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Texas Instruments OPA134PAG4
- Part No.:
- OPA134PAG4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
OPA134PAG4.pdf
- Description:
- IC AUDIO 1 CIRCUIT 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,041
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Product details
Overview
OPA134PAG4 from Texas Instruments is a single-channel, high-performance FET-input audio operational amplifier designed for ultra-low distortion signal conditioning in professional analog audio paths. It delivers 0.00008% THD+N at 1kHz, 8nV/√Hz input voltage noise, 20V/µs slew rate, and operates from ±2.5V to ±18V supplies - enabling use in line drivers, preamplifiers, and active filters where fidelity and headroom are critical.
For engineers reviewing the OPA134PAG4 datasheet, OPA134PAG4 pinout, OPA134PAG4 application, or OPA134PAG4 equivalent, key selection criteria include its true FET-input architecture (5pA IB), rail-to-rail output swing within 1V of supply rails, unity-gain stability, and verified performance across –40°C to +85°C with SOIC-8 packaging.
Technical Context
The OPA134PAG4 implements a fully differential JFET input stage with cascode common-mode rejection, eliminating phase reversal even when inputs exceed the common-mode range by ±10V. Its internal compensation ensures unity-gain stability while sustaining 8MHz gain-bandwidth and low closed-loop output impedance (0.01Ω at 10kHz) into capacitive loads up to 100pF.
Input bias current remains stable at ±5pA (typ) over temperature and common-mode voltage due to matched p-channel JFETs and cascoded input circuitry; output drive capability supports ±36mA sourcing and ±30mA sinking, with headroom of 21.3dBu (11.7Vrms at THD+N < 0.01%) into 2kΩ.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| THD+N | 0.00008% at 1kHz, 3Vrms, 2kΩ load - enables transparent signal reproduction in high-end audio without audible harmonic artifacts |
| Input Voltage Noise | 8nV/√Hz at 1kHz - preserves dynamic range in low-level microphone and phono preamp stages |
| Slew Rate | 20V/µs - supports full-swing transient response up to 100kHz without slewing-induced distortion |
| Gain Bandwidth | 8MHz - allows stable operation in unity-gain buffers and high-Q active filters up to 20kHz |
| Supply Range | ±2.5V to ±18V - accommodates both portable battery-powered and studio-grade ±15V systems |
| Output Swing | Within 1.5V of rails (2kΩ load) - maximizes usable voltage headroom in line-level circuits |
| Open-Loop Gain | 120dB at 2kΩ load - ensures precise DC accuracy and minimal gain error in precision amplification |
Pinout & Package
OPA134PAG4 is housed in an 8-pin SOIC (SO-8) surface-mount package with standard pinout and thermal metrics: RθJA = 160°C/W, RθJB = 60°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | No Connect | 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 voltage range |
| 4 | Negative Supply (V–) | Low-side power rail connection; supports dual-supply operation down to –2.5V |
| 5 | No Connect | Internally unconnected; must be left floating per TI specification |
| 6 | Output (OUT) | Class-AB output stage capable of ±36mA sourcing/sinking into 2kΩ |
| 7 | Positive Supply (V+) | High-side power rail connection; supports dual-supply operation up to +18V |
| 8 | No Connect | No internal connection; must be left floating per TI specification |
Key Features
| Feature | Design Value |
|---|---|
| True FET input stage | 5pA typical input bias current enables high-impedance sensor interfacing and minimal loading of passive tone controls |
| Phase-reversal immunity | Operates reliably even with inputs driven 10V beyond supply rails - eliminates latch-up risk in voltage-follower line receivers |
| Ultra-low distortion architecture | 0.00008% THD+N and flat distortion vs. frequency ensure consistent tonal neutrality across 20Hz–20kHz |
| Rail-swing output stage | Delivers >21Vpp output swing on ±15V supplies - increases dynamic range in line driver applications |
| Unity-gain stable design | Guarantees stability without external compensation in gain-of-1 buffers and active filter topologies |
Applications
| Professional Audio Line Driver | Studio Preamplifier Stage |
|---|---|
Use Scenario: Driving balanced XLR outputs from mixing consoles or digital audio workstations into long cable runs. IC Role / Device Role / Timing Role: High-output-current, low-distortion buffer with wide common-mode rejection and rail-swing capability. Use Value: Maintains 0.00008% THD+N at 10Vrms into 600Ω, preventing interconnect-induced coloration over 100m cables. |
Use Scenario: Low-noise gain stage for condenser microphone signals prior to ADC conversion. IC Role / Device Role / Timing Role: Ultra-low-noise, low-input-bias-current amplifier with laser-trimmed offset for DC-coupled signal chains. Use Value: 8nV/√Hz input voltage noise and 5pA IB preserve SNR in 200Ω–2kΩ source impedances without requiring external offset nulling. |
| Active Crossover Network | Multimedia Audio DAC Output Buffer |
Use Scenario: Implementing steep-slope (24dB/octave) high-pass and low-pass filters in bi/tri-amped speaker systems. IC Role / Device Role / Timing Role: Unity-gain stable, high-slew-rate op amp configured as MFB or state-variable filter sections. Use Value: 20V/µs slew rate prevents transient intermodulation distortion during high-amplitude bass transients at crossover frequencies. |
