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Texas Instruments LM248DR
- Part No.:
- LM248DR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM248DR.pdf
- Description:
- IC OPAMP GP 4 CIRCUIT 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:7,846
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Product details
Overview
LM248DR from Texas Instruments is a quadruple, independent, high-gain, internally compensated operational amplifier designed for industrial temperature operation (–25°C to +85°C), featuring 6 mV max input offset voltage, 0.6 mA typical supply current per amplifier, and ±12 V common-mode input range. It serves as a drop-in replacement for legacy µA741-based designs in analog signal conditioning, sensor interfacing, and active filtering circuits.
For engineers reviewing the LM248DR datasheet, LM248DR pinout, LM248DR application, or LM248DR equivalent, this page delivers verified electrical specs, SOIC-14 package details, real-world use cases, and two validated alternative parts with documented functional and thermal differences.
Technical Context
The LM248DR implements four fully independent op-amp channels in a single SOIC-14 package, each with Class AB output stage, input/output overload protection, and internal frequency compensation. Its architecture mirrors the µA741 but achieves lower input bias current (30 nA typ) and offset current (4 nA typ) at 25°C.
It operates from dual supplies of ±4 V to ±18 V, supports rail-to-rail input common-mode range up to ±12 V, and delivers ±12 V peak output swing into 10 kΩ load. Unity-gain bandwidth is 1 MHz, slew rate is 0.5 V/µs, and phase margin is 60° - ensuring stable unity-gain operation without external compensation.
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 analog rails without derating. |
| Input Offset Voltage (max) | 6 mV at 25°C - enables accurate DC-coupled amplification in precision sensor front-ends. |
| Supply Current (per amp) | 0.6 mA typ - allows low-power multi-channel analog systems with minimal thermal load. |
| Common-Mode Input Range | ±12 V - accommodates signals near supply rails in industrial transducer interfaces. |
| Unity-Gain Bandwidth | 1 MHz - sufficient for audio-band filtering, active anti-aliasing, and medium-speed control loops. |
| Slew Rate | 0.5 V/µs - limits large-signal transient response but ensures stability in uncompensated configurations. |
| Phase Margin | 60° - guarantees unconditional stability under unity-gain feedback across temperature and load. |
Pinout & Package
LM248DR is housed in a 14-pin SOIC (D) package, 3.90 mm wide, RoHS-compliant, with moisture sensitivity level (MSL) Level-1 and 260°C peak reflow tolerance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Channel 1 Output | Amplified output of first op-amp; drives loads ≥2 kΩ without instability. |
| 2 | Channel 1 Inverting Input | Inverting node for feedback configuration; high-impedance (0.8 MΩ min) input path. |
| 3 | Channel 1 Non-Inverting Input | Non-inverting node; accepts common-mode voltages up to ±12 V relative to ground. |
| 4 | Positive Supply (VCC+) | Connects to +V rail; powers all four amplifiers simultaneously. |
| 5 | Channel 2 Non-Inverting Input | Independent input for second amplifier; electrically isolated from other channels. |
| 6 | Channel 2 Inverting Input | Feedback node for second channel; matched offset and bias performance to Pin 2. |
| 7 | Channel 2 Output | Output of second op-amp; identical AC/DC specs to Pin 1. |
| 8 | Negative Supply (VCC–) | Connects to –V rail; referenced midpoint defines all input voltage limits. |
| 9 | Channel 3 Non-Inverting Input | Third amplifier input; maintains same CMRR (70 dB min) and input resistance as others. |
| 10 | Channel 3 Inverting Input | Third channel inverting node; supports same differential input voltage limit (36 V). |
| 11 | Channel 3 Output | Third op-amp output; rated for ±25 mA short-circuit current. |
| 12 | Channel 4 Non-Inverting Input | Fourth amplifier input; full-range operation matches Pins 3, 5, and 9. |
| 13 | Channel 4 Inverting Input | Fourth channel feedback node; shares same input offset current spec (4 nA typ). |
| 14 | Channel 4 Output | Final output; completes quad functionality with no crosstalk degradation (120 dB attenuation). |
Key Features
| Feature | Design Value |
|---|---|
| Interchangeable with LM148/LM348 | Pin-compatible across temperature grades - simplifies design reuse and BOM consolidation. |
| Class AB Output Stage | Eliminates crossover distortion in audio and precision DC applications without requiring external biasing. |
| Input/Output Overload Protection | Prevents latch-up or damage during transient overvoltage or short-circuit events on any channel. |
| Low Input Bias Current | 30 nA typical enables high-impedance source interfacing (e.g., pH electrodes, photodiode amps). |
| Crosstalk Attenuation | 120 dB between channels ensures independent operation in multi-signal acquisition systems. |
Applications
| Industrial Sensor Signal Conditioning | Multi-Channel Data Acquisition Front-End |
|---|---|
|
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, and level-shifting for four independent sensor channels. Use Value: 6 mV max VIO and ±12 V CMIR ensure <1% error at 100 mV full-scale inputs across –25°C to +85°C ambient. |
Use Scenario: Building 4-channel programmable gain instrumentation amplifiers for test equipment. IC Role / Device Role / Timing Role: Each LM248DR amplifier configures as PGA stage, buffer, or active filter within one IC footprint. Use Value: 120 dB inter-channel crosstalk prevents signal bleed between channels during simultaneous sampling. |
| Legacy µA741 System Upgrade | Active Analog Filter Bank |
|
Use Scenario: Replacing obsolete µA741 quad designs in field-deployed medical and industrial controllers. IC Role / Device Role / Timing Role: Direct functional replacement preserving PCB layout, bill of materials, and firmware calibration. Use Value: Identical pinout and µA741-like transfer characteristics enable drop-in upgrade without system revalidation. |
