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Texas Instruments LMV242LD/NOPB
- Part No.:
- LMV242LD/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- RF Power Controller ICs
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
LMV242LD/NOPB.pdf
- Description:
- IC RF PWR CNTRL PA 2GHZ 10WSON
- Quantity:
- Payment:
- Shipping:
Inventory:1,742
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Product details
Overview
LMV242LD/NOPB from Texas Instruments is a dual-output RF power amplifier controller IC with integrated 50dB logarithmic RF detector, operating from 450MHz to 2GHz. It delivers two independently selectable PA control outputs (OUT1/OUT2), supports GPRS-compliant transmit timing, and features external loop compensation via COMP1/COMP2 pins for stable closed-loop power control in GSM/GPRS mobile phone PA modules.
For engineers reviewing the LMV242LD/NOPB datasheet, LMV242LD/NOPB pinout, LMV242LD/NOPB application, or LMV242LD/NOPB equivalent, this device is selected for precise, temperature-stable RF output power regulation in multi-band TDMA/GSM transmitters-especially where dual-PA support, ramp filtering, and shutdown-mode power savings are required.
Technical Context
The LMV242LD/NOPB implements a dual-channel closed-loop architecture: each channel integrates an RF log detector, ramp-to-current converter, and error amplifier driving a dedicated output (OUT1 or OUT2). Band Select (BS) digitally routes internal compensation and output drive between channels, enabling independent control of two PAs in a single module.
It operates from 2.6V to 5.5V, supports Schmitt-triggered digital inputs (TX_EN, BS), and uses an external RC network between COMP1 and COMP2 to set loop stability-critical for meeting GSM time-mask requirements (e.g., ≤28μs PA ramp). Temperature-compensated detection ensures <±1.5dB log conformance across −40°C to +85°C at 900–2000MHz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| RF Frequency Range | 450MHz to 2GHz - covers GSM850/900, DCS1800, PCS1900, and TD-SCDMA bands. |
| Log Detection Range | 50dB - enables accurate closed-loop control over full PA dynamic range (e.g., −50dBm to 0dBm input). |
| Supply Voltage | 2.6V to 5.5V - compatible with single-supply battery-powered mobile baseband rails. |
| Operating Temperature | −40°C to +85°C - qualified for industrial-grade mobile handset environments. |
| Shutdown Current | 0.2µA to 30µA - ultra-low quiescent draw during RX slot to extend battery life. |
| Log Slope (1800MHz) | −1.62 µA/dB - defines current output change per dB RF input shift; used to calibrate VRAMP-to-POUT mapping. |
| VRAMP Input Range | 0.2V to 1.8V - linear control voltage domain that sets target PA output power with monotonic response. |
Pinout & Package
LMV242LD/NOPB is housed in a 10-pin WSON package (3mm × 3mm, NGY footprint), optimized for compact PA modules. Thermal pad on underside requires solder connection to PCB ground plane for thermal management and electrical stability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RFIN | Analog RF input | Accepts coupled RF signal (e.g., from directional coupler); DC resistance = 55.7Ω; input impedance varies with frequency (e.g., ~50Ω at 900MHz). |
| VDD | Power supply | Single positive supply (2.6V–5.5V); powers all internal blocks including detectors and error amplifiers. |
| GND | Ground reference | Common return for analog/digital circuits; pin 10 is primary ground; pin 8 is secondary ground (LMV242 variant). |
| BS | Digital band select | Schmitt-triggered input: high selects OUT1, low selects OUT2; enables dual-PA switching without external logic. |
| TX_EN | Digital enable/shutdown | Schmitt-triggered control: high enables operation; low forces shutdown mode with outputs pulled low (<100mV). |
| VRAMP | Analog power setpoint | 0.2V–1.8V input sets target PA output level; transconductance = 96 µA/V typical; includes 206mV deadband. |
| COMP2 | Compensation node | Switched by BS to connect to either OUT1 or OUT2 path; forms integrator node with external RC on COMP1. |
| COMP1 | Compensation node | Connects external RC (e.g., 68pF + 0Ω) to COMP2; sets closed-loop bandwidth and stability for PA control loop. |
| OUT1 | PA control output 1 | Drives gain-control input (VAPC) of first PA; sourcing/sinking capability up to 31.5mA; rail-to-rail swing limited to ±105mV. |
| OUT2 | PA control output 2 | Drives second PA's VAPC; identical specs to OUT1; disabled (pulled low) when BS = high. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent PA control outputs | Enables simultaneous or alternating control of two PAs (e.g., GSM + DCS bands) using one IC and shared VRAMP/enable logic. |
