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Texas Instruments OPA2134PA
- Part No.:
- OPA2134PA
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
OPA2134PA.pdf
- Description:
- IC AUDIO 2 CIRCUIT 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:2,409
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Product details
Overview
OPA2134PA from Texas Instruments is a dual-channel, high-fidelity audio operational amplifier with true FET input stage, ultra-low THD+N (0.00008% at 1kHz), 8nV/√Hz input voltage noise, and 20V/µs slew rate. It operates from ±2.5V to ±18V supplies and delivers rail-to-rail output swing within 1.5V of rails into 2kΩ - optimized for professional line drivers and preamplifier stages in studio-grade audio equipment.
For engineers reviewing the OPA2134PA datasheet, OPA2134PA pinout, OPA2134PA application, or OPA2134PA equivalent, key selection criteria include its FET-input bias current (5pA), channel separation (128dB at DC), unity-gain stability, and absence of phase reversal - critical for high-precision, low-distortion analog signal chains in recording interfaces and active crossover networks.
Technical Context
The OPA2134PA implements a fully differential, cascoded JFET input stage that maintains ultra-low input bias current (5pA) across –40°C to +85°C while enabling >120dB open-loop gain and 8MHz gain-bandwidth product. Its internal compensation ensures unity-gain stability without external components, even with 100pF capacitive loads.
Each amplifier channel operates independently with no crosstalk coupling - verified by 128dB DC channel separation and <0.00015% THD+N into 600Ω - making it suitable for stereo pair configurations where inter-channel integrity is essential, such as balanced line receivers and dual-mono microphone preamps.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| THD+N | 0.00008% at 1kHz, 3Vrms, 2kΩ load - enables transparent signal reproduction below audible distortion threshold. |
| Slew Rate | 20V/µs - supports full-swing transient response up to 20kHz without slewing-induced distortion. |
| Input Voltage Noise | 8nV/√Hz at 1kHz - preserves dynamic range in low-level signal amplification (e.g., phono preamp inputs). |
| Input Bias Current | 5pA - minimizes DC error and source impedance–induced distortion in high-Z sensor or passive filter interfaces. |
| Supply Range | ±2.5V to ±18V - accommodates both portable battery-powered designs (±3V) and high-headroom studio gear (±15V). |
| Output Swing | Within 1.5V of rails into 2kΩ - delivers >21dBu headroom at 0.01% THD+N, extending usable dynamic range. |
| Channel Separation | 128dB at DC - prevents inter-channel leakage in stereo/multichannel audio routing and summing applications. |
Pinout & Package
OPA2134PA is supplied in an 8-pin PDIP (Plastic Dual In-line Package) with 0.3-inch body width and through-hole mounting. Pin spacing is 0.1 inch, compatible with standard 0.1" pitch PCB layouts and socketing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT A | Amplifier A output - drives external load; capable of ±36mA sourcing/sinking with thermal derating. |
| 2 | –IN A | Inverting input, channel A - forms feedback node in inverting configurations; virtual ground reference. |
| 3 | +IN A | Noninverting input, channel A - high-impedance FET node; requires matched source impedance for minimal distortion. |
| 4 | V– | Negative power supply - must be bypassed with ≥10nF ceramic capacitor near pin for noise suppression. |
| 5 | +IN B | Noninverting input, channel B - electrically isolated from channel A; enables independent stereo signal paths. |
| 6 | –IN B | Inverting input, channel B - identical functional role to Pin 2 but for second amplifier; no internal coupling. |
| 7 | OUT B | Amplifier B output - fully independent output stage; maintains performance when channel A is overloaded. |
| 8 | V+ | Positive power supply - shared rail for both amplifiers; requires local decoupling to minimize supply-induced crosstalk. |
Key Features
| Feature | Design Value |
|---|---|
| No phase reversal | Operates safely beyond common-mode input range (±13.5V) without output polarity inversion - eliminates latch-up risk in follower circuits. |
| FET input architecture | True p-channel JFET differential pair delivers 5pA IB and 10¹³Ω input impedance - ideal for piezoelectric sensors and passive tone controls. |
| Rail-to-rail output swing | Delivers >21dBu headroom at 0.01% THD+N - maximizes signal-to-noise ratio in line-level audio distribution. |
| Unity-gain stable | Stable with gain ≥1 and CL ≤ 100pF - simplifies design of buffers, filters, and gain stages without external compensation. |
| Low inter-channel crosstalk | 128dB DC channel separation - preserves stereo imaging fidelity in dual-channel applications like active crossovers. |
Applications
| Professional Audio Line Driver | Studio Microphone Preamplifier |
|---|---|
Use Scenario: Driving long balanced XLR cables from mixing console outputs to remote power amplifiers or recording devices. IC Role / Device Role / Timing Role: Dual-channel voltage buffer with high output drive (±36mA), low output impedance (<0.01Ω closed-loop), and exceptional CMRR (>100dB) to reject induced noise. Use Value: Maintains signal integrity over 100m cable runs with <0.00015% THD+N into 600Ω, eliminating audible degradation in critical monitoring paths. |
Use Scenario: First-stage amplification of low-level condenser mic signals (–60dBV) before ADC conversion in audio interfaces. IC Role / Device Role / Timing Role: Low-noise, high-Z noninverting amplifier with 5pA input bias current and 8nV/√Hz voltage noise density. Use Value: Achieves >115dB SNR in 20Hz–20kHz bandwidth without requiring external JFET front-end, reducing component count and layout complexity. |
| Active Crossover Network | High-Fidelity Line Receiver |
Use Scenario: Splitting full-range audio into band-limited signals for separate woofer/tweeter amplification in bi-amped loudspeaker systems. IC Role / Device Role / Timing Role: Dual-channel precision op-amp implementing 2nd-order Butterworth low-pass/high-pass filters with matched gain and phase response. Use Value: 128dB channel separation prevents bass leakage into tweeter path, preserving transient accuracy and preventing driver damage from low-frequency energy. |
