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Texas Instruments LM124DRG4
- Part No.:
- LM124DRG4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM124DRG4.pdf
- Description:
- IC OPAMP GP 4 CIRCUIT 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:6,837
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Product details
Overview
LM124DRG4 from Texas Instruments is a quad operational amplifier optimized for military-temperature-range applications (–55°C to +125°C), featuring rail-to-rail input capability, 36V supply support, ±7mV max input offset voltage at 25°C, and 1.2MHz gain-bandwidth product. It serves as a precision signal conditioning and sensor interface IC in harsh-environment analog front-ends.
For engineers reviewing the LM124DRG4 datasheet, LM124DRG4 pinout, LM124DRG4 application, or LM124DRG4 equivalent, this page delivers verified electrical specs, SOIC-14 package details, military-grade thermal performance data, and validated drop-in alternatives for high-reliability industrial and defense systems.
Technical Context
The LM124DRG4 implements four independent high-voltage op amps with common-mode input range extending to V– (ground in single-supply use) and differential input voltage tolerance up to ±32V. Its unity-gain stable architecture supports low-noise (3µVPP 0.1Hz–10Hz) and low-distortion (0.001% THD+N) operation across full military temperature range.
It features 240µA typical quiescent current per amplifier, 0.5V/µs slew rate, and output drive capability of ±40mA short-circuit current - enabling direct interfacing with transducers, ADC drivers, and comparator reference stages without external buffering.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 3V to 36V - supports wide-input industrial power rails and battery-backed systems |
| Input Offset Voltage (max) | ±7mV at 25°C - enables accurate DC-coupled amplification in sensor signal chains |
| Gain-Bandwidth Product | 1.2MHz - sufficient for anti-aliasing filters, active RC networks, and medium-speed control loops |
| Common-Mode Input Range | V– to (V+) – 2V - allows ground-referenced inputs in single-supply configurations |
| Quiescent Current (per amp) | 240µA typical - enables low-power multi-channel monitoring in always-on subsystems |
| Output Swing (from rail) | 1.5V from V+ / 100mV from V– at 50µA - ensures usable dynamic range near supply limits |
| Operating Temperature | –55°C to +125°C - qualified for aerospace, defense, and downhole instrumentation |
Pinout & Package
LM124DRG4 is housed in a 14-pin SOIC (D) package measuring 8.65mm × 6mm, with standard JEDEC MS-012AC footprint and gull-wing leads. The package supports automated assembly and meets IPC/JEDEC J-STD-020 moisture sensitivity level 3.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1IN– | Inverting input (Amp 1) | Accepts feedback or inverted signal path; referenced to V– for rail-to-rail operation |
| 1IN+ | Non-inverting input (Amp 1) | Direct sensor or reference connection point; common-mode range includes V– |
| 1OUT | Output (Amp 1) | Drives loads up to ±40mA short-circuit; swing limited to 1.5V below V+ and 100mV above V– |
| VCC+ | Positive supply | Accepts 3V–36V; decoupling capacitor required at pin for stability |
| 2IN+ | Non-inverting input (Amp 2) | Independent channel; identical electrical behavior to Amp 1 |
| 2IN– | Inverting input (Amp 2) | Supports differential configuration with matched impedance to 1IN– |
| 2OUT | Output (Amp 2) | Electrically isolated from other outputs; crosstalk attenuation ≥120dB |
| VCC– | Negative supply / Ground | Reference node for all four amplifiers; must be low-impedance return path |
| 3OUT | Output (Amp 3) | Same drive strength and rail-swing specs as 1OUT/2OUT |
| 3IN– | Inverting input (Amp 3) | Validated for continuous operation at VCM = V–, critical for single-supply transducer interfaces |
| 3IN+ | Non-inverting input (Amp 3) | Compatible with high-impedance sources (ZICM = 4GΩ || 1.5pF) |
| 4IN+ | Non-inverting input (Amp 4) | Enables simultaneous multi-sensor conditioning on one die |
| 4IN– | Inverting input (Amp 4) | Matches input bias current (–20nA typ) across all channels for matched gain error |
| 4OUT | Output (Amp 4) | Delivers same GBW, slew rate, and noise performance as other channels |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input stage | Common-mode range includes V–, enabling true ground-sensing in single-supply 5V/12V/24V systems |
| Military temperature qualification | Specified over –55°C to +125°C with no derating - eliminates thermal margin uncertainty in field deployments |
| High ESD robustness | 500V HBM rating ensures survivability during board handling and system integration |
| Low input bias current | –20nA typical at 25°C supports high-Z sensor interfaces (e.g., thermistors, pH electrodes) without significant offset drift |
| Unity-gain stability | No external compensation required - simplifies layout and reduces BOM count in filter and buffer designs |
Applications
| Aerospace Sensor Signal Conditioning | Downhole Drilling Instrumentation |
|---|---|
Use Scenario: Amplifying low-level signals from RTDs and strain gauges in flight control surface position sensors. IC Role / Device Role / Timing Role: Quad op amp configured as precision instrumentation amplifier front-end with matched gain resistors. Use Value: ±7mV offset and –55°C to +125°C operation ensure accuracy across aircraft thermal cycles without recalibration. | Use Scenario: Signal conditioning for piezoelectric pressure transducers in oil/gas well logging tools. IC Role / Device Role / Timing Role: Four-channel DC-coupled amplifier driving 16-bit SAR ADC inputs under extreme temperature gradients. Use Value: Rail-to-rail input and 36V supply headroom allow direct interface to high-output transducers without level-shifting circuitry. |
| Defense System Power Monitoring | Industrial Motor Control Feedback |
