Texas Instruments LM348NSRG4

Overview

LM348NSRG4 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, 6 mV max input offset voltage at 25°C, and operates from ±4 V to ±18 V supplies. It is widely used in industrial sensor interfaces and DC-coupled instrumentation amplifiers.

For engineers reviewing the LM348NSRG4 datasheet, LM348NSRG4 pinout, LM348NSRG4 application, or LM348NSRG4 equivalent, key selection considerations include its SO package thermal resistance (θJA = 76°C/W), guaranteed 0°C to 70°C operating range, quad-channel independence, and compatibility with legacy µA741-based designs requiring low supply current (2.4–4.5 mA typ for four amps).

Technical Context

The LM348NSRG4 implements four fully independent op-amp channels sharing only common power rails. Each channel features Class AB output stage, internal frequency compensation, and input/output overload protection - enabling stable unity-gain operation without external compensation. Its differential input stage uses matched transistor pairs to achieve low input offset voltage and current.

Designed as a drop-in replacement for industry-standard LM148/LM248/LM348 variants, it maintains identical pinout and electrical behavior across temperature ranges, but is specifically rated for 0°C to 70°C operation with 6 mV max VIO and 4 nA max IIO at 25°C - tighter than LM248's –25°C to 85°C spec and LM148's –55°C to 125°C spec.

Key Specifications

Pinout & Package

The LM348NSRG4 is housed in a 14-pin SOP (Small Outline Package) with NS package drawing, measuring 8.45 mm × 10.55 mm × 2.5 mm and rated for surface-mount reflow (MSL Level-1, 260°C peak).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar quad op-amp applications.

Compared with LM348NSRG4, LM348DR offers identical performance in a thermally less efficient package, while LM248DR trades 1.5 mV higher offset and elevated bias current for broader temperature coverage - making LM348NSRG4 optimal for cost-sensitive, room-temperature industrial signal chains demanding tight DC accuracy.

Availability

LM348NSRG4 is available at Aetrix Electronics and suitable for industrial sensor interfaces, legacy analog equipment upgrades, and multi-channel active filter designs requiring stable component supply and long-term manufacturability.

Supply support for LM348NSRG4 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, specializing in analog and embedded processing technologies with over 50 years of op-amp innovation.

The LM348NSRG4 belongs to TI's legacy general-purpose op-amp product line, engineered for reliability, interoperability with µA741-based systems, and broad adoption in industrial, test, and measurement applications.

FAQ

What is the maximum operating temperature range for the LM348NSRG4?

The LM348NSRG4 is specified for operation from 0°C to 70°C ambient temperature. This commercial-grade rating distinguishes it from the LM248 (–25°C to 85°C) and LM148 (–55°C to 125°C). Exceeding 70°C ambient may cause parameter drift beyond datasheet limits, particularly in input offset voltage and supply current. The device's θJA of 76°C/W means junction temperature rises ~53°C above ambient at 700 mW dissipation - staying well below the 150°C absolute max TJ.

Does the LM348NSRG4 require external compensation capacitors?

No, the LM348NSRG4 features internal frequency compensation optimized for stable unity-gain operation. Unlike decompensated op-amps, it does not require external capacitors to prevent oscillation in standard inverting or non-inverting configurations. This simplifies design and reduces component count. However, for specialized applications like high-Q active filters or fast comparators, external compensation may still be needed - but such use falls outside the intended function of the LM348NSRG4 as a general-purpose amplifier.

Is the LM348NSRG4 pin-compatible with the LM348N PDIP version?

Yes, the LM348NSRG4 is fully pin-compatible with the LM348N in PDIP-14 and LM348D in SOIC-14 packages. All three share identical pin assignments, electrical specifications, and functional behavior. The NS package differs only in physical dimensions (8.45 mm × 10.55 mm vs. D's 6.5 mm × 9.0 mm) and thermal performance (θJA = 76°C/W vs. 86°C/W), but the pinout remains unchanged - enabling direct substitution in existing SOIC footprints designed for LM348D or LM348DR.

What is the typical supply current consumption of the LM348NSRG4?

The LM348NSRG4 draws 2.4–4.5 mA typical supply current for all four amplifiers under no-load conditions at 25°C, translating to ~0.6–1.1 mA per amplifier. This is significantly lower than the original µA741 (1.7 mA per amp) and supports energy-efficient multi-channel analog designs. Current increases slightly with output loading and temperature, remaining within 5.5 mA max across the full 0°C to 70°C range per datasheet test conditions.

Can the LM348NSRG4 drive a 2 kΩ load effectively?

Yes, the LM348NSRG4 delivers ±10 V peak output swing into a 2 kΩ load at 25°C, meeting specification across its full operating range. Its Class AB output stage provides sufficient current (±25 mA short-circuit capability) to drive such loads without clipping or excessive distortion. For sustained operation near maximum output, ensure adequate PCB copper area and thermal relief, as power dissipation reaches ~50 mW per amplifier - well within the NS package's 76°C/W thermal limit at room ambient.