OPA2134UA/2K5-Q1 - Dual FET-Input Audio Op-Amp, 8MHz | TI
MPN: OPA2134UA/2K5-Q1 β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.45 | $1.45 |
| 10 | $1.31 | $13.10 |
| 100 | $1.09 | $109.00 |
| 500 | $1.05 | $525.00 |
| 1,000 | $0.98 | $980.00 |
| 2,500 | $0.94 | $2,350.00 |
Drop-in alternatives for OPA2134UA/2K5-Q1 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
β Drop-Inβ In Stock
$1.18 / Unit
View Datasheet βOPA2132UA/2K5
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OPA2227UA/2K5
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OPA2604UA
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NE5532ADR
β Drop-Inπ Reference alternative (not in catalog)
TL072CDT
β Drop-Inπ Reference alternative (not in catalog)
OPA2134UA/2K5-Q1 Maximum Ratings & Electrical Characteristics
| Amplifier Type | Audio Operational Amplifier (SoundPlus) |
| Number of Circuits | 2 (dual) |
| Distortion (THD+N) | 0.00008% |
| Input Noise Density | 8 nV/sqrt(Hz) |
| Input Bias Current | 5 pA (true FET input) |
| Slew Rate | 20 V/us |
| Gain Bandwidth Product | 8 MHz |
| Open-Loop Gain | 600 V/mV (approx. 120 dB) |
| Supply Voltage Range | +/-2.5 V to +/-18 V (5 V to 36 V single) |
| Input Type | True JFET (FET) input |
| Package | 8-SOIC |
| Mounting Type | Surface Mount |
| Packaging | Tape & Reel (/2K5, 2500 units) |
| RoHS Status | Compliant |
| Series | OPAx134 SoundPlus |
| Operating Temperature | [DATA_NEEDED: operating temperature range] |
OPA2134UA/2K5-Q1 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-Q1 is suitable for 6 applications: Professional Mixing Consoles and Preamplifiers, DAC Output Stage / I-V Conversion, Active Crossover Networks, Guitar Effects Pedals and Musical Instrument Electronics, Automotive Infotainment Audio Processing, Test and Measurement Signal Conditioning.
Professional Mixing Consoles and Preamplifiers
The OPA2134's 0.00008% THD+N and 8 nV/sqrt(Hz) noise make it a studio-standard channel amplifier. In console input stages it typically operates at gains of 1 to 100 from +/-15V rails, where the true FET input (5 pA bias) eliminates DC offsets when switchable gain networks are used. Its 20 V/us slew rate handles full-scale 20 kHz signals without slew-induced distortion, preserving transient detail.
Recommended
DAC Output Stage / I-V Conversion
As a DAC I/V converter and output buffer, the OPA2134's low 5 pA input bias current prevents voltage errors at the current-output node, and 8 MHz bandwidth keeps loop gain high across the 20 kHz audio band, lowering conversion distortion. Placed directly after current-output DACs with a feedback resistor plus compensation capacitor, then as a 2nd-order active low-pass at 50-100 kHz, it adds no audible coloration. Its high output drive easily buffers cables and headphone amplifiers downstream.
Recommended
Active Crossover Networks
In active speaker crossovers, the OPA2134 implements Sallen-Key or multiple-feedback filter sections from 12 dB/oct to 48 dB/oct. The 0.00008% distortion ensures filter stages add no measurable harmonic content, while the FET input's high impedance allows large-value precision film capacitors without loading error. With +/-15V supply headroom and 8 MHz bandwidth, Q-damping remains stable and quiet at all audio frequencies.
Recommended
Guitar Effects Pedals and Musical Instrument Electronics
Operating from a single 9V supply (within the 5V-36V single-supply range), the OPA2134 serves as input buffer, clipping-stage amplifier, and output driver in pedals. Musicians favor its transparent, uncolored character versus the brighter TL072. Rail-to-rail biasing at VCC/2 via a divider and coupling capacitors is standard; the low 5 pA bias current permits megaohm input impedances needed for passive pickups.
