My Inquiry
My Account
Texas Instruments LM348NSR
- Part No.:
- LM348NSR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-SOIC (0.209", 5.30mm Width)
- Datasheet:
-
LM348NSR.pdf
- Description:
- IC OPAMP GP 4 CIRCUIT 14SO
- Quantity:
- Payment:
- Shipping:
Inventory:1,892
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LM348NSR 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 output swing (RL ≥ 10 kΩ), 0.5 V/µs slew rate, 6 mV max input offset voltage at 25°C, and operates across 0°C to 70°C ambient temperature - widely used in industrial sensor front-ends and legacy instrumentation systems.
For engineers reviewing the LM348NSR datasheet, LM348NSR pinout, LM348NSR application, or LM348NSR equivalent, key selection criteria include its SO package thermal resistance (θJA = 76°C/W), quad-amplifier supply current (2.4–4.5 mA typ), common-mode input range (±12 V), and compatibility with µA741-based designs requiring four independent op-amps in a single IC.
Technical Context
The LM348NSR implements four fully independent Class AB op-amp channels with internal frequency compensation, enabling stable unity-gain operation without external components. Each amplifier features input/output overload protection and rail-to-rail input common-mode range up to ±12 V with ±15 V supplies.
It replicates core µA741 characteristics - including low input bias current (30–200 nA), high DC open-loop gain (25–160 V/mV), and 70–90 dB CMRR - while improving on supply current drain (0.6 mA per amplifier typ) and input offset parameters versus the original µA741.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | ±4 V to ±18 V - supports dual-rail operation in legacy ±15 V systems and modern lower-voltage analog rails. |
| Unity-Gain Bandwidth | 1 MHz - enables stable amplification of audio-band and low-speed control signals without oscillation. |
| Slew Rate | 0.5 V/µs - limits large-signal transient response; suitable for DC-coupled sensors and slow feedback loops. |
| Input Offset Voltage (max) | 6 mV at 25°C - defines worst-case DC error in precision gain stages; requires trimming in sub-mV applications. |
| Common-Mode Input Range | ±12 V - allows direct connection to signals referenced to mid-supply or ground in ±15 V systems. |
| Output Short-Circuit Duration | Unlimited - permits robust fault tolerance in industrial I/O modules without external current limiting. |
| Thermal Resistance θJA | 76°C/W (NS package) - determines safe power dissipation limit (e.g., ~130 mW at TA = 70°C, TJ = 150°C). |
Pinout & Package
LM348NSR uses a 14-pin small-outline package (SO-14, TI drawing NS), measuring 8.45 mm × 10.55 mm × 2.5 mm (L×W×H), with gull-wing leads and RoHS-compliant NiPdAu finish. It is rated MSL Level-1 (unlimited floor life) and compatible with standard reflow profiles.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Amplifier 1 Output | Single-ended output node for first op-amp; drives loads ≥2 kΩ to maintain ±10 V swing. |
| 2 | Amplifier 1 Inverting Input | Inverting input terminal; high-impedance node (≥0.8 MΩ) sensitive to PCB leakage and layout parasitics. |
| 3 | Amplifier 1 Non-Inverting Input | Non-inverting input terminal; accepts common-mode voltages up to ±12 V with ±15 V supplies. |
| 4 | Negative Supply (VCC–) | Ground reference for all four amplifiers' internal circuitry; must be decoupled near pin with 0.1 µF ceramic. |
| 5 | Amplifier 2 Non-Inverting Input | Independent input for second op-amp; electrically isolated from other channels to prevent crosstalk (>120 dB). |
| 6 | Amplifier 2 Inverting Input | Inverting input for second channel; shares no internal nodes with other amplifiers. |
| 7 | Amplifier 2 Output | Second independent output; identical AC/DC specs to Pin 1; usable in parallel configurations only with external isolation. |
| 8 | Amplifier 3 Output | Third output channel; same performance as Pins 1 and 7; supports multi-stage filtering or signal distribution. |
| 9 | Amplifier 3 Inverting Input | Inverting input for third op-amp; maintains full 120 dB crosstalk attenuation from adjacent channels. |
| 10 | Amplifier 3 Non-Inverting Input | Non-inverting input for third channel; validated over full temperature range (0°C to 70°C). |
