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Texas Instruments LME49723MA/NOPB
- Part No.:
- LME49723MA/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LME49723MA/NOPB.pdf
- Description:
- IC AUDIO 2 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:845
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Product details
Overview
LME49723MA/NOPB from Texas Instruments is a dual high-fidelity audio operational amplifier optimized for ultra-low distortion, low noise, and high slew rate performance in precision analog signal paths. It delivers 0.0002% THD+N at 1 kHz, 3.6 nV/√Hz input noise density, ±8 V/μs slew rate, and drives 600 Ω loads to within 1.4 V of either rail - enabling use in phono preamplifiers, RIAA equalization, and professional line drivers.
For engineers reviewing the LME49723MA/NOPB datasheet, LME49723MA/NOPB pinout, LME49723MA/NOPB application, or LME49723MA/NOPB equivalent, key selection criteria include verified THD+N performance at 600 Ω, channel-to-channel isolation >112 dB, PSRR/CMRR ≥100 dB, output short-circuit protection, and SOIC-8 package compatibility with audio-grade PCB layout practices.
Technical Context
The LME49723MA/NOPB employs a proprietary bipolar input stage with advanced process optimization to achieve vanishingly low voltage noise (3.6 nV/√Hz) and distortion (0.0002% THD+N), while maintaining unity-gain stability and ±20 V/μs small-signal slew capability. Its input stage sustains low bias current (200 nA typ) and high common-mode rejection (100 dB) across ±2.5 V to ±17 V supplies.
Output stage design enables rail-to-rail swing within 1.4 V at 600 Ω and 1 V at 2 kΩ, with ±26 mA output current capability and built-in short-circuit protection. Channel-to-channel isolation exceeds 112 dB at 20 kHz, ensuring minimal crosstalk in stereo and multi-channel audio systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| THD+N | 0.0002% typ at 1 kHz, 3 VRMS, RL = 600 Ω - enables transparent amplification in high-end phono and line stages without audible harmonic contamination |
| Input Noise Density | 3.6 nV/√Hz typ at 1 kHz - supports >120 dB A-weighted SNR in low-level signal chains like microphone and phono preamps |
| Slew Rate | ±8 V/μs typ - preserves transient fidelity in wideband audio signals up to 20 kHz without slew-induced distortion |
| PSRR / CMRR | ≥100 dB typ - rejects power supply ripple and common-mode interference critical in mixed-signal audio PCBs |
| Supply Range | ±2.5 V to ±17 V - accommodates both low-voltage portable designs and high-headroom studio equipment |
| Open-Loop Gain | 105 dB typ at RL = 600 Ω - ensures precise closed-loop gain accuracy and low distortion under real-world loading |
| Channel Isolation | 112 dB at 20 kHz - prevents inter-channel leakage in stereo DAC outputs, balanced receivers, and active crossovers |
Pinout & Package
The LME49723MA/NOPB is housed in an 8-pin narrow-body SOIC package (Package Code D0008A), 3.9 mm × 4.9 mm footprint, 1.75 mm max height, RoHS-compliant matte tin lead finish, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Output A | Amplified output of Channel A; capable of ±26 mA drive into 600 Ω with <1.4 V headroom from rails |
| 2 | Inverting Input A | High-impedance differential input node for Channel A; requires matched trace routing to minimize imbalance |
| 3 | Non-Inverting Input A | High-impedance differential input node for Channel A; referenced to ground or bias network per application |
| 4 | V− | Negative supply rail connection; must be decoupled locally with low-ESR ceramic capacitor |
| 5 | Non-Inverting Input B | High-impedance differential input node for Channel B; electrically isolated from Channel A inputs |
| 6 | Inverting Input B | High-impedance differential input node for Channel B; maintains >112 dB channel-to-channel isolation |
| 7 | Output B | Amplified output of Channel B; identical drive capability and distortion performance as Pin 1 |
| 8 | V+ | Positive supply rail connection; requires local 100 nF ceramic + 10 μF tantalum decoupling |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low THD+N | 0.0002% at 1 kHz, 3 VRMS, 600 Ω load - eliminates audible coloration in critical gain stages |
| Low input voltage noise | 3.6 nV/√Hz - preserves dynamic range in low-output transducers (e.g., moving-magnet cartridges) |
| Rail-swing output stage | Drives 600 Ω to within 1.4 V of rails - maximizes usable output voltage swing without clipping |
| High PSRR/CMRR | ≥100 dB - suppresses ground bounce and supply coupling in shared-power audio subsystems |
| Output short-circuit protection | Internally limited continuous short-circuit current - prevents latch-up or thermal failure during fault conditions |
Applications
| Phono Preamplifier | Professional Line Driver |
|---|---|
Use Scenario: Amplifying low-level RIAA-equalized signals from moving-magnet phonograph cartridges (typically 5 mV output). IC Role / Device Role / Timing Role: Dual-channel precision op-amp providing 40 dB gain with passive RIAA network; Channel A handles left, Channel B handles right. Use Value: 0.0002% THD+N and 3.6 nV/√Hz noise ensure no added distortion or hiss, preserving vinyl source integrity. | Use Scenario: Driving long balanced/unbalanced audio cables (up to 100 m) from DAC or mixer outputs to power amplifiers. IC Role / Device Role / Timing Role: High-current output buffer with low output impedance (<0.01 Ω) and high slew rate for fast transient delivery. Use Value: ±26 mA drive capability and 112 dB channel isolation prevent crosstalk and maintain signal integrity over cable capacitance. |
| Active Crossover Network | High-Fidelity Equalizer |
Use Scenario: Splitting full-range audio into band-limited signals for multi-way loudspeaker systems using 2nd-order Butterworth filters. IC Role / Device Role / Timing Role: Dual op-amp implementing simultaneous low-pass and high-pass filter sections with matched component tolerance. Use Value: 105 dB open-loop gain and 17 MHz GBW ensure accurate filter response shape and phase coherence between channels. | Use Scenario: Implementing parametric or graphic EQ in studio monitors or digital audio workstations with analog summing stages. IC Role / Device Role / Timing Role: Dual op-amp serving as gain-control element in feedback topology with precision resistor networks. Use Value: 0.3 mV input offset and <0.2 µV/°C drift prevent DC walking in cascaded filter stages, ensuring stable frequency response. |
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 |
|---|---|---|---|
| OPA2134PA | Higher input bias current (1 pA vs 200 nA), lower slew rate (20 V/μs vs ±8 V/μs), 8 nV/√Hz noise | Less suitable for low-impedance 600 Ω line driving; better for FET-input high-Z sensor interfaces | Select OPA2134PA only when ultra-low input current is prioritized over THD+N and drive strength |
| NE5532DR | Higher THD+N (0.002% vs 0.0002%), higher noise (5 nV/√Hz), no guaranteed 600 Ω drive spec | Acceptable for cost-sensitive consumer audio but not for reference-grade phono or mastering applications | Choose NE5532DR where budget constraints outweigh fidelity requirements; verify layout for stability |
Compared with OPA2134PA and NE5532DR, the LME49723MA/NOPB provides superior distortion performance and proven 600 Ω drive capability - making it the preferred choice for high-resolution phono preamps, studio line drivers, and active crossover networks demanding sub-0.001% THD+N.
