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Texas Instruments LM348DG4
- Part No.:
- LM348DG4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM348DG4.pdf
- Description:
- IC OPAMP GP 4 CIRCUIT 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,139
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Product details
Overview
LM348DG4 from Texas Instruments is a quadruple, independent, high-gain, internally compensated operational amplifier designed for general-purpose analog signal conditioning in industrial and commercial systems. It delivers 1 MHz unity-gain bandwidth, ±12 V maximum peak output swing (RL ≥ 10 kΩ), 0.5 V/µs slew rate, 6 mV max input offset voltage at 25°C, and operates from ±4 V to ±18 V dual supplies - commonly used in transducer amplification, active filtering, and DC precision instrumentation.
For engineers reviewing the LM348DG4 datasheet, LM348DG4 pinout, LM348DG4 application, or LM348DG4 equivalent, key selection criteria include its SOIC-14 package, 0°C to 70°C temperature range, low 2.4–4.5 mA supply current per device (four amplifiers), and compatibility with legacy µA741-based designs requiring quad op-amp functionality without layout changes.
Technical Context
The LM348DG4 implements four fully independent Class AB op-amps on a single die, each with internal frequency compensation for stable unity-gain operation. Its input stage uses matched transistor pairs to achieve low input offset voltage (≤6 mV) and low input offset current (≤50 nA at 25°C).
Each amplifier features input/output overload protection and rail-to-rail common-mode input range (±12 V), supporting operation in inverting/non-inverting configurations, differential amplifiers, and active filters without external compensation components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | ±4 V to ±18 V - supports standard ±5 V, ±12 V, and ±15 V dual-rail systems without derating. |
| Unity-Gain Bandwidth | 1 MHz - enables stable closed-loop operation up to ~100 kHz in gain-of-10 configurations. |
| Slew Rate | 0.5 V/µs - limits full-power bandwidth to ~80 kHz at ±10 V output swing; suitable for audio and medium-speed control loops. |
| Input Offset Voltage (max) | 6 mV at 25°C - sets worst-case DC error floor in precision DC-coupled stages without trimming. |
| Common-Mode Input Range | ±12 V - allows inputs to swing within 3 V of either rail, enabling direct interfacing with sensors referenced to VCC– or VCC+. |
| Output Short-Circuit Duration | Unlimited - permits safe operation into accidental shorts without thermal shutdown or latch-up. |
Pinout & Package
LM348DG4 is housed in a 14-pin SOIC (D) package with 1.27 mm pitch, 8.65 mm × 3.91 mm body size, and RoHS-compliant NiPdAu lead finish. Thermal resistance θJA is 86°C/W, supporting continuous operation at ambient temperatures up to 70°C with appropriate PCB copper area.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Amplifier 1 Output | Low-impedance buffered output; capable of ±25 mA short-circuit current. |
| 2 | Amplifier 1 Inverting Input | Differential input node; bias current ≤200 nA (full range) affects high-Z source impedance accuracy. |
| 3 | Amplifier 1 Non-Inverting Input | Differential input node; matched to Pin 2 for offset minimization. |
| 4 | Positive Supply (VCC+) | Connects to +V rail; decoupling capacitor (0.1 µF) required near pin for stability. |
| 5 | Amplifier 2 Non-Inverting Input | Independent input for second op-amp; electrically isolated from other amplifiers. |
| 6 | Amplifier 2 Inverting Input | Second amplifier's inverting node; shares no internal nodes with Amplifier 1. |
| 7 | Amplifier 2 Output | Second independent output; crosstalk attenuation ≥120 dB prevents inter-amplifier coupling. |
| 8 | Negative Supply (VCC–) | Connects to –V rail; must be referenced to system ground via symmetric decoupling. |
| 9 | Amplifier 3 Non-Inverting Input | Third amplifier input; identical electrical specs to Pins 3 and 5. |
| 10 | Amplifier 3 Inverting Input | Third amplifier inverting input; maintains same offset and bias characteristics as other channels. |
| 11 | Amplifier 3 Output | Third output; rated for same load drive and thermal dissipation as Pins 1 and 7. |
| 12 | Amplifier 4 Non-Inverting Input | Fourth channel non-inverting input; fully independent with no shared substrate coupling. |
