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Texas Instruments LME49726MYX/NOPB
- Part No.:
- LME49726MYX/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
LME49726MYX/NOPB.pdf
- Description:
- IC AUDIO 2 CIRCUIT 8HVSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,265
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Product details
Overview
LME49726MYX/NOPB from Texas Instruments is a dual-channel, rail-to-rail output audio operational amplifier optimized for high-fidelity signal amplification. It delivers 300mA+ output drive at 5V, achieves 0.00008% THD+N (1kHz, 10kΩ load), and features 8.3 nV/√Hz input voltage noise - enabling low-distortion line drivers, DAC I–V gain stages, and active filters in portable and multimedia audio systems.
For engineers reviewing the LME49726MYX/NOPB datasheet, LME49726MYX/NOPB pinout, LME49726MYX/NOPB application, or LME49726MYX/NOPB equivalent, key selection criteria include rail-to-rail swing within 4mV of supply rails, dual-channel isolation (94 dB), and operation across 2.5V–5.5V single-supply or ±1.25V–±2.75V dual-supply configurations.
Technical Context
The LME49726MYX/NOPB employs a CMOS input stage with 0.2 pA bias current and 0.5 mV offset voltage, supporting wide common-mode range (VSS+0.1 V to VDD–1.6 V) and high PSRR (104 dB DC). Its unity-gain-stable architecture provides 6.25 MHz GBWP and ±3.7 V/μs slew rate, enabling accurate reproduction of fast transient audio signals without phase distortion.
Designed for demanding audio loads, it drives 2kΩ to within 4mV of either rail and sustains >160mA output at 2.5V supply. Output short-circuit protection and thermal shutdown ensure robustness in real-world PCB layouts with capacitive loads or split-supply grounding schemes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.5 V to 5.5 V single supply or ±1.25 V to ±2.75 V dual supply - supports battery-powered and line-powered audio designs without level-shifting. |
| THD+N (1kHz, 10kΩ) | 0.00008 % at 3.5VP-P, 5V supply - enables transparent amplification in high-resolution DAC output stages. |
| Input Voltage Noise | 8.3 nV/√Hz at 10 kHz - preserves dynamic range in preamplifier and microphone front-end applications. |
| Slew Rate | ±3.7 V/μs - ensures faithful reproduction of 20 kHz full-scale sine waves without slew-induced distortion. |
| Output Drive Current | 350 mA at 5V into resistive load - directly drives 600Ω professional line outputs or low-Z headphones via external buffers. |
| Channel Isolation | 94 dB at 1 kHz - prevents crosstalk between stereo channels in compact PCB layouts. |
| Open-Loop Gain | 120 dB (100 kΩ load) - maintains precision gain accuracy and low harmonic residue in closed-loop configurations. |
Pinout & Package
HVSSOP-8 (DGN0008A) package with exposed thermal pad (PowerPAD™); 3.0 mm × 3.0 mm footprint, 1.1 mm max height, moisture sensitivity level 1 (260°C reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUTA) | Amplifier A output | Rail-to-rail output capable of sourcing/sinking >300 mA; requires local 0.1 μF bypass capacitor. |
| 2 (–INA) | Inverting input A | High-impedance CMOS node; keep trace length minimal to reduce EMI pickup and parasitic capacitance. |
| 3 (+INA) | Non-inverting input A | DC-biased at VDD/2 in single-supply configs; matched layout critical for common-mode rejection. |
| 4 (V–) | Negative supply / ground | Low-impedance return path; connect directly to solid ground plane under exposed thermal pad. |
| 5 (V+) | Positive supply | Bypass with 10 μF tantalum + 0.1 μF ceramic placed <1 mm from pin; shared with both amplifiers. |
| 6 (+INB) | Non-inverting input B | Independent of Channel A; supports differential or dual-mono signal paths without coupling. |
| 7 (–INB) | Inverting input B | Matched impedance routing recommended when used in balanced configurations (e.g., instrumentation amps). |
| 8 (OUTB) | Amplifier B output | Electrically isolated from OUTA; enables stereo line drivers or active filter dual-path topologies. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output swing | Drives 2kΩ loads to within 4 mV of V+ or V− - maximizes dynamic range in low-voltage portable audio. |
| Ultra-low THD+N | 0.00002 % at 1.5VP-P, 2.5V supply - meets Class A headphone amp performance without discrete biasing. |
| High output current | 350 mA per channel at 5V - eliminates need for external buffer transistors in line driver and crossover networks. |
| Output short-circuit protection | Internally limited current with thermal shutdown - survives accidental shorts during prototyping or field service. |
| VSSOP Exposed-DAP package | Thermal resistance θJA = 72 °C/W - enables 1.2 W dissipation in 25°C ambient without heatsink in compact enclosures. |
Applications
| Portable Audio Amplification | Preamplifiers and Multimedia |
|---|---|
|
Use Scenario: Battery-powered Bluetooth speaker with dual 3W Class D amplifiers requiring clean analog input buffering. IC Role / Device Role / Timing Role: Dual-channel line receiver and gain stage before ADC/DAC conversion and digital signal processing. Use Value: 0.00008% THD+N and 8.3 nV/√Hz noise preserve SNR across 20 Hz–20 kHz bandwidth without audible artifacts. |
Use Scenario: USB-C audio dongle with integrated DAC and analog headphone output. IC Role / Device Role / Timing Role: DAC current-to-voltage converter and headphone driver with rail-to-rail swing. Use Value: 350 mA output drive enables direct connection to 16Ω headphones at 2.5V supply without external MOSFETs. |
| Equalization and Crossover Networks | DAC I–V Converter Gain Stage |
|
Use Scenario: Active 2-way speaker system with digital crossover feeding analog bandpass filters. IC Role / Device Role / Timing Role: High-isolation (94 dB) dual op-amp implementing 2nd-order Butterworth low-pass and high-pass filters. Use Value: 6.25 MHz GBWP and ±3.7 V/μs slew rate maintain phase coherence up to 100 kHz in steep-slope filter designs. |