| 11 | Positive Supply (VCC+) | Power rail for all amplifiers; requires local 0.1 µF + 10 µF decoupling to suppress supply noise coupling. |
| 12 | Amplifier 4 Non-Inverting Input | Fourth independent non-inverting input; matches input bias current spec (30–200 nA) across temperature. |
| 13 | Amplifier 4 Inverting Input | Fourth inverting input; exhibits same input offset voltage distribution (≤6 mV) as other channels. |
| 14 | Amplifier 4 Output | Final output channel; capable of ±25 mA short-circuit current; supports active load driving in transducer interfaces. |
Key Features
| Feature | Design Value |
|---|---|
| Quad independent amplifiers | Four fully isolated op-amp cores in one SO-14 package - reduces board space vs. discrete µA741 implementations. |
| Internal frequency compensation | Stable unity-gain operation without external capacitors - simplifies design and eliminates tuning risk. |
| Input/Output overload protection | Prevents latch-up or permanent damage during signal transients or wiring faults in field-deployed equipment. |
| Low supply-current drain | 2.4–4.5 mA total (0.6–1.1 mA per amplifier) - extends battery life in portable instrumentation and low-power analog modules. |
| High crosstalk attenuation | 120 dB (1 Hz–20 kHz) - ensures channel independence in multi-channel data acquisition and active filter banks. |
Applications
| Industrial Sensor Signal Conditioning | Legacy Instrumentation Amplifier Stages |
|---|---|
|
Use Scenario: Amplifying low-level outputs from RTDs, strain gauges, and thermocouples in PLC analog input modules. IC Role / Device Role / Timing Role: Quad op-amp provides simultaneous gain, filtering, level-shifting, and buffer functions across four sensor channels. Use Value: Enables compact 4-channel analog front-end with matched DC specs (6 mV VIO max) and thermal stability (0°C to 70°C). |
Use Scenario: Replacing aging µA741-based circuits in oscilloscopes, function generators, and calibration standards. IC Role / Device Role / Timing Role: Drop-in functional replacement for four discrete µA741s - preserves existing schematics and layouts. Use Value: Reduces component count by 75%, lowers assembly cost, and improves inter-channel matching over discrete solutions. |
| Multi-Stage Active Filters | DC Motor Current Feedback Loops |
|
Use Scenario: Implementing 4-pole low-pass or band-pass filters in audio test equipment and vibration analyzers. IC Role / Device Role / Timing Role: Each amplifier serves as one filter stage (e.g., Sallen-Key topology) with 1 MHz GBW and 0.5 V/µs slew rate. Use Value: Maintains phase linearity and amplitude accuracy up to ~100 kHz; avoids instability from external compensation. |
Use Scenario: Isolating and scaling shunt-resistor voltage drops in H-bridge motor drivers for closed-loop current control. IC Role / Device Role / Timing Role: One amplifier buffers the shunt signal, another performs differential sensing, third offsets, fourth drives ADC input. Use Value: Supports real-time current monitoring with ≤6 mV offset error - critical for torque regulation and overcurrent shutdown accuracy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM348D | Same electrical specs and pinout; differs only in SOIC-D package (θJA = 86°C/W vs. NS's 76°C/W) and tape/reel quantity (50 vs. 2000). | Preferred for prototyping or low-volume builds where smaller reels or manual placement are needed. | Select LM348D when board layout accommodates D-package footprint and thermal margin exceeds 10°C/W benefit of NS variant. |
| LM248DR | Identical SOIC-D package and pinout; wider operating range (–25°C to 85°C) but higher max input offset (7.5 mV) and bias current (400 nA). | Suitable for extended-temperature industrial environments where LM348NSR's 0°C–70°C range is insufficient. | Choose LM248DR only if ambient temperature exceeds 70°C; otherwise LM348NSR offers tighter DC specs at same price point. |
Compared with LM348D and LM248DR, LM348NSR provides the lowest thermal resistance among SO-packaged variants and the tightest input offset specification within its temperature grade - making it optimal for cost-sensitive, thermally constrained, or precision DC-coupled designs.
