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Home > Products > Integrated Circuits (ICs) > Linear > Instrumentation, Op Amps, Buffer Amps

Texas Instruments LM248D

Name: LM248D
Brand: Texas Instruments
SKU: LM248D
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: LM248D

Manufacturer:: Texas Instruments

Category:: Instrumentation, Op Amps, Buffer Amps

Package:: 14-SOIC (0.154", 3.90mm Width)

Datasheet:: LM248D.pdf

Description:: IC OPAMP GP 4 CIRCUIT 14SOIC

Quantity:: RFQ Add To RFQ list

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Product details

Overview

LM248D from STMicroelectronics is a quad bipolar operational amplifier with pin compatibility to LM124/LM224/LM324 and functional equivalence to UA741. It delivers 1.3 MHz gain-bandwidth product, 1 mV input offset voltage, 2 nA input offset current, and operates across –40 °C to +105 °C in SO14 package for industrial signal conditioning and sensor interface applications.

For engineers reviewing the LM248D datasheet, LM248D pinout, LM248D application, or LM248D equivalent, key selection criteria include supply current per amplifier (0.53 mA), channel isolation (120 dB), output swing (±12 V at 10 kΩ), and thermal stability over extended temperature range - critical for multi-channel analog front-ends requiring matched performance.

Technical Context

The LM248D integrates four independent, internally compensated op-amps with Class AB output stages eliminating crossover distortion. Each amplifier features independently biased circuitry and layout techniques minimizing thermal coupling, enabling high channel-to-channel isolation (120 dB) and stable DC precision (1 mV V_IO, 30 nA I_IB) across temperature.

It maintains full functional equivalence to UA741 while reducing total quiescent current to 2.1–3.6 mA for all four amplifiers - matching the supply draw of a single UA741. Input common-mode range extends to ±12 V at ±15 V supplies, and large-signal voltage gain exceeds 50 V/mV under 2 kΩ load conditions.

Key Specifications

Parameter	Value and Actual Design Meaning
Gain bandwidth product	1.3 MHz - sets unity-gain stable bandwidth limit for closed-loop configurations up to ~1 MHz.
Input offset voltage	1 mV (typ) - enables ≤10 mV error in 10× gain DC-coupled sensor amplification at room temperature.
Supply current (all amps)	2.1–3.6 mA - allows four-channel operation within same power budget as one UA741 amplifier.
Channel separation	120 dB - prevents crosstalk-induced signal corruption in multi-channel data acquisition systems.
Output voltage swing	±12 V (RL ≥ 10 kΩ) - supports rail-to-rail compatible signal handling with ±15 V supplies.
Common-mode rejection	70–110 dB - ensures robust noise immunity in differential sensing with mismatched source impedances.
Slew rate	0.25–0.5 V/μs - limits maximum undistorted 10 kHz sine wave amplitude to ~1.6 Vpp at unity gain.

Pinout & Package

LM248D is housed in a 14-pin Small Outline (SO14) package with standard JEDEC MO-153 dimensions: 8.55–8.75 mm body length, 3.80–4.00 mm body width, 1.27 mm lead pitch, and 1.10–1.65 mm height. Pin 1 is marked by a beveled corner or dot; device orientation follows top-view convention.

Pin/Terminal	Circuit Role	Design Meaning
1	Output A	Amplifier A output - drives external load or feedback network; capable of ±12 V swing into 10 kΩ.
2	Inverting input A	High-impedance (0.8–2.5 MΩ) negative input node for A amplifier; accepts differential signals up to ±12 V.
3	Non-inverting input A	High-impedance positive input node for A amplifier; common-mode range extends to ±12 V.
4	V_CC–	Negative supply rail - connects to system ground or negative voltage; supports ±15 V dual-supply operation.
5	Non-inverting input B	Positive input for B amplifier; electrically isolated from other channels via independent biasing.
6	Inverting input B	Negative input for B amplifier; low input bias current (30 nA typ) minimizes offset drift.
7	Output B	B amplifier output; shares same slew rate (0.25–0.5 V/μs) and short-circuit protection as channel A.
8	Output C	C amplifier output - identical electrical specs to A/B; enables three independent signal paths on single IC.
9	Inverting input C	Negative input for C amplifier; input offset current (2 nA typ) ensures matched DC behavior across channels.
10	Non-inverting input C	Positive input for C amplifier; supports common-mode voltages up to ±12 V at ±15 V supply.
11	V_CC+	Positive supply rail - connects to +15 V or other positive rail; total device dissipation limited to 500 mW.
12	Non-inverting input D	Positive input for D amplifier; benefits from same 120 dB channel separation as other sections.
13	Inverting input D	Negative input for D amplifier; low input bias current reduces resistor-generated offset errors.
14	Output D	D amplifier output - completes quad configuration; supports simultaneous 4-channel buffering or filtering.

Key Features

Feature	Design Value
Class AB output stage	Eliminates crossover distortion in audio and precision DC-coupled applications without external compensation.
Independent amplifier biasing	Enables 120 dB channel separation and minimizes thermal tracking errors in multi-channel instrumentation.
Low input offset voltage (1 mV)	Reduces calibration burden in 12-bit ADC front-ends where 1 LSB = ~2.4 mV at 10 V full scale.
Pin-compatible with LM124/LM224/LM324	Allows drop-in replacement in existing designs using industry-standard quad op-amp footprints.
Extended temperature range (–40 °C to +105 °C)	Supports deployment in industrial control cabinets and automotive under-hood environments without derating.

