LME49713HA/NOPB TI LME49713HA/NOPB High-Performance Audio Op-Amp – Ultra-Low Noise & Distortion
- Ultra-Low Distortion (<0.00003% THD+N)
- Blazing-Fast 1900V/µs Slew Rate
- Low Noise (2.7nV/√Hz) & Wide Bandwidth (132MHz)
TI LME49713HA/NOPB Audio Operational Amplifier – Professional-Grade Sound Fidelity
The LME49713HA/NOPB from Texas Instruments (TI) sets the benchmark for high-fidelity audio amplification, combining ultra-low distortion, exceptional noise performance, and rapid signal response in a robust metal-can package. Designed for audiophiles, studio engineers, and high-end audio designers, this op-amp ensures pristine signal integrity across frequencies—from sub-bass to ultra-high treble.
Whether upgrading a phono preamp, DAC output stage, or headphone amplifier, the LME49713HA/NOPB delivers uncolored, transparent sound with specifications that outperform generic audio ICs.
3 Key Features of the LME49713HA/NOPB
1. Ultra-Low Distortion (<0.00003% THD+N)
- THD+N of just 0.00003% ensures near-perfect signal reproduction, critical for vinyl playback, mastering, and lossless digital audio.
- Outperforms competitors like Burr-Brown OPA1612 in harmonic accuracy.
2. Blazing-Fast 1900V/µs Slew Rate
- Captures transient details (e.g., drum strikes, piano decays) without phase smearing.
- Ideal for high-resolution audio (24-bit/192kHz+) and fast analog signal chains.
3. Low Noise (2.7nV/√Hz) & Wide Bandwidth (132MHz)
- 2.7nV/√Hz input noise eliminates hiss in sensitive applications like MC phono stages.
- Broad 132MHz bandwidth supports ultrasonic filtering and RF-sensitive designs.
Texas Instruments LME49713HA/NOPB – Specifications Summary
| Parameter | Specification |
|---|---|
| Manufacturer | Texas Instruments (TI) |
| Status | Obsolete |
| Amplifier Type | High-Fidelity Audio Op-Amp |
| Package | TO-99-8 Metal Can |
| Supply Voltage Range | ±5V to ±18V (Total: 10V–36V) |
| Single/Dual Supply | Dual-Supply Operation |
| Input Bias Current | 1.8 µA (Typical) |
| Input Offset Voltage | 50 µV (Max) |
| THD+N (1kHz, RL=600Ω) | 0.00003% (Typical) |
| Slew Rate | 1900 V/µs (Typical) |
| Gain Bandwidth Product | 132 MHz (Typical) |
| Noise Density (1kHz) | 2.7 nV/√Hz |
| Output Current | 100 mA per Channel (Max) |
| Operating Temperature | -40°C to +85°C |
| Quiescent Current | 8 mA (Typical, No Load) |
| CMRR | 120 dB (Typical) |
| PSRR | 110 dB (Typical) |
| Unity-Gain Stable | Yes |
| RoHS Compliance | Lead-Free |
Technical Deep Dive
Design Excellence
- Metal Can (TO-99) Package: Provides superior EMI shielding and thermal dissipation vs. plastic DIP/SOIC.
- Stable Operation: Unity-gain stable with ±5V to ±18V dual supplies (10V–36V total).
- High Output Drive: 100mA/channel current for driving low-impedance headphones or transformers.
Comparison to Competing Op-Amps
| Parameter | LME49713HA/NOPB | OPA1612 | NE5532 |
|---|---|---|---|
| THD+N | 0.00003% | 0.000015% | 0.002% |
| Slew Rate | 1900V/µs | 20V/µs | 9V/µs |
| Noise Density | 2.7nV/√Hz | 1.1nV/√Hz | 5nV/√Hz |
| Bandwidth | 132MHz | 40MHz | 10MHz |
LME49713HA/NOPB Applications
High-End Audio Systems
- Phono Preamps: Ultra-low noise critical for moving-coil (MC) cartridges.
- DAC I/V Conversion: Preserves detail in R-2R ladder and delta-sigma outputs.
Professional Equipment
- Mixing Consoles: Transparency for EQ, summing buses, and mic preamps.
