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Texas Instruments LME49720NA/NOPB
- Part No.:
- LME49720NA/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
LME49720NA/NOPB.pdf
- Description:
- IC AUDIO 2 CIRCUIT 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,041
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Product details
Overview
LME49720NA/NOPB from Texas Instruments is a dual high-fidelity audio operational amplifier optimized for ultra-low distortion and low-noise signal amplification in professional and consumer audio systems. It delivers 0.00003% THD+N at 3VRMS, 2.7nV/√Hz input noise density, ±20V/μs slew rate, and drives 600Ω loads - making it ideal for phono preamplifiers, line drivers, and active filters.
For engineers reviewing the LME49720NA/NOPB datasheet, LME49720NA/NOPB pinout, LME49720NA/NOPB application, or LME49720NA/NOPB equivalent, key selection criteria include verified THD+N performance at 600Ω, channel-to-channel isolation >112dB, PSRR/CMRR >120dB, rail-to-rail output swing capability, and SOIC-8 package compatibility with high-density PCB layouts.
Technical Context
The LME49720NA/NOPB employs a proprietary bipolar input stage with advanced process optimization to achieve vanishingly low voltage noise and distortion across audio bandwidths. Its fully differential dual-channel architecture maintains >112dB channel-to-channel isolation up to 20kHz while supporting independent gain configurations per channel.
Designed for split-supply operation (±2.5V to ±17V), the device features short-circuit protected outputs, robust thermal design (RθJA = 107.9°C/W in SOIC-8), and stable unity-gain operation without external compensation - enabling direct integration into RIAA equalization networks and active crossover topologies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| THD+N | 0.00003% typ at 1kHz, 3VRMS, 2kΩ load - enables transparent signal reproduction in critical listening paths |
| Input Noise Density | 2.7nV/√Hz at 1kHz - preserves dynamic range in low-level microphone and phono-stage applications |
| Slew Rate | ±20V/μs typ - supports full-swing transient response up to 20kHz without slew-induced distortion |
| Gain Bandwidth Product | 55MHz typ - ensures stable closed-loop operation with ≥20dB gain margin at 20kHz |
| PSRR / CMRR | >120dB typ - rejects power supply ripple and common-mode interference in noisy system environments |
| Output Drive | ±26mA max into 600Ω - directly interfaces with professional audio equipment I/O standards |
| Supply Range | ±2.5V to ±17V - accommodates both portable battery-powered and high-voltage studio-grade designs |
Pinout & Package
Package: SOIC-8 (N) - 4.90mm × 3.91mm body, surface-mount, RoHS-compliant, tape-and-reel packaging.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Output A | Amplified signal output for Channel A; capable of ±13.6V swing into 600Ω |
| 2 | Inverting Input A | Inverting audio input node for Channel A; matched impedance for balanced feedback networks |
| 3 | Non-Inverting Input A | Non-inverting audio input node for Channel A; high common-mode impedance (1000MΩ) |
| 4 | V− | Negative supply rail connection; must be decoupled with ≥10μF low-ESR capacitor |
| 5 | Non-Inverting Input B | Non-inverting audio input node for Channel B; electrically isolated from Channel A |
| 6 | Inverting Input B | Inverting audio input node for Channel B; supports independent gain configuration |
| 7 | Output B | Amplified signal output for Channel B; identical AC/DC specs to Output A |
| 8 | V+ | Positive supply rail connection; requires local 100nF ceramic + 10μF bulk decoupling |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low THD+N | 0.00003% at 1kHz enables audibly transparent amplification in mastering-grade signal chains |
| High Channel Isolation | >112dB at 20kHz prevents crosstalk between stereo channels in dual-mono architectures |
| 600Ω Load Drive | ±26mA output current supports direct interface with professional line-level equipment |
| Short-Circuit Protection | Internally limits output current during fault conditions without latch-up or parameter shift |
| Thermal Stability | 150°C max junction temperature rating with defined RθJA allows predictable thermal design in compact enclosures |