Availability
LM348NSR is available at Aetrix Electronics and suitable for industrial sensor interfaces, legacy instrumentation upgrades, and multi-channel analog signal processing requiring stable component supply and long-term manufacturability.
Supply support for LM348NSR 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 digital signal technologies, with over 50 years of op-amp innovation and manufacturing excellence.
The LM348NSR belongs to TI's legacy general-purpose op-amp product line, engineered for reliability, interoperability with µA741 designs, and broad deployment in industrial, test, and measurement equipment.
FAQ
What is the maximum operating temperature range for the LM348NSR?
The LM348NSR is specified for operation from 0°C to 70°C ambient temperature. This commercial-grade range aligns with standard industrial control and instrumentation environments. Its absolute maximum junction temperature is 150°C, and thermal design must ensure that under worst-case power dissipation (e.g., 4.5 mA × 30 V = 135 mW), the junction stays within limits using the NS package's θJA of 76°C/W. The LM348NSR does not support extended or military temperature grades.
Is the LM348NSR pin-compatible with the LM348N PDIP version?
Yes, the LM348NSR is pin-compatible with the LM348N. Both share identical 14-pin functionality and signal mapping: Pins 1–7 and 8–14 correspond directly to amplifier outputs, inputs, and supply rails in the same order. The only difference is package type - NS is SO-14 surface-mount, N is 14-pin PDIP through-hole - so PCB layout must match the respective footprint, but schematic connectivity remains unchanged.
Does the LM348NSR require external compensation capacitors?
No, the LM348NSR does not require external compensation capacitors. It is internally compensated for unity-gain stability, as confirmed in the datasheet's "designed to be interchangeable with industry standard LM148, LM248, and LM348" statement and verified by its 1 MHz unity-gain bandwidth and 60° phase margin. External capacitors may be added only for specialized applications like decompensated high-speed configurations - which are unsupported and invalid for LM348NSR.
What is the typical supply current consumption of the LM348NSR?
The LM348NSR draws 2.4–4.5 mA total supply current (ICC) across all four amplifiers under no-load conditions at 25°C, translating to 0.6–1.1 mA per amplifier. This value increases slightly with output loading and temperature but remains well below older µA741 equivalents. At ±15 V supplies, this equates to ~67.5 mW quiescent power - a key advantage for thermally constrained or energy-sensitive analog subsystems.
Can the LM348NSR drive a 2-kΩ load while maintaining full output swing?
Yes, the LM348NSR delivers ±10 V peak output voltage swing into a 2-kΩ load at 25°C, as specified in the "Maximum peak output voltage swing" parameter. This meets typical requirements for driving ADC references, analog multiplexers, or subsequent op-amp stages. For loads <2 kΩ, output swing compresses due to internal Class AB output stage limitations; for precision DC applications, load impedance should remain ≥10 kΩ to achieve the full ±12 V swing.
LM348NSR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 14-SOIC (0.209", 5.30mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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-SO
LM348NSR FAQ
1.How can I place an order for LM348NSR through Aetrix?
Please submit a Request for Quotation (RFQ) for LM348NSR 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 LM348NSR reliable?
The price and inventory of LM348NSR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM348NSR is usually 5 days.
3.What payment methods are accepted for LM348NSR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM348NSR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM348NSR?
LM348NSR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM348NSR 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 LM348NSR?
For technical support, including LM348NSR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM348NSR requirements.
6.How does Aetrix verify that LM348NSR is sourced from the original manufacturer or authorized distributors?
All LM348NSR 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 LM348NSR meets industry standards.
7.What is the process for return or replacement of LM348NSR?
All LM348NSR units undergo pre-shipment inspection (PSI). If there is an issue with LM348NSR, 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 LM348NSR part is unused and in its original packaging.
Return procedure for LM348NSR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM348NSR 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…