Use Scenario: High-resolution audio interface with 32-bit DAC requiring ultra-low-noise analog post-processing. IC Role / Device Role / Timing Role: Precision I–V conversion and gain amplification stage immediately following DAC output. Use Value: 0.2 pA input bias current prevents DAC output loading errors; 0.5 mV offset minimizes DC error in DC-coupled paths. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel audio op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA2134UA | Higher 12 nV/√Hz noise, lower 200 mA output drive, no rail-to-rail output (clips 1.5 V from rails) | Less suitable for low-voltage portable line drivers; better for legacy ±15 V studio gear | Select OPA2134UA only if operating at ≥±12 V supplies and noise floor >10 nV/√Hz is acceptable |
| LM4562MF/NOPB | Single-channel, identical noise (8.3 nV/√Hz) and THD+N, but no dual configuration or exposed thermal pad | Requires two devices for stereo; larger board area and higher BOM count than LME49726MYX/NOPB | Choose LM4562MF/NOPB only when strict channel matching is unnecessary or space allows dual SOIC-8 placement |
Compared with OPA2134UA and LM4562MF/NOPB, the LME49726MYX/NOPB uniquely combines dual-channel integration, rail-to-rail swing, 300mA+ drive, and HVSSOP thermal efficiency - making it optimal for space-constrained, battery-operated, and high-fidelity analog signal chains.
Availability
LME49726MYX/NOPB is available at Aetrix Electronics and suitable for portable audio amplification, DAC I–V converter gain stages, and active filter design requiring stable component supply, consistent parametric performance, and long-term industrial availability.
Supply support for LME49726MYX/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 and embedded processing technologies, with over 90 years of innovation in high-performance signal chain solutions.
The LME49726MYX/NOPB belongs to TI's LME audio op-amp family, engineered specifically for ultra-low-noise, low-distortion audio signal conditioning in consumer, professional, and automotive infotainment systems.
FAQ
What is the maximum output current capability of the LME49726MYX/NOPB at 2.5V supply?
The LME49726MYX/NOPB delivers 160 mA per channel at 2.5V supply into resistive loads, as specified in the Electrical Characteristics table (IOUT = 160 mA, VOUT = 2.5V, VDD = 2.5V). This enables direct driving of low-impedance sources in battery-powered audio interfaces without external buffers.
Does the LME49726MYX/NOPB support single-supply operation below 3V?
Yes, the LME49726MYX/NOPB is fully specified for single-supply operation from 2.5V to 5.5V. At 2.5V, it maintains 0.00002% THD+N (1.5VP-P), 94 dB channel isolation, and rail-to-rail output swing - making it suitable for coin-cell or Li-ion powered portable audio devices.
How does the exposed thermal pad on the LME49726MYX/NOPB HVSSOP package affect PCB layout?
The exposed thermal pad (PowerPAD™) must be soldered to a dedicated copper pour connected to V– (pin 4) for optimal thermal performance. TI recommends using 9 vias (minimum) under the pad, each ≥0.3 mm diameter, filled or tented, to achieve θJA = 72 °C/W and sustain 1.2 W dissipation at 25°C ambient.
Can the LME49726MYX/NOPB be used in inverting and non-inverting configurations with equal performance?
Yes - the LME49726MYX/NOPB is unity-gain stable and exhibits identical THD+N, noise, and bandwidth in both inverting and non-inverting modes. Figure 30 (single-supply inverting) and Figure 32 (unity-gain buffer) in the SNAS432C datasheet confirm symmetric AC performance across configurations.
What is the input common-mode voltage range for the LME49726MYX/NOPB at 5V supply?
At 5V supply, the input common-mode voltage range is VSS + 0.1 V to VDD – 1.6 V, i.e., 0.1 V to 3.4 V referenced to ground. This allows operation with inputs biased at VDD/2 (2.5 V) while maintaining >95 dB CMRR and <0.5 mV offset voltage across temperature.
LME49726MYX/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- LME®
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- Audio
- Number of Circuits:
- 2
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 3.7V/µs
- Gain Bandwidth Product:
- 6.25 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 0.2 pA
- Voltage - Input Offset:
- 500 µV
- Current - Supply:
- 700µA (x2 Channels)
- Current - Output / Channel:
- 350 mA
- Voltage - Supply Span (Min):
- 2.5 V
- Voltage - Supply Span (Max):
- 5.5 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-HVSSOP
LME49726MYX/NOPB FAQ
1.How can I place an order for LME49726MYX/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LME49726MYX/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 LME49726MYX/NOPB reliable?
The price and inventory of LME49726MYX/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LME49726MYX/NOPB is usually 5 days.
3.What payment methods are accepted for LME49726MYX/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LME49726MYX/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LME49726MYX/NOPB?
LME49726MYX/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LME49726MYX/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 LME49726MYX/NOPB?
For technical support, including LME49726MYX/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LME49726MYX/NOPB requirements.
6.How does Aetrix verify that LME49726MYX/NOPB is sourced from the original manufacturer or authorized distributors?
All LME49726MYX/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 LME49726MYX/NOPB meets industry standards.
7.What is the process for return or replacement of LME49726MYX/NOPB?
All LME49726MYX/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LME49726MYX/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 LME49726MYX/NOPB part is unused and in its original packaging.
Return procedure for LME49726MYX/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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