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Texas Instruments LM833MX
- Part No.:
- LM833MX
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM833MX.pdf
- Description:
- IC AUDIO 2 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,782
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Product details
Overview
LM833MX from Texas Instruments is a dual general-purpose audio operational amplifier optimized for preamp and high-level stages in PCM and HiFi systems, featuring 7 V/μs slew rate (typ), 15 MHz gain bandwidth (typ), and 0.002% distortion at 20–20 kHz. It delivers low input noise voltage (4.5 nV/√Hz) and wide dynamic range (>140 dB) in an SOIC-8 package.
For engineers reviewing the LM833MX datasheet, LM833MX pinout, LM833MX application, or LM833MX equivalent, this page provides verified technical context, real-world design meaning of key specs, validated pin functions, audio-specific application cards, and two confirmed alternative parts with documented functional and application differences.
Technical Context
The LM833MX employs internally compensated bipolar circuitry enabling stable operation at unity gain and all closed-loop gains without external compensation. Its high phase margin (60°) and low distortion support high-fidelity signal conditioning in both inverting and non-inverting configurations.
Designed specifically for audio signal paths, it features RIAA-compliant noise performance (1.4 μV RIAA-weighted), wide power bandwidth (120 kHz at 27 Vpp), and robust capacitive load drive capability up to 50 pF without stability degradation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Slew Rate | 7 V/μs typical - enables clean reproduction of fast transients in audio waveforms without slewing-induced distortion |
| Gain Bandwidth | 15 MHz typical - supports stable high-gain amplification across full audio band and beyond |
| Input Noise Voltage | 4.5 nV/√Hz at 1 kHz - preserves signal integrity in low-level microphone and phono preamp stages |
| Total Harmonic Distortion | 0.002% at 20–20 kHz - meets HiFi-grade linearity requirements for critical listening applications |
| Phase Margin | 60° - ensures unconditional stability with minimal peaking in feedback networks |
| Supply Voltage Range | ±15 V max - compatible with standard dual-rail audio supply architectures |
| Operating Temperature | −40°C to +85°C - suitable for consumer and industrial audio equipment operating in ambient environments |
Pinout & Package
LM833MX is housed in an 8-pin SOIC (D) package, 3.9 mm × 4.9 mm body size, 1.75 mm maximum height, RoHS-compliant with Sn lead finish and Level-1 MSL rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Inverting Input (Amp A) | Primary negative feedback node for first op-amp channel; accepts signal inversion or summing configuration |
| 2 | Non-Inverting Input (Amp A) | Positive input for differential gain stage; used in unity-gain buffer or non-inverting amplifier topologies |
| 3 | Output (Amp A) | Low-impedance buffered output capable of driving 2 kΩ loads to ±12 V swing |
| 4 | V− (Negative Supply) | Common return for dual-rail operation; must be decoupled near pin with 0.1 μF ceramic capacitor |
| 5 | Inverting Input (Amp B) | Second channel inverting input; electrically isolated from Amp A but shares supply rails |
| 6 | Non-Inverting Input (Amp B) | Second channel positive input; supports independent gain setting per channel |
| 7 | Output (Amp B) | Dual-channel output; enables stereo preamp, balanced-to-single-ended conversion, or active filtering |
| 8 | V+ (Positive Supply) | Positive rail connection; requires local 0.1 μF bypass capacitor to minimize supply-induced crosstalk |
Key Features
| Feature | Design Value |
|---|---|
| Wide Dynamic Range | >140 dB - enables detection of ultra-low-level signals (e.g., phono cartridge outputs) without masking by internal noise floor |
| Low Input Offset Voltage | 0.3 mV typical - minimizes DC error accumulation in multi-stage AC-coupled audio chains |
| High Common-Mode Rejection | 100 dB typical - rejects power supply ripple and ground noise in differential sensing applications |
| RIAA-Weighted Noise | 1.4 μV - optimized for vinyl playback preamplifiers meeting IEC 60958 and RIAA equalization standards |
| Capacitive Load Tolerance | Up to 50 pF - allows direct connection to long cables or tone control networks without added isolation resistors |
Applications
| Phono Preamp Stage | Line-Level Stereo Amplifier |
|---|---|
Use Scenario: Amplifying low-output moving-magnet (MM) phono cartridges before RIAA equalization and ADC sampling. IC Role / Device Role / Timing Role: Dual-channel low-noise preamplifier providing 40 dB gain with precise RIAA response shaping. Use Value: 1.4 μV RIAA-weighted noise and 0.002% THD preserve analog warmth while enabling high-resolution digitization. | Use Scenario: Driving line outputs in AV receivers, DACs, or active speakers with matched left/right channels. IC Role / Device Role / Timing Role: Dual-channel unity-gain buffer and level-shifting amplifier maintaining channel separation >120 dB. Use Value: 60° phase margin and 120 kHz power bandwidth ensure flat frequency response and transient fidelity across 20 Hz–20 kHz. |
| Active Tone Control Circuit | Microphone Preamplifier |
Use Scenario: Implementing bass/treble adjustment in consumer audio gear using feedback-based biquad topology. IC Role / Device Role / Timing Role: Dual op-amp performing simultaneous low-pass and high-pass filtering with adjustable Q and center frequency. Use Value: 15 MHz GBW and 7 V/μs slew rate prevent phase shift and slew limiting during aggressive EQ boosts. | Use Scenario: Boosting electret condenser microphone signals to line level in conferencing systems or portable recorders. IC Role / Device Role / Timing Role: First-stage gain block with bias feed and AC coupling, followed by second-stage filtering and level setting. Use Value: 4.5 nV/√Hz input noise and 0.3 mV offset minimize hiss and DC drift in battery-powered, low-power designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual audio operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| NE5532DR | Higher supply current (8 mA vs 5 mA), slightly lower slew rate (9 V/μs vs 7 V/μs), same SOIC-8 package | Better suited for high-drive line drivers; less optimal for ultra-low-noise phono stages due to higher 1/f noise | Choose NE5532DR when driving heavier loads (>600 Ω) or requiring wider common-mode range (±22 V) |
| OPA2134PA | FET-input architecture (0.1 pA IB vs 500 nA), lower distortion (0.00008%), higher cost, DIP-8/SOIC-8 options | Preferred for ultra-high-impedance sensor interfaces and studio-grade mic preamps where bias current matters | Choose OPA2134PA only when input impedance >10⁹ Ω or THD <0.0001% is mandatory; LM833MX offers better cost/performance for mainstream HiFi |
Compared with NE5532DR and OPA2134PA, the LM833MX delivers superior noise-performance-to-cost ratio for phono and line-level audio stages, with verified RIAA compliance, lower quiescent current than NE5532, and more predictable bipolar behavior than FET-input alternatives in temperature-varying environments.
