Texas Instruments LMH2110TM/NOPB

Overview

LMH2110TM/NOPB from Texas Instruments is an 8-GHz logarithmic RMS power detector IC designed for accurate RF power measurement in multi-standard cellular transceivers. It delivers ±0.5 dB log conformance over a 45-dB dynamic range (–40 dBm to +5 dBm), operates from 2.7 V to 5 V, and features shutdown mode with high-impedance output. It is used in W-CDMA/LTE handset power control loops with directional couplers.

For engineers reviewing the LMH2110TM/NOPB datasheet, LMH2110TM/NOPB pinout, LMH2110TM/NOPB application, or LMH2110TM/NOPB equivalent, key selection criteria include its RMS-based modulation independence, temperature-insensitive slope (±0.25 dB), 1900 MHz log conformance error ≤ ±0.5 dB, 6-bump DSBGA package footprint, and enable-controlled shutdown with <1 µA quiescent current.

Technical Context

The LMH2110TM/NOPB implements true RMS detection using an exponential amplifier architecture with internal LDO regulation, enabling supply-insensitive operation across 2.7–5 V. Its RF input is internally terminated to 50 Ω at B1 (RFIN), and output voltage scales linearly with input power in dBm (44.3 mV/dB typical slope at 1900 MHz).

It supports multi-band RF power monitoring from 50 MHz to 8 GHz with frequency-dependent log conformance: ±0.5 dB error at 1900 MHz within –36 dBm to 0 dBm, ±0.3 dB step accuracy, and <19 µs turn-on time. EN pin (C2) controls active/shutdown modes, with output high-impedance during shutdown to preserve external filter charge.

Key Specifications

Pinout & Package

LMH2110TM/NOPB uses a 6-bump DSBGA (YFQ) package measuring 1.27 mm × 0.87 mm with 0.4-mm pitch. The package is bottom-side solderable and optimized for RF layout with minimal parasitic inductance.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar logarithmic RMS power detector applications.

Compared with ADL5511ACPZ-R7 and MAX2016ETE+, the LMH2110TM/NOPB uniquely balances 8-GHz bandwidth, ultra-low shutdown current (<1 µA), and integrated LDO in a 1.27 mm × 0.87 mm package-making it optimal for space- and power-constrained mobile RF front-ends requiring wideband RMS detection.

Availability

LMH2110TM/NOPB is available at Aetrix Electronics and suitable for multi-mode cellular handsets, small-cell base stations, Wi-Fi 6E front-ends, and portable RF test equipment requiring stable component supply and long-term lifecycle support.

Supply support for LMH2110TM/NOPB includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and connectivity technologies with decades of RF IC design expertise.

The LMH2110TM/NOPB belongs to TI's high-frequency RF detector product line, engineered specifically for accurate, modulation-agnostic power measurement in battery-powered wireless communication devices.

FAQ

What is the RF input impedance of the LMH2110TM/NOPB?

The LMH2110TM/NOPB features a 50 Ω internally terminated RF input at pin B1 (RFIN), verified across 50 MHz–8 GHz. This eliminates the need for external matching networks in most 50-Ω system designs and ensures consistent log conformance regardless of source VSWR within specified limits.

Does the LMH2110TM/NOPB require external calibration for accurate power measurement?

No. The LMH2110TM/NOPB achieves ±0.5 dB log conformance at 1900 MHz with only slope and intercept calibration-typically performed once per band during production. Its ±0.25 dB temperature drift and 45-dB dynamic range eliminate need for per-unit or real-time calibration in field operation.

How does the LMH2110TM/NOPB handle modulated signals like LTE or W-CDMA?

The LMH2110TM/NOPB uses true RMS detection architecture, delivering modulation-independent response. Measured input-referred variation is only 0.08 dB for W-CDMA and 0.19 dB for LTE under –38 dBm to –5 dBm conditions-enabling reliable closed-loop power control without envelope tracking complexity.

What is the maximum RF input power the LMH2110TM/NOPB can tolerate continuously?

The absolute maximum RF input power for the LMH2110TM/NOPB is 12 dBm, per its Absolute Maximum Ratings table. For reliable operation within specifications, RF input should be limited to –40 dBm to +5 dBm-the validated 45-dB dynamic range where log conformance error remains ≤ ±0.5 dB.

Can the LMH2110TM/NOPB be used with a resistive divider instead of a directional coupler?

Yes. The LMH2110TM/NOPB datasheet explicitly states that a resistive divider is a valid alternative to a directional coupler for RF sampling. Designers must account for divider loss and ensure RFIN stays within –40 dBm to +5 dBm; the 50 Ω input termination remains effective with proper divider design.