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Texas Instruments OPA4134UA/2K5G4
- Part No.:
- OPA4134UA/2K5G4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
OPA4134UA/2K5G4.pdf
- Description:
- IC AUDIO 4 CIRCUIT 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,135
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Product details
Overview
OPA4134UA/2K5G4 from Texas Instruments is a quad-channel, FET-input audio operational amplifier optimized for high-fidelity signal conditioning in professional and multimedia audio systems. It delivers ultra-low THD+N (0.00008% at 1kHz), low input voltage noise (8nV/√Hz), 8MHz gain bandwidth, ±2.5V to ±18V dual-supply operation, and rail-to-rail output swing within 1.5V of rails under 2kΩ load.
For engineers reviewing the OPA4134UA/2K5G4 datasheet, OPA4134UA/2K5G4 pinout, OPA4134UA/2K5G4 application, or OPA4134UA/2K5G4 equivalent, this page provides verified specifications, SOIC-14 package details, channel-isolated architecture implications, headroom performance at ±18V, and validated alternatives for audio line driver, preamplifier, and active filter designs.
Technical Context
The OPA4134UA/2K5G4 implements a true JFET-input stage with 5pA typical input bias current and cascoded common-mode rejection circuitry, enabling stable operation over ±2.5V to ±18V supplies while maintaining <0.00015% THD+N into 600Ω. Its unity-gain stability, 20V/µs slew rate, and 128dB channel separation at DC ensure minimal crosstalk and distortion in multichannel audio routing.
Each of the four independent amplifiers features identical electrical characteristics-including 120dB open-loop gain (2kΩ), 1.2µVrms integrated input-referred noise (20Hz–20kHz), and output drive capability up to ±36mA sourcing-making it suitable for simultaneous use in stereo pair + subwoofer crossover or multi-band equalizer topologies without interaction.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| THD+N | 0.00008% at 1kHz, 3Vrms, 2kΩ load - enables transparent signal reproduction in mastering-grade analog paths |
| Input Voltage Noise | 8nV/√Hz at 1kHz - preserves dynamic range in low-level microphone and phono preamp stages |
| Gain Bandwidth | 8MHz - supports stable unity-gain and high-gain configurations up to 20kHz with margin |
| Slew Rate | 20V/µs - prevents slew-induced distortion on fast transients in digital audio reconstruction filters |
| Supply Range | ±2.5V to ±18V - accommodates both portable battery-powered and studio-grade ±15V power rails |
| Output Swing | (V+) – 1.5V / (V–) + 1.2V into 2kΩ - delivers 21.3dBu headroom at ±18V, critical for peak transient handling |
| Channel Separation | 128dB at DC, 126dB at 20kHz into 2kΩ - ensures isolated left/right/center/surround signal integrity in quad audio systems |
Pinout & Package
OPA4134UA/2K5G4 is housed in a 14-pin SOIC (Small Outline Integrated Circuit) surface-mount package with standard JEDEC MS-012AC footprint and 1.27mm pitch. Thermal resistance is RθJA = 97°C/W, supporting continuous operation at +85°C ambient when properly heatsinked.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 7, 8, 14 | OUT A/B/C/D | Independent buffered outputs per channel; each capable of ±36mA sourcing and ±30mA sinking |
| 2, 6, 9, 13 | –IN A/B/C/D | Inverting inputs; virtual ground nodes in standard configurations, minimizing common-mode distortion sensitivity |
| 3, 5, 10, 12 | +IN A/B/C/D | Noninverting inputs; JFET-based with 5pA bias current, requiring impedance matching >2kΩ to avoid distortion rise |
| 4 | V+ | Positive supply rail connection; must be bypassed with ≥10nF ceramic capacitor to ground for PSRR optimization |
| 11 | V– | Negative supply rail connection; shares same bypassing requirement as V+ to maintain CMRR and noise immunity |
Key Features
| Feature | Design Value |
|---|---|
| No phase reversal | Operates safely with inputs driven 10V beyond supply rails-eliminates latch-up risk in voltage-follower line receivers |
