Low distortion (-120 dB), low noise (4.5nV/rtHz), dual audio op amp
Product details
Parameters
Package | Pins | Size
Features
- Low noise: 4.5 nV/√Hz at 1 kHz
- Low distortion: 0.0001% at 1 kHz
- High open-loop gain: 114 dB
- High common-mode rejection: 110 dB
- Low quiescent current:
- 2 mA per channel
- Low input bias current: 10 pA (typical)
- Slew rate: 9 V/µs
- Wide gain bandwidth: 16 MHz (G = 1)
- Unity-gain stable
- Rail-to-rail output
- Wide supply range:
- ±2.25 V to ±18 V, or 4.5 V to 36 V
- Dual-channel and quad-channel versions
- Small package sizes:
- Dual-channel: SO-8, MSOP-8, SON-8
- Quad-channel: SO-14, TSSOP-14, QFN-16
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Description
The OPA1678 (dual-channel) and OPA1679 (quad-channel) operational amplifiers offer higher system-level performance over legacy op amps commonly used in audio circuitry. The OPA167x amplifiers achieve a low 4.5-nV/√Hz noise density and low distortion of 0.0001% at 1 kHz, which improves audio signal fidelity. They also offer rail-to-rail output swing to within 800 mV with a 2-kΩ load, which increases headroom and maximizes dynamic range.
The OPA1678 and OPA1679 operate over a very wide supply range of ±2.25 V to ±18 V or (4.5 V to 36 V) on only 2 mA of supply current to accommodate the power supply constraints of many types of audio products. These op amps are unity-gain stable and have excellent dynamic behavior over a wide range of load conditions allowing them to be used in many audio circuits.
The OPA167x amplifiers use completely independent internal circuitry for lowest crosstalk and freedom from interactions between channels, even when overdriven or overloaded.
The OPA167x temperature ranges are specified from –40°C to +85°C.
Technical documentation
| Type | Title | Date | |
|---|---|---|---|
| * | Datasheet | OPA167x Low-Distortion Audio Operational Amplifiers datasheet (Rev. C) | Jun. 24, 2019 |
| Technical articles | Get started with smart home audio design | May 09, 2019 | |
| Technical articles | No headroom, no problem: buffering and filtering an audio signal chain in low-voltage systems | Apr. 11, 2019 | |
| Application notes | Active-filtering circuit for audio DACs | Jan. 16, 2019 | |
| Application notes | Phantom Power with Operational Amplifiers (Rev. A) | Nov. 09, 2018 | |
| Technical articles | Forget the tiny homes craze – Have you heard about tiny inductors for automotive Class-D amplifiers? | Oct. 12, 2017 | |
| Technical articles | “Trust, but verify” SPICE model accuracy, part 3: slew rate and input clamping diodes | Sep. 18, 2017 | |
| White papers | The Signal e-book: A compendium of blog posts on op amp design topics | Mar. 28, 2017 | |
| Application notes | Compensate Transimpedance Amplifiers Intuitively (Rev. A) | Mar. 30, 2005 |
Design & development
For additional terms or required resources, click any title below to view the detail page where available.Hardware development
Description
Speed up your op amp prototyping and testing with the DIP-Adapter-EVM, which provides a fast, easy and inexpensive way to interface with small, surface-mount ICs. You can connect any supported op amp using the included Samtec terminal strips or wire them directly to existing circuits.
The (...)
Features
- Simplifies prototyping of SMT IC’s
- Supports 6 common package types
- Low Cost
Design tools & simulation
Features
- Leverages Cadence PSpice Technology
- Preinstalled library with a suite of digital models to enable worst-case timing analysis
- Dynamic updates ensure you have access to most current device models
- Optimized for simulation speed without loss of accuracy
- Supports simultaneous analysis of multiple products
- (...)
Features
- Expedites circuit design with analog-to-digital converters (ADCs) and digital-to-analog converters (DACs)
- Noise calculations
- Common unit translation
- Solves common amplifier circuit design problems
- Gain selections using standard resistors
- Filter configurations
- Total noise for common amplifier configurations
- (...)
CAD/CAE symbols
| Package | Pins | Download |
|---|---|---|
| SOIC (D) | 8 | View options |
| SON (DRG) | 8 | View options |
| VSSOP (DGK) | 8 | View options |
Ordering & quality
Support & training
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