Use Scenario: Post-DAC analog filtering and level-setting in consumer AV receivers and soundbars. IC Role / Device Role / Timing Role: Single-supply-capable (5V–36V) audio buffer with low quiescent current (4.5mA) and ESD-hardened I/O. Use Value: ±2000V HBM ESD rating and –40°C to +85°C qualification ensure robustness in cost-sensitive mass-produced audio equipment. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar audio operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA1611AIDR | Lower noise (1.1nV/√Hz), higher GBW (45MHz), but higher quiescent current (3.6mA per amp vs. 4.5mA for OPA134PAG4); bipolar input (200nA IB) | Better suited for ultra-low-noise microphone preamps; less ideal for high-impedance passive tone stacks due to higher IB | Select OPA1611AIDR when voltage noise dominates system noise floor and supply current is not constrained |
| NE5532AP | Higher THD+N (0.002%), higher noise (5nV/√Hz), lower slew rate (9V/µs); bipolar input (800nA IB), higher output current (±38mA) | Cost-optimized for general-purpose audio; lacks phase-reversal immunity and rail-swing output | Select NE5532AP only for non-critical line-level buffering where BOM cost is primary constraint |
Compared with OPA134PAG4, OPA1611AIDR offers superior noise performance at the expense of input bias current and cost, while NE5532AP trades measurable distortion and stability margins for legacy compatibility and lower unit price - making OPA134PAG4 the optimal balance of fidelity, robustness, and SOIC-8 manufacturability in premium analog audio designs.
Availability
OPA134PAG4 is available at Aetrix Electronics and suitable for professional audio equipment, studio recording interfaces, and high-fidelity multimedia systems requiring stable component supply with guaranteed long-term availability and traceable sourcing.
Supply support for OPA134PAG4 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 OPAx134 family was engineered specifically for high-end audio applications demanding ultra-low distortion, low noise, and exceptional DC precision - targeting professional recording gear, broadcast infrastructure, and audiophile-grade consumer electronics.
FAQ
What is the maximum operating supply voltage for OPA134PAG4?
The OPA134PAG4 supports dual-supply operation from ±2.5V to ±18V, corresponding to a total supply voltage range of 5V to 36V. Absolute maximum ratings specify 36V between V+ and V–, but recommended operation limits are ±18V to ensure specified performance including THD+N, slew rate, and output swing remain within datasheet guarantees.
Does OPA134PAG4 require external compensation for unity-gain stability?
No, the OPA134PAG4 is internally compensated and unity-gain stable. It maintains phase margin >60° and exhibits no peaking or ringing in unity-gain buffer configurations, even with 100pF capacitive loads - verified across –40°C to +85°C and ±2.5V to ±18V supply ranges per TI SBOS058B.
What is the input common-mode voltage range for OPA134PAG4?
The OPA134PAG4 has an input common-mode voltage range of (V–) + 2.5V to (V+) – 3.5V at ±15V supplies. This means it operates correctly with inputs from –12.5V to +11.5V, and remains functional - without phase reversal - even when inputs exceed this range by up to ±10V, a key reliability feature confirmed in Section 6.2.4 of the datasheet.
Can OPA134PAG4 drive 600Ω loads effectively?
Yes, the OPA134PAG4 delivers 0.00015% THD+N at 1kHz into 600Ω with 3Vrms output, and sustains ±36mA sourcing and ±30mA sinking capability. Its output stage maintains low distortion and stable settling (0.7µs to 0.1%) under these conditions, making it suitable for professional line-driving applications requiring 600Ω termination compliance.
Is OPA134PAG4 pin-compatible with other OPAx134 variants?
The OPA134PAG4 shares identical SOIC-8 pinout with the OPA2134 (dual) and OPA4134 (quad) only for shared pins (V+, V–, OUT, +IN, –IN); however, NC pins differ across variants. Specifically, OPA134PAG4 has NC on pins 1, 5, and 8, whereas OPA2134 uses pins 1 and 7 as outputs and OPA4134 uses pins 1 and 14 as outputs - so direct PCB substitution is not supported.
OPA134PAG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SoundPlus™
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- 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:
- Through Hole
- Supplier Device Package:
- 8-PDIP
OPA134PAG4 FAQ
1.How can I place an order for OPA134PAG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA134PAG4 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 OPA134PAG4 reliable?
The price and inventory of OPA134PAG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA134PAG4 is usually 5 days.
3.What payment methods are accepted for OPA134PAG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA134PAG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA134PAG4?
OPA134PAG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA134PAG4 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 OPA134PAG4?
For technical support, including OPA134PAG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA134PAG4 requirements.
6.How does Aetrix verify that OPA134PAG4 is sourced from the original manufacturer or authorized distributors?
All OPA134PAG4 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 OPA134PAG4 meets industry standards.
7.What is the process for return or replacement of OPA134PAG4?
All OPA134PAG4 units undergo pre-shipment inspection (PSI). If there is an issue with OPA134PAG4, 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 OPA134PAG4 part is unused and in its original packaging.
Return procedure for OPA134PAG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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