| 13 | Amplifier 4 Inverting Input | Fourth channel inverting input; matches input stage topology of all other amplifiers. |
| 14 | Amplifier 4 Output | Fourth output; completes quad configuration; all outputs specified for RL ≥ 2 kΩ. |
Key Features
| Feature | Design Value |
|---|---|
| Internally Compensated | Enables stable unity-gain operation without external capacitors - reduces BOM count and layout sensitivity. |
| Class AB Output Stage | Delivers low crossover distortion and ±25 mA short-circuit current - supports driving moderate loads directly. |
| Input/Output Overload Protection | Prevents latch-up or permanent damage during transient overvoltage or output short events - improves field reliability. |
| Interchangeable with LM148/LM248 | Shares pinout and core specs across temperature grades - simplifies design reuse and qualification across military, industrial, and commercial variants. |
| Low Supply Current | 2.4–4.5 mA total for four amplifiers - enables use in power-constrained systems where quad functionality is needed without excessive quiescent draw. |
Applications
| Transducer Signal Conditioning | Active Low-Pass Filtering |
|---|---|
Use Scenario: Amplifying low-level mV-range signals from strain gauges, thermocouples, or pressure sensors in factory-floor instrumentation. IC Role / Device Role / Timing Role: Quad op-amp provides simultaneous signal buffering, gain setting, offset nulling, and reference generation in compact front-end circuitry. Use Value: 6 mV max input offset and ±12 V output swing preserve DC accuracy while supporting wide dynamic range sensor interfaces. | Use Scenario: Implementing 2nd- or 4th-order low-pass filters in audio preamplifiers or motor control feedback paths. IC Role / Device Role / Timing Role: Each amplifier configures as unity-gain buffer, Sallen-Key stage, or multiple-feedback section - leveraging internal compensation for predictable roll-off. Use Value: 1 MHz bandwidth and 0.5 V/µs slew rate support filter cutoff frequencies up to ~100 kHz with minimal phase distortion. |
| DC Precision Instrumentation | Industrial Process Control Loops |
Use Scenario: Building calibrated voltage references, programmable gain stages, or zero-drift integrators in laboratory-grade multimeters and data loggers. IC Role / Device Role / Timing Role: Four independent amplifiers execute simultaneous functions: input scaling, level shifting, noise filtering, and output buffering - minimizing inter-channel drift. Use Value: ≤50 nA input offset current and ≥70 dB CMRR ensure stable DC performance even with high-impedance sources and noisy plant environments. | Use Scenario: Closed-loop control of temperature, flow, or position using analog PID circuits in PLC I/O modules and HVAC controllers. IC Role / Device Role / Timing Role: Configured as error amplifier, integrator, derivative stage, and output driver - all within one SOIC-14 footprint. Use Value: Unlimited output short-circuit duration and input overload protection sustain operation during actuator faults or wiring errors without component failure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM324DR | Single-supply operation (3–32 V), lower slew rate (0.4 V/µs), higher input offset (7 mV max), no dual-supply symmetry. | Preferred for battery-powered or microcontroller-based systems where negative rail is unavailable. | Select LM324DR only when single-rail operation is mandatory and ±12 V swing is not required. |
| TL084CDR | JFET-input architecture, higher slew rate (13 V/µs), wider bandwidth (3 MHz), higher input impedance (>10¹² Ω), but requires ±4 V minimum supply. | Better suited for high-frequency AC coupling, photodiode transimpedance, or high-Z sensor interfaces demanding low bias current. | Choose TL084CDR when input bias current <30 pA and bandwidth >500 kHz are critical - not for DC-precision-only use cases. |
Compared with LM348DG4, LM324DR trades dual-supply flexibility and rail-symmetric performance for single-rail convenience, while TL084CDR offers superior speed and input impedance at the cost of increased supply sensitivity and reduced DC accuracy in low-frequency applications.
Availability
LM348DG4 is available at Aetrix Electronics and suitable for industrial automation, test equipment, and analog signal processing applications requiring stable component supply, long-term manufacturability, and drop-in compatibility with legacy µA741-derived designs.
