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Texas Instruments OPA134UAE4
- Part No.:
- OPA134UAE4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
OPA134UAE4.pdf
- Description:
- IC AUDIO 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,507
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Product details
Overview
OPA134UAE4 from Texas Instruments is a single-channel, high-performance FET-input audio operational amplifier designed for ultra-low distortion signal conditioning in professional line-level circuits. It delivers 0.00008% THD+N at 1kHz, 8nV/√Hz input voltage noise, and 20V/µs slew rate, enabling clean amplification in studio preamplifiers and active crossover networks.
For engineers reviewing the OPA134UAE4 datasheet, OPA134UAE4 pinout, OPA134UAE4 application, or OPA134UAE4 equivalent, this page provides verified specifications, SOIC-8 package details, audio-grade performance context, and validated alternative options for line driver, receiver, and filter design.
Technical Context
The OPA134UAE4 implements a true JFET-input stage with 5pA input bias current and rail-to-rail output swing within 1V of supply rails, supporting ±2.5V to ±18V dual-supply operation. Its unity-gain stability, 8MHz gain-bandwidth product, and 120dB open-loop gain enable precision DC-coupled audio paths without phase reversal or overload recovery issues.
Input cascode circuitry maintains low distortion across –12.5V to +11.5V common-mode range while delivering 128dB channel separation (in dual/quad variants) and 90–106dB PSRR. The device drives 2kΩ loads with 21.3dBu headroom at <0.01% THD+N and remains stable with ≥100pF capacitive loads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| THD+N | 0.00008% at 1kHz, 3Vrms, 2kΩ load - enables transparent signal reproduction in critical listening paths |
| Slew Rate | 20V/µs - supports full-swing transient response up to 20kHz without slewing distortion |
| Input Voltage Noise | 8nV/√Hz at 1kHz - preserves dynamic range in low-level microphone and phono preamp stages |
| Gain Bandwidth | 8MHz - allows stable unity-gain and high-gain configurations for active filters and equalizers |
| Supply Range | ±2.5V to ±18V - accommodates legacy ±15V studio gear and modern low-voltage portable audio |
| Output Swing | Within 1.2V of rails (2kΩ) - maximizes usable headroom in ±15V systems (21.3dBu) |
| Input Bias Current | 5pA max - minimizes DC error and source impedance sensitivity in high-Z sensor interfaces |
Pinout & Package
OPA134UAE4 is housed in an 8-pin SOIC (SO-8) surface-mount package with standard D-package footprint and thermal characteristics (RθJA = 160°C/W). Pin functions are electrically identical to the PDIP variant but optimized for automated assembly and board space efficiency.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | No Connect (NC) | Internally unconnected - must be left floating per TI specification |
| 2 | Inverting Input (–IN) | Differential input node; virtual ground in inverting configurations |
| 3 | Noninverting Input (+IN) | Differential input node; reference point for common-mode rejection |
| 4 | Negative Supply (V–) | Low-side power rail connection; referenced to system ground in single-supply designs |
| 5 | No Connect (NC) | Internally unconnected - must be left floating |
| 6 | Output (OUT) | Class-AB output stage capable of ±30mA sink/source into 2kΩ |
| 7 | Positive Supply (V+) | High-side power rail; decoupling capacitor required for noise suppression |
| 8 | No Connect (NC) | No internal connection - float per datasheet; not used for thermal pad |
Key Features
| Feature | Design Value |
|---|---|
| True FET input stage | 5pA input bias current enables high-impedance source interfacing without DC offset drift |
| No phase reversal | Operates safely beyond common-mode range (±10V beyond rails) - eliminates latch-up in follower circuits |
| Rail-to-rail output swing | Delivers >21dBu headroom on ±15V supplies - critical for professional line-level dynamic range |
| Unity-gain stable | Supports direct buffer, integrator, and active filter topologies without external compensation |
| Low interchannel crosstalk | 128dB isolation at DC (dual/quad variants) - essential for stereo imaging and multi-channel processing |
Applications
| Studio Line Driver | Active Crossover Network |
|---|---|
Use Scenario: Driving balanced XLR outputs from digital audio workstations or analog mixing consoles over 10m cable runs. IC Role / Device Role / Timing Role: High-output-current, low-distortion voltage buffer with 2kΩ load drive capability and wide bandwidth. Use Value: Maintains 0.00008% THD+N at 10Vrms output, preserving transient fidelity and minimizing intermodulation in multi-channel routing. |
Use Scenario: Implementing 2nd-order Linkwitz-Riley filters in bi/tri-amped loudspeaker systems with independent high/mid/low band control. IC Role / Device Role / Timing Role: Precision op-amp in Sallen-Key topology with matched gain-bandwidth and low noise floor. Use Value: 8MHz GBW and 20V/µs slew rate ensure flat amplitude and phase response up to 20kHz, preventing driver time misalignment. |
| Phono Preamplifier Stage | Professional Audio Line Receiver |
Use Scenario: RIAA-equalized amplification of moving-magnet cartridge signals (5mV nominal) before ADC conversion. IC Role / Device Role / Timing Role: Low-noise, high-input-impedance transimpedance amplifier with precise DC offset control. Use Value: 8nV/√Hz input voltage noise dominates over resistor thermal noise below 2kΩ source impedance, maximizing SNR. |
Use Scenario: Receiving line-level signals from broadcast equipment or digital audio interfaces with long cable runs and EMI exposure. IC Role / Device Role / Timing Role: Differential receiver front-end with high CMRR (100dB) and robust input protection. Use Value: 86–100dB CMRR across audio band rejects ground-loop hum and RF interference without external baluns. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar audio operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA2134UA | Dual-channel version in same SO-8 package; identical per-channel specs but shares thermal mass | Preferred for stereo line drivers or dual-path active filters where channel matching and layout symmetry matter | Select OPA2134UA when two matched amplifiers are needed on one die to minimize tracking variance and PCB area |
| NE5532AP | Bipolar input; higher 5µV/°C offset drift, 0.0005% THD+N, and 3.5mA quiescent current per amp | Lower cost for non-critical consumer audio; less suitable for ultra-low-noise phono or mastering applications | Choose NE5532AP only for budget-sensitive line-level buffering where 0.0005% THD+N is acceptable |
Compared with OPA134UAE4, the OPA2134UA offers integrated dual-channel matching at no performance trade-off, while the NE5532AP sacrifices noise and distortion for cost and power efficiency - making OPA134UAE4 optimal for high-fidelity signal chains demanding sub-0.0001% THD+N.