| Integrated 50dB log RF detector | Provides temperature-stable, frequency-calibrated detection (±1.5dB error) across 450–2000MHz without external diodes or op amps. |
| External loop compensation | RC network between COMP1 and COMP2 allows tuning of closed-loop bandwidth and phase margin to meet GSM time-mask (≤28μs ramp). |
| GPRS-compliant timing support | Sub-6μs turn-on time and programmable ramp profile ensure compliance with GPRS Class 12 burst envelope requirements. |
| Accurate temperature compensation | Maintains log conformance within ±1.5dB over −40°C to +85°C, eliminating need for system-level temperature calibration. |
Applications
| GSM/GPRS Mobile Phone Transmitter | Dual-Band PA Module Control |
|---|---|
Use Scenario: Regulating RF output power in quad-band GSM handsets supporting GSM850/900 and DCS1800/PCS1900 bands. IC Role / Device Role / Timing Role: Dual-output PA controller providing independent VAPC signals to two PAs, synchronized to TX_EN and VRAMP timing for GPRS burst envelopes. Use Value: Eliminates need for two discrete controllers; reduces BOM count and PCB area while maintaining <±1.5dB power accuracy across temperature and frequency. |
Use Scenario: Managing separate power amplifiers in a single front-end module-one for low-band (GSM), one for high-band (DCS/PCS). IC Role / Device Role / Timing Role: Band-selectable controller routing VRAMP and compensation to either OUT1 or OUT2 based on BS logic state. Use Value: Enables seamless band switching with no software reconfiguration; maintains consistent closed-loop dynamics across both PAs. |
| TD-SCDMA Transmit Power Control | Pulse RF Control in Wireless LAN |
Use Scenario: Closed-loop transmit power regulation in TD-SCDMA base stations or user equipment requiring fast settling and wide dynamic range. IC Role / Device Role / Timing Role: Log detector + error amplifier implementing integrator-based control loop with externally tuned stability via COMP1/COMP2. Use Value: Achieves ≤28μs PA ramp time and <±1.5dB power accuracy-meeting TD-SCDMA time-mask and linearity requirements. |
Use Scenario: Pulse-modulated RF power control in 2.4GHz/5GHz WLAN transceivers where duty-cycle-dependent thermal drift must be suppressed. IC Role / Device Role / Timing Role: Temperature-compensated log detector feeding error amplifier to maintain constant peak output despite pulse heating effects. Use Value: Stabilizes EVM and ACLR under pulsed operation by rejecting PA gain drift-no additional thermal sensors or lookup tables needed. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar RF power amplifier controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMV2421LD/NOPB | Single-output version; lacks BS pin and OUT2; identical detector, ramp, and compensation architecture. | Used where only one PA requires closed-loop control (e.g., single-band GSM handset). | Select LMV2421LD/NOPB when dual-PA functionality is unnecessary-reduces pin count and simplifies layout. |
| MAX2016ETE+ | 30dB detection range (vs. 50dB); integrated temperature sensor; different pinout and compensation method (no COMP1/COMP2). | Targeted at lower-dynamic-range applications like WiMAX or narrowband IoT; not GPRS-compliant. | Choose MAX2016ETE+ only if 30dB range suffices and external RC loop tuning is undesirable-requires redesign of compensation network. |
Compared with LMV242LD/NOPB, LMV2421LD/NOPB offers identical precision and temperature stability but halves output capability, while MAX2016ETE+ trades detection range and GSM timing compliance for integrated diagnostics-making LMV242LD/NOPB optimal for dual-PA, multi-band mobile transmitters demanding full 50dB control and GPRS burst fidelity.
Availability
LMV242LD/NOPB is available at Aetrix Electronics and suitable for GSM/GPRS mobile phone transmitters, dual-band PA modules, TD-SCDMA baseband designs, and pulse RF control systems requiring stable component supply and long-term lifecycle support.
Supply support for LMV242LD/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 solutions for industrial, automotive, and communications markets.
The LMV242LD/NOPB belongs to TI's RF power detector and PA controller product line, engineered specifically for accurate, temperature-stable closed-loop transmit power control in multi-standard mobile handsets and wireless infrastructure.
FAQ
What is the function of the BS pin on the LMV242LD/NOPB?
