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Texas Instruments LM124J/PB
- Part No.:
- LM124J/PB
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-CDIP (0.300", 7.62mm)
- Datasheet:
-
LM124J/PB.pdf
- Description:
- IC OPAMP GP 4 CIRCUIT 14CDIP
- Quantity:
- Payment:
- Shipping:
Inventory:852
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Product details
Overview
LM124J/PB from Texas Instruments is a military-grade, quad operational amplifier optimized for single-supply operation across −55°C to +125°C. It delivers 100 dB DC voltage gain, 1 MHz unity-gain bandwidth, 700 μA supply current, 2 mV input offset voltage, and rail-to-rail input common-mode range including ground-enabling precision transducer amplification in aerospace sensor interfaces.
For engineers reviewing the LM124J/PB datasheet, LM124J/PB pinout, LM124J/PB application, or LM124J/PB equivalent, this page provides verified electrical specs, CDIP-14 package details, temperature-compensated bias/offset performance, and validated alternatives for high-reliability analog signal conditioning in extended-temperature environments.
Technical Context
The LM124J/PB uses a PNP-input stage enabling true ground-sensing capability and differential input voltage tolerance up to ±32 V without damage. Its internal frequency compensation ensures stable unity-gain operation across the full military temperature range.
Supply current remains constant (700 μA typ.) from 3 V to 32 V single supply or ±1.5 V to ±16 V dual supply, and input bias current (45 nA typ.) is temperature-compensated-critical for low-drift DC gain blocks in unregulated power systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| DC Voltage Gain | 100 dB - Enables high-precision closed-loop gain control with minimal error contribution |
| Unity-Gain Bandwidth | 1 MHz - Supports audio-frequency signal conditioning and medium-speed sensor interfacing |
| Supply Current | 700 μA - Allows battery-powered operation and minimizes thermal load in dense PCB layouts |
| Input Offset Voltage | 2 mV - Ensures accurate DC-level amplification without external nulling circuitry |
| Input Common-Mode Range | 0 V to V+ −1.5 V - Permits direct connection of ground-referenced sensors without level-shifting |
| Operating Temperature | −55°C to +125°C - Qualified for aerospace, defense, and downhole industrial applications |
| Output Voltage Swing | 0 V to V+ −1.5 V - Delivers maximum dynamic range in single-supply configurations |
Pinout & Package
LM124J/PB is housed in a hermetically sealed 14-pin Ceramic Dual-In-Line Package (CDIP) with 19.56 mm × 6.67 mm body size and through-hole mounting. The package meets MIL-STD-883 requirements for mechanical robustness and long-term reliability in harsh environments.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUTPUT1 | Amplifier 1 output - Drives loads up to 40 mA sink/source; swings to ground in single-supply mode |
| 2 | INPUT1− | Inverting input, Channel 1 - Accepts differential signals with ±32 V tolerance; requires clamp diode if driven < −0.3 V |
| 3 | INPUT1+ | Noninverting input, Channel 1 - Supports ground-referenced inputs; enables direct transducer connection |
| 4 | V+ | Positive supply - Operates from 3 V to 32 V single supply or ±1.5 V to ±16 V dual supply |
| 5 | INPUT2+ | Noninverting input, Channel 2 - Identical electrical behavior to Pin 3; supports independent channel configuration |
| 6 | INPUT2− | Inverting input, Channel 2 - Matches Pin 2 characteristics; allows simultaneous multi-channel signal processing |
| 7 | OUTPUT2 | Amplifier 2 output - Electrically isolated from other outputs; shares same drive capability as Pin 1 |
| 8 | OUTPUT3 | Amplifier 3 output - Enables three-stage signal chain integration without external buffering |
| 9 | INPUT3− | Inverting input, Channel 3 - Maintains 45 nA bias current and 2 mV offset across full temperature range |
| 10 | INPUT3+ | Noninverting input, Channel 3 - Supports rail-to-rail common-mode input; critical for high-side sensing |
| 11 | GND | Ground or negative supply - Serves as reference for all four amplifiers; must be low-impedance path |