| True FET input | 5pA max input bias current enables high-impedance sensor interfacing and passive filter integration without loading error |
| Low-noise dual contribution | 8nV/√Hz voltage noise + 3fA/√Hz current noise optimizes SNR across source impedances from 10Ω to 10MΩ |
| Rail-swing output | Delivers full 30Vpp output at ±18V supply-maximizes dynamic range in analog-to-digital converter front-ends |
| Unity-gain stable | Requires no external compensation; supports direct use in buffers, integrators, and active filters without stability tuning |
Applications
| Professional Audio Mixing Console | Studio Monitor Preamplifier |
|---|---|
Use Scenario: Quad-channel summing amplifier with discrete gain staging and DC-coupled signal path. IC Role / Device Role / Timing Role: Four independent OPA4134UA/2K5G4 channels implement balanced line drivers for L/R main bus and LFE/subwoofer send, each configured as noninverting amplifier with matched feedback networks. Use Value: 128dB channel separation prevents bleed between main mix and sub send; 0.00008% THD+N preserves harmonic integrity during analog summing. |
Use Scenario: High-headroom, low-noise gain block preceding Class AB power amplifier in active studio monitor. IC Role / Device Role / Timing Role: One OPA4134UA/2K5G4 channel used as DC-coupled inverting preamp (G = −10), others as active crossover filters (LPF/HPF). Use Value: 21.3dBu headroom at ±18V allows clean reproduction of 20Hz–20kHz program material at reference listening levels without clipping. |
| USB Audio Interface Line Output | Active Crossover Network |
Use Scenario: Balanced line driver stage converting DAC output to XLR interface for external powered monitors. IC Role / Device Role / Timing Role: Two OPA4134UA/2K5G4 channels configured as differential drivers (one for +, one for –) with precision resistor matching. Use Value: Ultra-low 8nV/√Hz noise floor maintains 120dB A-weighted SNR; 20V/µs slew rate preserves transient fidelity of PCM 24-bit/192kHz playback. |
Use Scenario: 4-way active speaker management system splitting full-range signal into LF/MF/HF/UHF bands before power amplification. IC Role / Device Role / Timing Role: All four OPA4134UA/2K5G4 channels deployed as 2nd-order Sallen-Key filters (LPF, BPF, HPF, APF) with independent tuning. Use Value: Independent channel circuitry eliminates intermodulation between bands; 8MHz GBW ensures flat group delay response through 20kHz. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar audio operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA4132UA | Lower THD+N (0.00005%), higher GBP (10MHz), but only rated for ±15V max supply; no ±18V operation | Better suited for high-resolution ADC buffer where supply is fixed at ±15V; unsuitable for ±18V studio gear | Select OPA4132UA only if supply is strictly ≤±15V and THD+N margin below 0.00008% is required |
| LM4562MA | Higher quiescent current (5.6mA/channel vs 4.5mA), slightly higher noise (2.7nV/√Hz), but superior PSRR (120dB) | Preferred in noisy switching-power-supply environments; less optimal for battery-powered low-noise portable audio | Choose LM4562MA when PSRR >110dB is mandatory and thermal budget allows +22% IQ increase |
Compared with OPA4134UA/2K5G4, OPA4132UA trades ±18V capability for marginal THD+N improvement, while LM4562MA prioritizes power-supply noise rejection over ultra-low bias current and supply flexibility-making OPA4134UA/2K5G4 the balanced choice for wide-supply, multichannel, low-distortion audio routing.
Availability
OPA4134UA/2K5G4 is available at Aetrix Electronics and suitable for professional audio mixing consoles, studio monitor preamplifiers, USB audio interface line outputs, and active crossover networks requiring stable component supply with guaranteed long-term availability.
Supply support for OPA4134UA/2K5G4 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 for precision and audio markets.