The BS (Band Select) pin is a Schmitt-triggered digital input that determines which output channel is active: when BS = high, OUT1 is enabled and OUT2 is pulled low; when BS = low, OUT2 is enabled and OUT1 is pulled low. This allows the LMV242LD/NOPB to control two separate power amplifiers-such as GSM and DCS bands-in a single IC without external multiplexing. The BS signal also routes the internal compensation network (COMP2) to the selected output path, preserving loop stability for each PA.
How does the LMV242LD/NOPB achieve GPRS-compliant transmit timing?
The LMV242LD/NOPB achieves GPRS-compliant timing through sub-6μs turn-on from shutdown (TON), programmable ramp response via external RC compensation on COMP1/COMP2, and tight synchronization between TX_EN, VRAMP, and RF burst edges. Its internal ramp filter and error amplifier architecture allow the closed-loop system to settle within ≤28μs-meeting GPRS Class 12 time-mask requirements. The device's 50dB log detector ensures accurate power tracking across the full dynamic range, critical for maintaining ACLR and EVM during burst transitions.
Can the LMV242LD/NOPB be used with InGaP HBT and GaAs PAs?
Yes, the LMV242LD/NOPB is explicitly designed to support InGaP HBT, GaAs MESFET, SiGe, and bipolar PAs. Its output drivers provide sufficient sourcing/sinking current (up to 31.5mA) and rail-to-rail swing (±105mV) to interface directly with common VAPC inputs. The datasheet confirms compatibility with single-supply PAs and includes application examples for InGaP HBT implementations. No level-shifting or buffering is required-enabling direct connection to the PA gain-control pin.
What is the purpose of the COMP1 and COMP2 pins on the LMV242LD/NOPB?
COMP1 and COMP2 form the external compensation network for the closed-loop PA control system. An RC network (e.g., 68pF capacitor and 0Ω resistor) connects COMP1 to COMP2, creating an integrator node that sets loop bandwidth and phase margin. COMP2 is switched by the BS pin to route compensation to either OUT1 or OUT2. This configuration enables stable, tunable control loops for each PA-critical for meeting GSM time-mask specifications and avoiding overshoot or ringing during RF bursts.
Does the LMV242LD/NOPB include temperature compensation for its RF detector?
Yes, the LMV242LD/NOPB integrates accurate temperature compensation into its logarithmic RF detector circuitry. Over the full operating range (−40°C to +85°C), log conformance error remains within ±1.5dB at 900MHz, 1800MHz, 1900MHz, and 2000MHz-verified across multiple production lots. This eliminates the need for system-level temperature calibration or lookup tables, simplifying firmware and improving long-term power accuracy in mobile handsets exposed to ambient thermal cycling.
LMV242LD/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 10-WFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- RF Type:
- Cellular, GSM, GPRS, TDMA, TD-SCDMA, WLL
- Frequency:
- 450MHz ~ 2GHz
- Features:
- Dual Output, Quad Band
- Supplier Device Package:
- 10-WSON (3x3)
LMV242LD/NOPB FAQ
1.How can I place an order for LMV242LD/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMV242LD/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 LMV242LD/NOPB reliable?
The price and inventory of LMV242LD/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMV242LD/NOPB is usually 5 days.
3.What payment methods are accepted for LMV242LD/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMV242LD/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMV242LD/NOPB?
LMV242LD/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMV242LD/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 LMV242LD/NOPB?
For technical support, including LMV242LD/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMV242LD/NOPB requirements.
6.How does Aetrix verify that LMV242LD/NOPB is sourced from the original manufacturer or authorized distributors?
All LMV242LD/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 LMV242LD/NOPB meets industry standards.
7.What is the process for return or replacement of LMV242LD/NOPB?
All LMV242LD/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMV242LD/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 LMV242LD/NOPB part is unused and in its original packaging.
Return procedure for LMV242LD/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LMV242LD/NOPB Tags
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AD8311ACBZ-P7
Analog Devices Inc.
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LMV242LD/NOPB
Texas Instruments
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MAX4473EUA+
Analog Devices Inc./Maxim Integrated
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MAX4473EUA
Analog Devices Inc./Maxim Integrated
-
MAX4473EUA-T
Analog Devices Inc./Maxim Integrated
-
AD8316ACP-REEL
Analog Devices Inc.
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ADP3403ARU-REEL
Analog Devices Inc.
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AD8316ARM-REEL7
Analog Devices Inc.
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AD8315ACP-REEL7
Analog Devices Inc.
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AD8315ARM-REEL7
Analog Devices Inc.
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AD8316ACP-REEL7
Analog Devices Inc.
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AD8316ARM
Analog Devices Inc.
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