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Texas Instruments LME49721MA/NOPB
- Part No.:
- LME49721MA/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LME49721MA/NOPB.pdf
- Description:
- IC AUDIO 2 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:5,338
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Product details
Overview
LME49721MA/NOPB from Texas Instruments is a dual-channel, rail-to-rail input/output audio operational amplifier optimized for ultra-low distortion and high-fidelity signal amplification. It delivers 0.00008% THD+N (RL = 2kΩ), 4nV/√Hz input noise density, ±8.5V/μs slew rate, and operates from 2.2V to 5.5V single supply - enabling precision analog front-ends in portable and professional audio systems.
For engineers reviewing the LME49721MA/NOPB datasheet, LME49721MA/NOPB pinout, LME49721MA/NOPB application, or LME49721MA/NOPB equivalent, key selection criteria include its 118dB open-loop gain, 40fA input bias current, rail-to-rail output swing within 10mV of supplies, unity-gain stability, and guaranteed performance across –40°C to +85°C.
Technical Context
The LME49721MA/NOPB employs a proprietary bipolar-input, CMOS-output architecture that enables simultaneous rail-to-rail input common-mode range (V– – 0.1V to V+ + 0.1V) and rail-to-rail output swing (within 10mV of either rail at 10kΩ). Its 20MHz gain-bandwidth product and ±8.5V/μs slew rate support wideband audio fidelity without phase distortion or slew-induced IMD.
Designed for low-noise, low-distortion signal chains, it features 103dB PSRR and 93dB CMRR (min) over audio bandwidth, 117dB channel-to-channel isolation, and integrated short-circuit protection. The device maintains 2.15mA quiescent current per amplifier across its full 2.2V–5.5V supply range, enabling efficient dual-supply (±1.1V to ±2.75V) or single-supply operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| THD+N (1kHz, 4VP-P, RL = 2kΩ) | 0.00008% typ - Enables >120dB dynamic range in line-level preamplifiers and DAC I–V stages. |
| Slew Rate | ±8.5V/μs typ - Supports full-swing 20kHz sine wave reproduction without slewing artifacts. |
| Input Noise Density | 4nV/√Hz @ 1kHz - Critical for phono preamp and microphone amplifier front-ends with <1μV input-referred noise. |
| Open-Loop Gain (RL = 600Ω) | 118dB typ - Ensures <0.001% gain error in precision active filters and equalization networks. |
| Input Bias Current | 40fA typ - Minimizes DC offset drift in high-impedance sensor interfaces and passive RIAA networks. |
| Supply Voltage Range | 2.2V to 5.5V single supply - Compatible with Li-ion battery-powered portable audio and USB-powered DACs. |
| Output Swing (RL = 10kΩ) | Within 10mV of each rail - Maximizes usable dynamic range in 3.3V or 5V systems without level-shifting. |
Pinout & Package
Package: 8-pin SOIC (D package), RoHS-compliant, moisture sensitivity level 1, rated for –40°C to +85°C ambient operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - OUTPUTA | Amplifier A output | Low-impedance rail-to-rail voltage source; drives 600Ω loads with ±9.7mA peak current. |
| 2 - NON-INVERTING INPUT A | Amplifier A non-inverting input | High-impedance (1013Ω), 40fA bias current node; supports DC-coupled sensor interfaces. |
| 3 - INVERTING INPUT A | Amplifier A inverting input | Virtual ground node in closed-loop configurations; requires matched trace impedance for balanced noise rejection. |
| 4 - VSS | Negative supply / ground | Reference for dual-supply operation (–1.1V to –2.75V) or ground return in single-supply designs. |
| 5 - INVERTING INPUT B | Amplifier B inverting input | Independent virtual ground node; enables dual-channel instrumentation or stereo signal processing. |
| 6 - OUTPUTB | Amplifier B output | Fully independent output stage; 117dB channel isolation prevents crosstalk in stereo line drivers. |
| 7 - NON-INVERTING INPUT B | Amplifier B non-inverting input | Matched electrical characteristics to Pin 2; supports identical configuration as Channel A. |
| 8 - VDD | Positive supply | Accepts 2.2V–5.5V single supply or +1.1V to +2.75V in dual-supply mode; requires local 0.1μF + 10μF bypassing. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input and output | Enables full utilization of supply voltage in single-supply 3.3V audio systems without level-shifting circuitry. |
| 0.00008% THD+N (2kΩ load) | Meets THX Ultra2 and EBU R68 broadcast-grade distortion requirements for critical monitoring paths. |
| 4nV/√Hz input noise density | Supports 100dB SNR in 20Hz–20kHz bandwidth with 10kΩ source impedance - essential for MM phono stages. |
| Unity-gain stable | Eliminates need for external compensation in buffer, gain-of-1, or active filter configurations. |
| Output short-circuit protection | Prevents latch-up or permanent damage during accidental shorts in line driver or headphone output applications. |
| 117dB channel-to-channel isolation | Maintains stereo imaging integrity in dual-channel applications such as balanced line receivers and panning circuits. |
Applications
| Ultra-High-Quality Portable Audio | High-Fidelity Preamplifiers |
|---|---|
Use Scenario: Battery-powered DAC/headphone amplifier in premium wireless earbuds or portable DAPs. IC Role / Device Role / Timing Role: Dual-channel I–V converter and output buffer driving 16Ω–300Ω headphones. Use Value: 0.0001% THD+N at 600Ω and 4nV/√Hz noise preserve micro-dynamics and tonal accuracy at low volumes. |
Use Scenario: Moving-magnet (MM) phono preamplifier with RIAA equalization in high-end turntable systems. IC Role / Device Role / Timing Role: Low-noise, high-gain transimpedance stage followed by precision active RIAA network. Use Value: 40fA input bias current prevents cartridge loading distortion; 118dB open-loop gain ensures accurate RIAA curve fidelity. |
| State-of-the-Art Phono Pre Amps | High-Performance Line Drivers |