Recommended
Automotive Infotainment Audio Processing
With the -Q1 quality flow option, the OPA2134UA/2K5-Q1 supports automotive audio signal paths such as line-level preamplification, equalization, and crossovers in head units and amplifiers. The +/-18V dual-supply tolerance accommodates car-audio rails from DC-DC converters, and low distortion (0.00008%) keeps in-cabin sound systems transparent. Pair with TI's automotive DSPs and Class-D amplifiers for a complete signal chain.
Recommended
Test and Measurement Signal Conditioning
In bench instrumentation and audio analyzers, the OPA2134 conditions small AC signals where its 8 nV/sqrt(Hz) noise floor and FET input (5 pA) preserve measurement integrity with high-impedance probes. The 600 V/mV open-loop gain keeps closed-loop gain error below 0.002% at 60 dB, and the wide +/-18V supply range allows conditioning signals approaching professional line levels without input attenuation.
Recommended
Recommended Products Summary
Engineering reference data for OPA2134UA/2K5-Q1 β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | OPA2134UA/2K5 | OPA2132UA/2K5 | OPA2227UA/2K5 | NE5532ADR |
|---|---|---|---|---|---|
| Package | 8-SOIC | 8-SOIC - same | 8-SOIC - same | 8-SOIC - same | 8-SOIC - same |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | STMicroelectronics |
| THD+N | 0.00008% | 0.00008% | 0.0003% | 0.0003% | 0.02% |
| Input Noise | 8 nV/sqrt(Hz) | 8 nV/sqrt(Hz) | 8 nV/sqrt(Hz) | 3 nV/sqrt(Hz) | 5 nV/sqrt(Hz) |
| Input Type / Bias Current | FET, 5 pA | FET, 5 pA | FET, 5 pA | Bipolar, 10 nA | Bipolar, 200 nA |
| Slew Rate | 20 V/us | 20 V/us | 20 V/us | 2.3 V/us | 13 V/us |
| Gain Bandwidth | 8 MHz | 8 MHz | 8 MHz | 8 MHz | 10 MHz |
| Supply Range (dual) | +/-2.5V to +/-18V | +/-2.5V to +/-18V | +/-2.5V to +/-18V | +/-2V to +/-18V | +/-1.5V to +/-15V |
Key Differentiators
- True FET input with 5 pA bias current (vs NE5532ADR)
- Ultra-low 0.00008% THD+N (vs TL072CDT)
- Higher noise than bipolar audio op-amps (vs OPA2227UA/2K5)
Design Notes
Decouple both supply pins with 0.1 uF ceramic capacitors placed within 5 mm of pins 4 and 8, plus a 10 uF bulk capacitor per rail. The OPA2134 drives capacitive loads only marginally well; if driving long shielded cables (>100 pF), isolate with a 50-ohm series resistor or use an inductor-resistor isolation network to preserve phase margin per the TI OPAx134 datasheet.
Keep the feedback loop as short as possible and place gain-setting resistors close to the inverting input. Use a ground plane under the amplifier area; route high-impedance FET input traces away from digital or switching rails to exploit the low 5 pA bias current. On single-supply designs (9V pedals), bias the non-inverting input at mid-supply with a low-noise divider buffered or RC-filtered.
The OPA2134 is not rail-to-rail; output swing stops roughly 3-4 V from either rail at load, so with a 9V single supply the maximum undistorted swing is around 4 Vpp - relevant for pedal designs. Also note its 8 nV/sqrt(Hz) voltage noise is higher than bipolar audio op-amps; for very low source impedances below 1 kohm, the NE5532 achieves lower total noise.
Compliance Information
RoHS compliant per TI product page and DigiKey listing. Standard TI green flow; obtain REACH and conflict-minerals declarations from TI compliance portal.
