OPA2134UA/2K5 - Dual Audio Op-Amp 0.00008% THD | TI
MPN: OPA2134UA/2K5 β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.55 | $1.55 |
| 10 | $1.4 | $14.00 |
| 100 | $1.25 | $125.00 |
| 500 | $1.1 | $550.00 |
| 1,000 | $0.99 | $990.00 |
| 2,500 | $0.92 | $2,300.00 |
Drop-in alternatives for OPA2134UA/2K5 β same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
OPA2134UA/2K5-Q1
β Drop-Inπ Reference alternative (not in catalog)
OPA2132UA
β Drop-Inπ Reference alternative (not in catalog)
NE5532DR
β Drop-Inπ Reference alternative (not in catalog)
TL072IDR
β Drop-Inπ Reference alternative (not in catalog)
AD827ARZ
β Drop-Inπ Reference alternative (not in catalog)
OPA2134UA/2K5 Maximum Ratings & Electrical Characteristics
| Number of Channels | 2 |
| Total Harmonic Distortion | 0.00008% |
| Input Voltage Noise | 8 nV/rtHz |
| Input Bias Current | 5 pA (FET input) |
| Slew Rate | 20 V/us |
| Gain-Bandwidth Product | 8 MHz |
| Supply Voltage Range | +/-2.5 V to +/-18 V |
| Open-Loop Gain | 600 V/mV |
| Input Stage | True FET input |
| Output Drive | High output drive capability |
| Package | SOIC-8 (D) |
| Mounting Type | Surface Mount |
| Packaging | Tape & Reel, 2500 units |
| Product Series | OPAx134 SoundPlus |
| Application Focus | Audio |
| RoHS Status | Compliant |
OPA2134UA/2K5 Pin Configuration
| Pin 1 | OUT A β Channel A output |
| Pin 2 | -IN A β Channel A inverting input |
| Pin 3 | +IN A β Channel A non-inverting input |
| Pin 4 | V- β Negative supply |
| Pin 5 | +IN B β Channel B non-inverting input |
| Pin 6 | -IN B β Channel B inverting input |
| Pin 7 | OUT B β Channel B output |
| Pin 8 | V+ β Positive supply |
Safe Operating Area (SOA) & Thermal Characteristics
No official SOA curve available for this component. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.
Typical Applications
OPA2134UA/2K5 is suitable for 6 applications: Audio DAC Output Buffering (I/V Conversion), Professional Line Drivers and Receivers, Active Crossovers and EQ Filters, Microphone Preamplifiers, Guitar Effects and Instrument Interfaces, Audio Test and Measurement Instrumentation.
Audio DAC Output Buffering (I/V Conversion)
The OPA2134UA/2K5's 0.00008% THD and 8 nV/rtHz noise make it a classic choice for current-to-voltage conversion at the output of audio DACs, where any added distortion directly limits dynamic range. Its 5 pA FET input bias current introduces negligible DC error at the DAC summing node, and the 8 MHz gain-bandwidth maintains adequate loop gain at audio frequencies. Placed immediately after the DAC current outputs with short feedback traces, it adds no switching noise and drives low-pass filter stages or line outputs directly.
Recommended
Professional Line Drivers and Receivers
Studio and live-sound equipment running on +/-15 V or +/-18 V rails benefits directly from the OPA2134UA/2K5's +/-18 V maximum supply rating and high output drive capability. Its 20 V/us slew rate supports full-level 20 kHz signals with wide margin, and the 600 V/mV open-loop gain keeps closed-loop linearity high for balanced line receivers. The dual channel in one SOIC-8 matches the natural two-channel-per-connector structure of professional balanced audio I/O.
Recommended
Active Crossovers and EQ Filters
Active crossover and tone-control stages cascade multiple op amp filter sections, so per-stage distortion accumulates. The OPA2134UA/2K5's 0.00008% THD keeps total signal-chain distortion far below audibility even after several filter stages. Its FET inputs allow the use of large resistor values in Sallen-Key and multiple-feedback topologies without bias-current-induced offset, and the 8 MHz bandwidth preserves the filter transfer function accuracy at the top of the audio band.