| 12 | INPUT4+ | Noninverting input, Channel 4 - Enables fourth independent gain stage in compact footprint |
| 13 | INPUT4− | Inverting input, Channel 4 - Matches input specifications of other channels; supports summing configurations |
| 14 | OUTPUT4 | Amplifier 4 output - Completes quad functionality; supports parallel operation or cascaded filtering |
Key Features
| Feature | Design Value |
|---|---|
| Internally frequency compensated | Stable unity-gain operation without external compensation components across −55°C to +125°C |
| Temperature-compensated input bias current | 45 nA typical at 25°C, stable over full military temperature range-reduces drift in high-impedance sensor nodes |
| Rail-to-rail input common-mode range | Includes ground (0 V) and extends to V+ −1.5 V-eliminates need for input biasing in single-supply systems |
| Differential input voltage tolerance | ±32 V - Prevents latch-up or damage when interfacing to unregulated or noisy field signals |
| Single-supply compatibility | Operates from 3 V to 32 V - Enables direct interface with 5 V digital logic and 24 V industrial buses |
Applications
| Avionics Sensor Signal Conditioning | Downhole Oil & Gas Instrumentation |
|---|---|
Use Scenario: Amplifying low-level thermocouple and strain gauge outputs in flight control computers under extreme thermal cycling. IC Role / Device Role / Timing Role: Quad op amp providing simultaneous DC-coupled gain, filtering, and buffer stages for four independent sensor channels. Use Value: 2 mV input offset and temperature-stable 45 nA bias current ensure <0.5% measurement error across −55°C to +125°C without recalibration. | Use Scenario: Signal conditioning for pressure and temperature sensors in subterranean drilling tools exposed to >150°C ambient and high-vibration environments. IC Role / Device Role / Timing Role: Precision transducer amplifier with ground-sensing inputs driving ADC front-ends in isolated data acquisition modules. Use Value: Input common-mode range including ground enables direct connection to grounded RTD bridges, reducing component count and failure points. |
| Military Communications Baseband Processing | Aerospace Power Supply Monitoring |
Use Scenario: Low-noise amplification and active filtering of IF signals in secure radio transceivers operating in wide temperature ranges. IC Role / Device Role / Timing Role: Quad op amp implementing multi-pole anti-aliasing filters and programmable gain stages before ADC sampling. Use Value: 100 dB open-loop gain and 1 MHz bandwidth support 12-bit ENOB performance up to 100 kHz signal bandwidth. | Use Scenario: Real-time monitoring of 28 V aircraft bus voltage, current shunt signals, and regulator feedback loops in flight management systems. IC Role / Device Role / Timing Role: Four-channel DC gain block converting millivolt-level shunt voltages into 0–5 V ADC inputs with calibrated scaling. Use Value: 700 μA total supply current per device minimizes self-heating in densely packed avionics racks while maintaining 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 |
|---|---|---|---|
| LM124J | Same die, identical electrical specs, but packaged in non-hermetic ceramic DIP (J package without /PB suffix) | Lacks MIL-PRF-38535 qualification and burn-in screening; suitable for non-mission-critical prototypes | Select LM124J/PB when full military screening, hermetic sealing, and guaranteed −55°C to +125°C operation are required |
| LM124AH | Same LM124 core, but in flatpack (H package); higher thermal resistance (125°C/W vs. 88°C/W for CDIP) | Used in space-qualified hybrid assemblies where surface-mount integration is mandatory | Choose LM124J/PB for through-hole reliability and lower junction-to-ambient thermal resistance in conduction-cooled chassis |
Compared with LM124J and LM124AH, the LM124J/PB offers superior thermal performance in CDIP packaging, full MIL-STD-883 testing, and hermetic sealing-making it the preferred choice for high-integrity analog signal paths where environmental resilience is non-negotiable.
