Overview
The OPA1692IDR from Texas Instruments is a SoundPlus™ Low-Power, Low-Noise, High-Performance Dual Bipolar-Input Audio Operational Amplifier. This device is part of the OPA169x family, known for its excellent dynamic behavior and low distortion. The OPA1692 is unity-gain stable and operates over a wide supply range of ±1.75 V to ±18 V, or 3.5 V to 36 V, making it versatile for various audio applications. It features a very low noise input stage with a folded cascode and a rail-to-rail output stage, enhancing its performance in audio circuits.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Voltage Supply Range | ±1.75 | ±18 | V | |
| Input Offset Voltage | 300 | 550 | 600 | nA |
| Input Bias Current | ±2 | ±20 | nA | |
| Common-Mode Voltage Range | (V–) + 1.5 | (V+) – 0.5 | V | |
| Open-Loop Gain | 110 | 120 | 140 | dB |
| Output Current | ±50 | mA | ||
| Quiescent Current (per channel) | 650 | 750 | 975 | µA |
| Operating Temperature Range | –40 | 125 | °C | |
| Package Types | VSSOP (8), SOIC (8) |
Key Features
- Low noise and low distortion, making it suitable for high-performance audio applications.
- Wide supply range: ±1.75 V to ±18 V or 3.5 V to 36 V.
- Unity-gain stable with excellent dynamic behavior over a wide range of load conditions.
- Rail-to-rail output stage and a very low noise input stage with a folded cascode.
- Proprietary distortion reduction technology to achieve lower distortion without increasing power supply current.
- High common-mode rejection ratio (CMRR) and power supply rejection ratio (PSRR).
- Capable of driving capacitive loads up to 200 pF.
- Operating temperature range of –40°C to 125°C.
Applications
- Audiophile audio equipment.
- Professional audio systems.
- High-fidelity sound systems.
- Audio preamplifiers for 3-wire electret microphones.
- Active filters and buffers in audio circuits.
- General-purpose analog signal processing where low noise and low distortion are critical.
Q & A
- What is the supply voltage range for the OPA1692?
The OPA1692 operates over a wide supply range of ±1.75 V to ±18 V, or 3.5 V to 36 V.
- What is the typical quiescent current per channel for the OPA1692?
The typical quiescent current per channel is 650 µA to 750 µA.
- What is the maximum output current of the OPA1692?
The maximum output current is ±50 mA.
- What is the operating temperature range of the OPA1692?
The operating temperature range is –40°C to 125°C.
- What are the package types available for the OPA1692?
The OPA1692 is available in VSSOP (8) and SOIC (8) packages.
- What is the common-mode voltage range for the OPA1692?
The common-mode voltage range is (V–) + 1.5 V to (V+) – 0.5 V.
- Does the OPA1692 have rail-to-rail output capability?
Yes, the OPA1692 features a rail-to-rail output stage.
- What is the typical open-loop gain of the OPA1692?
The typical open-loop gain is 120 dB.
- Can the OPA1692 drive capacitive loads?
Yes, the OPA1692 can drive capacitive loads up to 200 pF.
- What are some typical applications of the OPA1692?
Typical applications include audiophile audio equipment, professional audio systems, and high-fidelity sound systems.