Use Scenario: Dual-mono phono stage with discrete power supplies and ultra-low-noise regulation. IC Role / Device Role / Timing Role: First-stage gain block with passive RIAA network and second-stage buffer. Use Value: 0.00008% THD+N and 20MHz GBW enable flat 20Hz–20kHz response with <0.01dB ripple. |
Use Scenario: Balanced/unbalanced line driver in studio audio interface sending signal to mixer or recorder. IC Role / Device Role / Timing Role: Output driver with 10kΩ load capability and rail-to-rail swing into 600Ω professional gear. Use Value: Output swing within 10mV of rails maximizes headroom; 117dB channel isolation prevents stereo crosstalk. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar audio operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA1612AIDR | Lower input noise (1.1nV/√Hz), higher quiescent current (3.6mA), same SOIC-8 package. | Better suited for ultra-low-noise mic preamps; less optimal for battery-constrained portable audio. | Select OPA1612AIDR when sub-2nV/√Hz noise is mandatory and power budget allows +69% IQ. |
| NE5532DR | Higher THD+N (0.002%), lower GBW (10MHz), wider supply range (±3V to ±20V), no rail-to-rail output. | Legacy industrial audio; unsuitable for 3.3V single-supply or high-fidelity portable designs. | Choose NE5532DR only for cost-sensitive, non-battery-powered equipment where 0.002% THD+N is acceptable. |
Compared with OPA1612AIDR and NE5532DR, the LME49721MA/NOPB uniquely balances ultra-low distortion (0.00008%), rail-to-rail operation at 2.2V–5.5V, and 2.15mA quiescent current - making it the optimal choice for modern portable and high-end analog audio where power efficiency and fidelity are co-prioritized.
Availability
LME49721MA/NOPB is available at Aetrix Electronics and suitable for ultra-high-quality portable audio, high-fidelity preamplifiers, state-of-the-art phono pre amps, and high-performance line drivers requiring stable component supply and long-term production continuity.
Supply support for LME49721MA/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 op amp design and audio signal chain solutions.
The LME49721MA/NOPB belongs to TI's LME audio op amp family, engineered specifically for demanding high-fidelity audio applications where vanishingly low THD+N, ultra-low noise, and rail-to-rail operation are non-negotiable design requirements.
FAQ
What is the maximum output current capability of the LME49721MA/NOPB?
The LME49721MA/NOPB delivers ±9.7mA output current per channel into 250Ω loads at VS = 5.0V, enabling direct drive of 600Ω professional audio lines and low-impedance headphone outputs without external buffers. Short-circuit current is rated at 100mA, and internal protection prevents latch-up during fault conditions.
Does the LME49721MA/NOPB support single-supply operation?
Yes, the LME49721MA/NOPB operates from 2.2V to 5.5V single supply, with rail-to-rail input common-mode range extending from (V– – 0.1V) to (V+ + 0.1V) and output swing within 10mV of both rails under 10kΩ load. This makes it ideal for 3.3V portable audio and USB-powered DAC applications.
What is the typical input offset voltage for the LME49721MA/NOPB?
The LME49721MA/NOPB has a typical input offset voltage of 0.3mV and a maximum of 1.5mV over temperature (–40°C to +85°C). Its average offset drift is 1.1μV/°C, ensuring minimal DC error accumulation in precision active filters and RIAA equalization networks.
Is the LME49721MA/NOPB unity-gain stable?
Yes, the LME49721MA/NOPB is fully unity-gain stable and does not require external compensation capacitors. It maintains phase margin and step response integrity in gain-of-1 buffer, inverting amplifier, and active filter configurations across its full operating temperature and supply range.
What package type is used for the LME49721MA/NOPB?
The LME49721MA/NOPB is supplied in an 8-pin SOIC (D package) with lead finish of matte tin (SN), moisture sensitivity level 1, and RoHS compliance. It is available in tube (95 units) and tape-and-reel (2500 units) packaging formats for both prototyping and high-volume production.
LME49721MA/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:
- Rail-to-Rail
- Slew Rate:
- 8.5V/µs
- Gain Bandwidth Product:
- 20 MHz
- -3db Bandwidth:
- 2.2 MHz
- Current - Input Bias:
- 0.04 pA
- Voltage - Input Offset:
- 300 µV
- Current - Supply:
- 2.15mA (x2 Channels)
- Current - Output / Channel:
- 9.7 mA
- Voltage - Supply Span (Min):
- 2.2 V
- Voltage - Supply Span (Max):
- 5.5 V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
LME49721MA/NOPB FAQ
1.How can I place an order for LME49721MA/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LME49721MA/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 LME49721MA/NOPB reliable?
The price and inventory of LME49721MA/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LME49721MA/NOPB is usually 5 days.
3.What payment methods are accepted for LME49721MA/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LME49721MA/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LME49721MA/NOPB?
LME49721MA/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LME49721MA/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 LME49721MA/NOPB?
For technical support, including LME49721MA/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LME49721MA/NOPB requirements.
6.How does Aetrix verify that LME49721MA/NOPB is sourced from the original manufacturer or authorized distributors?
All LME49721MA/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 LME49721MA/NOPB meets industry standards.
7.What is the process for return or replacement of LME49721MA/NOPB?
All LME49721MA/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LME49721MA/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 LME49721MA/NOPB part is unused and in its original packaging.
Return procedure for LME49721MA/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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