Applications

Industrial Sensor Signal Conditioning

Multi-Channel Data Acquisition

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 providing simultaneous gain, filtering, and level-shifting for four independent sensor channels.

Use Value: 120 dB channel separation prevents cross-talk between adjacent 4–20 mA loop inputs, preserving measurement integrity.

Use Scenario: Front-end conditioning for 12-bit SAR ADCs sampling multiple analog sources in test equipment.

IC Role / Device Role / Timing Role: Buffering and driving multiplexed analog inputs while maintaining DC accuracy and settling time.

Use Value: 1 mV input offset and 0.25 V/μs slew rate enable <1 LSB error in 100 µs settling window at full-scale step.

DC Motor Current Sensing

Audio Pre-amplification

Use Scenario: Isolating and amplifying shunt voltage in H-bridge motor drivers for closed-loop current control.

IC Role / Device Role / Timing Role: Differential amplifier configured with matched external resistors to reject common-mode bus noise.

Use Value: 110 dB CMRR ensures accurate current measurement despite ±50 V common-mode transients on motor terminals.

Use Scenario: Low-noise pre-amplification of line-level audio signals before ADC conversion in embedded audio recorders.

IC Role / Device Role / Timing Role: Non-inverting gain stage with 20 dB fixed gain and 1.3 MHz bandwidth limiting ultrasonic content.

Use Value: 0.08% THD at 1 kHz and 2 Vpp output meets consumer-grade audio fidelity requirements.

Equivalent & Alternatives

The following parts are listed as comparable options for similar quad operational amplifier applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
LM348DT	Same electrical specs but rated for 0 °C to +70 °C only; lower ESD rating (200 V HBM vs. LM248D's 200 V HBM).	Restricted to commercial-temperature applications such as office equipment and non-industrial consumer devices.	Select when ambient operating temperature remains within 0–70 °C and cost sensitivity outweighs extended temperature coverage.
TL084CDR	JFET-input architecture: higher input impedance (10¹² Ω), lower input bias current (30 pA), but higher input offset voltage (3 mV) and no guaranteed 120 dB channel separation.	Better suited for high-Z sensor interfaces (e.g., piezoelectric sensors), less suitable for precision DC-coupled multi-channel matching.	Choose when ultra-low input bias current is critical and channel matching is secondary to input impedance.

Compared with LM348DT and TL084CDR, the LM248D uniquely combines industrial temperature range, UA741-equivalent behavior, and verified 120 dB channel isolation - making it optimal for space-constrained, multi-channel industrial analog systems requiring long-term DC stability.

Availability

LM248D is available at Aetrix Electronics and suitable for industrial sensor interfaces, multi-channel data acquisition systems, and DC motor current monitoring requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for LM248D 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

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing microcontrollers, power ICs, sensors, and analog components for industrial, automotive, and consumer markets.

The LM248D belongs to ST's legacy precision analog portfolio, engineered specifically for industrial signal conditioning where quad-channel integration, thermal stability, and pin compatibility with industry-standard op-amps are essential design requirements.

FAQ

Is LM248D pin-compatible with LM324?

Yes, LM248D uses the same SO14 pinout as LM324 and is functionally compatible with LM124, LM224, and LM324. All share identical pin assignments for V_CC+, V_CC–, inputs, and outputs - enabling direct PCB footprint reuse without layout changes.

What is the maximum safe supply voltage for LM248D?

The absolute maximum supply voltage is ±22 V. Operation at ±15 V is recommended for optimal performance and reliability; exceeding ±22 V risks permanent damage to internal junctions and voids warranty compliance per ST's DocID2161 Rev 5 specifications.

Does LM248D support single-supply operation?

No - LM248D is designed for dual-supply operation (±V_CC). Its input common-mode range extends to ±12 V with ±15 V supplies, but it lacks rail-to-rail input or output capability and does not specify performance with V_CC– tied to ground.

How does LM248D achieve 120 dB channel separation?

LM248D achieves 120 dB channel separation through independent biasing of each amplifier core and specialized die layout that minimizes thermal coupling and substrate crosstalk - confirmed in ST's schematic diagram and electrical characteristics table (Vo1/Vo2 = 120 dB).

LM248D 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:: -25°C ~ 85°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 14-SOIC

LM248D FAQ

1.How can I place an order for LM248D through Aetrix?

Please submit a Request for Quotation (RFQ) for LM248D 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 LM248D reliable?

The price and inventory of LM248D are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM248D is usually 5 days.

3.What payment methods are accepted for LM248D?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM248D transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for LM248D?

LM248D orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your LM248D 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 LM248D?

For technical support, including LM248D datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM248D requirements.

6.How does Aetrix verify that LM248D is sourced from the original manufacturer or authorized distributors?

All LM248D 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 LM248D meets industry standards.

7.What is the process for return or replacement of LM248D?

All LM248D units undergo pre-shipment inspection (PSI). If there is an issue with LM248D, 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 LM248D part is unused and in its original packaging.

Return procedure for LM248D:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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