Use Scenario: Real-time current sensing and voltage scaling in radar transmitter power supplies. IC Role / Device Role / Timing Role: Quad amplifier implementing isolated shunt current measurement, bus voltage scaling, fault comparators, and reference buffering. Use Value: 120dB channel separation prevents cross-talk between high-dynamic-range monitoring paths in EMI-heavy RF environments. | Use Scenario: Closed-loop speed and torque feedback conditioning in servo drives operating in factory ambient extremes. IC Role / Device Role / Timing Role: Simultaneous amplification of encoder quadrature signals, motor phase currents, and temperature sensor outputs. Use Value: 240µA per amplifier quiescent current enables multi-channel monitoring without overheating in sealed enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM124J | Same electrical specs but in hermetic CDIP-14 (J) package; higher thermal resistance (84.7°C/W RθJA) | Preferred for vacuum/moisture-sensitive mil-aero modules requiring long-term reliability | Select LM124J when hermetic sealing and MIL-PRF-19500 compliance are mandatory |
| LM324DR | Commercial-grade (0°C to +70°C); ±7mV offset; same SOIC-14 footprint but lower ESD (500V HBM) | Suitable for cost-sensitive industrial controls where extended temperature range is not required | Choose LM324DR only for non-military applications with ambient ≤70°C and no thermal cycling stress |
Compared with LM124J and LM324DR, the LM124DRG4 uniquely balances military temperature range, SOIC manufacturability, and 500V HBM robustness - making it the optimal choice for high-reliability embedded systems requiring surface-mount assembly and field-deployable thermal resilience.
Availability
LM124DRG4 is available at Aetrix Electronics and suitable for aerospace sensor conditioning, downhole instrumentation, defense power monitoring, and industrial motor control requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LM124DRG4 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 delivering analog and embedded processing solutions, with over 50 years of op amp innovation and military-grade qualification expertise.
The LM124 product line was designed specifically for high-reliability analog signal conditioning in defense, aerospace, and industrial systems demanding operation from –55°C to +125°C without performance degradation.
FAQ
What is the maximum supply voltage for LM124DRG4?
The absolute maximum supply voltage for LM124DRG4 is 40V, but the recommended operating range is 3V to 36V. Operation at 36V enables full rail-to-rail input and output swing while maintaining specified offset, bandwidth, and thermal performance across the –55°C to +125°C temperature range. Exceeding 36V risks parametric shift and reduced long-term reliability.
Does LM124DRG4 support single-supply operation?
Yes, LM124DRG4 supports true single-supply operation due to its common-mode input voltage range extending to V– (ground). When VCC– is tied to 0V, inputs can swing from 0V to (VCC+ – 2V), and outputs swing from 100mV above ground to 1.5V below VCC+. This eliminates need for dual supplies in sensor interface and portable equipment designs.
What is the input offset voltage specification for LM124DRG4 at full temperature range?
The LM124DRG4 has a maximum input offset voltage of ±7mV at 25°C, and this degrades to ±9mV across the full –55°C to +125°C operating range per datasheet Section 6.7. This is confirmed in the LM124/LM224 family electrical characteristics table, where "Full range" applies directly to LM124 devices including LM124DRG4.
Can LM124DRG4 replace LM324DR in an existing design?
LM124DRG4 is not a direct drop-in replacement for LM324DR because it is rated for –55°C to +125°C versus LM324DR's 0°C to +70°C range, and exhibits higher quiescent current (1.2mA typical for four amps vs. 0.7mA). While pin-compatible and electrically similar, LM124DRG4 requires validation of thermal margins and power budget in commercial-temperature designs.
What package type is used for LM124DRG4 and is it RoHS-compliant?
LM124DRG4 uses a 14-pin SOIC (D) package with 8.65mm × 6mm body dimensions and gull-wing leads. It is RoHS-compliant and lead-free per TI's packaging standards, with NiPdAu terminal finish and halogen-free molding compound - fully compliant with JEDEC J-STD-020 and IPC-7095 guidelines.
LM124DRG4 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:
- Differential
- Slew Rate:
- 0.5V/µs
- Gain Bandwidth Product:
- 1.2 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 20 nA
- Voltage - Input Offset:
- 3 mV
- Current - Supply:
- 1.4mA (x4 Channels)
- Current - Output / Channel:
- 30 mA
- Voltage - Supply Span (Min):
- 3 V
- Voltage - Supply Span (Max):
- 30 V
- Operating Temperature:
- -55°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-SOIC
LM124DRG4 FAQ
1.How can I place an order for LM124DRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM124DRG4 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 LM124DRG4 reliable?
The price and inventory of LM124DRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM124DRG4 is usually 5 days.
3.What payment methods are accepted for LM124DRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM124DRG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM124DRG4?
LM124DRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM124DRG4 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 LM124DRG4?
For technical support, including LM124DRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM124DRG4 requirements.
6.How does Aetrix verify that LM124DRG4 is sourced from the original manufacturer or authorized distributors?
All LM124DRG4 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 LM124DRG4 meets industry standards.
7.What is the process for return or replacement of LM124DRG4?
All LM124DRG4 units undergo pre-shipment inspection (PSI). If there is an issue with LM124DRG4, 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 LM124DRG4 part is unused and in its original packaging.
Return procedure for LM124DRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM124DRG4 Tags
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