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Texas Instruments LME49724MR/NOPB
- Part No.:
- LME49724MR/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-PowerSOIC (0.154", 3.90mm Width)
- Datasheet:
-
LME49724MR/NOPB.pdf
- Description:
- IC AUDIO 1 CIRCUIT 8SOPWRPAD
- Quantity:
- Payment:
- Shipping:
Inventory:2,830
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Product details
Overview
LME49724MR/NOPB from Texas Instruments is a fully-differential audio operational amplifier optimized for ultra-high-fidelity signal amplification. It delivers 2.1nV/√Hz input noise density, 0.00003% THD+N at 1kHz, ±18V/μs slew rate, and drives 600Ω loads to 52VP-P on ±15V supplies-enabling use in professional line drivers and ADC front-ends.
For engineers reviewing the LME49724MR/NOPB datasheet, LME49724MR/NOPB pinout, LME49724MR/NOPB application, or LME49724MR/NOPB equivalent, key selection considerations include differential output swing capability, VOCM-controlled common-mode setting, enable functionality for power management, and stability with capacitive loads up to 100pF.
Technical Context
The LME49724MR/NOPB implements a fully-differential architecture with integrated VOCM input for precise DC-level control of both outputs. Its dual-output stage supports true differential signaling with matched gain paths and high CMRR (102dB typ) to reject common-mode interference in balanced audio paths.
It features an enable pin that reduces quiescent current to <0.3mA when pulled to VEE, and operates across ±2.5V to ±18V supplies while maintaining low input bias current (60nA typ) and high open-loop gain (125dB typ) into 600Ω loads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| THD+N | 0.00003% (typ) at 1kHz - enables transparent audio reproduction without audible harmonic artifacts |
| Slew Rate | ±18V/μs (typ) - preserves transient fidelity in wideband audio signals up to 20kHz+ |
| Input Noise Density | 2.1nV/√Hz (typ) - ensures minimal contribution to system noise floor in low-level preamp stages |
| CMRR / PSRR | 102dB / 125dB (typ) - rejects supply ripple and common-mode interference critical in mixed-signal PCB layouts |
| Output Swing | 52VP-P into 600Ω on ±15V - drives professional balanced line interfaces without clipping |
| Gain Bandwidth | 50MHz (typ) - supports stable closed-loop operation at unity gain and higher with complex loads |
| Supply Range | ±2.5V to ±18V - accommodates portable battery-powered and studio-grade ±15V systems |
Pinout & Package
The LME49724MR/NOPB is housed in an 8-pin SO PowerPad (DDA0008B) package with exposed thermal pad. The PowerPad must be soldered to a PCB copper plane connected to VEE or electrically isolated for optimal thermal performance (θJA = 49.6°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: VIN− | Inverting input | Differential input node; referenced to VOCM for common-mode rejection |
| 2: VOCM | Common-mode voltage reference | Sets DC level of both outputs; 50kΩ input impedance allows external biasing or ADC reference routing |
| 3: VCC | Positive supply | Accepts ±2.5V to ±18V; requires local 10μF + 0.1μF bypassing for low THD |
| 4: VOUT+ | Non-inverting output | Complementary to VOUT−; forms differential pair delivering doubled dynamic range |
| 5: VOUT− | Inverting output | Phase-inverted copy of VOUT+; enables even-harmonic cancellation in balanced transmission |
| 6: VEE | Negative supply / ground | Reference for ENABLE threshold and PowerPad connection; supports single-supply operation down to 5V total |
| 7: ENABLE | Active-high enable | Active above VEE + 2.35V; reduces ICCQ to <0.3mA when tied to VEE for standby mode |
| 8: VIN+ | Non-inverting input | Differential input node; matched to VIN− for high CMRR and low DC error |
Key Features
| Feature | Design Value |
|---|---|
| Fully-differential output architecture | Delivers 6dB higher dynamic range vs. single-ended amps and suppresses even-order harmonics |
| VOCM-controlled common-mode output | Enables precise DC bias alignment with ADC reference voltages or downstream differential receivers |
| Capacitive load drive up to 100pF | Maintains stability without external compensation-critical for cable driver and ADC interface applications |
| Output short-circuit protection | Withstands continuous fault conditions while limiting IOUT to ±80mA-enhances system robustness |
| Enable pin with low-power standby | Reduces quiescent current to <0.3mA, supporting power-gated audio subsystems in portable gear |
Applications
| Professional Audio Line Drivers | High-Fidelity ADC Front-Ends |
|---|---|
Use Scenario: Driving long balanced XLR cables in recording consoles and digital audio workstations. IC Role / Device Role / Timing Role: Fully-differential line driver converting single-ended DAC output to balanced analog signal. Use Value: 52VP-P swing into 600Ω and 102dB CMRR ensure immunity to EMI and preserve SNR over cable runs. | Use Scenario: Conditioning analog sensor or microphone signals prior to sampling by high-resolution ADCs. IC Role / Device Role / Timing Role: Differential driver matching ADC input common-mode range and rejecting supply noise. Use Value: VOCM pin accepts ADC reference voltage to align output DC level; 0.00003% THD+N prevents distortion masking low-level signals. |
| Ultra-High-End Preamplifiers | Active Crossover Networks |
Use Scenario: Low-noise gain stage in phono or microphone preamps where residual distortion must be imperceptible. IC Role / Device Role / Timing Role: Ultra-low-noise, low-THD differential amplifier in first gain block of analog signal chain. Use Value: 2.1nV/√Hz input noise and 0.00003% THD+N meet demanding RIAA playback and studio monitoring specs. | Use Scenario: Splitting full-range audio into band-limited signals for multi-driver loudspeaker systems. IC Role / Device Role / Timing Role: High-linearity active filter section implementing steep-slope crossover functions. Use Value: 50MHz GBWP and ±18V/μs slew rate support accurate phase-matched filtering up to 20kHz without group delay distortion. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fully-differential audio amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM4562MAX/NOPB | Single-ended output, lower slew rate (±13.5V/μs), no VOCM or ENABLE pin | Requires external differential conversion circuitry; less suitable for direct ADC driving or power-gated systems | Choose when cost-sensitive designs require high-performance single-ended op-amp behavior without differential complexity |
| OPA1632DR | Higher THD+N (0.00006% typ), lower PSRR (105dB typ), no enable function | Lacks integrated standby mode; VOCM pin not available-requires external bias network for differential output centering | Prefer when board space constraints favor smaller SO-8 footprint and VOCM flexibility is not required |
Compared with LM4562MAX/NOPB and OPA1632DR, the LME49724MR/NOPB uniquely integrates VOCM control, enable functionality, and superior THD+N (0.00003%)-making it the only option among the three qualified for direct-coupled, low-power, fully-differential ADC driver and professional line driver roles.
