Texas Instruments RC4558DGKRG4

Overview

RC4558DGKRG4 from Texas Instruments is a dual general-purpose operational amplifier in an 8-pin VSSOP package, featuring 4MHz gain-bandwidth product, 6.5nV/√Hz input voltage noise at 10kHz, 0.0001% THD+N at 1kHz, ±15V supply operation, and internal frequency compensation for unity-gain stability. It serves as a low-noise, low-distortion signal conditioning stage in professional audio front-ends and consumer audio amplification circuits.

For engineers reviewing the RC4558DGKRG4 datasheet, RC4558DGKRG4 pinout, RC4558DGKRG4 application, or RC4558DGKRG4 equivalent, key selection criteria include its wide common-mode input range (±14V), crosstalk attenuation (120dB), slew rate (2.2V/μs), output swing capability (±13.8V into 2kΩ), and thermal performance (R_θJA = 164.8°C/W) in the DGK package.

Technical Context

The RC4558DGKRG4 integrates two independent high-fidelity op-amps on a single die with matched gain and phase characteristics, enabling precise differential signal processing without external trimming. Its internal frequency compensation eliminates need for external compensation networks across all closed-loop gains ≥1.

Designed for dual-supply operation (±5V to ±15V), it delivers rail-compatible common-mode input range (±14V) and avoids latch-up-critical for voltage-follower configurations in audio line drivers and active filters where input signals approach supply rails.

Key Specifications

Pinout & Package

RC4558DGKRG4 is housed in an 8-pin VSSOP (DGK) package measuring 3mm × 4.9mm, optimized for space-constrained PCB layouts in compact audio modules.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual general-purpose operational amplifier applications.

Compared with NE5532DR and LM833N, RC4558DGKRG4 offers superior latch-up immunity and lower quiescent current in a thermally optimized VSSOP package-making it optimal for space-constrained, cost-sensitive consumer audio products operating at 0°C to 70°C.

Availability

RC4558DGKRG4 is available at Aetrix Electronics and suitable for AV receivers, professional audio mixers, and wireless speakers requiring stable component supply, consistent parametric performance across production lots, and long-term availability for consumer electronics programs.

Supply support for RC4558DGKRG4 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Texas Instruments is a global semiconductor company headquartered in Dallas, Texas, delivering analog and embedded processing solutions for industrial, automotive, and consumer markets since 1930.

The RC4558DGKRG4 belongs to TI's legacy general-purpose op-amp product line, engineered specifically for high-fidelity audio signal conditioning with emphasis on low noise, low distortion, and robust DC precision in dual-channel configurations.

FAQ

What is the maximum supply voltage for RC4558DGKRG4?

The absolute maximum supply voltage for RC4558DGKRG4 is ±18V, but the recommended operating range is ±5V to ±15V. Operation beyond ±15V risks exceeding thermal limits in the DGK package (R_θJA = 164.8°C/W), and sustained use above ±15V may reduce long-term reliability. The RC4558DGKRG4 achieves optimal THD+N and output swing performance within the ±15V range.

Does RC4558DGKRG4 require external compensation capacitors?

No, RC4558DGKRG4 does not require external compensation capacitors. It features internal frequency compensation designed for stable unity-gain operation across its full 4MHz gain-bandwidth product. This eliminates the need for external components in standard inverting, noninverting, and voltage-follower configurations-reducing design complexity and board area in RC4558DGKRG4-based audio circuits.

What is the input common-mode voltage range of RC4558DGKRG4?

The input common-mode voltage range of RC4558DGKRG4 is ±14V when operated at ±15V supplies, meaning inputs can swing from –14V to +14V relative to ground. This wide range supports DC-coupled interfaces in active filters and line drivers where input signals approach supply rails-enabling direct connection to DAC outputs or sensor front-ends without level-shifting circuitry in RC4558DGKRG4 implementations.

How does RC4558DGKRG4 compare to RC4558P in terms of thermal performance?

RC4558DGKRG4 (VSSOP-8) has a junction-to-ambient thermal resistance (R_θJA) of 164.8°C/W, significantly higher than RC4558P (PDIP-8) at 106°C/W. This means RC4558DGKRG4 runs hotter under identical load conditions. Designers must ensure adequate copper pour and airflow around the DGK package, especially when sourcing ±125mA peak output current, to maintain safe junction temperatures below 150°C in RC4558DGKRG4 applications.

Is RC4558DGKRG4 suitable for single-supply operation?

Yes, RC4558DGKRG4 supports single-supply operation with appropriate biasing-its input common-mode range extends to within 1V of the negative rail and 1V of the positive rail. For example, with a +30V single supply, inputs can operate from 1V to 29V. However, output swing remains asymmetric unless the reference midpoint is actively established; RC4558DGKRG4 is most commonly deployed in dual-supply configurations for optimal audio fidelity and headroom.