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Texas Instruments LM348DRG4
- Part No.:
- LM348DRG4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM348DRG4.pdf
- Description:
- IC OPAMP GP 4 CIRCUIT 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,990
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Product details
Overview
LM348DRG4 from Texas Instruments is a quadruple, independent, high-gain, internally compensated operational amplifier designed for general-purpose analog signal conditioning. It delivers 1 MHz unity-gain bandwidth, ±12 V maximum peak output swing (RL ≥ 10 kΩ), 0.5 V/µs slew rate, 70 dB minimum common-mode rejection ratio, and operates across 0°C to 70°C ambient temperature - suitable for industrial sensor front-ends and legacy instrumentation systems.
For engineers reviewing the LM348DRG4 datasheet, LM348DRG4 pinout, LM348DRG4 application, or LM348DRG4 equivalent, key selection considerations include its SOIC-14 package, ±15 V supply compatibility, low input offset voltage (≤6 mV), and interchangeability with LM148/LM248 in non-critical temperature environments.
Technical Context
The LM348DRG4 integrates four independent op-amps sharing a common dual-supply rail configuration (VCC+, VCC–). Each amplifier features Class AB output stage, input/output overload protection, and internal frequency compensation enabling stable unity-gain operation without external components.
It exhibits low input bias current (≤200 nA typ at 25°C), low input offset current (≤50 nA typ), and maintains ≥25 V/mV large-signal differential voltage amplification across its full operating temperature range - supporting precision DC-coupled gain stages where thermal drift must remain bounded.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | ±4 V to ±18 V - supports standard ±15 V rails and lower-voltage industrial systems down to ±4 V. |
| Unity-Gain Bandwidth | 1 MHz - enables stable closed-loop operation up to audio frequencies with minimal phase lag. |
| Slew Rate | 0.5 V/µs - limits full-power bandwidth to ~80 kHz at ±10 V output swing; sufficient for DC–100 kHz signal conditioning. |
| Input Offset Voltage | ≤6 mV at 25°C - sets worst-case DC error floor in precision inverting/non-inverting configurations. |
| Common-Mode Input Range | ±12 V - allows inputs to operate within 3 V of either rail, compatible with most sensor output ranges. |
| Output Short-Circuit Duration | Unlimited - permits robust fault tolerance during transient overloads without latch-up or damage. |
| Operating Temperature | 0°C to 70°C - qualified for commercial-grade applications including test equipment and embedded controls. |
Pinout & Package
LM348DRG4 is housed in a 14-pin SOIC (D) package with 1.27 mm pitch, 8.65 mm × 3.91 mm body dimensions, and RoHS-compliant NiPdAu lead finish. Thermal resistance θJA is 86°C/W, supporting moderate power dissipation in compact PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Amplifier 1 Output | Single-ended voltage source driving feedback networks or downstream stages. |
| 2 | Amplifier 1 Inverting Input | High-impedance node accepting feedback or signal inversion paths. |
| 3 | Amplifier 1 Non-Inverting Input | High-impedance node for reference or sensor signal injection. |
| 4 | VCC+ | Positive supply rail connection shared by all four amplifiers. |
| 5 | Amplifier 2 Non-Inverting Input | Independent input for second op-amp channel; no internal coupling. |
| 6 | Amplifier 2 Inverting Input | Independent inverting node for second amplifier's feedback loop. |
| 7 | Amplifier 2 Output | Dedicated output for second amplifier; electrically isolated from others. |
| 8 | VCC– | Negative supply rail connection shared across all amplifiers. |
| 9 | Amplifier 3 Non-Inverting Input | Third amplifier's positive input; fully decoupled from other channels. |
| 10 | Amplifier 3 Inverting Input | Third amplifier's negative input; supports individual gain configuration. |
| 11 | Amplifier 3 Output | Output of third op-amp; usable for multi-channel signal processing. |
| 12 | Amplifier 4 Non-Inverting Input | Fourth amplifier's positive input; enables quad-channel parallel operation. |
| 13 | Amplifier 4 Inverting Input | Fourth amplifier's negative input; supports independent feedback design. |
| 14 | Amplifier 4 Output | Final output channel; completes full quad-op-amp functionality in one IC. |
Key Features
| Feature | Design Value |
|---|---|
| Quadruple independent amplifiers | Four functionally isolated op-amps in one SOIC-14 package reduce board space and interconnect complexity. |
| Internally compensated | Eliminates need for external compensation capacitors, simplifying layout and reducing BOM count. |
| Class AB output stage | Delivers low crossover distortion and continuous output current capability up to ±25 mA short-circuit. |
| Input/output overload protection | Prevents latch-up or parametric shift during transient overvoltage or short-circuit events. |
| Interchangeable with LM148/LM248 | Enables drop-in replacement in existing designs using same pinout and functional behavior. |
Applications
| Industrial Sensor Signal Conditioning | Legacy Test Equipment Amplifier Stages |
|---|---|
|
Use Scenario: Amplifying low-level outputs from RTDs, thermocouples, and strain gauges in PLC analog input modules. IC Role / Device Role / Timing Role: Quad op-amp provides simultaneous gain, filtering, and level-shifting for four independent sensor channels. Use Value: Enables single-chip implementation of multi-channel analog front-end with matched DC performance across channels. |
Use Scenario: Replacing aging µA741-based amplifier sections in oscilloscope vertical deflection circuits and function generator outputs. IC Role / Device Role / Timing Role: Acts as direct functional substitute for obsolete single op-amps while consolidating four functions per package. Use Value: Reduces component count and improves long-term supply continuity without redesigning PCB layout. |
| DC Motor Current Sensing | Audio Pre-Amplifier Buffers |
|
