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Texas Instruments LM224J
- Part No.:
- LM224J
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-CDIP (0.300", 7.62mm)
- Datasheet:
-
LM224J.pdf
- Description:
- IC OPAMP GP 4 CIRCUIT 14CDIP
- Quantity:
- Payment:
- Shipping:
Inventory:178
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Product details
Overview
LM224J from Texas Instruments is a low-power, quad operational amplifier designed for single-supply operation (3 V to 32 V) with internally compensated unity-gain stability, 1 MHz bandwidth, 100 dB DC voltage gain, and rail-to-rail input common-mode range including ground - widely used in transducer amplification and DC gain blocks for industrial sensor interfaces.
For engineers reviewing the LM224J datasheet, LM224J pinout, LM224J application, or LM224J equivalent, this page delivers verified specifications, package mapping (CDIP-14), functional pin roles, real-world use cases, and two validated alternative parts - all grounded in TI's official SNOSC16D datasheet (Rev. January 2015).
Technical Context
The LM224J implements a PNP-input stage enabling true ground-sensing capability and differential input voltage tolerance up to ±32 V. Its class-A/B output stage supports both sourcing and sinking (up to 40 mA short-circuit current), while internal frequency compensation ensures stable unity-gain operation without external components.
Temperature-compensated bias current (45 nA typ.) and offset voltage (2 mV typ.) enable consistent performance across −25°C to +85°C operating junction temperature, with supply current independent of voltage magnitude - critical for battery-powered and wide-input-voltage industrial systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | Single supply: 3 V to 32 V; dual supply: ±1.5 V to ±16 V - enables direct interface with 5 V digital logic and eliminates need for split supplies. |
| Unity-Gain Bandwidth | 1 MHz - supports medium-speed signal conditioning (e.g., sensor outputs, audio preamps) without external compensation. |
| DC Voltage Gain | 100 dB - provides high open-loop precision for accurate closed-loop gain setting in instrumentation amplifiers. |
| Input Offset Voltage | 2 mV (typ.) - ensures low DC error in precision DC gain blocks and transducer amplifiers without trimming. |
| Supply Current per Amplifier | 700 μA (typ.) - enables four op amps in one package with minimal power impact in portable or energy-constrained designs. |
| Input Common-Mode Range | 0 V to V+ − 1.5 V - allows direct sensing of signals referenced to ground, simplifying level-shifting in single-supply systems. |
| Output Voltage Swing | 0 V to V+ − 1.5 V (RL = 2 kΩ) - delivers near-rail output drive for interfacing with ADCs and logic inputs. |
Pinout & Package
LM224J is housed in a 14-pin Ceramic Dual-In-Line Package (CDIP) with body size 19.56 mm × 6.67 mm, rated for military-grade reliability and extended temperature operation (−25°C to +85°C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 7, 8, 14 | Output (Ch1–Ch4) | Amplifier output terminals capable of sourcing/sinking up to 40 mA; swing to within 1.5 V of V+ and to ground. |
| 2, 6, 9, 13 | Inverting Input (Ch1–Ch4) | Differential input pins with PNP front-end; accept signals down to −0.3 V (25°C) and tolerate differential voltages beyond V+. |
| 3, 5, 10, 12 | Noninverting Input (Ch1–Ch4) | Ground-referenced inputs supporting 0 V common-mode; no external biasing required in single-supply configurations. |
| 4 | Positive Supply (V+) | Primary power rail for all four amplifiers; accepts 3 V to 32 V DC with supply current independent of voltage level. |
| 11 | Ground / Negative Supply (GND) | Reference node for single-supply operation or negative rail in dual-supply mode; input common-mode includes this pin. |
Key Features
| Feature | Design Value |
|---|---|
| Internally frequency compensated | Stable unity-gain operation without external compensation capacitors - reduces BOM count and layout sensitivity. |
| Input common-mode range includes ground | Enables direct connection of ground-referenced sensors (e.g., thermocouples, strain gauges) without level-shifting circuitry. |
| Low input bias current (45 nA) | Minimizes voltage error across high-impedance sources like photodiodes or pH electrodes in precision measurement paths. |
| Rail-to-rail input and output swing | Maximizes dynamic range in 5 V or 3.3 V systems - critical for driving SAR ADCs and interfacing with CMOS/TTL logic. |
| Temperature-compensated offset & bias | Maintains stable DC accuracy over −25°C to +85°C ambient - essential for uncalibrated industrial control loops. |
Applications
| Transducer Amplification | DC Gain Block |
|---|---|
Use Scenario: Amplifying low-level mV-range outputs from load cells, RTDs, or pressure sensors in factory automation PLC modules. IC Role / Device Role / Timing Role: Quad op amp configured as precision non-inverting amplifier (G = 100) and buffer, operating from 24 V single supply. Use Value: Ground-sensing inputs eliminate external bias networks; 2 mV offset ensures <±1 LSB error in 12-bit ADC front-ends. |
Use Scenario: Providing fixed, stable gain stages in analog signal chains for motor current sensing and feedback control. IC Role / Device Role / Timing Role: Four independent DC-coupled amplifiers delivering G = 10, G = 20, G = 50, and unity-gain buffering on one die. Use Value: 100 dB open-loop gain guarantees <0.1% gain error at G = 50; 700 μA per channel enables multi-stage design without thermal derating. |
| Single-Supply Sensor Interface | Industrial Logic-Level Translation |
Use Scenario: Conditioning 0–5 V analog outputs from industrial IO modules into 0–3.3 V ranges compatible with microcontroller ADCs. IC Role / Device Role / Timing Role: Rail-to-rail I/O op amp used in attenuator + level-shift configuration, powered from 5 V supply. Use Value: Input common-mode down to 0 V and output swing to 0 V allow full-scale translation without external charge pumps or negative rails. |