Recommended
Microphone Preamplifiers
In condenser and dynamic mic preamps, the first-stage amplifier sets the system noise floor. The OPA2134UA/2K5's 8 nV/rtHz voltage noise and 5 pA FET input current combine low total input-referred noise with freedom from bias-current noise through high-value gate resistors. The +/-18 V supply range provides headroom for high-output condenser capsules, and the dual channel supports stereo preamps in a single SOIC-8 footprint for compact channel strips.
Recommended
Guitar Effects and Instrument Interfaces
Guitar pickups present very high source impedance in the hundreds of kilohms, which rapidly degrades bipolar-input op amps through loading and bias-current offset. The OPA2134UA/2K5's 5 pA FET input preserves pickup tone and dynamics, while its low 8 nV/rtHz noise keeps weak-signal stages quiet. Designers commonly use it for input buffers, clipping-stage recovery amplifiers, and output line drivers in pedals and audio interfaces powered from +/-9 V to +/-15 V rails.
Recommended
Audio Test and Measurement Instrumentation
Audio analyzers, signal generators, and distortion measurement fixtures require amplifiers whose own distortion is far below the level being measured. With 0.00008% THD (equivalent to roughly -122 dB), the OPA2134UA/2K5 serves as input attenuator buffers, gain stages, and low-pass anti-alias filters in measurement front ends. The 600 V/mV open-loop gain ensures gain accuracy and low distortion at closed-loop gains typical of instrumentation, and the wide +/-18 V supply supports full-scale test signals.
Recommended
Recommended Products Summary
Engineering reference data for OPA2134UA/2K5 β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | OPA2134UA/2K5-Q1 | OPA2132UA | NE5532DR | TL072IDR | AD827ARZ |
|---|---|---|---|---|---|---|
| Package | SOIC-8 (D) | SOIC-8 (D) - same | SOIC-8 (D) - same | SOIC-8 (D) - same | SOIC-8 (D) - same | SOIC-8 - same |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Analog Devices |
| Total Harmonic Distortion | 0.00008% | 0.00008% | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] |
| Gain-Bandwidth Product | 8 MHz | 8 MHz | 8 MHz | [DATA_NEEDED] | 3 MHz | [DATA_NEEDED] |
| Slew Rate | 20 V/us | 20 V/us | [DATA_NEEDED] | 9 V/us | 13 V/us | [DATA_NEEDED] |
| Input Stage | True FET (5 pA bias) | True FET (5 pA bias) | Bipolar | Bipolar | JFET | Bipolar |
| Supply Voltage Range | +/-2.5 V to +/-18 V | +/-2.5 V to +/-18 V | [DATA_NEEDED] | +/-3 V to +/-20 V | [DATA_NEEDED] | [DATA_NEEDED] |
| Automotive Grade | No | Yes (AEC-Q100) | No | No | No | No |
Key Differentiators
- True FET input with 5 pA bias current (vs OPA2132UA)
- Ultra-low 0.00008% THD (vs TL072IDR)
- Automotive-grade drop-in available (vs OPA2134UA/2K5-Q1)
Design Notes
Place a 0.1 uF ceramic bypass capacitor at each supply pin (pins 4 and 8) as close to the package as possible, plus a bulk 10 uF capacitor per rail near the device. The OPA2134 has an 8 MHz unity-gain bandwidth, so supply lead inductance from long traces can cause high-frequency instability or RF rectification. A solid ground plane under the amplifier region and short feedback traces complete a robust layout.
The OPA2134's FET inputs (5 pA bias) allow very high impedance networks, but guard high-impedance input nodes with clean board area and keep the inverting-node trace area minimal to limit stray capacitance, which erodes phase margin. For gains of 1 or higher with capacitive loads above roughly 100 pF, add a small series output resistor to decouple the load and maintain stability.
The OPA2134 is not a rail-to-rail amplifier: input common-mode range and output swing stop well short of the supply rails. Design gain stages so that expected signal swings keep several volts of headroom from +/-18 V limits, or distortion will rise sharply. Also verify polarity and PCB silkscreen before soldering - replacing blown OPA2134s due to reversed supply or mislabeled footprints is a well-documented field failure.
Compliance Information
RoHS compliant and lead-free per DigiKey/Mouser/LCSC product data. AEC-Q100 qualification applies only to the OPA2134UA/2K5-Q1 variant.
