My Inquiry
My Account
Texas Instruments LM318M/NOPB
- Part No.:
- LM318M/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM318M/NOPB.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:833
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LM318M/NOPB from Texas Instruments is a precision high-speed operational amplifier optimized for wide bandwidth and fast settling in analog signal conditioning. It delivers 15 MHz small-signal bandwidth, 50 V/μs minimum slew rate, ±5V to ±20V dual-supply operation, and operates across 0°C to +70°C. It is widely used in A/D converter front-ends and active filter stages where speed and DC accuracy must coexist.
For engineers reviewing the LM318M/NOPB datasheet, LM318M/NOPB pinout, LM318M/NOPB application, or LM318M/NOPB equivalent, key selection criteria include guaranteed slew rate at temperature, input bias current stability over voltage, unity-gain stability with optional feedforward compensation, and SOIC-8 thermal performance under continuous output loading.
Technical Context
The LM318M/NOPB uses internally compensated bipolar transistor architecture with unity-gain stable design, enabling immediate use without external compensation. Its input stage features back-to-back diodes for differential input overvoltage protection and internal current limiting on both inputs and output.
It supports feedforward compensation in inverting configurations to boost slew rate beyond 150 V/μs and reduce 0.1% settling time to under 1 μs with a single capacitor. The amplifier remains stable driving capacitive loads up to 1000 pF when isolated via series resistor per Figure 40.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Small-Signal Bandwidth | 15 MHz - Enables accurate amplification of signals up to ~10 MHz in closed-loop gain ≥2 configurations. |
| Slew Rate | 50 V/μs min - Supports full-scale 10 V step response in ≤200 ns; critical for sample-and-hold and pulse amplification. |
| Input Bias Current | 150–500 nA max - Low enough for high-impedance sensor interfaces (e.g., photodiode transimpedance) without significant offset drift. |
| Supply Voltage Range | ±5 V to ±20 V - Compatible with legacy industrial rails and modern ±12 V or ±15 V systems without level-shifting. |
| Operating Temperature | 0°C to +70°C - Qualified for commercial-grade embedded instrumentation and test equipment environments. |
| Input Offset Voltage | 2–10 mV max - Sufficient for medium-precision applications; trimmable via external potentiometer per Figure 39. |
| Large-Signal Voltage Gain | 25 V/mV min - Ensures ≥2500 open-loop gain at ±10 V output swing, supporting stable closed-loop gains up to 100. |
Pinout & Package
LM318M/NOPB is housed in an 8-pin SOIC (D) package per JEDEC MS-012 variation AA, 1.75 mm max height, with standard 1.27 mm pitch. Thermal resistance is 100°C/W junction-to-ambient (JEDEC std PCB).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Inverting Input (−) | Differential input node | Accepts feedback network connection; protected by internal back-to-back diodes limiting differential voltage to ±1 V. |
| Non-Inverting Input (+) | Differential input node | Reference input for follower or non-inverting gain; same ESD protection as inverting input. |
| Output | Amplified signal source | Capable of ±12 V swing into 2 kΩ; includes short-circuit protection and thermal shutdown. |
| Positive Supply (V+) | Power rail | Connects to +VS supply; requires 0.1 μF ceramic bypass capacitor to ground within 1 cm. |
| Negative Supply (V−) | Power rail | Connects to −VS supply; identical bypassing requirement as V+ for stability. |
| Offset Null (1) | Trim terminal | Used with external 10 kΩ potentiometer (wiper to V−, ends to V+ and V−) to null input offset voltage. |
| Offset Null (2) | Trim terminal | Second terminal of same nulling network; not connected in standard configurations. |
| NC | No connect | Pin 8 is unconnected in LM318M/NOPB; no internal bond wire or circuitry attached. |
Key Features
| Feature | Design Value |
|---|---|
| Unity-gain stable internal compensation | Eliminates need for external compensation components in most applications, reducing BOM count and layout complexity. |
