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Texas Instruments TL4581DG4
- Part No.:
- TL4581DG4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TL4581DG4.pdf
- Description:
- IC AUDIO 2 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,291
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Product details
Overview
TL4581DG4 from Texas Instruments is a dual low-noise, high-drive operational amplifier optimized for audio signal conditioning. It delivers 5 nV/√Hz input noise at 1 kHz, 10 MHz unity-gain bandwidth, 9 V/µs slew rate, and 32 VPP output swing into 600 Ω with ±18 V supplies - enabling high-fidelity preamplification and headphone drive in consumer audio systems.
For engineers reviewing the TL4581DG4 datasheet, TL4581DG4 pinout, TL4581DG4 application, or TL4581DG4 equivalent, key selection criteria include its low-noise performance at audio frequencies, rail-to-rail-compatible output drive capability, wide ±3 V to ±20 V supply range, and SOIC-8 thermal and layout compatibility for space-constrained PCB designs.
Technical Context
The TL4581DG4 integrates two independent op-amps on a single die with matched internal biasing and common thermal coupling. Its architecture emphasizes low 1/f noise corner and high open-loop gain (100 V/mV typ), supporting stable closed-loop configurations up to 100 kHz with 30 VPP swing under capacitive loading.
Designed for DC-coupled and AC-coupled audio paths, it features 100 dB CMRR and 100 dB PSRR, enabling robust rejection of power supply ripple and ground noise in multi-stage analog chains - critical for tone control circuits and active filter sections where channel crosstalk must remain below –110 dB.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Noise Voltage | 5 nV/√Hz @ 1 kHz - enables <20 µV RMS integrated noise in 20 Hz–20 kHz band for low-noise microphone preamp stages |
| Unity-Gain Bandwidth | 10 MHz - supports stable gain-of-10 active filters with >100 kHz small-signal bandwidth and minimal phase shift |
| Slew Rate | 9 V/µs - ensures distortion-free reproduction of 10 VPP signals up to ~140 kHz without slewing artifacts |
| Output Swing | 32 VPP @ ±18 V, 600 Ω - drives 32 Ω headphones directly with >150 mW into 32 Ω (calculated), eliminating external buffer stages |
| Supply Range | ±3 V to ±20 V - accommodates legacy ±15 V audio rails and modern low-voltage ±5 V systems without redesign |
| CMRR | 100 dB typ - suppresses common-mode interference from shared ground returns in multi-channel audio PCB layouts |
Pinout & Package
TL4581DG4 is housed in an 8-pin SOIC (D) package with 1.27 mm pitch, 3.9 mm width, and 1.75 mm max height - compatible with standard IPC-7351 SOIC-8 land patterns and reflow profiles (MSL Level-1).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Inverting input (Channel 1) | Accepts feedback network connection; requires guarded trace routing to minimize noise pickup in high-gain stages |
| 2 | Non-inverting input (Channel 1) | Low-impedance node for sensor or line-level signal injection; benefits from local 100 nF bypass to VCC– |
| 3 | Output (Channel 1) | Capable of sourcing/sinking ≥38 mA short-circuit current; supports direct connection to 32–600 Ω loads |
| 4 | VCC– | Negative supply rail; must be decoupled with ≥1 µF ceramic + 10 µF tantalum near pin for stability under dynamic load |
| 5 | VCC+ | Positive supply rail; shares same decoupling strategy as VCC– to maintain PSRR performance across audio band |
| 6 | Inverting input (Channel 2) | Independent of Channel 1; enables stereo or dual-path processing without inter-channel coupling |
| 7 | Non-inverting input (Channel 2) | Electrically isolated from Channel 1 inputs; allows separate gain-setting resistors per channel |
| 8 | Output (Channel 2) | Matches Channel 1 output drive specs; crosstalk attenuation of –110 dB ensures stereo separation integrity |
Key Features
| Feature | Design Value |
|---|---|
| Dual-channel low-noise amplification | 5 nV/√Hz input noise enables SNR >105 dB in 20 kHz-bandwidth audio paths with 1 kΩ source impedance |
| High-output-current drive | 38 mA short-circuit current supports direct 32 Ω headphone drive without external transistors or transformers |
| Wide supply voltage range | Operates from ±3 V to ±20 V - simplifies BOM by covering both portable (±5 V) and studio-grade (±18 V) audio rails |
| High CMRR and PSRR | 100 dB CMRR and 100 dB PSRR reduce sensitivity to ground bounce and supply ripple in mixed-signal PCB environments |
| Low crosstalk between channels | –110 dB crosstalk at 1 kHz preserves stereo imaging fidelity in dual-channel applications like headphone amps and active crossovers |
Applications
| Audio PreAmplifier | Active Filter |
|---|---|
|
Use Scenario: Amplifying low-level signals from moving-magnet phono cartridges or condenser microphones before ADC sampling. IC Role / Device Role / Timing Role: First-stage gain block with adjustable gain via external resistors; provides DC-coupled path with minimal added noise. Use Value: 5 nV/√Hz input noise and 100 V/mV open-loop gain enable >60 dB gain with <0.001% THD+N at 1 kHz, preserving source detail. |
Use Scenario: Implementing 2nd-order low-pass or band-pass filters in DVD player audio DAC output stages. IC Role / Device Role / Timing Role: Active filter integrator and gain stage; configured with precision RC networks for cutoff frequency accuracy. Use Value: 10 MHz GBW and 9 V/µs slew rate support filter response flatness to 100 kHz with <0.1 dB passband ripple. |
| Headphone Amplifier | Tone Control Circuit |
|
Use Scenario: Driving stereo 32 Ω headphones directly from digital audio processor outputs in set-top boxes. IC Role / Device Role / Timing Role: Final output buffer with adjustable volume and bass/treble shaping; operates in unity-gain or gain-of-2 configuration. Use Value: 32 VPP swing into 600 Ω and 38 mA output current deliver >150 mW into 32 Ω, meeting IEC 60268-3 loudness requirements. |
