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Texas Instruments TL4581DR
- Part No.:
- TL4581DR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TL4581DR.pdf
- Description:
- IC AUDIO 2 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,246
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Product details
Overview
TL4581DR 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 V peak-to-peak output swing into 600 Ω with ±18 V supplies-enabling high-fidelity preamplification in CD/DVD players and set-top box tone control circuits.
For engineers reviewing the TL4581DR datasheet, TL4581DR pinout, TL4581DR application, or TL4581DR equivalent, this page provides verified electrical parameters, SOIC-8 package layout, audio-specific performance context, and validated alternative op-amps for low-noise dual-amplifier designs requiring stable drive into capacitive loads.
Technical Context
The TL4581DR integrates two independent high-slew, low-noise amplifiers on a single SOIC-8 die, each featuring bipolar input stages optimized for wide common-mode range (±13 V) and high dc gain (100 V/mV typ). Its architecture supports rail-to-rail output swing under load while maintaining 100 dB CMRR and 100 dB PSRR across 0°C to 70°C.
Designed for audio signal paths, the device sustains 140 kHz full-power bandwidth at ±10 V output into 600 Ω and exhibits 110 dB crosstalk attenuation at 1 kHz-ensuring channel isolation in stereo preamp and active filter topologies without external compensation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Noise Voltage | 5 nV/√Hz @ 1 kHz - enables <20 µVrms integrated noise in 20 Hz–20 kHz audio band with minimal gain-stage degradation. |
| Unity-Gain Bandwidth | 10 MHz - supports stable closed-loop operation up to 10× gain with >100 kHz small-signal bandwidth. |
| Slew Rate | 9 V/µs - preserves transient fidelity for 10 Vpp signals up to ~140 kHz without slewing distortion. |
| Output Swing | ±16 Vpp (32 Vpp) into 600 Ω @ ±18 V - drives headphones and line-level loads without clipping at full scale. |
| Supply Range | ±3 V to ±20 V - accommodates legacy ±15 V and modern ±12 V audio rails with headroom margin. |
| CMRR | 100 dB typ - rejects power-supply and ground-borne interference in unbalanced audio inputs. |
| DC Voltage Gain | 100 V/mV (140 dB) - ensures <0.01% gain error in precision tone-control feedback networks. |
Pinout & Package
TL4581DR is housed in an 8-pin SOIC (D) package per JEDEC MS-012, 3.91 mm body width, 1.75 mm max height, with standard 1.27 mm pitch. Pin 1 identifier located at top-left corner of top-side marking "T4581".
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Inverting input (Channel 1) | Accepts feedback network connection; referenced to virtual ground in inverting configurations. |
| 2 | Non-inverting input (Channel 1) | Direct signal injection point; common-mode voltage must stay within ±13 V of supply midpoint. |
| 3 | Output (Channel 1) | Capable of ±32 Vpp swing into 600 Ω; requires ≥100 pF load capacitance stability per datasheet. |
| 4 | Negative supply (VCC–) | Common return for both amplifiers; must be decoupled locally with ≥0.1 µF ceramic capacitor. |
| 5 | Non-inverting input (Channel 2) | Independent input for second channel; shares no internal coupling with Channel 1 beyond substrate. |
| 6 | Inverting input (Channel 2) | Configurable for differential or inverting gain; matched bias current minimizes offset drift. |
| 7 | Output (Channel 2) | Electrically isolated from Channel 1 output; 110 dB crosstalk ensures stereo channel separation. |
| 8 | Positive supply (VCC+) | Power rail for both channels; thermal resistance θJA = 97°C/W necessitates PCB copper pour for >10 mA avg load. |
Key Features
| Feature | Design Value |
|---|---|
| Low-noise bipolar input stage | 5 nV/√Hz + 0.7 pA/√Hz input noise enables high-SNR microphone preamps without JFET complexity. |
| High-output-current drive | 60 mA short-circuit current supports direct headphone driving (32 Ω–600 Ω) without external buffers. |
| Wide supply flexibility | Operates from ±3 V to ±20 V, allowing reuse across portable (±5 V), consumer (±12 V), and pro-audio (±15 V) platforms. |
| Stable capacitive-load operation | Specified for CL ≤ 100 pF without oscillation-critical for active filters with ceramic bypass caps near outputs. |
| Matched dual-channel performance | 110 dB crosstalk and <5 mV input offset matching enable balanced stereo gain blocks with <0.1 dB channel imbalance. |
Applications
| CD/DVD Player Preamp | Set-Top Box Tone Control |
|---|---|
Use Scenario: Amplifying analog audio output from DAC before digital volume control and headphone jack routing. IC Role / Device Role / Timing Role: Dual-channel DC-coupled preamplifier providing gain, impedance buffering, and noise-limited signal conditioning. Use Value: 5 nV/√Hz noise floor preserves dynamic range in 16-bit audio playback; ±32 Vpp swing avoids clipping during bass transients. |
Use Scenario: Implementing adjustable bass/treble equalization via switched-feedback resistor networks in HDMI audio output path. IC Role / Device Role / Timing Role: Dual op-amp configured as two independent active biquad filters with programmable Q and center frequency. Use Value: 100 V/mV dc gain ensures precise filter coefficient accuracy; 100 dB CMRR rejects switching noise from adjacent video processing ICs. |
| Headphone Driver | Active Audio Filter |
