Texas Instruments LM833DGKR

Overview

LM833DGKR from Texas Instruments is a dual high-speed audio operational amplifier designed for preamplification and signal conditioning in HiFi, PCM, and RIAA phono stages. It delivers 16 MHz gain-bandwidth product, 7 V/μs slew rate, 0.002% THD at 20 Hz–20 kHz, ±14.6 V output swing (±15 V supply), and 4.5 nV/√Hz input voltage noise - enabling low-distortion, wide-dynamic-range analog audio paths.

For engineers reviewing the LM833DGKR datasheet, LM833DGKR pinout, LM833DGKR application, or LM833DGKR equivalent, key selection criteria include dual-channel rail-to-rail output capability under ±5 V to ±18 V supplies, verified crosstalk rejection >120 dB, and MSOP-8 packaging optimized for space-constrained audio PCB layouts.

Technical Context

The LM833DGKR integrates two independent high-fidelity op-amps sharing a common substrate but with >120 dB inter-channel isolation. Its internal architecture features matched transistor pairs for low input offset (0.15 mV typ), low bias current (300 nA typ), and symmetrical sink/source output drive (±29 mA short-circuit current).

It operates in dual-supply mode only (no single-supply biasing), supports common-mode input range up to ±14 V, maintains stable phase margin (>40°) with 100 pF capacitive loads, and achieves 800 V/V open-loop AC gain at 20 kHz - confirming suitability for closed-loop gain configurations up to 40 dB without compensation.

Key Specifications

Pinout & Package

LM833DGKR uses an 8-pin MSOP (DGK) package measuring 3.0 mm × 3.0 mm × 1.0 mm, with exposed thermal pad (non-electrical), gull-wing leads, and 0.65 mm pitch - compatible with fine-pitch reflow assembly and compact audio module designs.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual audio op-amp applications.

Compared with NE5532DR and OPA2134PA, LM833DGKR provides the optimal balance of low voltage noise, dual-channel integration, MSOP-8 footprint, and proven RIAA phono performance - making it the preferred choice for space-constrained, high-fidelity audio front-ends requiring <0.002% THD and ≤4.5 nV/√Hz noise.

Availability

LM833DGKR is available at Aetrix Electronics and suitable for HiFi audio system equipment, RIAA phono preamplifier designs, and microphone preamplifier circuits requiring stable component supply, long-term production continuity, and TI-qualified industrial temperature grade (–40°C to +85°C).

Supply support for LM833DGKR 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 leader specializing in analog and embedded processing technologies, with decades of expertise in high-performance audio signal chain components.

The LM833 product line was engineered specifically for professional and consumer audio applications demanding low THD, wide bandwidth, and dual-channel precision - targeting phono preamps, active crossovers, and studio-grade line-level signal conditioning.

FAQ

What supply voltage range does the LM833DGKR support?

The LM833DGKR operates from ±5 V to ±18 V dual supplies, with recommended conditions of ±12 V or ±15 V for audio applications. Absolute maximum ratings allow ±18 V, but sustained operation above ±15 V requires thermal derating per the 172°C/W junction-to-ambient thermal resistance of the DGK package. The LM833DGKR does not support true single-supply operation - VCC– must be actively biased below ground.

Does the LM833DGKR have rail-to-rail output capability?

No, the LM833DGKR does not feature rail-to-rail output. Its typical output swing is –14.6 V to +14.1 V with ±15 V supplies and a 10 kΩ load, representing ~1.4 V saturation margin from each rail. This limitation is inherent to its bipolar input/output stage and must be accounted for in headroom calculations for 24-bit audio systems. The LM833DGKR output stage delivers symmetrical sink and source current (±29 mA short-circuit), ensuring consistent clipping behavior.

Can the LM833DGKR be used in single-supply configurations?

The LM833DGKR is specified and characterized exclusively for dual-supply operation. While it may function with a split virtual ground (e.g., using resistive divider + buffer), TI does not guarantee performance outside the ±5 V to ±18 V dual-rail specification. Input common-mode range extends to within 1 V of either rail, but output swing remains asymmetric near ground - making it unsuitable for true single-supply line drivers or ADC buffers without level-shifting circuitry. For single-supply designs, consider purpose-built alternatives like the TLV2462.

What is the maximum capacitive load the LM833DGKR can drive stably?

The LM833DGKR maintains stability with up to 100 pF capacitive loads at unity gain, as confirmed by phase margin measurements of ≥40° in the datasheet. Driving larger loads (e.g., cables or ADC inputs) requires isolation resistors (≥100 Ω) in series with the output to prevent peaking or oscillation. Layout best practices - including short traces, local 0.1 µF bypass caps at each supply pin, and ground plane under the DGK thermal pad - are essential to preserve this stability margin in production PCBs.

How does the LM833DGKR compare to the NE5532 in audio performance?

The LM833DGKR offers superior gain-bandwidth (16 MHz vs 10 MHz) and lower input voltage noise (4.5 nV/√Hz vs 5 nV/√Hz) compared to the NE5532, while matching its 0.002% THD spec. However, the NE5532 provides higher output current (±38 mA vs ±29 mA) and better input bias current specs for high-impedance sources. Both are pin-compatible in SOIC-8, but the LM833DGKR's MSOP-8 package saves 45% board area - a decisive advantage in portable audio and modular synthesizer designs where space is constrained.