| Feedforward-capable inverting configuration | Enables >150 V/μs slew rate and near-doubling of bandwidth when external capacitor is added between output and inverting input. |
| Input/output overload protection | Prevents latch-up or damage during transient overvoltage or short-circuit events, improving system robustness in field-deployed equipment. |
| Pin compatibility with general-purpose op amps | SOIC-8 footprint matches LM741, TL081, and similar legacy devices-enabling drop-in upgrades in existing designs. |
| 0.1% settling time optimization | Single capacitor addition reduces 10 V step settling to <1 μs, meeting timing requirements in high-speed data acquisition systems. |
Applications
| Active Filter Design | A/D Converter Front-End |
|---|---|
Use Scenario: Implementing 4th-order Butterworth low-pass filter at 1 MHz cutoff in medical signal conditioning. IC Role / Device Role / Timing Role: High-speed op amp configured as unity-gain buffer and multiple feedback (MFB) stage to maintain phase margin and minimize group delay distortion. Use Value: 15 MHz bandwidth ensures flat frequency response through filter passband; 50 V/μs slew rate prevents slew-induced harmonic distortion on fast edge transitions. | Use Scenario: Driving SAR ADC input in automated test equipment requiring 12-bit accuracy at 1 MSPS sampling rate. IC Role / Device Role / Timing Role: Track-and-hold amplifier buffer isolating multiplexer output from ADC input capacitance and charge kickback. Use Value: Sub-1 μs 0.1% settling enables full-scale step acquisition within one ADC conversion cycle; ±12 V swing matches common 12-bit reference ranges. |
| Oscillator & Waveform Generation | Instrumentation Signal Conditioning |
Use Scenario: Building Wein bridge sine wave oscillator operating at 50 kHz with THD <0.5%. IC Role / Device Role / Timing Role: Gain block sustaining oscillation with precise amplitude control via JFET-based AGC loop. Use Value: Low input bias current (≤500 nA) avoids loading RC timing network; high open-loop gain ensures reliable startup and stable amplitude regulation. | Use Scenario: Amplifying low-level thermocouple output (±10 mV) in industrial PLC analog input module. IC Role / Device Role / Timing Role: Precision non-inverting amplifier with gain = 100, followed by anti-aliasing filter before ADC. Use Value: 2–10 mV input offset allows direct measurement without software calibration; 8 mA supply current supports low-power module design. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL081CDR | Lower slew rate (13 V/μs), higher input bias current (30 pA typical but JFET input), 3 MHz bandwidth | Better for low-noise audio or low-power battery-operated circuits; insufficient for >100 kHz closed-loop precision timing | Select TL081CDR only when power efficiency or input noise dominates over speed and settling time. |
| OPA211IDR | Higher precision (1 µV offset), lower noise (1.1 nV/√Hz), 45 MHz GBW, but 27 V/μs slew rate and higher cost | Preferred for metrology-grade DC-coupled systems; less suitable for fast transient capture where slew rate is limiting | Choose OPA211IDR when sub-mV offset and nanovolt noise outweigh raw slew performance and cost sensitivity. |
Compared with TL081CDR and OPA211IDR, the LM318M/NOPB uniquely balances 15 MHz bandwidth, 50 V/μs slew rate, and SOIC-8 compatibility at commercial temperature grade-making it optimal for cost-sensitive, speed-critical industrial signal chains where moderate DC precision suffices.
Availability
LM318M/NOPB is available at Aetrix Electronics and suitable for active filter design, A/D converter front-end buffering, oscillator circuits, and instrumentation signal conditioning requiring stable component supply across commercial temperature range and long-lifecycle production.
Supply support for LM318M/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 delivering analog, embedded processing, and connectivity solutions with emphasis on reliability, longevity, and broad technical documentation.
The LM318M/NOPB belongs to TI's legacy high-speed op amp product line, designed specifically for applications demanding wide bandwidth and fast settling without sacrificing DC stability-targeting industrial test equipment, data acquisition, and real-time control systems.
