Overview
The OPA134PA, part of the OPAx134 series from Texas Instruments, is an ultra-low distortion, low-noise operational amplifier specifically designed for audio applications. It features a true FET input stage, which provides excellent sound quality and high speed for exceptional audio performance. This amplifier is suitable for a wide range of demanding applications due to its high output drive capability, excellent DC performance, and wide output swing, allowing increased headroom within 1V of the rails. The OPA134PA is easy to use and free from phase-inversion and overload problems commonly found in other FET-input operational amplifiers.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Supply Voltage (VS) | ±2.5 | - | ±18 | V |
| Input Voltage | (V–) – 0.5 | - | (V+) + 0.5 | V |
| Input Bias Current (IB) | - | 5 | - | pA |
| Slew Rate | - | 20 | - | V/µs |
| Bandwidth | - | 8 | - | MHz |
| Open-Loop Gain | 104 | - | 120 | dB |
| Output Voltage Swing (RL = 2kΩ) | (V+) – 1.5 | - | (V–) + 1.2 | V |
| Operating Temperature | -40 | - | 125 | °C |
| Junction Temperature | - | - | 150 | °C |
| Short-Circuit Current | -30 | - | 36 | mA |
Key Features
- Ultra-low distortion: 0.00008%
- Low noise: 8nV/√Hz
- True FET-input with low input bias current (IB = 5pA)
- High speed: Slew rate of 20V/µs and bandwidth of 8MHz
- High open-loop gain: 120dB
- Wide supply range: ±2.5V to ±18V
- Wide output swing to within 1V of the rails
- Unity-gain stable and excellent dynamic behavior over a wide range of load conditions
- Available in single, dual, and quad versions
- Free from phase-inversion and overload problems
Applications
- Professional audio and music
- Line drivers and line receivers
- Multimedia audio
- Active filters
- Preamplifiers and integrators
- Crossover networks
Q & A
- What is the primary application of the OPA134PA?
The OPA134PA is primarily used in audio applications, including professional audio, line drivers, line receivers, multimedia audio, active filters, preamplifiers, integrators, and crossover networks.
- What are the key features of the OPA134PA?
The key features include ultra-low distortion, low noise, true FET-input, high speed, high open-loop gain, wide supply range, and wide output swing.
- What is the slew rate of the OPA134PA?
The slew rate is 20V/µs.
- What is the bandwidth of the OPA134PA?
The bandwidth is 8MHz.
- What is the input bias current of the OPA134PA?
The input bias current is 5pA.
- What is the operating temperature range of the OPA134PA?
The operating temperature range is -40°C to 125°C.
- Is the OPA134PA free from phase-inversion problems?
Yes, the OPA134PA is free from phase-inversion and overload problems.
- What are the available package types for the OPA134PA?
The OPA134PA is available in 8-pin DIP and SO-8 surface-mount packages.
- What is the maximum output voltage swing of the OPA134PA?
The output voltage swing is to within 1V of the rails.
- Is the OPA134PA unity-gain stable?
Yes, the OPA134PA is unity-gain stable and provides excellent dynamic behavior over a wide range of load conditions.
