exhibit large peak-to-average ratios; that is, large variations of the signal envelope. Such signals are encountered in W-CDMA and LTE cell phones. The RMS measurement topology inherently ensures a modulation insensitive measurement.

The device has an RF frequency range from 50 MHz to 8 GHz. It provides an accurate, temperature and supply insensitive output voltage that relates linearly to the RF input power in dBm. The LMH2110 device has excellent conformance to a logarithmic response, enabling easy integration by using slope and intercept only, reducing calibration effort significantly. The device operates with a single supply from 2.7 V to 5 V. The LMH2110 has an RF power detection range from –40 dBm to 5 dBm and is ideally suited for use in combination with a directional coupler. Alternatively, a resistive divider can be used.

The device is active for EN = 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.

• Wide Supply Range from 2.7 V to 5 V
• Logarithmic Root Mean Square Response
• 45-dB Linear-in-dB Power Detection Range
• Multi-Band Operation from 50 MHz to 8 GHz
• LOG Conformance Better than ±0.5 dB
• Highly Temperature Insensitive, ±0.25 dB
• Modulation Independent Response, 0.08 dB
• Minimal Slope and Intercept Variation
• Shutdown Functionality
• Tiny 6-Bump DSBGA Package

• Frequency (Min) (MHz)
• 50
• Frequency (Max) (MHz)
• 8000
• Type
• RMS
• Supply voltage (Min) (V)
• 2.7
• Supply voltage (Max) (V)
• 5
• Supply current (mA)
• 4.8
• Number of channels (#)
• 1
• Dynamic range (Typ) (dB)
• 45

LMH2110的完整型号有：LMH2110TM/NOPB、LMH2110TMX/NOPB，以下是这些产品的关键参数及官网采购报价：

LMH2110TM/NOPB，工作温度：-40 to 85，封装：DSBGA (YFQ)-6，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LMH2110TM/NOPB的批量USD价格：1.068（1000+）

LMH2110TMX/NOPB，工作温度：-40 to 85，封装：DSBGA (YFQ)-6，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LMH2110TMX/NOPB的批量USD价格：0.89（1000+）

LMH2110TMEVAL — LMH2110 评估板

The evaluation board is designed to help the evaluation of the LMH2110, which is a 45 dB Logarithmic RMS power detector particularly suited for accurate power measurement of modulated RF signals that exhibit large peak-to-average ratios, i.e. large variations of the signal envelope. Such signals (...)

TIDA-00897 — 用于 WLAN 应用的高精度对数 RMS 功率检测器参考设计

动态发射功率控制对于在无线局域网 (WLAN) 中提高频谱效率和减少相邻信道干扰至关重要。此外，全球各地的监管机构都要求将发射功率限制在一定水平，以便减少对其他通信设备的干扰。在 WLAN 系统中控制发射功率的另一个好处是，可以通过降低功率放大器的电源电压来延长电池寿命。此参考设计展示了针对 WLAN 应用的闭环动态发射功率控制。尽管此特定设计实现的是 WLAN 发射功率控制，但对于其他无线技术（例如 LTE），也可使用类似的概念来实施功率控制方案。

发射功率控制的应用范围非常广泛：从移动手持设备到工业再到汽车应用均适用。例如，LMH2110 可用于汽车电子产品，从而满足 LTE 或 WiFi (...)