Overview
The OPA134UA/2K5E4, part of the OPAx134 series from Texas Instruments, is an ultra-low distortion, low-noise operational amplifier specifically designed for high-performance audio applications. This device features a true FET input stage, which provides excellent sound quality and high speed, making it ideal for demanding audio circuits. The OPA134UA is available in an 8-pin SOIC package and is part of the SoundPlus™ family, known for its exceptional audio performance and ease of use.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Supply Voltage | ±2.5 | ±18 | V | |
| Input Voltage | (V–) – 0.5 | (V+) + 0.5 | V | |
| Input Bias Current | 5 | pA | ||
| Slew Rate | 20 | V/µs | ||
| Bandwidth | 8 | MHz | ||
| Open-Loop Gain | 104 | 120 | dB (RL = 2kΩ) | |
| Output Voltage Swing | (V–) + 1.2 | (V+) – 1.5 | V (RL = 2kΩ) | |
| Short-Circuit Current | ±36 | mA | ||
| Operating Temperature Range | –40 | 85 | °C | |
| Package Type | SOIC (8-pin) |
Key Features
- Excellent sound quality
- Ultra-low distortion: 0.00008%
- Low noise: 8nV/√Hz
- True FET-input: IB = 5pA
- High speed: Slew rate of 20V/µs and bandwidth of 8MHz
- High open-loop gain: 120dB (RL = 2kΩ)
- Wide supply range: ±2.5V to ±18V
- Single, dual, and quad versions available
- Wide output swing to within 1V of the rails
- Unity-gain stable and excellent dynamic behavior over a wide range of load conditions
Applications
- Professional audio and music
- Line drivers and line receivers
- Multimedia audio
- Active filters
- Preamplifiers and integrators
- Crossover networks
Q & A
- What is the typical distortion of the OPA134UA?
The OPA134UA has an ultra-low distortion of 0.00008%.
- What is the input bias current of the OPA134UA?
The input bias current is 5pA.
- What is the slew rate and bandwidth of the OPA134UA?
The slew rate is 20V/µs, and the bandwidth is 8MHz.
- What is the operating temperature range of the OPA134UA?
The operating temperature range is –40°C to 85°C.
- What are the available package types for the OPA134UA?
The OPA134UA is available in an 8-pin SOIC package.
- What is the typical output voltage swing of the OPA134UA?
The output voltage swing is to within 1V of the rails (e.g., (V–) + 1.2V to (V+) – 1.5V for RL = 2kΩ).
- What are some common applications of the OPA134UA?
Common applications include professional audio, line drivers, multimedia audio, active filters, preamplifiers, and crossover networks.
- Is the OPA134UA unity-gain stable?
- What is the short-circuit current of the OPA134UA?
The short-circuit current is ±36mA.
- What is the noise level of the OPA134UA?
The noise level is 8nV/√Hz.