Applications
| Phono Preamplifier | Studio Line Driver |
|---|---|
Use Scenario: RIAA-equalized amplification of moving-magnet cartridge signals requiring precise 20dB/decade bass boost and 40dB high-frequency attenuation. IC Role / Device Role / Timing Role: Dual-channel precision op-amp implementing passive RIAA network with active gain compensation. Use Value: 2.7nV/√Hz input noise ensures sub-1μVRMS integrated noise floor over 20Hz–20kHz, preserving vinyl source detail. | Use Scenario: Balanced/unbalanced line-level signal distribution from DAC or mixer outputs to multiple destinations (monitor controllers, recorders, effects units). IC Role / Device Role / Timing Role: High-output-current buffer amplifier maintaining signal integrity across long cable runs and reactive loads. Use Value: ±20V/μs slew rate and 0.00003% THD+N prevent transient intermodulation and harmonic smearing at full-scale 2VRMS output. |
| Active Crossover Network | High-Fidelity Equalizer |
Use Scenario: Frequency-selective splitting of full-range audio into band-limited signals for multi-driver loudspeaker systems using 2nd/4th-order Linkwitz-Riley topologies. IC Role / Device Role / Timing Role: Dual-channel op-amp implementing low-sensitivity Sallen-Key or state-variable filter sections with minimal phase error. Use Value: 55MHz GBWP provides ≥30dB open-loop gain at 20kHz, ensuring accurate filter Q and cutoff stability across temperature. | Use Scenario: Parametric or graphic EQ section in digital/analog hybrid mixing consoles or standalone tone-shaping units targeting audiophile-grade response accuracy. IC Role / Device Role / Timing Role: Low-noise, low-distortion gain cell in feedback-based peaking/notch filter stages with adjustable center frequency and bandwidth. Use Value: >120dB PSRR/CMRR rejects ground-bounce and supply ripple artifacts that would modulate EQ gain accuracy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual audio op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LME49720MA/NOPB | Same electrical specs; TO-99 metal can package with superior thermal resistance (RθJC = 35°C/W) but through-hole mounting | Better suited for discrete high-power analog stages where thermal mass and EMI shielding are prioritized over board space | Select when thermal management or RF immunity outweighs surface-mount assembly requirements |
| OPA1612AIDR | Lower input bias current (1.3pA vs 10nA), higher GBWP (50MHz vs 55MHz), slightly higher THD+N (0.00005% vs 0.00003%) | Preferred in DC-coupled sensor front-ends or ultra-low-input-current applications; less optimal for high-swing 600Ω drive | Choose for ultra-high-impedance sources or when lower quiescent current (2.6mA vs 12mA) is critical |
Compared with LME49720MA/NOPB and OPA1612AIDR, the LME49720NA/NOPB uniquely balances 600Ω drive capability, industry-leading THD+N, and SOIC-8 manufacturability - making it the preferred choice for cost-sensitive, high-density, high-fidelity audio PCBs requiring proven 20kHz transient fidelity.
Availability
LME49720NA/NOPB is available at Aetrix Electronics and suitable for ultra-high-fidelity audio amplification, professional line drivers, and active filter designs requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for LME49720NA/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 decades of leadership in high-performance audio IC design.
The LME49720NA/NOPB belongs to TI's LME audio op-amp family - engineered specifically for ultra-low-distortion, low-noise, high-slew-rate signal conditioning in premium audio equipment, from studio monitors to high-end consumer DACs and headphone amplifiers.
FAQ
What is the maximum output voltage swing of the LME49720NA/NOPB into a 600Ω load?
The LME49720NA/NOPB delivers ±13.6V maximum output voltage swing into a 600Ω load at ±17V supplies, as specified in the Electrical Characteristics table (VOUTMAX). This corresponds to 19.2VPP or ~6.8VRMS, sufficient for professional line-level (+24dBu) signal transmission without clipping under typical operating conditions. The LME49720NA/NOPB maintains this performance across its full operating temperature range (–40°C to +85°C).
