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Texas Instruments LM837MX/NOPB
- Part No.:
- LM837MX/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM837MX/NOPB.pdf
- Description:
- IC OPAMP GP 4 CIRCUIT 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,235
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Product details
Overview
LM837MX/NOPB from Texas Instruments (formerly National Semiconductor) is a low-noise quad operational amplifier optimized for high-fidelity audio signal conditioning. It delivers 4.5 nV/√Hz input voltage noise, 10 V/µs slew rate, and 25 MHz gain bandwidth, enabling clean amplification in preamplifier, graphic equalizer, and professional audio line-driver stages.
For engineers reviewing the LM837MX/NOPB datasheet, LM837MX/NOPB pinout, LM837MX/NOPB application, or LM837MX/NOPB equivalent, key selection criteria include its 600 Ω output drive capability, ±40 mA output current, −40°C to +85°C operating range, and SOIC-14 package compatibility with legacy quad op-amp footprints.
Technical Context
The LM837MX/NOPB integrates four independent high-speed op-amps on a single die, each internally compensated for stable unity-gain operation. Its output stage is specifically designed to sustain ±10 V swing into 600 Ω loads without clipping, supporting line-level audio distribution.
It features JIS A-weighted input noise of 0.5 µV (integrated 20 Hz–20 kHz), 0.0015% THD at 3 Vrms output, and 120 dB input-referred crosstalk - all verified at ±15 V supply and 25°C ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Noise Voltage | 4.5 nV/√Hz at 1 kHz - enables low-noise sensor front-end and mic preamp designs |
| Slew Rate | 10 V/µs typical - supports full-swing audio signals up to ~1.6 MHz without distortion |
| Gain Bandwidth Product | 25 MHz typical - allows stable closed-loop gain ≥10 at 2.5 MHz |
| Output Current | ±40 mA - drives 600 Ω loads with ≤0.5% THD at 3 Vrms |
| Common-Mode Range | ±14 V at ±15 V supply - accommodates rail-to-rail input signals in dual-supply systems |
| THD + N | 0.0015% at 20–20 kHz - meets professional audio fidelity requirements |
| Supply Voltage Range | ±18 V absolute max - supports industrial-grade ±15 V systems with margin |
Pinout & Package
LM837MX/NOPB is housed in a 14-pin SOIC (Small Outline Integrated Circuit) package per NS Package Number M14A, with standard quad op-amp pinout and 1.27 mm pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Output A | Amplified signal output for Channel A |
| 2 | Inverting Input A | Signal inversion node for Channel A |
| 3 | Non-Inverting Input A | Signal reference node for Channel A |
| 4 | V− | Negative supply rail connection for all four amplifiers |
| 5 | Non-Inverting Input B | Signal reference node for Channel B |
| 6 | Inverting Input B | Signal inversion node for Channel B |
| 7 | Output B | Amplified signal output for Channel B |
| 8 | Output C | Amplified signal output for Channel C |
| 9 | Inverting Input C | Signal inversion node for Channel C |
| 10 | Non-Inverting Input C | Signal reference node for Channel C |
| 11 | V+ | Positive supply rail connection for all four amplifiers |
| 12 | Non-Inverting Input D | Signal reference node for Channel D |
| 13 | Inverting Input D | Signal inversion node for Channel D |
| 14 | Output D | Amplified signal output for Channel D |
Key Features
| Feature | Design Value |
|---|---|
| Low-noise architecture | 4.5 nV/√Hz input voltage noise and 0.7 pA/√Hz input current noise - preserves SNR in microphone and phono preamp stages |
| High-output-drive capability | ±40 mA output current into 600 Ω load - eliminates need for external buffer in line-driver applications |
| Unity-gain stable design | Internally compensated - simplifies layout and eliminates external compensation components |
| Low-distortion performance | 0.0015% THD+N at 3 Vrms, 20–20 kHz - satisfies AES17-compliant audio measurement systems |
| Wide common-mode range | ±14 V input range at ±15 V supply - supports DC-coupled signal paths in instrumentation |
Applications
| Professional Audio Line Driver | Digital Audio DAC Output Buffer |
|---|---|
Use Scenario: Driving balanced XLR outputs from studio-grade audio interfaces. IC Role / Device Role / Timing Role: Quad op-amp configured as two differential drivers (A/B and C/D pairs) with precision gain matching. Use Value: Delivers ±10 V swing into 600 Ω with <0.002% THD, meeting AES3 line-driving specifications. | Use Scenario: Post-filter buffering of stereo DAC outputs before analog volume control. IC Role / Device Role / Timing Role: Dual-channel non-inverting buffer (Channels A & B) with low noise floor preserving 24-bit dynamic range. Use Value: 4.5 nV/√Hz noise ensures >110 dB SNR at 2 Vrms output, avoiding quantization-limited performance. |
| Graphic Equalizer Signal Path | Low-Noise Instrumentation Preamp |
Use Scenario: Gain-setting stage in parametric EQ sections with switched feedback networks. IC Role / Device Role / Timing Role: Four independent amplifiers implementing band-select, boost/cut, and summing functions. Use Value: 120 dB channel crosstalk prevents frequency-band leakage; 25 MHz GBW supports steep filter slopes up to 10 kHz. | Use Scenario: First-stage amplification of piezoelectric sensor outputs in vibration monitoring systems. IC Role / Device Role / Timing Role: Single-channel non-inverting amplifier with 100× gain and DC-coupled input. Use Value: 0.3 mV max input offset and 2 µV/°C drift minimize baseline drift over industrial temperature range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL074CDR | Higher 18 nV/√Hz input noise; 13 V/µs slew rate; lower 3 mA supply current | Less suitable for low-noise audio; preferred in cost-sensitive general-purpose analog circuits | Select TL074CDR only when noise <10 nV/√Hz is not required and power budget is constrained |
| OPA4134UA | Lower 8 nV/√Hz noise; rail-to-rail output; higher 3.5 mA supply current per amp | Better for wide-supply-range systems but lacks 600 Ω drive strength at ±15 V | Choose OPA4134UA for rail-to-rail interfacing; retain LM837MX/NOPB for legacy 600 Ω line-driving compliance |
Compared with TL074CDR and OPA4134UA, the LM837MX/NOPB uniquely balances ultra-low noise, high output current, and proven 600 Ω drive capability - making it the preferred choice for professional audio equipment requiring both fidelity and robust load handling.
