Overview
The OPA1604AIPWR, produced by Texas Instruments, is a high-performance, bipolar-input operational amplifier designed for audio applications. It is part of the OPA160x series, which includes the OPA1602 and OPA1604 models. These op amps are renowned for their superior sound quality, ultra-low noise, and low distortion, making them ideal for professional audio equipment and broadcast studio applications.
Key Specifications
| Parameter | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Supply Voltage (VS) | ±2.25 | ±18 | V | ||
| Quiescent Current (IQ) per Channel | IOUT = 0A | 2.6 | 3.2 | mA | |
| Operating Temperature Range | –40 | +85 | °C | ||
| Gain-Bandwidth Product (GBW) | G = +1 | 35 | MHz | ||
| Slew Rate (SR) | G = +1, RL = 2kΩ | 20 | V/μs | ||
| Total Harmonic Distortion + Noise (THD+N) | G = +1, f = 1kHz, VO = 3VRMS | 0.00003% | % | ||
| Open-Loop Gain | 120 | dB | |||
| Output Current | ±30 | mA |
Key Features
- Ultra-Low Noise: 2.5nV/√Hz at 1kHz, making it suitable for low source impedances.
- Ultra-Low Distortion: 0.00003% at 1kHz, ensuring high fidelity audio.
- High Slew Rate: 20V/μs with a 2kΩ load, providing fast signal response.
- Wide Bandwidth: 35MHz (G = +1), supporting a broad range of audio frequencies.
- High Open-Loop Gain: 120dB, offering excellent signal amplification.
- Rail-to-Rail Output Swing: Within 600mV of the supply rails, maximizing dynamic range.
- Unity Gain Stable: Stable operation at unity gain, with excellent dynamic behavior.
- Low Quiescent Current: 2.6mA per channel, efficient power consumption.
- Wide Supply Range: ±2.25V to ±18V, flexible for various power supply configurations.
- Dual and Quad Versions Available: Offering flexibility in design and application.
Applications
- Professional Audio Equipment: Ideal for high-quality audio amplification and processing.
- Broadcast Studio Equipment: Suitable for studio-grade audio systems requiring low noise and distortion.
- Analog and Digital Mixers: Enhances audio quality in mixing consoles and audio processing units.
- Audio Interfaces and Preamps: Used in various audio interface and preamplifier designs for professional and consumer applications.
Q & A
- What is the typical noise density of the OPA1604?
The OPA1604 has a typical noise density of 2.5nV/√Hz at 1kHz.
- What is the slew rate of the OPA1604?
The slew rate of the OPA1604 is 20V/μs with a 2kΩ load.
- What is the gain-bandwidth product of the OPA1604?
The gain-bandwidth product (GBW) of the OPA1604 is 35MHz at a gain of +1.
- What is the maximum output current of the OPA1604?
The OPA1604 can drive up to ±30mA of output current.
- What is the operating temperature range of the OPA1604?
The OPA1604 operates over a temperature range of –40°C to +85°C.
- Is the OPA1604 unity-gain stable?
Yes, the OPA1604 is unity-gain stable.
- What is the quiescent current of the OPA1604 per channel?
The quiescent current of the OPA1604 is 2.6mA per channel.
- What are the typical applications of the OPA1604?
The OPA1604 is typically used in professional audio equipment, broadcast studio equipment, analog and digital mixers, and other high-quality audio applications.
- What is the supply voltage range of the OPA1604?
The OPA1604 operates from ±2.25V to ±18V supply voltage.
- Does the OPA1604 have rail-to-rail output swing?
Yes, the OPA1604 has a rail-to-rail output swing within 600mV of the supply rails.
