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Texas Instruments LMH2100TM/NOPB
- Part No.:
- LMH2100TM/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- RF Detectors
- Package:
- 6-WFBGA, DSBGA
- Datasheet:
-
LMH2100TM/NOPB.pdf
- Description:
- IC RF DETECT 50MHZ-4GHZ 6DSBGA
- Quantity:
- Payment:
- Shipping:
Inventory:259
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Product details
Overview
LMH2100TM/NOPB from Texas Instruments is a 50-MHz to 4-GHz logarithmic RF power detector optimized for CDMA/WCDMA transmit power control. It delivers temperature- and supply-compensated output voltage (0.3 V to 2 V) linear in dB over a −45 dBm to −5 dBm input range, with 0.5-dB accurate temperature compensation and shutdown capability. It operates from 2.7 V to 3.3 V and integrates a 50-Ω RF input termination.
For engineers reviewing the LMH2100TM/NOPB datasheet, LMH2100TM/NOPB pinout, LMH2100TM/NOPB application, or LMH2100TM/NOPB equivalent, this page provides verified functional context, validated pin roles, confirmed RF detection performance across 50 MHz–4 GHz, real-world application implementation guidance, and two technically documented alternative parts for UMTS/CDMA/WLAN power control designs.
Technical Context
The LMH2100TM/NOPB implements a true logarithmic detector architecture with internal transimpedance amplification, enabling direct conversion of RF input power (dBm) into a proportional analog output voltage (V). Its core signal path includes an RF input stage with 50-Ω internal termination, followed by a precision log-conformance amplifier whose output (OUT) is referenced to GND and features differential measurement capability via REF.
It supports external RC filtering configurations-either output-side (RS/CS) or feedback-loop (RP/CP)-to tailor bandwidth and transimpedance gain. Enable (EN) controls active/shutdown modes, placing OUT in high-impedance state during shutdown to preserve external filter charge and minimize quiescent current (≤0.9 µA).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| RF Frequency Range | 50 MHz to 4000 MHz - supports multi-band cellular (CDMA/WCDMA/GSM), WLAN (802.11b/g), and PA module monitoring across sub-1 GHz to 4 GHz bands. |
| Input Power Range | −45 dBm to −5 dBm - enables precise closed-loop transmit power control in mobile handset front-ends without external attenuation. |
| Logarithmic Slope | 34.5 mV/dB (typ. at 1855 MHz) - defines voltage change per dB input shift; stable ±1.0 mV/dB over −40°C to +85°C ensures consistent calibration. |
| Log Conformance Error | ±0.33 dB (max at 1855 MHz, −40 dBm to −10 dBm) - quantifies deviation from ideal log response; critical for <1-dB transmit accuracy in 3GPP-compliant systems. |
| Supply Voltage | 2.7 V to 3.3 V - compatible with single-cell Li-ion and LDO-regulated 3.3-V rails; PSRR ≥55 dB minimizes supply noise coupling into output. |
| Shutdown Current | ≤0.9 µA - enables ultra-low-power sleep mode in battery-operated devices; EN = Low disables internal bias and isolates OUT. |
| Output Voltage Range | 0.3 V to 2.0 V - rail-to-rail compatible with 2.7-V ADCs; pedestal voltage (207–324 mV) subtracted in system calibration. |
Pinout & Package
LMH2100TM/NOPB uses a 6-pin DSBGA (YFQ) package measuring 1.274 mm × 0.874 mm with 0.4-mm pitch. The die is flip-chip mounted; solder balls are on the bottom surface. Thermal resistance RθJA = 133.7°C/W enables operation up to +85°C ambient in compact RF modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1 VDD | Power Supply Input | Positive supply rail (2.7–3.3 V); bypass capacitor required near pin to suppress RF coupling and ensure stable detector bias. |
| B1 RFIN | RF Analog Input | 50-Ω internally terminated RF port; accepts CW or modulated signals from directional coupler or PA output; no external DC blocking needed. |
| C2 EN | Digital Enable Input | Active-high logic control; EN = Low forces shutdown (IDD ≤ 0.9 µA) and places OUT in high-Z state to prevent discharge of external filter capacitors. |
| B2 REF | Differential Reference Output | Inverting input reference for output amplifier; enables pedestal-free differential measurement when used with external op-amp or ADC differential input. |
| A2 OUT | Analog Detector Output | Ground-referenced voltage output (linear in dB); drives ADC directly or feeds external RC low-pass filter (RS/CS) for bandwidth limiting to ~416 kHz. |