FAQ
What is the maximum recommended supply voltage for LM318M/NOPB?
The absolute maximum supply voltage for LM318M/NOPB is ±20 V. Operation beyond this risks permanent damage. For reliable long-term performance, TI recommends staying within ±18 V, especially at elevated ambient temperatures. Derating is required above 70°C ambient per thermal resistance specs: 100°C/W junction-to-ambient means 100 mW dissipation raises junction temperature by 10°C above ambient. Always use 0.1 μF ceramic bypass capacitors at each supply pin.
Does LM318M/NOPB require external compensation for unity-gain stability?
No, LM318M/NOPB is internally unity-gain compensated and operates stably in unity-gain follower configuration without external components. However, external feedforward compensation (e.g., capacitor from output to inverting input) can be added to increase slew rate beyond 150 V/μs in inverting applications. Overcompensation is also supported for enhanced phase margin when bandwidth is secondary to stability.
Can LM318M/NOPB drive capacitive loads directly?
LM318M/NOPB is not optimized for direct capacitive load driving. Loads exceeding 100 pF may cause peaking or oscillation. TI recommends isolation via a 10–100 Ω series resistor between output and load (Figure 40), especially for loads >500 pF. This maintains phase margin while preserving settling behavior. For >1000 pF loads, consider adding a dedicated output buffer stage.
What is the purpose of Pin 1 and Pin 5 on LM318M/NOPB?
Pin 1 and Pin 5 are offset null terminals used together with an external 10 kΩ potentiometer to adjust input offset voltage. The potentiometer wiper connects to Pin 5 (V−), one end to Pin 1 (V+), and the other end to V−. This configuration allows trimming offset to <1 mV in precision applications. In standard use without trimming, both pins are left unconnected.
Is LM318M/NOPB RoHS compliant and lead-free?
Yes, LM318M/NOPB is RoHS compliant and lead-free. Per TI's PACKAGE OPTION ADDENDUM, the "NOPB" suffix indicates lead-free finish (Sn, matte tin), MSL Level-1 rating, and compliance with JEDEC J-STD-020. The device uses SnAgCu solder paste compatible with standard reflow profiles and carries full traceability documentation for industrial and medical applications.
LM318M/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:
- General Purpose
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- 70V/µs
- Gain Bandwidth Product:
- 15 MHz
- -3db Bandwidth:
- 15 MHz
- Current - Input Bias:
- 150 nA
- Voltage - Input Offset:
- 4 mV
- Current - Supply:
- 5mA
- Current - Output / Channel:
- -
- Voltage - Supply Span (Min):
- 10 V
- Voltage - Supply Span (Max):
- 40 V
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
LM318M/NOPB FAQ
1.How can I place an order for LM318M/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM318M/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 LM318M/NOPB reliable?
The price and inventory of LM318M/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM318M/NOPB is usually 5 days.
3.What payment methods are accepted for LM318M/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM318M/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM318M/NOPB?
LM318M/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM318M/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 LM318M/NOPB?
For technical support, including LM318M/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM318M/NOPB requirements.
6.How does Aetrix verify that LM318M/NOPB is sourced from the original manufacturer or authorized distributors?
All LM318M/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 LM318M/NOPB meets industry standards.
7.What is the process for return or replacement of LM318M/NOPB?
All LM318M/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM318M/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 LM318M/NOPB part is unused and in its original packaging.
Return procedure for LM318M/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM318M/NOPB Tags
-
LM358DT
STMicroelectronics
-
LM358DR
Texas Instruments
-
LM2904DR
Texas Instruments
-
LM358ADR
Texas Instruments
-
LM2904DGKR
Texas Instruments
-
LM324DR
Texas Instruments
-
MCP6006T-E/OT
Microchip Technology
-
MCP6006UT-E/OT
Microchip Technology
-
LM324PWR
Texas Instruments
-
LM2902PWR
Texas Instruments
-
LM2902DR
Texas Instruments
-
LM358P
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