Availability
LME49724MR/NOPB is available at Aetrix Electronics and suitable for professional audio line drivers, high-fidelity ADC front-ends, and ultra-low-distortion preamplifiers requiring stable component supply across extended production lifecycles.
Supply support for LME49724MR/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 signal conditioning.
The LME49724MR/NOPB belongs to TI's LME audio op-amp family, engineered specifically for ultra-low-distortion, high-slew-rate fully-differential amplification in premium audio equipment and precision data acquisition systems.
FAQ
What is the maximum capacitive load the LME49724MR/NOPB can drive without instability?
The LME49724MR/NOPB is specified to drive capacitive loads up to 100pF while maintaining stability and minimal overshoot (<5%). For cable or ADC input capacitance exceeding 100pF, a series resistor (typically 10–47Ω) must be added at each output to isolate the load and preserve phase margin. This requirement is confirmed in the "Driving a Capacitive Load" section of the SNAS438A datasheet.
How does the VOCM pin function in the LME49724MR/NOPB, and what is its input impedance?
The VOCM pin on the LME49724MR/NOPB sets the DC common-mode voltage of both differential outputs. It has a 50kΩ input impedance and can be driven externally (e.g., by an ADC reference) or left floating to default to the midpoint of VCC and VEE via internal resistors. Per the datasheet, VOCM must be bypassed with a 0.1–1μF capacitor to ground for optimal PSRR, especially at low audio frequencies.
Does the LME49724MR/NOPB support single-supply operation, and what is the minimum total supply voltage?
Yes, the LME49724MR/NOPB supports true single-supply operation with a total supply voltage ranging from 5V to 36V (e.g., 0V to +5V or 0V to +36V). In this mode, VEE is connected to ground, and the VOCM pin determines output common-mode level. The device maintains full AC performance-including 0.00003% THD+N and ±18V/μs slew rate-as verified under ±2.5V to ±18V split-supply conditions.
What is the purpose of the ENABLE pin on the LME49724MR/NOPB, and what voltage thresholds activate it?
The ENABLE pin on the LME49724MR/NOPB controls power-down mode: it activates the amplifier when pulled above VEE + 2.35V (typ), and disables it-reducing quiescent current to <0.3mA-when pulled ≤ VEE + 1.75V (typ). The pin must never float; for split-supply operation, tie to ground (active) or VEE (standby); for single-supply, tie to VCC (active) or ground (standby).
Can the LME49724MR/NOPB be used as a single-ended-to-differential converter, and what is the recommended configuration?
Yes-the LME49724MR/NOPB is explicitly validated for single-ended-to-differential conversion per Figure 51 in SNAS438A. The recommended configuration applies the input signal to VIN+ while grounding VIN− (or using matched resistive feedback), with VOCM set to the desired output common-mode level. This achieves high-fidelity conversion with >100dB CMRR and preserves the amplifier's 0.00003% THD+N performance.
LME49724MR/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-PowerSOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Amplifier Type:
- Audio
- Number of Circuits:
- 1
- Output Type:
- Differential
- Slew Rate:
- 18V/µs
- Gain Bandwidth Product:
- 50 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 60 nA
- Voltage - Input Offset:
- 200 µV
- Current - Supply:
- 10mA
- Current - Output / Channel:
- 80 mA
- Voltage - Supply Span (Min):
- 5 V
- Voltage - Supply Span (Max):
- 36 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SO PowerPad
LME49724MR/NOPB FAQ
1.How can I place an order for LME49724MR/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LME49724MR/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 LME49724MR/NOPB reliable?
The price and inventory of LME49724MR/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LME49724MR/NOPB is usually 5 days.
3.What payment methods are accepted for LME49724MR/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LME49724MR/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LME49724MR/NOPB?
LME49724MR/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LME49724MR/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 LME49724MR/NOPB?
For technical support, including LME49724MR/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LME49724MR/NOPB requirements.
6.How does Aetrix verify that LME49724MR/NOPB is sourced from the original manufacturer or authorized distributors?
All LME49724MR/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 LME49724MR/NOPB meets industry standards.
7.What is the process for return or replacement of LME49724MR/NOPB?
All LME49724MR/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LME49724MR/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 LME49724MR/NOPB part is unused and in its original packaging.
Return procedure for LME49724MR/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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