Availability
OPA134UAE4 is available at Aetrix Electronics and suitable for professional audio equipment, studio monitor controllers, and high-end active speaker designs requiring stable component supply and long-term lifecycle support.
Supply support for OPA134UAE4 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 precision op-amps and audio signal chain solutions.
The OPA134UAE4 belongs to TI's SoundPlus™ audio op-amp family, engineered specifically for ultra-low distortion and low-noise performance in professional recording, broadcast, and high-resolution playback systems.
FAQ
What is the maximum supply voltage for OPA134UAE4?
The OPA134UAE4 supports dual-supply operation from ±2.5V to ±18V, with absolute maximum ratings specifying 36V total supply voltage (V+ to V–). Operation at ±18V is fully characterized and supported across the –40°C to +85°C temperature range, delivering 21.3dBu headroom at <0.01% THD+N. Exceeding ±18V risks permanent damage per Absolute Maximum Ratings.
Does OPA134UAE4 require external compensation for unity-gain stability?
No, the OPA134UAE4 is internally compensated for unity-gain stability and operates reliably in buffer, inverting, and non-inverting configurations without external components. Its 8MHz gain-bandwidth product and 20V/µs slew rate are guaranteed under unity-gain conditions with 2kΩ loads and 100pF capacitive loads, as verified in TI's SBOS058B datasheet Figure 5-22 and 5-23.
How does OPA134UAE4 handle input overvoltage conditions?
The OPA134UAE4 input pins are diode-clamped to the supply rails, allowing safe operation with input signals extending up to 0.5V beyond V+ or V– if current-limited to ≤10mA. Unlike many FET-input op-amps, it exhibits no phase reversal when inputs exceed the common-mode range - a key feature confirmed in Section 6.2.4 of the datasheet for robustness in line-receiver applications.
What is the thermal resistance of OPA134UAE4 in SOIC-8 package?
The OPA134UAE4 in SOIC-8 (D package) has a junction-to-ambient thermal resistance (RθJA) of 160°C/W, junction-to-board (RθJB) of 60°C/W, and junction-to-case (top) (RθJC(top)) of 75°C/W. These values assume standard JEDEC 2-layer board layout per datasheet Section 5.4 and are critical for calculating junction temperature rise under 4–5mA quiescent current per amplifier.
Can OPA134UAE4 drive 600Ω loads effectively?
Yes, the OPA134UAE4 delivers 0.00015% THD+N into 600Ω at 1kHz (per Section 5.7), though output swing is reduced to ±13.5V versus ±14.5V on 2kΩ. Its ±30mA sink/source capability ensures stable operation, but designers should verify thermal limits: at ±15V supply and 600Ω load, power dissipation exceeds 150mW, requiring attention to PCB copper area and ambient temperature per RθJA = 160°C/W.
OPA134UAE4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SoundPlus™
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Amplifier Type:
- Audio
- Number of Circuits:
- 1
- 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
- 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:
- 8-SOIC
OPA134UAE4 FAQ
1.How can I place an order for OPA134UAE4 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA134UAE4 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 OPA134UAE4 reliable?
The price and inventory of OPA134UAE4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA134UAE4 is usually 5 days.
3.What payment methods are accepted for OPA134UAE4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA134UAE4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA134UAE4?
OPA134UAE4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA134UAE4 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 OPA134UAE4?
For technical support, including OPA134UAE4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA134UAE4 requirements.
6.How does Aetrix verify that OPA134UAE4 is sourced from the original manufacturer or authorized distributors?
All OPA134UAE4 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 OPA134UAE4 meets industry standards.
7.What is the process for return or replacement of OPA134UAE4?
All OPA134UAE4 units undergo pre-shipment inspection (PSI). If there is an issue with OPA134UAE4, 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 OPA134UAE4 part is unused and in its original packaging.
Return procedure for OPA134UAE4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
OPA134UAE4 Tags
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