Texas Instruments LM833DGKT

Overview

LM833DGKT from Texas Instruments is a dual high-speed audio operational amplifier optimized for preamplifier and line-level stages in HiFi, PCM, and RIAA phono systems. 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 signal conditioning in professional audio front-ends.

For engineers reviewing the LM833DGKT datasheet, LM833DGKT pinout, LM833DGKT application, or LM833DGKT equivalent, this page provides verified specifications, MSOP-8 package details, dual-channel audio amplifier functional context, real-world design constraints (e.g., capacitive load stability, thermal derating), and validated alternative options for preamp, filter, and signal-chain amplification roles.

Technical Context

The LM833DGKT implements two independent high-fidelity op-amps in a single monolithic die, each featuring bipolar input stage architecture with matched NPN transistors for low input offset voltage (0.15 mV typ) and low drift (2 μV/°C). Its internal compensation ensures stable unity-gain operation with ≥40° phase margin into 100 pF loads.

It operates from dual supplies of ±5 V to ±18 V (36 V total), supports rail-to-rail input common-mode range (±14 V), and maintains symmetrical sourcing/sinking capability (±29 mA short-circuit current). The device exhibits excellent AC open-loop gain (800 at 20 kHz) and high CMRR (100 dB typ), critical for rejecting power-supply and ground-noise coupling in sensitive audio paths.

Key Specifications

Pinout & Package

The LM833DGKT is housed in an 8-pin MSOP (DGK) package measuring 3.0 mm × 3.0 mm × 1.0 mm, with 0.65 mm pitch and exposed thermal pad for enhanced power dissipation in compact audio modules.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual audio operational amplifier applications.

Compared with NE5532DR and RC4558IDR, the LM833DGKT offers superior small-signal linearity (0.002% THD), faster transient response (7 V/μs), and thermal-optimized packaging - making it the preferred choice for high-resolution audio signal paths where measurement-grade accuracy and PCB area efficiency are jointly critical.

Availability

LM833DGKT is available at Aetrix Electronics and suitable for HiFi audio system equipment, RIAA phono preamplifier designs, and professional microphone preamplifier circuits requiring stable component supply, long-term manufacturability, and consistent parametric performance across production batches.

Supply support for LM833DGKT 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 conditioning ICs.

The LM833 product line was engineered specifically for demanding audio applications - delivering low-noise, low-distortion, high-slew-rate dual op-amps that meet the stringent dynamic range and fidelity requirements of professional recording, broadcast, and high-end consumer audio systems.

FAQ

What is the maximum supply voltage rating for the LM833DGKT?

The LM833DGKT has an absolute maximum supply voltage rating of ±18 V (36 V total across VCC+ and VCC−). Operation beyond this limit risks permanent damage. For reliable long-term use, TI recommends staying within the recommended operating range of ±5 V to ±18 V, with thermal derating applied above 70°C ambient temperature per the R_θJA = 172°C/W specification for the DGK package. The LM833DGKT must never be operated with asymmetric supplies exceeding these limits.

Does the LM833DGKT support single-supply operation?

Yes, the LM833DGKT can operate from a single supply, but its input common-mode range does not extend to the negative rail - it requires a minimum of ~1.5 V headroom below VCC−. For true single-supply applications (e.g., 0 V to +12 V), external biasing of inputs to mid-supply (e.g., via resistor divider and decoupling capacitor) is mandatory. The LM833DGKT is primarily optimized for dual-supply audio systems; its specified performance (THD, noise, swing) assumes symmetric ±V_CC operation.

What is the thermal resistance (R_θJA) of the LM833DGKT in its MSOP-8 package?

The LM833DGKT in the DGK (MSOP-8) package has a junction-to-ambient thermal resistance (R_θJA) of 172°C/W, as measured per JESD 51-7 with standard PCB mounting (2-layer board, 1-in² copper pour). This value assumes the exposed thermal pad is soldered to a solid ground plane. Without proper thermal pad connection, R_θJA degrades significantly. At 2.5 mA per channel (5 mA total), power dissipation is ~75 mW, resulting in ~13°C junction rise above ambient - well within safe operating limits for continuous operation.

How does the LM833DGKT compare to the NE5532 in terms of audio performance?

The LM833DGKT exceeds the NE5532 in key audio metrics: it delivers 16 MHz GBW (vs 10 MHz), 7 V/μs slew rate (vs 9 V/μs - but with lower distortion at high frequencies), and 0.002% THD (vs 0.005%). Its input voltage noise is identical (4.5 nV/√Hz), but LM833DGKT achieves tighter input offset voltage (0.15 mV typ vs 0.5 mV typ) and better phase margin into capacitive loads. Unlike the NE5532, the LM833DGKT is qualified in thermally enhanced MSOP-8, enabling higher-density audio PCB layouts without thermal compromise.

Can the LM833DGKT drive 600 Ω professional audio loads directly?

Yes, the LM833DGKT specifies output voltage swing down to ±10.7 V into 600 Ω (at ±15 V supply), delivering >21 V_PP usable signal range. However, sustained 600 Ω loading increases power dissipation and junction temperature; thermal design must ensure T_J stays below 125°C. For continuous high-level operation, pairing the LM833DGKT with a discrete output buffer stage is recommended. The LM833DGKT's 120 kHz power bandwidth (THD ≤1%) confirms clean full-scale delivery into reactive 600 Ω loads typical of balanced audio transformers.