Availability
LM837MX/NOPB is available at Aetrix Electronics and suitable for professional audio equipment, test instrumentation, and industrial signal conditioning requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LM837MX/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 acquired National Semiconductor in 2011 and maintains its high-performance analog portfolio, including precision op-amps and data converters.
The LM837MX/NOPB belongs to TI's legacy high-fidelity audio op-amp product line, engineered specifically for low-noise, high-output-drive applications in professional audio infrastructure and measurement systems.
FAQ
What is the maximum output current specification for LM837MX/NOPB?
The LM837MX/NOPB provides ±40 mA continuous output current per amplifier, verified under RL = 100 Ω load conditions at TA = 25°C and ±15 V supply. This enables direct driving of 600 Ω line loads with minimal distortion, and is explicitly documented in the "Current Limit" typical performance curves and AC electrical characteristics table of the official datasheet.
Does LM837MX/NOPB support single-supply operation?
The LM837MX/NOPB is specified for dual-supply operation (±18 V absolute max), with common-mode input range extending to ±14 V at ±15 V supplies. While it can operate with asymmetric or reduced dual supplies, it is not characterized for true single-supply use (e.g., 0 V and +30 V), and its input/output voltage ranges do not support rail-to-rail functionality. For single-supply designs, consider TI's TLV2464 or OPA4340.
What is the input offset voltage specification for LM837MX/NOPB?
The LM837MX/NOPB has a maximum input offset voltage of 5 mV at TA = 25°C and ±15 V supply, with a typical value of 0.3 mV. The average temperature coefficient is 2 µV/°C, ensuring predictable drift behavior over the −40°C to +85°C operating range. These values are measured with RS = 50 Ω and appear in the DC Electrical Characteristics table of the datasheet.
Is LM837MX/NOPB pin-compatible with other quad op-amps?
Yes, the LM837MX/NOPB uses the industry-standard SOIC-14 pinout for quad op-amps (M14A package), matching pin assignments of LM324, TL074, and OP27-based quads. Its internal compensation and output stage allow drop-in replacement in many existing designs, though system-level validation of noise, drive strength, and stability is recommended due to performance differences.
What is the power bandwidth of LM837MX/NOPB and how is it defined?
The LM837MX/NOPB has a typical power bandwidth of 200 kHz, defined as the full-power sine-wave frequency at which total harmonic distortion remains below 1% for a 25 VP-P output into a 600 Ω load. This metric reflects real-world large-signal performance and is distinct from small-signal bandwidth - confirming suitability for high-fidelity audio amplification up to 20 kHz with ample headroom.
LM837MX/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 4
- Output Type:
- -
- Slew Rate:
- 10V/µs
- Gain Bandwidth Product:
- 25 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 500 nA
- Voltage - Input Offset:
- 300 µV
- Current - Supply:
- 10mA (x4 Channels)
- Current - Output / Channel:
- 40 mA
- Voltage - Supply Span (Min):
- 36 V
- Voltage - Supply Span (Max):
- 36 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-SOIC
LM837MX/NOPB FAQ
1.How can I place an order for LM837MX/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM837MX/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 LM837MX/NOPB reliable?
The price and inventory of LM837MX/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM837MX/NOPB is usually 5 days.
3.What payment methods are accepted for LM837MX/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM837MX/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM837MX/NOPB?
LM837MX/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM837MX/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 LM837MX/NOPB?
For technical support, including LM837MX/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM837MX/NOPB requirements.
6.How does Aetrix verify that LM837MX/NOPB is sourced from the original manufacturer or authorized distributors?
All LM837MX/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 LM837MX/NOPB meets industry standards.
7.What is the process for return or replacement of LM837MX/NOPB?
All LM837MX/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM837MX/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 LM837MX/NOPB part is unused and in its original packaging.
Return procedure for LM837MX/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM837MX/NOPB Tags
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