1 Features
1• 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

2 Applications
• Multi-Mode, Multi-Band RF Power Control
– GSM/EDGE
– CDMA/CDMA2000
– W-CDMA
– OFDMA
– LTE
• Infrastructure RF Power Control

3 Description
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.