Availability
LME49723MA/NOPB is available at Aetrix Electronics and suitable for high-fidelity phono preamplifiers, professional line drivers, and active audio crossovers requiring stable component supply, consistent electrical binning, and long-term manufacturability assurance.
Supply support for LME49723MA/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 delivering analog and embedded processing solutions with emphasis on precision, reliability, and signal-chain integrity.
The LME49723MA/NOPB belongs to TI's LME audio op-amp family, engineered specifically for ultra-high-fidelity analog audio signal conditioning - targeting applications where vanishingly low THD+N, ultra-low noise, and robust output drive are non-negotiable.
FAQ
What is the maximum load capacitance the LME49723MA/NOPB can drive without external compensation?
The LME49723MA/NOPB is specified to drive capacitive loads up to 100 pF with minimal phase shift or overshoot. Beyond this value, a series resistor (typically 10–47 Ω) must be added between the output and load to maintain stability. This requirement is explicitly confirmed in the TI datasheet Section "APPLICATION INFORMATION" and validated in Figure 45's power bandwidth characterization.
Does the LME49723MA/NOPB support single-supply operation?
No - the LME49723MA/NOPB is designed exclusively for split-supply operation across ±2.5 V to ±17 V. Its input common-mode range extends to within 2.0 V of each rail, and output swing is specified relative to symmetric supplies. Single-supply configurations require level-shifting circuitry and are not characterized or guaranteed by TI.
What is the thermal resistance (θJA) of the LME49723MA/NOPB in SOIC-8 package?
The junction-to-ambient thermal resistance (θJA) for the LME49723MA/NOPB in its SOIC-8 (D0008A) package is 145 °C/W, as specified in the Absolute Maximum Ratings table of the SNAS429B datasheet. This value assumes standard JEDEC 2-layer board conditions; actual thermal performance improves with copper pour and thermal vias.
How does the LME49723MA/NOPB compare to the LME49710 in terms of key audio specifications?
The LME49723MA/NOPB is the dual-channel variant of the LME49710 single op-amp. Both share identical THD+N (0.0002%), input noise (3.6 nV/√Hz), slew rate (±8 V/μs), and PSRR/CMRR (≥100 dB). The LME49723MA/NOPB adds matched channel performance and 112 dB channel isolation - critical for stereo applications - while maintaining the same SOIC-8 footprint as the LME49710's SOIC-8 version.
Is the LME49723MA/NOPB pin-compatible with industry-standard dual op-amps like the NE5532?
No - the LME49723MA/NOPB uses a standard SOIC-8 pinout (V+, In−B, In+B, V−, In+A, In−A, OutA, OutB), which differs from the NE5532's pinout (OutA, In−A, In+A, V−, V+, OutB, In−B, In+B). Direct replacement requires PCB layout modification. TI does not claim pin compatibility with NE5532 or other legacy dual op-amps.
LME49723MA/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- LME®
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Amplifier Type:
- Audio
- Number of Circuits:
- 2
- Output Type:
- -
- Slew Rate:
- 8V/µs
- Gain Bandwidth Product:
- 19 MHz
- -3db Bandwidth:
- 4 MHz
- Current - Input Bias:
- 200 nA
- Voltage - Input Offset:
- 300 µV
- Current - Supply:
- 6.7mA (x2 Channels)
- Current - Output / Channel:
- 25 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
LME49723MA/NOPB FAQ
1.How can I place an order for LME49723MA/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LME49723MA/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 LME49723MA/NOPB reliable?
The price and inventory of LME49723MA/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LME49723MA/NOPB is usually 5 days.
3.What payment methods are accepted for LME49723MA/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LME49723MA/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LME49723MA/NOPB?
LME49723MA/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LME49723MA/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 LME49723MA/NOPB?
For technical support, including LME49723MA/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LME49723MA/NOPB requirements.
6.How does Aetrix verify that LME49723MA/NOPB is sourced from the original manufacturer or authorized distributors?
All LME49723MA/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 LME49723MA/NOPB meets industry standards.
7.What is the process for return or replacement of LME49723MA/NOPB?
All LME49723MA/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LME49723MA/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 LME49723MA/NOPB part is unused and in its original packaging.
Return procedure for LME49723MA/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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