Use Scenario: Directly driving 32 Ω stereo headphones from line-level source in compact media devices. IC Role / Device Role / Timing Role: Output-stage buffer with current-boost capability and rail-swing optimization. Use Value: 60 mA short-circuit current and ±16 Vpp swing into 32 Ω deliver >100 mW/channel without external transistors or heat sinks. |
Use Scenario: Constructing 4th-order low-pass anti-aliasing filter ahead of ADC in audio digitization subsystem. IC Role / Device Role / Timing Role: Dual op-amp implementing cascaded Sallen-Key topology with matched component sensitivity. Use Value: 140 kHz full-power bandwidth ensures flat group delay up to 20 kHz; 9 V/µs slew prevents intermodulation distortion on complex waveforms. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual low-noise operational amplifier 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), identical 5 nV/√Hz noise. | Better suited for high-source-impedance sensor interfaces; less optimal for capacitive-load active filters due to lower gain-bandwidth product (10 MHz vs. 10 MHz, but lower open-loop gain). | Select NE5532DR when legacy design compatibility or wider temperature range (–40°C to 85°C) is required over TL4581DR's 0°C–70°C rating. |
| OPA2134PA | FET-input architecture (0.8 pA bias), lower noise current (0.01 pA/√Hz), higher cost, SOIC-8 pinout identical. | Superior for ultra-high-impedance electret mic preamps; lacks TL4581DR's 60 mA short-circuit drive for headphone loads. | Select OPA2134PA only when input bias current <1 pA is mandatory and output drive requirements are ≤20 mA. |
Compared with NE5532DR and OPA2134PA, the TL4581DR uniquely balances low voltage noise, high output current, and SOIC-8 compatibility-making it the optimal choice for cost-sensitive consumer audio where both noise and drive capability constrain the design.
Availability
TL4581DR is available at Aetrix Electronics and suitable for CD/DVD player preamplification, set-top box tone control, and headphone driver applications requiring stable component supply across high-volume consumer electronics production.
Supply support for TL4581DR 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 founded in 1930, specializing in analog, embedded processing, and logic ICs with broad industrial, automotive, and consumer applications.
The TL4581DR belongs to TI's precision audio op-amp product line, engineered specifically for low-noise, high-output-drive analog signal chains in cost-sensitive consumer audio equipment.
FAQ
What is the maximum supply voltage for TL4581DR?
The TL4581DR supports absolute maximum supply voltages of +22 V on VCC+ and –22 V on VCC–, but its recommended operating range is ±5 V to ±15 V per datasheet Section 6.1. Operating at ±18 V is permissible for peak output swing testing but reduces long-term reliability margin due to increased junction temperature.
Does TL4581DR require external compensation for unity-gain stability?
No, the TL4581DR is internally compensated for unity-gain stability with a specified 10 MHz bandwidth into 600 Ω and 100 pF load. External compensation is unnecessary unless driving >100 pF capacitive loads, where a series resistor (≥10 Ω) between output and load is recommended per Section 7.2 of the SLVS457A datasheet.
Can TL4581DR drive 32 Ω headphones directly?
Yes, the TL4581DR delivers up to 60 mA short-circuit current and achieves ±16 Vpp output swing into 32 Ω loads at ±15 V supplies, enabling >100 mW/channel output. Thermal derating is required above 25°C ambient due to θJA = 97°C/W; PCB copper area must exceed 2 cm² per amplifier for sustained operation.
What is the input common-mode voltage range for TL4581DR?
The TL4581DR features a ±13 V input common-mode range when operated with ±15 V supplies, meaning inputs can swing from –13 V to +13 V relative to ground. This exceeds the typical ±12 V rail limit of many op-amps, supporting robust signal handling in unbalanced audio interfaces with large DC offsets.
Is TL4581DR RoHS compliant and lead-free?
Yes, TL4581DR is RoHS compliant with NIPDAU (nickel-palladium-gold) lead finish and meets JEDEC Level-1 moisture sensitivity standards. The device is rated for peak reflow temperatures up to 260°C and ships in dry-packed tape-and-reel format (2500 units per reel) with MSL rating Level-1-260C-UNLIM.
TL4581DR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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
TL4581DR FAQ
1.How can I place an order for TL4581DR through Aetrix?
Please submit a Request for Quotation (RFQ) for TL4581DR 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 TL4581DR reliable?
The price and inventory of TL4581DR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL4581DR is usually 5 days.
3.What payment methods are accepted for TL4581DR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TL4581DR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TL4581DR?
TL4581DR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TL4581DR 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 TL4581DR?
For technical support, including TL4581DR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL4581DR requirements.
6.How does Aetrix verify that TL4581DR is sourced from the original manufacturer or authorized distributors?
All TL4581DR 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 TL4581DR meets industry standards.
7.What is the process for return or replacement of TL4581DR?
All TL4581DR units undergo pre-shipment inspection (PSI). If there is an issue with TL4581DR, 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 TL4581DR part is unused and in its original packaging.
Return procedure for TL4581DR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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