Availability
LM833MX is available at Aetrix Electronics and suitable for HiFi audio equipment, professional audio interfaces, and consumer AV receivers requiring stable component supply, consistent parametric performance, and long-term production continuity.
Supply support for LM833MX 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, embedded processing, and digital signal technologies with over 90 years of innovation in precision analog ICs.
The LM833MX belongs to TI's legacy audio op-amp product line, engineered specifically for high-fidelity signal conditioning in consumer and pro-audio systems where low noise, low distortion, and stable gain are essential.
FAQ
What is the maximum capacitive load the LM833MX can drive without instability?
The LM833MX maintains stable operation with capacitive loads up to 50 pF directly at its output, as confirmed in the TI datasheet Application Hints section. Beyond 50 pF, a series isolation resistor (typically 10–100 Ω) is required to prevent phase shift-induced oscillation. This capability simplifies PCB layout in tone control and cable-driving applications where stray capacitance is unavoidable. The LM833MX's 60° phase margin ensures robustness even under marginal load conditions.
Does the LM833MX support single-supply operation?
The LM833MX is specified for dual-supply operation (±5 V to ±15 V) and is not characterized for true single-supply use. While it may function with a split virtual ground, TI does not guarantee parameters like input common-mode range (±12 V min), output swing (±12 V), or distortion performance under single-rail biasing. For single-supply audio designs, consider purpose-built alternatives such as the TLV27x or OPA167x families. The LM833MX datasheet explicitly defines operating conditions only for symmetric supplies.
How does the LM833MX compare to the LM833N in terms of performance and packaging?
The LM833MX and LM833N share identical electrical specifications, including 7 V/μs slew rate, 15 MHz gain bandwidth, and 0.002% THD. Their difference lies solely in packaging and environmental compliance: LM833MX uses SOIC-8 with lead-free (Sn) finish and RoHS compliance, while LM833N uses PDIP-8 with NiPdAu finish. Both operate from −40°C to +85°C and are pin-compatible across packages. The LM833MX is optimized for surface-mount manufacturing and automated assembly.
Is the LM833MX suitable for RIAA equalization circuits?
Yes - the LM833MX is explicitly validated for RIAA preamplifier applications, with a measured RIAA-weighted noise voltage of 1.4 μV and distortion of 0.002% at 1 kHz. Figure 26 and Figure 40 in the TI datasheet show complete RIAA network implementations using the LM833MX, confirming its ability to meet IEC 60958 amplitude and phase tolerances. Its low 1/f noise corner and wide dynamic range make it ideal for MM cartridge signal recovery prior to equalization.
What thermal considerations apply when operating the LM833MX at maximum supply voltage?
At ±15 V supply, the LM833MX draws up to 8 mA per amplifier (16 mA total), dissipating ~480 mW in worst-case DC conditions. With its SOIC-8 package thermal resistance (θJA) of 160°C/W, junction temperature rise could exceed 75°C above ambient - requiring derating above +60°C ambient or PCB copper pour heatsinking. TI specifies 500 mW absolute max power dissipation at TA ≤ 85°C; sustained operation near limits reduces long-term reliability. Use local 0.1 μF supply decoupling and avoid continuous rail-to-rail output swings at full gain.
LM833MX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Amplifier Type:
- Audio
- Number of Circuits:
- 2
- Output Type:
- -
- Slew Rate:
- 7V/µs
- Gain Bandwidth Product:
- 15 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 500 nA
- Voltage - Input Offset:
- 300 µV
- Current - Supply:
- 5mA (x2 Channels)
- Current - Output / Channel:
- 40 mA
- Voltage - Supply Span (Min):
- 10 V
- Voltage - Supply Span (Max):
- 30 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
LM833MX FAQ
1.How can I place an order for LM833MX through Aetrix?
Please submit a Request for Quotation (RFQ) for LM833MX on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for LM833MX reliable?
The price and inventory of LM833MX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM833MX is usually 5 days.
3.What payment methods are accepted for LM833MX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM833MX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM833MX?
LM833MX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM833MX order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for LM833MX?
For technical support, including LM833MX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM833MX requirements.
6.How does Aetrix verify that LM833MX is sourced from the original manufacturer or authorized distributors?
All LM833MX products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that LM833MX meets industry standards.
7.What is the process for return or replacement of LM833MX?
All LM833MX units undergo pre-shipment inspection (PSI). If there is an issue with LM833MX, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The LM833MX part is unused and in its original packaging.
Return procedure for LM833MX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM833MX Tags
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