| C1 GND | Power Ground | Primary return path for RF, analog, and digital currents; requires low-inductance connection to PCB ground plane beneath package. |
Key Features
| Feature | Design Value |
|---|---|
| 40-dB Logarithmic Detection Range | Enables single-device coverage of full cellular transmit power range (−45 dBm to −5 dBm), eliminating need for gain-switching or multiple detectors. |
| 0.5-dB Accurate Temperature Compensation | Maintains <±0.5 dB error over −40°C to +85°C without external calibration, reducing firmware complexity in handheld thermal environments. |
| External Configurable Output Filter Bandwidth | RS/CS or RP/CP networks allow system-level tuning of detector bandwidth (e.g., 100 kHz for WCDMA, 1 MHz for LTE burst detection) without changing IC. |
| High-Impedance Shutdown Mode | OUT enters tri-state during EN = Low, preserving charge on external filter capacitors and preventing power loss in sleep cycles. |
| Integrated 50-Ω RF Input Termination | Eliminates need for external matching network at RFIN, simplifying layout and improving repeatability across production units. |
Applications
| UMTS/WCDMA Handset PA Control | GSM/GPRS Power Amplifier Feedback |
|---|---|
Use Scenario: Real-time closed-loop control of 3G transmit power in mobile handsets using a directional coupler sampling PA output. IC Role / Device Role / Timing Role: RF power detector providing analog voltage proportional to PA output level; sampled by baseband ADC at ~100 kSPS for DAC-driven PA bias adjustment. Use Value: Achieves ±0.5 dB transmit accuracy over temperature and battery voltage variation, meeting 3GPP TS 25.101 power tolerance requirements. |
Use Scenario: Monitoring GSM Class 4/Class 1 PA output during TDMA burst transmission to enforce spectral mask and peak power limits. IC Role / Device Role / Timing Role: Fast-response detector (tR/tF ≤ 12 µs) capturing burst envelope; OUT filtered to match GSM modulation bandwidth (~200 kHz). Use Value: Enables dynamic PA gain adjustment within 1–2 bursts, preventing adjacent channel leakage and ensuring compliance with ETSI EN 301 511. |
| IEEE 802.11b/g WLAN Transmitter Calibration | Multi-Band Cellular Front-End Module Monitoring |
Use Scenario: Factory calibration of 2.4-GHz WLAN power amplifier linearity and output power across channels and data rates. IC Role / Device Role / Timing Role: Precision log detector measuring CW and OFDM-modulated signals; REF/OUT differential pair rejects common-mode noise in test fixtures. Use Value: Delivers ±0.33 dB conformance error at 2400–2500 MHz, enabling one-time calibration across 802.11b/g bands without per-channel trimming. |
Use Scenario: Embedded power monitoring inside integrated front-end modules (FEMs) supporting LTE Bands 1/3/7/40/41 alongside legacy 2G/3G. IC Role / Device Role / Timing Role: Wideband detector (50 MHz–4 GHz) placed post-antenna switch to monitor total RF output regardless of band selection. Use Value: Single-component solution replaces multiple narrowband detectors, reducing BOM count and PCB area in space-constrained FEM packages. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar RF logarithmic power detection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADL5513ACPZ-R7 | Wider frequency range (30 MHz–4 GHz), higher slope (45 mV/dB), but requires external 50-Ω termination and dual supply (3.3 V + −2.5 V). | Used in wideband test equipment; less suited for battery-powered handsets due to higher supply complexity and 12.5 mA active current. | Select ADL5513 if system requires >40 dB dynamic range or operation below 50 MHz; verify layout supports dual-supply decoupling. |
| MAX2016ETE+ | Narrower RF range (100 MHz–2.5 GHz), integrated temperature sensor, but fixed 30-dB detection range and no REF pin for differential measurement. | Common in GPS and ISM-band IoT transceivers; lacks the multi-band cellular optimization and pedestal cancellation capability of LMH2100TM/NOPB. | Choose MAX2016 for cost-sensitive GPS tracking modules where 100 MHz–2.5 GHz coverage suffices and differential output is unnecessary. |
Compared with ADL5513ACPZ-R7 and MAX2016ETE+, the LMH2100TM/NOPB offers superior integration for cellular handset designs: single 2.7–3.3 V supply, internal 50-Ω termination, REF/OUT differential interface, and guaranteed ±0.5 dB temperature stability across −40°C to +85°C - all in a 1.27 mm × 0.87 mm DSBGA package.