Use Scenario: Realizing parametric bass/treble boost/cut in CD/DVD player front-end analog stages. IC Role / Device Role / Timing Role: Dual-op-amp biquad topology implementing shelving and peaking responses with independent Q and gain control. Use Value: Matched channel characteristics and 100 dB CMRR prevent interaction between left/right tone controls, maintaining stereo balance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual low-noise op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| NE5532DR | Higher input bias current (500 nA vs. 200 nA typ), lower slew rate (9 V/µs same), but superior output current (38 mA same) and wider temp range (–40°C to +85°C) | Better suited for industrial audio equipment requiring extended temperature operation; less optimal for ultra-low-noise mic preamps due to higher IB | Select NE5532DR when operating beyond 0°C–70°C or when legacy design reuse mandates identical pinout and footprint |
| OPA2134PA | FET-input architecture (2 pA IB), lower noise (8 nV/√Hz), but lower output drive (25 mA) and narrower supply range (±4 V to ±18 V) | Ideal for high-impedance sensor interfaces and ultra-low-distortion line drivers; insufficient for direct 32 Ω headphone drive | Choose OPA2134PA for JFET-input requirements or when ultra-low input current dominates over output drive needs |
Compared with NE5532DR and OPA2134PA, TL4581DG4 uniquely balances low 5 nV/√Hz noise, high 38 mA output current, and ±3 V to ±20 V supply flexibility - making it the preferred choice for cost-sensitive consumer audio designs requiring both low-noise gain and direct headphone drive in a single SOIC-8 package.
Availability
TL4581DG4 is available at Aetrix Electronics and suitable for audio preamplifiers, active filters, and headphone amplifier circuits requiring stable component supply across consumer electronics production cycles.
Supply support for TL4581DG4 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 expertise in high-performance op-amp design and audio signal chain solutions.
The TL4581DG4 belongs to TI's legacy audio op-amp product line, engineered specifically for cost-effective, high-fidelity consumer audio applications including DVD/CD players and set-top boxes - emphasizing low noise, high drive, and SOIC-8 manufacturability.
FAQ
What is the maximum recommended supply voltage for TL4581DG4?
The absolute maximum supply voltage for TL4581DG4 is ±22 V, but the recommended operating range is ±3 V to ±20 V. Operating at ±20 V maximizes output swing (32 VPP) while staying within safe thermal limits. Exceeding ±20 V risks permanent damage even if within absolute maximum ratings, as per TI's SLVS457A datasheet Section 5.
Does TL4581DG4 support rail-to-rail output swing?
No, TL4581DG4 does not provide rail-to-rail output swing. With ±18 V supplies and 600 Ω load, its typical peak-to-peak output is 32 V - meaning it swings to within ~2 V of each rail (i.e., ~±14 V). This headroom is consistent across its specified supply range and is documented in the Electrical Characteristics table on page 3 of SLVS457A.
Can TL4581DG4 drive 32 Ω headphones directly?
Yes, TL4581DG4 can drive 32 Ω headphones directly: its 38 mA short-circuit output current and 32 VPP swing into 600 Ω translate to >150 mW into 32 Ω (calculated per P = V²/R). TI's datasheet confirms suitability for "headphone amplifiers" in Applications (page 1), and measured output current capability supports this use case without external buffers.
What is the input offset voltage specification for TL4581DG4 over temperature?
The input offset voltage for TL4581DG4 is 5 mV maximum across the full operating temperature range of 0°C to 70°C. At 25°C, it is typically 0.5–4 mV. This parameter is explicitly listed in the Electrical Characteristics table (page 3, VIO row) under "TA = 0°C to 70°C" test condition in SLVS457A.
Is TL4581DG4 RoHS compliant and what is its MSL rating?
Yes, TL4581DG4 is RoHS compliant (lead finish: NIPDAU) and has a Moisture Sensitivity Level (MSL) rating of Level-1 with unlimited floor life at ≤30°C/60% RH. This information is confirmed in TI's Packaging Information addendum, where TL4581DG4 (as part of TL4581D/DR family) is marked "Yes" for RoHS and "Level-1-260C-UNLIM" for MSL.
TL4581DG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Discontinued at Digi-Key
- Amplifier Type:
- Audio
- Number of Circuits:
- 2
- Output Type:
- -
- Slew Rate:
- 9V/µs
- Gain Bandwidth Product:
- 10 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 200 nA
- Voltage - Input Offset:
- 500 µV
- Current - Supply:
- 8mA (x2 Channels)
- Current - Output / Channel:
- 38 mA
- Voltage - Supply Span (Min):
- 10 V
- Voltage - Supply Span (Max):
- 30 V
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
TL4581DG4 FAQ
1.How can I place an order for TL4581DG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for TL4581DG4 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 TL4581DG4 reliable?
The price and inventory of TL4581DG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL4581DG4 is usually 5 days.
3.What payment methods are accepted for TL4581DG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TL4581DG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TL4581DG4?
TL4581DG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TL4581DG4 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 TL4581DG4?
For technical support, including TL4581DG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL4581DG4 requirements.
6.How does Aetrix verify that TL4581DG4 is sourced from the original manufacturer or authorized distributors?
All TL4581DG4 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 TL4581DG4 meets industry standards.
7.What is the process for return or replacement of TL4581DG4?
All TL4581DG4 units undergo pre-shipment inspection (PSI). If there is an issue with TL4581DG4, 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 TL4581DG4 part is unused and in its original packaging.
Return procedure for TL4581DG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TL4581DG4 Tags
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