- Headphone Amps: Drives 300Ω Sennheiser HD800s effortlessly.
DIY Audiophile Projects
- Replace op-amps in Modi Multibit, Schiit Magni for immediate upgrades.
- Ideal for Open-Source Hardware like WHAMMY headphone amps.
Specifications
| Category | Specification |
|---|---|
| Manufacturer | Texas Instruments |
| Amplifier Type | Audio Operational Amplifier |
| Package | TO-99-8 Metal Can |
| Supply Voltage | ±5V to ±18V (10V–36V total) |
| Input Bias Current | 1.8µA |
| Input Offset Voltage | 50µV (max) |
| Operating Temperature | -40°C to +85°C |
| RoHS Compliance | Yes |
Why Choose the LME49713HA/NOPB?
✅ Reference-Grade Audio: Meets THX, ESS Sabre, and Apogee design standards.
✅ Future-Proof: Supports MQA, DSD512, and Dolby Atmos processing chains.
✅ Reliability: Military-grade temperature range (-40°C to +85°C).
Integration Tips
- Power Supply: Use low-noise regulators (e.g., LT3045) for best performance.
- PCB Layout: Keep traces short, use a ground plane, and decouple with 100nF ceramics + 10µF tantalums.
- Thermal Management: Solder to a copper heatsink for TO-99 stability.
LME49713HA/NOPB Alternatives Comparison
| Part No. | Key Features | Applications | Description |
|---|---|---|---|
| LME49713HA/NOPB (TI) | – Ultra-high slew rate (1900V/µs) – Low THD+N (0.00003%) – TO-99-8 package |
– High-end audio amplifiers – DAC I/V stages – Professional studio gear |
TI’s obsolete ultra-low-distortion op-amp, best for fast transients but no longer produced. |
| OPA1612 (TI) | – Lowest noise (1.1nV/√Hz) – THD+N 0.000015% – Dual-channel – ±2.25V to ±18V |
– DAC I/V stages – Balanced line drivers – ADC buffers |
Best overall replacement—modern, low noise, superior THD+N. Still in production. |
| LME49990 (TI, Obsolete) | – Slew rate 22V/µs – THD+N 0.00001% – Single-channel – Low noise (2.5nV/√Hz) |
– Reference audio circuits – Phono preamps – Filter circuits |
Discontinued but closest TI alternative to LME49713HA. Check distributors for stock. |
| OPA1656 (TI) | – Low power (2mA) – THD+N 0.000025% – Dual-channel – ±2.25V to ±18V |
– Headphone amps – Active filters – Portable audio |
Modern low-power audio op-amp with excellent performance but slightly higher noise. |
| AD797 (Analog Devices) | – Ultra-low noise (0.9nV/√Hz) – FET input (low bias current) – THD+N 0.0001% |
– MC phono preamps – Mic preamps – Instrumentation |
Best-in-class noise performance; ideal for sensitive audio applications. |
| SS3602 (Sparkos Labs) | – Discrete design – High slew rate (50V/µs) – THD+N <0.0001% – Custom sound tuning |
– Audiophile DACs – Tube hybrid amps – High-end preamps |
Premium discrete op-amp for sound customization (higher price). |
Key Takeaways
- OPA1612 is the best modern, in-production alternative for most audio apps.
- AD797 dominates in ultra-low-noise scenarios (e.g., phono stages).
- Sparkos SS3602 is for high-end DIY where cost is secondary to performance.
- Avoid LME49990/LME49713 for new designs due to obsolescence.
Conclusion
For audio purists demanding uncompromised signal fidelity, the TI LME49713HA/NOPB stands as a pinnacle of op-amp engineering. Its ultra-low distortion, rapid slew rate, and noise-neutral signature make it indispensable in high-resolution playback, studio mastering, and bespoke audiophile builds.
Elevate your audio design—order the LME49713HA/NOPB today.
Note: This part is obsolete from TI but available via specialized distributors. Check stock for legacy projects.
Need substitutes? Consider TI’s LME49990 or OPA1656 for similar performance.
Specification: TI LME49713HA/NOPB High-Performance Audio Op-Amp – Ultra-Low Noise & Distortion
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