Supply support for LM348DG4 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 company headquartered in Dallas, Texas, delivering analog, embedded processing, and logic solutions for industrial, automotive, and consumer markets since 1930.
The LM348DG4 belongs to TI's legacy linear amplifier product line, engineered for robustness, interoperability, and ease of adoption in cost-sensitive, high-reliability analog systems where proven performance outweighs cutting-edge specs.
FAQ
What is the operating temperature range for the LM348DG4?
The LM348DG4 is specified for operation from 0°C to 70°C ambient temperature. This commercial-grade range aligns with its SOIC-14 packaging and makes it suitable for office equipment, consumer electronics, and non-extreme industrial control panels. It is distinct from the LM248 (–25°C to 85°C) and LM148 (–55°C to 125°C), and thermal derating is required above 70°C ambient.
Does the LM348DG4 require external compensation capacitors?
No, the LM348DG4 does not require external compensation capacitors. It is internally compensated for unity-gain stability, allowing direct use in voltage-follower, inverting, and non-inverting configurations without added components. This simplifies layout and ensures consistent performance across units, unlike decompensated op-amps that mandate external capacitance for stability.
Can the LM348DG4 replace the LM741 in a quad configuration?
The LM348DG4 is not a direct replacement for a single LM741, but it integrates four independent amplifiers whose individual performance closely matches the µA741 - including similar input offset, slew rate, and gain-bandwidth product. While the LM741 is a single op-amp in an 8-pin package, the LM348DG4 provides quad functionality in 14-pin SOIC, enabling consolidation of four LM741-based stages into one device.
What is the maximum output current capability of the LM348DG4?
The LM348DG4 delivers ±25 mA short-circuit output current per amplifier, as specified under "Short-circuit output current" in the electrical characteristics table. This rating applies under typical conditions (TA = 25°C, VCC± = ±15 V) and reflects peak pulsed capability; continuous output current should be limited by thermal constraints - especially given its 86°C/W θJA in SOIC-14 packaging.
Is the LM348DG4 RoHS compliant and lead-free?
Yes, the LM348DG4 is RoHS compliant and lead-free. According to TI's Packaging Information Addendum, it carries a "Green (RoHS & no Sb/Br)" eco plan with "NIPDAU" (nickel-palladium-gold) lead finish and meets JEDEC MSL Level-1 moisture sensitivity classification. It is qualified for standard Pb-free reflow processes with a peak temperature of 260°C.
LM348DG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 4
- Output Type:
- -
- Slew Rate:
- 0.5V/µs
- Gain Bandwidth Product:
- 1 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 30 nA
- Voltage - Input Offset:
- 1 mV
- Current - Supply:
- 2.4mA (x4 Channels)
- Current - Output / Channel:
- 25 mA
- Voltage - Supply Span (Min):
- 8 V
- Voltage - Supply Span (Max):
- 36 V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-SOIC
LM348DG4 FAQ
1.How can I place an order for LM348DG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM348DG4 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 LM348DG4 reliable?
The price and inventory of LM348DG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM348DG4 is usually 5 days.
3.What payment methods are accepted for LM348DG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM348DG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM348DG4?
LM348DG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM348DG4 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 LM348DG4?
For technical support, including LM348DG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM348DG4 requirements.
6.How does Aetrix verify that LM348DG4 is sourced from the original manufacturer or authorized distributors?
All LM348DG4 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 LM348DG4 meets industry standards.
7.What is the process for return or replacement of LM348DG4?
All LM348DG4 units undergo pre-shipment inspection (PSI). If there is an issue with LM348DG4, 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 LM348DG4 part is unused and in its original packaging.
Return procedure for LM348DG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM348DG4 Tags
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LM358DT
STMicroelectronics
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LM358DR
Texas Instruments
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LM2904DR
Texas Instruments
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LM358ADR
Texas Instruments
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LM2904DGKR
Texas Instruments
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LM324DR
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MCP6006T-E/OT
Microchip Technology
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MCP6006UT-E/OT
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LM324PWR
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LM2902PWR
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LM2902DR
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LM358P
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