Does the LME49720NA/NOPB require external compensation for unity-gain stability?
No, the LME49720NA/NOPB is internally compensated for stable operation at unity gain (AV = 1) with capacitive loads up to 100pF, as confirmed by the datasheet's "Typical Characteristics" section (Figure 73 shows phase margin >60° at G = 1). This eliminates the need for external compensation components in standard inverting/non-inverting configurations, simplifying layout and reducing bill-of-materials cost. The LME49720NA/NOPB remains stable even with moderate PCB trace capacitance.
How does the LME49720NA/NOPB compare to the LME49710 in terms of channel count and noise performance?
The LME49720NA/NOPB is a dual-channel device with 2.7nV/√Hz input voltage noise density, while the LME49710 is single-channel with 2.5nV/√Hz - a 0.2nV/√Hz advantage. However, the LME49720NA/NOPB maintains identical THD+N (0.00003%), slew rate (±20V/μs), and GBWP (55MHz) per channel. The LME49720NA/NOPB is optimized for stereo or dual-path applications where space and matching matter more than absolute minimum noise.
Is the LME49720NA/NOPB pin-compatible with other SOIC-8 op-amps like the NE5532?
No, the LME49720NA/NOPB is not pin-compatible with the NE5532 or other legacy SOIC-8 op-amps. Its pinout follows TI's standard dual-op-amp configuration (V+, Out A, In+ A, V−, In+ B, In− B, Out B, In− A), whereas NE5532 uses V−, In− A, In+ A, Out A, Out B, In+ B, In− B, V+. Swapping them requires PCB redesign. The LME49720NA/NOPB pinout is shared across the LME497xx family, including LME49720MA/NOPB and LME49721, ensuring layout reuse within TI's audio portfolio.
What thermal considerations apply to the LME49720NA/NOPB in SOIC-8 packaging?
The LME49720NA/NOPB in SOIC-8 (N package) has a junction-to-ambient thermal resistance (RθJA) of 107.9°C/W, meaning a 12mA quiescent current at ±15V (360mW total dissipation) raises junction temperature by ~39°C above ambient. To maintain TJ ≤125°C, ambient must stay ≤86°C with no airflow - underscoring the need for adequate copper pour, thermal vias, and spacing from heat sources. The LME49720NA/NOPB thermal data is validated per JEDEC JESD51 standards.
LME49720NA/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- LME®
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Active
- Amplifier Type:
- Audio
- Number of Circuits:
- 2
- Output Type:
- -
- Slew Rate:
- 20V/µs
- Gain Bandwidth Product:
- 55 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 10 nA
- Voltage - Input Offset:
- 100 µV
- Current - Supply:
- 10mA (x2 Channels)
- Current - Output / Channel:
- 26 mA
- Voltage - Supply Span (Min):
- 5 V
- Voltage - Supply Span (Max):
- 34 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
LME49720NA/NOPB FAQ
1.How can I place an order for LME49720NA/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LME49720NA/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 LME49720NA/NOPB reliable?
The price and inventory of LME49720NA/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LME49720NA/NOPB is usually 5 days.
3.What payment methods are accepted for LME49720NA/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LME49720NA/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LME49720NA/NOPB?
LME49720NA/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LME49720NA/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 LME49720NA/NOPB?
For technical support, including LME49720NA/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LME49720NA/NOPB requirements.
6.How does Aetrix verify that LME49720NA/NOPB is sourced from the original manufacturer or authorized distributors?
All LME49720NA/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 LME49720NA/NOPB meets industry standards.
7.What is the process for return or replacement of LME49720NA/NOPB?
All LME49720NA/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LME49720NA/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 LME49720NA/NOPB part is unused and in its original packaging.
Return procedure for LME49720NA/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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