Use Scenario: Measuring bidirectional motor current via shunt resistor in H-bridge driver feedback loops. IC Role / Device Role / Timing Role: Configured as differential amplifier to reject common-mode noise from switching power stages. Use Value: Delivers stable 70 dB CMRR at DC and low frequencies, ensuring accurate current measurement under PWM noise. |
Use Scenario: Providing unity-gain buffering between line-level audio sources and ADC inputs in data acquisition systems. IC Role / Device Role / Timing Role: Serves as low-distortion voltage follower with 0.5 V/µs slew rate adequate for 20 kHz full-scale signals. Use Value: Maintains signal integrity with ≤6 mV input offset, minimizing DC bias errors in AC-coupled audio paths. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM348D | Same SOIC-14 package, identical electrical specs, but shipped in tube (50 pcs) vs. tape-and-reel (2500 pcs). | No functional difference; suited for prototyping or low-volume production where reel handling is impractical. | Select LM348D for bench evaluation or small-batch builds requiring manual placement. |
| LM248DR | Identical pinout and architecture, but rated for –25°C to 85°C industrial temperature range and higher input offset voltage (≤7.5 mV). | Better thermal stability for extended outdoor or factory-floor deployments where ambient exceeds 70°C. | Choose LM248DR when operating beyond 70°C or requiring wider temperature qualification without layout change. |
Compared with LM348DRG4, LM348D offers identical performance in smaller packaging formats ideal for development, while LM248DR extends operational reliability into industrial temperature zones - both retain full pin compatibility and require no schematic or layout modification.
Availability
LM348DRG4 is available at Aetrix Electronics and suitable for industrial sensor interfaces, legacy test equipment upgrades, and DC motor control systems requiring stable component supply with long lifecycle visibility.
Supply support for LM348DRG4 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 and embedded processing technologies, with decades of heritage in precision linear ICs.
The LM348DRG4 belongs to TI's legacy general-purpose op-amp product line, engineered for cost-effective, reliable analog signal conditioning in commercial-grade applications where proven performance outweighs cutting-edge speed or power efficiency.
FAQ
What is the maximum supply voltage rating for LM348DRG4?
The LM348DRG4 supports a maximum supply voltage of ±18 V across VCC+ and VCC– terminals. Exceeding this limit risks permanent damage, as specified in the absolute maximum ratings table. Operation at ±15 V is recommended for optimal performance and reliability, aligning with standard lab power supplies and legacy system designs that use the LM348DRG4.
Is LM348DRG4 pin-compatible with LM148 and LM248?
Yes, LM348DRG4 is pin-compatible with LM148 and LM248 in SOIC-14 (D) and PDIP-14 (N) packages. All three share identical pin assignments, internal architecture, and functional behavior. However, LM148 is rated for –55°C to 125°C and LM248 for –25°C to 85°C, whereas LM348DRG4 is specified for 0°C to 70°C - making it suitable for commercial applications where extended temperature range is not required.
Does LM348DRG4 require external compensation capacitors?
No, LM348DRG4 does not require external compensation capacitors. It features internal frequency compensation optimized for stable unity-gain operation, as confirmed in the device description and electrical characteristics tables. This eliminates the need for external components in standard inverting, non-inverting, and voltage-follower configurations - simplifying design and improving layout robustness compared to decompensated op-amps.
What is the input offset voltage specification for LM348DRG4?
The LM348DRG4 has a maximum input offset voltage of 6 mV at 25°C, with typical value of 1 mV. Over the full 0°C to 70°C operating range, the max remains 6 mV. This parameter directly impacts DC accuracy in precision gain stages and integrators; users should account for this worst-case value when calculating total system error budgets involving LM348DRG4.
Can LM348DRG4 drive capacitive loads without instability?
LM348DRG4 is not explicitly characterized for capacitive load drive in the datasheet. While its internal compensation ensures stability with purely resistive feedback, driving >100 pF directly may induce peaking or oscillation. For capacitive loads, TI recommends adding a small series resistor (e.g., 50–100 Ω) between the output and load capacitance - a practice validated in application notes for similar legacy op-amps like the LM348DRG4.
LM348DRG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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
LM348DRG4 FAQ
1.How can I place an order for LM348DRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM348DRG4 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 LM348DRG4 reliable?
The price and inventory of LM348DRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM348DRG4 is usually 5 days.
3.What payment methods are accepted for LM348DRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM348DRG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM348DRG4?
LM348DRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM348DRG4 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 LM348DRG4?
For technical support, including LM348DRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM348DRG4 requirements.
6.How does Aetrix verify that LM348DRG4 is sourced from the original manufacturer or authorized distributors?
All LM348DRG4 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 LM348DRG4 meets industry standards.
7.What is the process for return or replacement of LM348DRG4?
All LM348DRG4 units undergo pre-shipment inspection (PSI). If there is an issue with LM348DRG4, 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 LM348DRG4 part is unused and in its original packaging.
Return procedure for LM348DRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM348DRG4 Tags
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