Use Scenario: Receiving balanced line-level signals from digital audio workstations or broadcast equipment via transformer-coupled inputs. IC Role / Device Role / Timing Role: Differential receiver stage converting balanced input to single-ended output with >100dB PSRR and 86dB CMRR. Use Value: Rejects common-mode noise from EMI-rich studio environments while delivering <0.00008% THD+N - essential for master clock distribution and reference monitoring. |
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 | Same electrical specs; SOIC-8 surface-mount package instead of PDIP-8 - 50% smaller footprint, lower parasitic inductance. | Better suited for space-constrained PCBs and automated assembly; not socket-compatible with OPA2134PA. | Select OPA2134UA for new SMT designs; retain OPA2134PA for through-hole prototyping or legacy board reuse. |
| NE5532AP | Bipolar input (200nA IB), higher THD+N (0.002%), 10x higher input noise (5nV/√Hz vs 8nV/√Hz), but higher output drive (±38mA). | Acceptable for cost-sensitive consumer audio; unsuitable for ultra-low-distortion professional applications requiring <0.0001% THD+N. | Choose NE5532AP only when budget constraints outweigh fidelity requirements - not a drop-in replacement due to input stage mismatch and noise floor differences. |
Compared with OPA2134UA and NE5532AP, the OPA2134PA uniquely combines FET-input precision (5pA IB), studio-grade distortion performance (0.00008% THD+N), and through-hole serviceability - making it the preferred choice for hand-assembled, high-reliability audio test fixtures and calibration-grade equipment.
Availability
OPA2134PA is available at Aetrix Electronics and suitable for professional audio equipment, studio monitor controllers, and high-fidelity DAC output stages requiring stable component supply, long-term obsolescence management, and traceable lot-level documentation.
Supply support for OPA2134PA 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 over 50 years of innovation in precision amplifiers and signal-chain solutions.
The OPAx134 family was engineered specifically for high-end audio applications demanding ultra-low distortion, wide dynamic range, and immunity to phase reversal - targeting studio recording gear, broadcast infrastructure, and audiophile playback systems.
FAQ
What is the maximum recommended supply voltage for OPA2134PA?
The OPA2134PA is rated for dual-supply operation from ±2.5V to ±18V. Absolute maximum supply voltage is ±18V; exceeding this risks permanent damage. For optimal THD+N and headroom performance, ±15V is the most commonly used nominal supply in professional audio designs using the OPA2134PA.
Does OPA2134PA require external compensation for unity-gain stability?
No, the OPA2134PA is internally compensated and unity-gain stable across its full operating temperature range (–40°C to +85°C). It remains stable driving capacitive loads up to 100pF without added series resistance or external compensation networks - a key advantage confirmed in the OPA2134PA datasheet Figure 5-23.
Can OPA2134PA be used in single-supply configurations?
Yes, the OPA2134PA supports single-supply operation from 5V to 36V. When used in single-supply mode, the input common-mode range extends from (V–) + 2.5V to (V+) – 3.5V, and output swings within 1.5V of each rail into 2kΩ. Proper level-shifting and mid-rail biasing are required for AC-coupled audio signals.
What is the thermal resistance (RθJA) of the OPA2134PA PDIP package?
The OPA2134PA in the 8-pin PDIP package has a junction-to-ambient thermal resistance (RθJA) of 71°C/W, as specified in Section 5.5 of the official Texas Instruments datasheet SBOS058B. This value assumes standard JEDEC 2S2P test conditions and guides heatsinking decisions for continuous high-output applications.
Is OPA2134PA pin-compatible with other dual op-amps like TL072 or NE5532?
No, the OPA2134PA uses a nonstandard pinout: OUT A (Pin 1), –IN A (Pin 2), +IN A (Pin 3), V– (Pin 4), +IN B (Pin 5), –IN B (Pin 6), OUT B (Pin 7), V+ (Pin 8). TL072 and NE5532 use different assignments (e.g., V+ on Pin 8, V– on Pin 4), so direct substitution would cause circuit malfunction unless board layout is modified.
OPA2134PA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SoundPlus™
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Active
- Amplifier Type:
- Audio
- Number of Circuits:
- 2
- 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 (x2 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:
- Through Hole
- Supplier Device Package:
- 8-PDIP
OPA2134PA FAQ
1.How can I place an order for OPA2134PA through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA2134PA 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 OPA2134PA reliable?
The price and inventory of OPA2134PA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA2134PA is usually 5 days.
3.What payment methods are accepted for OPA2134PA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA2134PA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA2134PA?
OPA2134PA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA2134PA 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 OPA2134PA?
For technical support, including OPA2134PA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA2134PA requirements.
6.How does Aetrix verify that OPA2134PA is sourced from the original manufacturer or authorized distributors?
All OPA2134PA 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 OPA2134PA meets industry standards.
7.What is the process for return or replacement of OPA2134PA?
All OPA2134PA units undergo pre-shipment inspection (PSI). If there is an issue with OPA2134PA, 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 OPA2134PA part is unused and in its original packaging.
Return procedure for OPA2134PA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
OPA2134PA Tags
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