EmbeddedRelated.com
    Parts    OPA1678IDR
OPA1678IDR

TIOPA1678IDR

Texas Instruments
Audio Amplifier 2 Circuit Rail-to-Rail 8-SOIC
Active11,092 in stock
Datasheet Digi-Key Compare Prices

Overview

The OPA1678IDR is a dual-channel, low-noise audio operational amplifier designed for high-performance signal chains. It features a rail-to-rail output and operates over a wide supply range from 4.5V to 36V, making it suitable for both professional and consumer audio gear. With a low input bias current of 10 pA and a 16 MHz gain bandwidth, it provides high fidelity in sensitive analog front-ends.

Why Choose This Part

The OPA1678IDR offers an excellent balance of low noise (4.5 nV/rtHz) and low power consumption (2mA per channel). Its high slew rate of 9V/us ensures minimal signal distortion across the audio frequency spectrum, while the 36V maximum supply voltage allows for significant headroom in professional applications.

Applications

Preamplifier Stages
Ideal for low-noise amplification of microphone or instrument signals in mixing consoles and recording interfaces.
Active Filter Design
The 16 MHz bandwidth and low distortion allow for precise audio filtering and equalization circuits.
DAC Output Buffers
Used as an I/V converter or output buffer for high-resolution audio digital-to-analog converters.
Headphone Amplifiers
Supports rail-to-rail output swing to maximize dynamic range in compact or portable audio designs.

Key Specifications

Slew Rate 9V/us
Output Type Rail-to-Rail
Mounting Type Surface Mount
Amplifier Type Audio
Package / Case 8-SOIC (0.154", 3.90mm Width)
Current - Supply 2mA (x2 Channels)
Number of Circuits 2
Current - Input Bias 10 pA
Operating Temperature -40degC ~ 85degC
Gain Bandwidth Product 16 MHz
Voltage - Input Offset 500 uV
Supplier Device Package 8-SOIC
Current - Output / Channel 50 mA
Voltage - Supply Span (Max) 36 V
Voltage - Supply Span (Min) 4.5 V

Getting Started

To evaluate this part, designers can use the DIP-ADAPTER-EVM or similar SOIC-to-DIP breakout boards for breadboard prototyping. Ensure proper decoupling with 0.1uF ceramic capacitors placed as close to the supply pins as possible to maintain stability and low noise floors. Simulation can be performed using TI's Pspice or TINA-TI models to verify circuit stability and frequency response.

OPA1678 Family

Comparing specs that differ across variants. The current part is highlighted.

Part Number Package Stock
OPA1678IDR (this part) SOIC-8 11,092
OPA1678IDRGR WFDFN-8 3,041

Also Consider

NE5532ADR TITexas Instruments - A cost-effective, classic dual audio op-amp for designs that do not require rail-to-rail output or extremely low input bias.