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Texas Instruments LME49720MAX/NOPB
- Part No.:
- LME49720MAX/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LME49720MAX/NOPB.pdf
- Description:
- IC AUDIO 2 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,620
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Product details
Overview
LME49720MAX/NOPB from Texas Instruments is a dual high-performance, high-fidelity audio operational amplifier optimized for ultra-low distortion and low-noise signal amplification in professional and audiophile-grade systems. It delivers 0.00003% THD+N at 3VRMS, 2.7nV/√Hz input voltage noise, ±20V/μs slew rate, and drives 600Ω loads - making it ideal for phono preamplifiers, line drivers, and active crossover networks.
For engineers reviewing the LME49720MAX/NOPB datasheet, LME49720MAX/NOPB pinout, LME49720MAX/NOPB application, or LME49720MAX/NOPB equivalent, key selection criteria include its dual-channel architecture, ±2.5V to ±17V supply range, SOIC-8 package compatibility, and verified performance in high-PSRR (120dB typ), high-CMRR (120dB typ), and low crosstalk (118dB @ 1kHz) audio signal paths.
Technical Context
The LME49720MAX/NOPB employs a fully differential, bipolar-input topology with matched internal transistor pairs to minimize offset drift and interchannel mismatch. Its design emphasizes wide open-loop gain (140dB typ into 600Ω), high gain-bandwidth product (55MHz), and robust output short-circuit protection - all while maintaining sub-0.1mV input offset voltage and <0.2μV/°C drift over –40°C to +85°C.
It operates with symmetrical dual supplies only (no single-supply mode), supports rail-to-rail input common-mode range (±13.9V min), and features internally compensated stability for unity-gain and higher closed-loop configurations without external compensation components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| THD+N | 0.00003% typ at 1kHz, 3VRMS, 2kΩ load - enables transparent audio reproduction with vanishingly low harmonic artifacts |
| Input Noise Density | 2.7nV/√Hz typ at 1kHz - preserves signal integrity in low-level analog stages like phono or microphone preamps |
| Slew Rate | ±20V/μs typ - supports full-swing transient response up to 200kHz without slewing-induced distortion |
| Gain Bandwidth Product | 55MHz typ - ensures stable, high-fidelity amplification even at high closed-loop gains (e.g., >40dB) |
| PSRR / CMRR | 120dB typ each - rejects power supply ripple and common-mode interference critical in mixed-signal audio PCBs |
| Output Current | ±26mA typ into 600Ω - directly drives professional line-level interfaces and active filter loads without buffers |
| Supply Voltage Range | ±2.5V to ±17V - accommodates both low-voltage portable designs and high-headroom studio equipment |
Pinout & Package
Package: SOIC-8 (NOM: 4.90mm × 3.91mm), RoHS-compliant, surface-mount, plastic body with gull-wing leads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT A) | Output A | Amplified signal output for Channel A; capable of ±13.6V swing into 600Ω |
| 2 (IN– A) | Inverting Input A | Negative input terminal for Channel A; high-impedance (30kΩ diff, 1MΩ cm) differential node |
| 3 (IN+ A) | Non-Inverting Input A | Positive input terminal for Channel A; matched to Pin 2 for optimal CMRR |
| 4 (V–) | Negative Supply | DC return path for negative rail; must be decoupled locally with ≥10μF ceramic + 100nF film capacitor |
| 5 (IN+ B) | Non-Inverting Input B | Positive input terminal for Channel B; electrically isolated but thermally coupled to Channel A |
| 6 (IN– B) | Inverting Input B | Negative input terminal for Channel B; maintains channel-to-channel isolation >118dB @ 1kHz |
| 7 (OUT B) | Output B | Amplified signal output for Channel B; independent output stage with short-circuit protection |
| 8 (V+) | Positive Supply | DC return path for positive rail; requires symmetric decoupling to V– for optimal PSRR |
Key Features
| Feature | Design Value |
|---|---|
| Dual-channel matched performance | Guaranteed interchannel gain matching ≤0.01dB and offset tracking <0.5μV/°C for stereo imaging fidelity |
| Ultra-low THD+N | 0.00003% typ enables resolution of micro-dynamic detail in high-resolution DAC output stages |
| High output drive capability | ±26mA into 600Ω eliminates need for external output buffers in pro-audio line driver applications |
| Robust thermal design | RθJA = 107.9°C/W (SOIC) supports continuous operation at full output in compact enclosures |
| Integrated short-circuit protection | Self-limiting current foldback prevents latch-up or damage during accidental output shorts |
Applications
| Phono Preamplifier | Professional Line Driver |
|---|---|
Use Scenario: RIAA-equalized amplification of moving-magnet cartridge signals (typically 5mV–50mV, 47kΩ source). IC Role / Device Role / Timing Role: First-stage low-noise, high-gain (40–60dB) transimpedance and equalization amplifier. Use Value: 2.7nV/√Hz input noise and 0.00003% THD+N preserve vinyl groove detail without adding hiss or harmonic coloration. | Use Scenario: Balanced/unbalanced line-level signal distribution to multiple destinations (e.g., recording console, monitor controller, effects loop). IC Role / Device Role / Timing Role: High-current, low-distortion output buffer with DC-coupled signal path. Use Value: ±26mA drive into 600Ω ensures full 24dBu headroom and minimal crosstalk (<–118dB) between left/right channels. |
| Active Crossover Network | High-Fidelity Equalizer |
Use Scenario: Frequency-selective splitting of full-range audio into band-limited signals for multi-way loudspeaker systems. IC Role / Device Role / Timing Role: Precision op-amp in 2nd/4th-order Sallen-Key or state-variable filter topologies. Use Value: 55MHz GBWP and ±20V/μs slew rate maintain phase coherence and transient accuracy across 20Hz–20kHz passbands. | Use Scenario: Parametric or graphic EQ section in mastering-grade analog processors or digital-analog hybrid workstations. IC Role / Device Role / Timing Role: Low-drift, low-noise gain cell in feedback-based peaking/notch filter sections. Use Value: <0.1mV input offset and 0.2μV/°C drift prevent DC buildup in cascaded EQ stages; 140dB open-loop gain ensures precise Q and center-frequency control. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual high-fidelity audio operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA2134PA | Lower slew rate (20V/μs vs. 20V/μs same), higher THD+N (0.00008% vs. 0.00003%), 10nV/√Hz noise vs. 2.7nV/√Hz | Less suitable for ultra-low-noise phono or high-slew-rate active filters; preferred where cost sensitivity outweighs ultimate fidelity | Select OPA2134PA when budget constraints dominate and 10dB lower noise margin is acceptable |
| AD827JRZ | Higher input bias current (1.2μA vs. 10nA), lower PSRR (100dB vs. 120dB), no integrated short-circuit protection | Not recommended for high-impedance sources (e.g., MM cartridges); requires external protection circuitry in demanding environments | Choose AD827JRZ only for legacy designs where pinout compatibility is mandatory and noise/PSRR trade-offs are validated |
Compared with OPA2134PA and AD827JRZ, the LME49720MAX/NOPB provides superior noise performance, tighter distortion specs, and built-in protection - making it the preferred choice for new high-end audio designs where signal purity and reliability are non-negotiable.