Availability
LMH2100TM/NOPB is available at Aetrix Electronics and suitable for UMTS/WCDMA handset design, GSM/GPRS power amplifier feedback, and IEEE 802.11b/g WLAN transmitter calibration requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for LMH2100TM/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 company headquartered in Dallas, Texas, delivering analog and embedded processing solutions for industrial, automotive, personal electronics, and communications markets.
The LMH2100TM/NOPB belongs to TI's RF power detector product line, engineered specifically for accurate, temperature-stable RF power measurement in multi-standard cellular handsets and wireless infrastructure equipment.
FAQ
What is the RF input impedance of the LMH2100TM/NOPB?
The LMH2100TM/NOPB features an internally matched 50-Ω RF input impedance at RFIN, verified across 50 MHz–4 GHz with typical RIN = 46.7–56.4 Ω. This eliminates the need for external matching components in most 50-Ω system interfaces, simplifying PCB layout and improving measurement repeatability in production.
How does the LMH2100TM/NOPB achieve temperature compensation?
The LMH2100TM/NOPB achieves 0.5-dB accurate temperature compensation through on-die circuitry that dynamically adjusts bias and gain to counteract semiconductor parameter drift. Measured variation over −40°C to +85°C is ≤0.35 dB (EVOT) for −40 dBm ≤ PIN ≤ −10 dBm, enabling stable power control without external calibration.
Can the LMH2100TM/NOPB be used with a directional coupler?
Yes - the LMH2100TM/NOPB is explicitly designed for use with 30-dB directional couplers, as stated in its datasheet. Its −45 dBm to −5 dBm input range matches typical coupled-port levels from 30-dB couplers sampling 20–33 dBm PA outputs, making it ideal for direct integration into cellular PA feedback loops.
What is the purpose of the REF pin on the LMH2100TM/NOPB?
The REF pin on the LMH2100TM/NOPB provides the inverting input reference for the internal output amplifier, enabling differential measurement of the detector output. When used with an external op-amp or differential-input ADC, REF allows pedestal voltage subtraction, improving dynamic range and measurement accuracy in noisy RF environments.
Does the LMH2100TM/NOPB support external output filtering?
Yes - the LMH2100TM/NOPB supports two external filtering configurations: (1) output-side RC low-pass (RS/CS) for bandwidth limiting, and (2) feedback-loop RC (RP/CP) to adjust transimpedance gain and pole location. Both methods are documented in the datasheet with design equations and typical values for 100 kHz–1 MHz applications.
LMH2100TM/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Frequency:
- 50MHz ~ 4GHz
- RF Type:
- Cellular, W-CDMA, CDMA, GSM, UMTS
- Input Range:
- -45dBm ~ -5dBm
- Accuracy:
- ±0.5dB
- Voltage - Supply:
- 2.7V ~ 3.3V
- Mounting Type:
- 9.2 mA
- Supplier Device Package:
- Surface Mount
- Current - Supply:
- 6-DSBGA
LMH2100TM/NOPB FAQ
1.How can I place an order for LMH2100TM/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMH2100TM/NOPB on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for LMH2100TM/NOPB reliable?
The price and inventory of LMH2100TM/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMH2100TM/NOPB is usually 5 days.
3.What payment methods are accepted for LMH2100TM/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMH2100TM/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMH2100TM/NOPB?
LMH2100TM/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMH2100TM/NOPB order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for LMH2100TM/NOPB?
For technical support, including LMH2100TM/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMH2100TM/NOPB requirements.
6.How does Aetrix verify that LMH2100TM/NOPB is sourced from the original manufacturer or authorized distributors?
All LMH2100TM/NOPB products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that LMH2100TM/NOPB meets industry standards.
7.What is the process for return or replacement of LMH2100TM/NOPB?
All LMH2100TM/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMH2100TM/NOPB, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The LMH2100TM/NOPB part is unused and in its original packaging.
Return procedure for LMH2100TM/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LMH2100TM/NOPB Tags
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