Texas Instruments LM833D

Overview

LM833D from STMicroelectronics is a dual low-noise operational amplifier optimized for high-fidelity audio signal conditioning. It delivers 4.5 nV/√Hz input voltage noise, 15 MHz gain bandwidth, 7 V/µs slew rate, 0.002% THD, and operates from ±2.5 V to ±15 V supply rails. It is used in stereo preamplifier stages, active filters, and line-level audio processing circuits.

For engineers reviewing the LM833D datasheet, LM833D pinout, LM833D application, or LM833D equivalent, key selection criteria include input noise density, channel separation (120 dB), phase margin (60°), output swing capability (±13.9 V into 10 kΩ), and SO-8 thermal performance under continuous audio load conditions.

Technical Context

The LM833D integrates two matched JFET-input op-amp cores on a single die, enabling precise dual-channel amplification without inter-channel crosstalk degradation. Its internal compensation ensures unconditional stability with ≥60° phase margin at unity gain and supports closed-loop gains ≥10 without external compensation.

It features rail-to-rail input common-mode range (±14 V) and output swing limited only by headroom (±13.9 V into 10 kΩ). The device uses PNP input transistors with built-in ESD protection (2 kV HBM), and its bias current (300–1000 nA) and offset voltage (0.3–5 mV) are specified over –40°C to +105°C.

Key Specifications

Pinout & Package

LM833D is housed in an SO-8 surface-mount plastic micropackage (ECOPACK® compliant), measuring 4.90 mm × 6.00 mm × 1.25 mm (max height), with 1.27 mm lead pitch and gull-wing leads.

Key Features

Applications

Equivalent & Alternatives

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

Compared with NE5532DR and OPA2134PA, LM833D offers the best balance of ultra-low voltage noise, proven ESD robustness, and tight channel matching-making it optimal for new dual-channel audio designs where SNR and manufacturability are co-prioritized.

Availability

LM833D is available at Aetrix Electronics and suitable for professional audio mixer channel strips, Hi-Fi stereo preamplifiers, and active crossover networks requiring stable component supply across multi-year production cycles.

Supply support for LM833D 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

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing analog, microcontroller, power, and sensor solutions for industrial, automotive, and consumer markets.

The LM833 belongs to ST's precision analog op-amp product line, engineered specifically for high-fidelity audio signal chains where low noise, low distortion, and channel matching are essential design requirements.

FAQ

What is the maximum safe operating supply voltage for LM833D?

The absolute maximum supply voltage is ±18 V or +36 V total, but the recommended operating range is ±2.5 V to ±15 V. Operation beyond ±15 V risks exceeding junction temperature limits under load and may degrade long-term reliability, especially in SO-8 packages due to thermal resistance constraints.

Can LM833D drive 600 Ω professional audio loads directly?

No - LM833D is not rated for 600 Ω loads. Its output swing drops to ±10 V into 600 Ω (per Figure 3), and sustained current exceeds safe limits. It must interface through a dedicated line driver (e.g., THAT 1646) or transformer for true 600 Ω bridging. Use only with ≥2 kΩ loads for full specification compliance.

Does LM833D require external frequency compensation?

No - LM833D is internally compensated for unity-gain stability, with guaranteed 60° phase margin at AV = 1. External compensation is unnecessary for gains ≥1, including voltage followers and active filters. Compensation capacitors may be added only for specialized high-speed configurations outside datasheet-specified conditions.

How does LM833D's channel separation compare to LM833N in DIP8 package?

Channel separation is identical (120 dB) for both LM833D and LM833N, as it is determined by die-level substrate isolation and layout, not package type. However, SO-8's lower parasitic capacitance improves high-frequency crosstalk rejection above 100 kHz compared to DIP8's longer lead inductance and stray coupling paths.