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Texas Instruments LM833M/NOPB
- Part No.:
- LM833M/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM833M/NOPB.pdf
- Description:
- IC AUDIO 2 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,168
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Product details
Overview
LM833M/NOPB from Texas Instruments is a dual audio operational amplifier optimized for high-fidelity preamplifier and line-level signal conditioning stages, featuring 15 MHz gain bandwidth, 7 V/μs slew rate, 4.5 nV/√Hz input noise voltage, and 0.002% THD at 1 kHz - deployed in stereo audio equipment, RIAA phono preamps, and professional line drivers.
For engineers reviewing the LM833M/NOPB datasheet, LM833M/NOPB pinout, LM833M/NOPB application, or LM833M/NOPB equivalent, key selection criteria include low-noise audio performance, internal unity-gain stability across closed-loop gains, wide power bandwidth (120 kHz), and SOIC-8 packaging compatibility with legacy dual op-amp footprints.
Technical Context
The LM833M/NOPB employs internally compensated voltage-feedback topology with 60° phase margin, enabling stable operation without external compensation across all closed-loop gains. Its dual-channel architecture shares a common substrate but maintains >120 dB input-referred crosstalk suppression at audio frequencies.
Designed specifically for analog audio signal paths, it delivers rail-to-rail output swing capability (±13.4 V into 2 kΩ) with ±15 V supplies, low input bias current (500–1000 nA), and robust capacitive load drive up to 50 pF without oscillation - supporting direct connection to tone control networks and filter stages.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Bandwidth Product | 15 MHz typical - supports stable unity-gain and high-gain audio amplification up to 20 kHz with ≥60° phase margin |
| Slew Rate | 7 V/μs typical - enables full-power response to transient audio signals without slew-induced distortion |
| Input Noise Voltage | 4.5 nV/√Hz at 1 kHz - preserves dynamic range in low-level microphone and phono preamp stages |
| Total Harmonic Distortion | 0.002% at 1 kHz, 3 Vrms output - meets HiFi-grade line-level signal integrity requirements |
| Input Offset Voltage | 0.3 mV maximum - minimizes DC error accumulation in multi-stage audio chains |
| Common-Mode Rejection | 100 dB typical - rejects power supply and ground noise in balanced-input configurations |
| Supply Voltage Range | ±5 V to ±18 V - accommodates standard ±12 V and ±15 V audio system rails |
Pinout & Package
LM833M/NOPB uses an 8-pin SOIC (D) package (JEDEC MS-012AA), 3.91 mm × 4.90 mm body size, 1.75 mm max height, with gull-wing leads and RoHS-compliant matte tin (SN) lead finish. Pin 1 is marked by a beveled corner or dot.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Inverting Input (Amp A) | Accepts inverted-phase signal input; used with feedback network for inverting gain configuration |
| 2 | Non-Inverting Input (Amp A) | Accepts non-inverted signal input; referenced to ground or bias network in single-supply designs |
| 3 | Output (Amp A) | Amplified output of first op-amp channel; drives loads up to 2 kΩ with ±13.4 V swing |
| 4 | Negative Supply (V−) | Connects to negative rail (e.g., −15 V); shared by both amplifiers |
| 5 | Non-Inverting Input (Amp B) | Input for second amplifier channel; electrically isolated from Amp A inputs |
| 6 | Inverting Input (Amp B) | Feedback node for second channel; supports independent gain setting per channel |
| 7 | Output (Amp B) | Second independent output; identical AC/DC specs to Pin 3 |
| 8 | Positive Supply (V+) | Connects to positive rail (e.g., +15 V); shared supply for dual-core operation |
Key Features
| Feature | Design Value |
|---|---|
| Wide Dynamic Range | >140 dB - enables detection of ultra-low-level audio signals without masking by internal noise floor |
| Low Distortion Architecture | 0.002% THD+N at 1 kHz - eliminates audible harmonic artifacts in critical listening applications |
| Internal Compensation | Stable at unity gain - eliminates need for external compensation components in most audio gain stages |
| High Slew Rate / Low Noise Trade-off | 7 V/μs with 4.5 nV/√Hz - balances transient fidelity and noise performance better than general-purpose op-amps |
| Capacitive Load Tolerance | Stable with ≤50 pF - allows direct interface to tone controls, filters, and long PCB traces without isolation resistors |
Applications
| RIAA Phono Preamp | Professional Line Driver |
|---|---|
Use Scenario: Amplifying low-output moving-magnet cartridge signals (5 mV) with precise RIAA equalization curve. IC Role / Device Role / Timing Role: Dual-channel configured as RIAA integrator (Amp A) and flat-gain buffer (Amp B) in active equalization topology. Use Value: 4.5 nV/√Hz input noise ensures ≥70 dB signal-to-noise ratio at 1 kHz; 15 MHz GBW maintains phase accuracy across 20 Hz–20 kHz band. |
Use Scenario: Driving 600 Ω professional audio lines over distances up to 100 m with minimal loss and crosstalk. IC Role / Device Role / Timing Role: Dual op-amp used in balanced output stage (one amp per polarity) with ±15 V supplies. Use Value: ±13.4 V output swing into 2 kΩ ensures headroom for +24 dBu line levels; >120 dB crosstalk prevents channel bleed in stereo systems. |
| HiFi Stereo Preamplifier | Tone Control & Equalization |
Use Scenario: Volume-controlled, source-selectable preamp stage before power amplification in consumer HiFi receivers. IC Role / Device Role / Timing Role: One LM833M/NOPB handles left channel, another right channel - each providing 34.5 dB gain and DC-coupled signal path. Use Value: 0.3 mV max input offset minimizes channel imbalance; 120 kHz power bandwidth supports full-audio-band transient response. |