Use Scenario: Implementing 4-pole low-pass, high-pass, and band-pass filters in audio processing and communications hardware. IC Role / Device Role / Timing Role: Each amplifier forms one stage of cascaded Sallen-Key or multiple-feedback topology. Use Value: 1 MHz GBW and 60° phase margin support stable 10 kHz cutoff filters without external compensation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM348DR | Commercial temperature range (0°C to 70°C); identical SOIC-14 package and electrical specs except VIO max = 6 mV (same), but full-range VIO = 7.5 mV vs. LM248DR's 7.5 mV. | Restricted to non-industrial environments; unsuitable for extended ambient or uncontrolled enclosures. | Select LM348DR only for cost-sensitive consumer or lab-grade equipment where temperature stability is secondary. |
| LM248N | Same –25°C to +85°C rating and 6 mV VIO max, but in PDIP-14 package (80°C/W θJA vs. SOIC's 86°C/W); higher thermal resistance and larger footprint. | Preferred for prototyping, through-hole assembly, or legacy board rework where SOIC reflow is unavailable. | Choose LM248N when manual soldering, socketing, or thermal mass requirements favor DIP over surface-mount. |
Compared with LM248DR, LM348DR trades industrial temperature capability for lower cost in benign environments, while LM248N retains identical specs but sacrifices board space and thermal efficiency for through-hole compatibility - making LM248DR optimal for modern industrial SMT production.
Availability
LM248DR is available at Aetrix Electronics and suitable for industrial automation, sensor interface modules, and legacy analog system upgrades requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant sourcing.
Supply support for LM248DR 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 90 years of innovation in high-reliability components.
The LM248DR belongs to TI's legacy precision op-amp product line, engineered specifically for industrial-grade analog signal conditioning where robustness, interchangeability, and long-term supply stability are critical.
FAQ
What is the operating temperature range for the LM248DR?
The LM248DR is rated for continuous operation from –25°C to +85°C ambient temperature. This industrial temperature grade is confirmed in the ordering information table and absolute maximum ratings section of the official TI datasheet SLOS058C. The LM248DR maintains specified input offset voltage (6 mV max at 25°C, 7.5 mV max over full range), supply current, and common-mode rejection across this interval - making it suitable for factory-floor and outdoor-deployed electronics where thermal cycling occurs.
Is the LM248DR pin-compatible with the LM348DR?
Yes, the LM248DR and LM348DR share identical SOIC-14 (D) package dimensions, pin numbering, and pin functions - including VCC+, VCC–, and all eight input/output terminals for the four amplifiers. Both parts are explicitly listed as interchangeable in the TI datasheet's "Designed to Be Interchangeable With" statement. However, their operating temperature ranges differ: LM248DR supports –25°C to +85°C, while LM348DR is limited to 0°C to +70°C - a key selection factor for thermal environment validation.
What is the maximum supply voltage for the LM248DR?
The LM248DR supports a maximum dual-supply voltage of ±18 V, as stated in the "Absolute Maximum Ratings" table of the TI datasheet SLOS058C. Exceeding this limit risks permanent device damage. For reliable operation, TI recommends staying within the "Recommended Operating Conditions": ±4 V to ±18 V. At ±15 V supply, the LM248DR delivers ±12 V output swing into 10 kΩ and maintains 1 MHz unity-gain bandwidth - confirming its suitability for standard analog power rails.
Does the LM248DR require external compensation capacitors?
No, the LM248DR does not require external compensation capacitors. It is internally compensated, as confirmed in the "Description" section of the TI datasheet: "quadruple, independent, high-gain, internally compensated operational amplifiers". The 1 MHz unity-gain bandwidth, 60° phase margin, and stable step response under unity-gain feedback (Figure 1) are all achieved without external components - enabling immediate use in inverting, non-inverting, and voltage-follower configurations without stability tuning.
What is the input offset voltage specification for the LM248DR?
The LM248DR has a maximum input offset voltage of 6 mV at 25°C and 7.5 mV over its full operating temperature range (–25°C to +85°C), per the "Electrical Characteristics" table in TI's SLOS058C datasheet. This parameter is measured per amplifier under open-loop conditions with zero common-mode input voltage. The typical value is 1 mV at 25°C. These values directly impact DC accuracy in precision amplification - for example, limiting error to ≤0.06% of full-scale in a 10 V output system.
LM248DR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 14-SOIC (0.154", 3.90mm 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:
- -25°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-SOIC
LM248DR FAQ
1.How can I place an order for LM248DR through Aetrix?
Please submit a Request for Quotation (RFQ) for LM248DR 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 LM248DR reliable?
The price and inventory of LM248DR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM248DR is usually 5 days.
3.What payment methods are accepted for LM248DR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM248DR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM248DR?
LM248DR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM248DR 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 LM248DR?
For technical support, including LM248DR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM248DR requirements.
6.How does Aetrix verify that LM248DR is sourced from the original manufacturer or authorized distributors?
All LM248DR 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 LM248DR meets industry standards.
7.What is the process for return or replacement of LM248DR?
All LM248DR units undergo pre-shipment inspection (PSI). If there is an issue with LM248DR, 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 LM248DR part is unused and in its original packaging.
Return procedure for LM248DR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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