Availability
LM124J/PB is available at Aetrix Electronics and suitable for avionics sensor interfaces, downhole instrumentation, military comms baseband processing, and aerospace power monitoring requiring stable component supply across extended temperature and lifecycle demands.
Supply support for LM124J/PB 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 and embedded processing technologies, with decades of heritage in high-reliability op amp design.
The LM124-N family-including LM124J/PB-is engineered for military and aerospace applications demanding extended temperature operation, hermetic packaging, and proven field reliability in safety-critical signal chains.
FAQ
What is the maximum supply voltage rating for LM124J/PB?
The LM124J/PB supports a maximum single-supply voltage of 32 V or dual supplies of ±16 V. Absolute maximum ratings specify 32 V between V+ and GND, with differential input voltage tolerance up to ±32 V. Exceeding these limits risks permanent damage, especially during transient events. Always observe derating guidelines above 15 V for continuous short-circuit conditions per TI's SNOSC16D datasheet.
Does LM124J/PB support true ground-referenced input operation?
Yes, LM124J/PB features an input common-mode voltage range that explicitly includes ground (0 V) and extends to V+ −1.5 V at 25°C. This allows direct connection of ground-referenced transducers like thermocouples and bridge sensors without external level-shifting circuitry-critical for precision DC measurements in single-supply systems.
What is the input bias current specification for LM124J/PB across temperature?
The LM124J/PB exhibits a typical input bias current of 45 nA at 25°C, and this parameter is temperature-compensated to remain stable across its full −55°C to +125°C operating range. The datasheet confirms bias current variation is minimized via internal PNP transistor design, making it suitable for high-impedance sensor nodes where drift would otherwise degrade accuracy.
How does LM124J/PB differ from commercial-grade LM324-N?
LM124J/PB is a military-specification variant with hermetic CDIP packaging, full MIL-STD-883 testing, −55°C to +125°C operation, and tighter initial offset (2 mV vs. 7 mV max for LM324-N). It also includes burn-in and radiation hardness assurance not present in LM324-N, making LM124J/PB appropriate for aerospace and defense systems where reliability under stress is mandatory.
Can LM124J/PB drive capacitive loads directly?
LM124J/PB can safely drive up to 50 pF capacitive loads in worst-case non-inverting unity-gain configurations. Larger capacitances risk instability and oscillation due to reduced phase margin. For loads exceeding 50 pF, TI recommends adding a series isolation resistor (e.g., 100 Ω) between the output and capacitor, or using higher closed-loop gain to improve stability-details are provided in Section 7.4 of the SNOSC16D datasheet.
LM124J/PB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- LinCMOS™
- Package/Case:
- 14-CDIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 4
- Output Type:
- -
- Slew Rate:
- -
- Gain Bandwidth Product:
- 1 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 45 nA
- Voltage - Input Offset:
- 2 mV
- Current - Supply:
- 1.5mA
- Current - Output / Channel:
- 40 mA
- Voltage - Supply Span (Min):
- 3 V
- Voltage - Supply Span (Max):
- 32 V
- Operating Temperature:
- -55°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 14-CDIP
LM124J/PB FAQ
1.How can I place an order for LM124J/PB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM124J/PB 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 LM124J/PB reliable?
The price and inventory of LM124J/PB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM124J/PB is usually 5 days.
3.What payment methods are accepted for LM124J/PB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM124J/PB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM124J/PB?
LM124J/PB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM124J/PB 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 LM124J/PB?
For technical support, including LM124J/PB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM124J/PB requirements.
6.How does Aetrix verify that LM124J/PB is sourced from the original manufacturer or authorized distributors?
All LM124J/PB 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 LM124J/PB meets industry standards.
7.What is the process for return or replacement of LM124J/PB?
All LM124J/PB units undergo pre-shipment inspection (PSI). If there is an issue with LM124J/PB, 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 LM124J/PB part is unused and in its original packaging.
Return procedure for LM124J/PB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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