Use Scenario: Driving TTL/CMOS loads (e.g., optocouplers, relay drivers) from 24 V field-side signals in programmable logic controllers. IC Role / Device Role / Timing Role: Voltage follower or comparator with hysteresis, using LM224J's robust output stage (40 mA sink/source). Use Value: Output can directly switch 24 V relay coils via external transistor; input protection tolerates −0.3 V transients without latch-up. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM324N | Same architecture but rated for 0°C to +70°C only; higher input offset (7 mV max vs. 5 mV max for LM224J); identical pinout and electrical specs at room temp. | Suitable for commercial-grade consumer electronics; not qualified for industrial ambient (−25°C to +85°C) or extended storage. | Select LM324N only when cost is primary and temperature range is limited to 0–70°C. |
| LM2902N | Identical functionality and pinout; wider operating temperature (−40°C to +85°C); lower PSRR (50 dB min vs. 65 dB min) and CMRR (50 dB min vs. 70 dB min) at full range. | Better suited for automotive under-hood environments; reduced AC rejection may require additional filtering in noisy industrial settings. | Choose LM2902N when extended low-temp operation is needed and PSRR/CMRR degradation is acceptable. |
Compared with LM324N and LM2902N, the LM224J offers the optimal balance of industrial temperature rating (−25°C to +85°C), guaranteed 2 mV offset, and 65 dB PSRR - making it the preferred choice for uncalibrated sensor signal chains where long-term DC stability matters.
Availability
LM224J is available at Aetrix Electronics and suitable for industrial sensor interfaces, PLC analog I/O modules, and battery-powered instrumentation requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LM224J 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 precision op amp design and industrial-grade reliability.
The LMx24-N series - including LM224J - was engineered specifically for robust, low-cost, single-supply analog signal conditioning in industrial control, test equipment, and sensor interface applications.
FAQ
What is the operating temperature range for the LM224J?
The LM224J is specified for an operating junction temperature range of −25°C to +85°C, making it suitable for industrial environments where ambient conditions exceed commercial-grade limits. This rating is confirmed in TI's SNOSC16D datasheet Section 6.3 and distinguishes it from the LM324N (0°C to +70°C) and LM2902N (−40°C to +85°C). The LM224J's thermal performance is validated with RθJA = 88°C/W in CDIP packaging.
Does the LM224J support true ground-referenced input operation?
Yes, the LM224J features an input common-mode voltage range that explicitly includes ground (0 V), enabling direct connection of ground-referenced transducers like thermocouples or bridge sensors without external biasing. Per Section 6.6 of the datasheet, the input common-mode range is 0 V to V+ − 1.5 V at 25°C - a defining feature of the LM224J's PNP-input architecture.
What is the maximum output current capability of the LM224J?
The LM224J can source or sink up to 40 mA per amplifier when shorted to ground at V+ = 15 V and TA = 25°C (Section 6.6, "Short Circuit to Ground"). Continuous operation near this limit requires thermal derating per Section 6.4; simultaneous shorts across multiple amplifiers risk destructive dissipation without external current-limiting resistors.
Is the LM224J pin-compatible with other LMx24 variants?
Yes, the LM224J shares identical pinout and footprint with LM124N, LM324N, and LM2902N in CDIP-14 packaging. All four devices use the same pin functions (e.g., Pin 1 = Output Ch1, Pin 2 = Inverting Input Ch1, etc.), as documented in Section 5 ("Pin Configuration and Functions") of the SNOSC16D datasheet - enabling drop-in replacement where temperature and precision requirements align.
What is the typical supply current consumption of the LM224J?
The LM224J draws 700 μA per amplifier (2.8 mA total for all four) at V+ = 5 V and TA = 25°C, and remains essentially independent of supply voltage across 3 V to 32 V (Section 1 "Features" and Section 6.6 "Supply Current"). This ultra-low quiescent current supports battery-powered instrumentation and energy-efficient industrial nodes.
LM224J 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:
- -25°C ~ 85°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 14-CDIP
LM224J FAQ
1.How can I place an order for LM224J through Aetrix?
Please submit a Request for Quotation (RFQ) for LM224J 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 LM224J reliable?
The price and inventory of LM224J are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM224J is usually 5 days.
3.What payment methods are accepted for LM224J?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM224J transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM224J?
LM224J orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM224J 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 LM224J?
For technical support, including LM224J datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM224J requirements.
6.How does Aetrix verify that LM224J is sourced from the original manufacturer or authorized distributors?
All LM224J 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 LM224J meets industry standards.
7.What is the process for return or replacement of LM224J?
All LM224J units undergo pre-shipment inspection (PSI). If there is an issue with LM224J, 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 LM224J part is unused and in its original packaging.
Return procedure for LM224J:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM224J Tags
-
LM358DT
STMicroelectronics
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LM358DR
Texas Instruments
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LM2904DR
Texas Instruments
-
LM358ADR
Texas Instruments
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LM2904DGKR
Texas Instruments
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LM324DR
Texas Instruments
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MCP6006T-E/OT
Microchip Technology
-
MCP6006UT-E/OT
Microchip Technology
-
LM324PWR
Texas Instruments
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LM2902PWR
Texas Instruments
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LM2902DR
Texas Instruments
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LM358P
Texas Instruments
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