The OPAx134 product line was engineered specifically for audiophile-grade signal chain applications-emphasizing ultra-low distortion, FET-input integrity, and multichannel independence to meet the demands of recording studios, broadcast equipment, and high-end consumer audio.
FAQ
What is the maximum supply voltage for OPA4134UA/2K5G4?
The OPA4134UA/2K5G4 supports dual-supply operation from ±2.5V to ±18V, with absolute maximum rating of ±18V. Exceeding ±18V risks permanent damage per Section 5.1 Absolute Maximum Ratings. At ±18V, it achieves 21.3dBu headroom with THD+N < 0.01%, making it ideal for high-voltage studio audio rails.
Does OPA4134UA/2K5G4 require external compensation?
No, the OPA4134UA/2K5G4 is unity-gain stable and requires no external compensation components. Its internal compensation ensures stable operation in all standard configurations-including voltage followers, inverting/noninverting amplifiers, integrators, and active filters-without risk of oscillation or peaking.
How does OPA4134UA/2K5G4 handle input overvoltage conditions?
The OPA4134UA/2K5G4 incorporates input protection diodes clamping to the supply rails. Inputs may swing up to (V–) – 0.5V and (V+) + 0.5V safely; beyond that, input current must be limited to ≤10mA. Crucially, it exhibits no phase reversal even when inputs exceed the common-mode range by 10V-unlike many legacy FET-input op amps.
What is the thermal performance of OPA4134UA/2K5G4 in SOIC-14 package?
In its SOIC-14 (D) package, the OPA4134UA/2K5G4 has RθJA = 97°C/W, RθJC(top) = 56°C/W, and RθJB = 53°C/W. At 85°C ambient and 4.5mA per amplifier (18mA total), junction temperature rise is ~1.75°C-well within the 150°C absolute max-enabling reliable operation in compact audio PCB layouts without forced air cooling.
Can OPA4134UA/2K5G4 drive 600Ω loads effectively?
Yes, the OPA4134UA/2K5G4 delivers 0.00015% THD+N into 600Ω at 1kHz (per Section 5.7), with output swing of (V+) – 1.5V / (V–) + 1.2V. At ±15V supply, this yields >26Vpp usable output, sufficient for professional line-level (+24dBu) transmission. Its 36mA sourcing capability ensures robust drive into reactive or capacitive-loaded 600Ω interfaces.
OPA4134UA/2K5G4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SoundPlus™
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Amplifier Type:
- Audio
- Number of Circuits:
- 4
- Output Type:
- -
- Slew Rate:
- 20V/µs
- Gain Bandwidth Product:
- 8 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 5 pA
- Voltage - Input Offset:
- 500 µV
- Current - Supply:
- 4mA (x4 Channels)
- Current - Output / Channel:
- 35 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:
- 14-SOIC
OPA4134UA/2K5G4 FAQ
1.How can I place an order for OPA4134UA/2K5G4 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA4134UA/2K5G4 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 OPA4134UA/2K5G4 reliable?
The price and inventory of OPA4134UA/2K5G4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA4134UA/2K5G4 is usually 5 days.
3.What payment methods are accepted for OPA4134UA/2K5G4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA4134UA/2K5G4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA4134UA/2K5G4?
OPA4134UA/2K5G4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA4134UA/2K5G4 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 OPA4134UA/2K5G4?
For technical support, including OPA4134UA/2K5G4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA4134UA/2K5G4 requirements.
6.How does Aetrix verify that OPA4134UA/2K5G4 is sourced from the original manufacturer or authorized distributors?
All OPA4134UA/2K5G4 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 OPA4134UA/2K5G4 meets industry standards.
7.What is the process for return or replacement of OPA4134UA/2K5G4?
All OPA4134UA/2K5G4 units undergo pre-shipment inspection (PSI). If there is an issue with OPA4134UA/2K5G4, 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 OPA4134UA/2K5G4 part is unused and in its original packaging.
Return procedure for OPA4134UA/2K5G4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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