Availability
LME49720MAX/NOPB is available at Aetrix Electronics and suitable for ultra-high-fidelity audio amplification, professional line driving, and high-performance active filtering requiring stable component supply and long-term manufacturability.
Supply support for LME49720MAX/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 technologies with over 90 years of innovation in precision analog design.
The LME49720MAX/NOPB belongs to TI's LME audio op-amp family, engineered specifically for ultra-low distortion, low-noise, high-slew-rate applications in premium consumer, professional, and studio audio equipment.
FAQ
What is the maximum output voltage swing of the LME49720MAX/NOPB into a 600Ω load?
The LME49720MAX/NOPB delivers ±12.5V minimum and ±13.6V typical output voltage swing into a 600Ω load at ±15V supplies. This is confirmed in Section 7.5 Electrical Characteristics of the SNAS393D datasheet under "VOUTMAX" with test conditions VS = ±15V, RL = 600Ω. The device maintains this performance across its full operating temperature range (–40°C to +85°C), supporting high-headroom audio signal paths without clipping.
Does the LME49720MAX/NOPB support single-supply operation?
No, the LME49720MAX/NOPB does not support true single-supply operation. It requires dual symmetrical supplies (±2.5V to ±17V) and is specified only for split-rail use. Its input common-mode range extends to within 2V of each rail (e.g., –13.9V to +14.1V at ±15V), but it lacks rail-to-rail input or output capability and has no internal level-shifting circuitry. Using it with a single supply would violate absolute maximum ratings and result in undefined behavior or damage.
How does the LME49720MAX/NOPB achieve its 0.00003% THD+N specification?
The LME49720MAX/NOPB achieves 0.00003% THD+N through a combination of advanced bipolar process technology, precision laser-trimmed internal resistor matching, and a fully differential output stage that cancels even-order harmonics. This is measured at AV = 1, VOUT = 3VRMS, fIN = 1kHz, RL = 2kΩ or 600Ω per the SNAS393D datasheet. The architecture minimizes crossover distortion and thermal EMF effects, enabling this performance across its full specified supply and temperature range - not just at nominal conditions.
What thermal considerations apply to the LME49720MAX/NOPB in SOIC-8 package?
The LME49720MAX/NOPB in SOIC-8 (D package) has a junction-to-ambient thermal resistance (RθJA) of 107.9°C/W per the SNAS393D datasheet. To maintain safe operation below the 150°C max junction temperature, PCB layout must include ≥2cm² of 2-oz copper pour connected to Pins 4 (V–) and 8 (V+) for heat spreading, plus thermal vias to inner ground planes. Power dissipation should be limited to ≤350mW under continuous full-output conditions, especially in enclosed or high-ambient environments.
Is the LME49720MAX/NOPB pin-compatible with other devices in the LME497xx family?
Yes, the LME49720MAX/NOPB is pin-compatible with the LME49710 (single-channel) and LME49721 (dual-channel, higher output current) in SOIC-8, PDIP-8, and TO-99 packages - all share identical pin 1–8 assignments per the "Pin Functions" table in SNAS393D. However, electrical differences (e.g., LME49721's 100mA output vs. LME49720MAX/NOPB's 26mA) mean direct substitution requires verification of load requirements and thermal margins in the target application.
LME49720MAX/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- LME®
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- 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 (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
LME49720MAX/NOPB FAQ
1.How can I place an order for LME49720MAX/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LME49720MAX/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 LME49720MAX/NOPB reliable?
The price and inventory of LME49720MAX/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LME49720MAX/NOPB is usually 5 days.
3.What payment methods are accepted for LME49720MAX/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LME49720MAX/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LME49720MAX/NOPB?
LME49720MAX/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LME49720MAX/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 LME49720MAX/NOPB?
For technical support, including LME49720MAX/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LME49720MAX/NOPB requirements.
6.How does Aetrix verify that LME49720MAX/NOPB is sourced from the original manufacturer or authorized distributors?
All LME49720MAX/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 LME49720MAX/NOPB meets industry standards.
7.What is the process for return or replacement of LME49720MAX/NOPB?
All LME49720MAX/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LME49720MAX/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 LME49720MAX/NOPB part is unused and in its original packaging.
Return procedure for LME49720MAX/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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