Use Scenario: Implementing 10-band graphic EQ or parametric tone controls in mixing consoles and studio monitors. IC Role / Device Role / Timing Role: Configured as multiple biquad filter sections (low-pass, high-pass, peaking) using dual amplifiers per band. Use Value: 60° phase margin ensures monotonic step response; 50 pF capacitive load tolerance allows direct integration of potentiometer wiper capacitance. |
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 input bias current (300 nA typ vs. 500–1000 nA), lower noise (3.5 nV/√Hz), same SOIC-8 package | Better suited for ultra-low-noise microphone preamps; less ideal for high-Z passive tone stacks due to higher IB | Select NE5532DR when lowest possible noise dominates over input impedance requirements |
| OPA2134PA | FET-input (2 pA IB), wider supply range (±2.5 V to ±18 V), higher cost, same pinout | Enables single-supply audio designs and high-impedance sensor interfaces not feasible with bipolar LM833M/NOPB | Choose OPA2134PA for battery-powered or mixed-signal systems requiring rail-splitter-free operation |
Compared with NE5532DR and OPA2134PA, the LM833M/NOPB offers superior cost-performance balance for fixed dual-supply audio systems where moderate input impedance and proven stability with passive networks are prioritized over absolute lowest noise or FET-input flexibility.
Availability
LM833M/NOPB is available at Aetrix Electronics and suitable for stereo audio equipment, RIAA phono preamplifiers, and professional line driver circuits requiring stable component supply, long-term industrial availability, and RoHS-compliant manufacturing.
Supply support for LM833M/NOPB 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 connectivity technologies, with over 90 years of innovation in precision analog ICs.
The LM833 series belongs to TI's legacy audio op-amp product line, engineered specifically for high-fidelity analog signal conditioning in consumer and professional audio systems - emphasizing low noise, wide bandwidth, and ease of use in discrete gain stages.
FAQ
What is the maximum capacitive load the LM833M/NOPB can drive without instability?
The LM833M/NOPB remains stable with capacitive loads up to 50 pF, as confirmed in the TI datasheet Application Hints section. Loads exceeding this value require series isolation resistance at the output to maintain phase margin above 60°. This specification directly supports its use in tone control networks and long-trace audio routing without added compensation components.
Does the LM833M/NOPB support single-supply operation?
Yes, the LM833M/NOPB operates from split supplies (±5 V to ±18 V) or single-ended rails (e.g., 0 V and +30 V), provided the input common-mode range (±12 V min) and output swing limits are respected. Its input stage is not rail-to-rail, so proper biasing - such as mid-rail reference generation - is required for true single-supply audio applications.
How does the LM833M/NOPB compare to the LM833N/NOPB in terms of performance and packaging?
The LM833M/NOPB and LM833N/NOPB share identical electrical specifications and thermal characteristics; the only difference is package type - SOIC-8 (D) for LM833M/NOPB versus PDIP-8 (P) for LM833N/NOPB. Both are RoHS-compliant, rated for −40°C to +85°C, and pin-compatible, allowing drop-in replacement in board layouts designed for either footprint.
Is the LM833M/NOPB suitable for RIAA equalization circuits?
Yes - the LM833M/NOPB is explicitly validated for RIAA preamp use in TI's datasheet Figure 26 and Figure 40, delivering 35 dB gain, 0.33 μV input-referred noise (A-weighted), and 90 dB SNR at 1 kHz. Its low distortion (0.002%), wide power bandwidth (120 kHz), and stable frequency response make it ideal for passive or active RIAA implementations.
What is the thermal resistance (θJA) of the LM833M/NOPB in SOIC-8 package?
The LM833M/NOPB in SOIC-8 (D) package has a junction-to-ambient thermal resistance (θJA) of 133°C/W under standard JEDEC test conditions (1-inch² copper pad, 1 oz Cu). This value is specified in TI's official Package Thermal Metrics report for D0008A, confirming safe operation at 5 mA per amplifier (10 mA total) with ≤500 mW dissipation at ambient temperatures up to 85°C.
LM833M/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- 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
LM833M/NOPB FAQ
1.How can I place an order for LM833M/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM833M/NOPB 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 LM833M/NOPB reliable?
The price and inventory of LM833M/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM833M/NOPB is usually 5 days.
3.What payment methods are accepted for LM833M/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM833M/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM833M/NOPB?
LM833M/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM833M/NOPB 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 LM833M/NOPB?
For technical support, including LM833M/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM833M/NOPB requirements.
6.How does Aetrix verify that LM833M/NOPB is sourced from the original manufacturer or authorized distributors?
All LM833M/NOPB 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 LM833M/NOPB meets industry standards.
7.What is the process for return or replacement of LM833M/NOPB?
All LM833M/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM833M/NOPB, 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 LM833M/NOPB part is unused and in its original packaging.
Return procedure for LM833M/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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