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LM224DG Equivalent & Substitute Parts
Part Overview
The LM224DG is a general-purpose operational amplifier integrated circuit manufactured by onsemi, configured as a 4-circuit device in a 14-SOIC surface mount package. This component is classified as obsolete, indicating it is no longer in active production. The identification of equivalent and substitute parts is necessary to maintain design continuity and ensure component availability for applications currently utilizing the LM224DG.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Amplifier Type | General Purpose |
| Number of Circuits | 4 |
| Gain Bandwidth Product | 1 MHz |
| Current - Input Bias | 90 nA |
| Voltage - Input Offset | 2 mV |
| Current - Output / Channel | 40 mA |
| Voltage - Supply Span (Min) | 3 V |
| Voltage - Supply Span (Max) | 32 V |
| Operating Temperature | -25°C ~ 85°C |
| Package / Case | 14-SOIC (0.154", 3.90mm Width) |
| Mounting Type | Surface Mount |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
Substitute Part Grouping Explanation
Substitution of the LM224DG is determined by the following critical parameters:
Functional Equivalence Criteria:
- Number of circuits: 4 channels required
- Amplifier type: General purpose operational amplifier
- Package type: 14-SOIC surface mount configuration
- Gain bandwidth product: 1 MHz minimum
- Supply voltage range: 3 V to 32 V minimum span
Electrical Compatibility Criteria:
- Input bias current: 90 nA or lower
- Input offset voltage: 2 mV or lower
- Output current per channel: 30 mA or higher
- Operating temperature range: Must encompass -25°C to 85°C minimum
Compliance Criteria:
- Moisture sensitivity level: MSL 1 (Unlimited)
- REACH status: REACH Unaffected
- ECCN classification: EAR99
Substitute parts are grouped into direct equivalents (same base product number LM224) and upgraded alternatives (LM124 series with enhanced specifications). All listed substitutes maintain the 14-SOIC package footprint and surface mount mounting type.
Parameter Comparison
| Part Number | Manufacturer | Product Status | Gain Bandwidth Product (MHz) | Input Bias Current (nA) | Input Offset Voltage (mV) | Output Current / Channel (mA) | Supply Span Min (V) | Supply Span Max (V) | Operating Temperature (°C) | Slew Rate (V/µs) |
|---|---|---|---|---|---|---|---|---|---|---|
| LM224DG | onsemi | Obsolete | 1.0 | 90 | 2 | 40 | 3 | 32 | -25 ~ 85 | — |
| LM124DR | Texas Instruments | Active | 1.2 | 20 | 3 | 30 | 3 | 30 | -55 ~ 125 | 0.5 |
| LM224ADR | Texas Instruments | Active | 1.2 | 15 | 2 | 30 | 3 | 30 | -25 ~ 85 | 0.5 |
| LM224D | STMicroelectronics | Active | 1.2 | 20 | 2 | 40 | 3 | 30 | -40 ~ 105 | 0.4 |
| LM224DR | UMW | Active | 1.2 | 20 | 3 | 30 | 3 | 32 | -20 ~ 85 | 0.5 |
| LM224DRG3 | Texas Instruments | Last Time Buy | 1.2 | 20 | 3 | 30 | 3 | 30 | -25 ~ 85 | 0.5 |
| LM224KDR | Texas Instruments | Active | 1.2 | 20 | 3 | 30 | 3 | 30 | -25 ~ 85 | 0.5 |
| LM124D | STMicroelectronics | Obsolete | 1.2 | 20 | 2 | 30 | 3 | 30 | -55 ~ 125 | 0.4 |
| LM124DG4 | Texas Instruments | Last Time Buy | 1.2 | 20 | 3 | 30 | 3 | 30 | -55 ~ 125 | 0.5 |
| LM124DRG4 | Texas Instruments | Discontinued at DiGi Electronics | 1.2 | 20 | 3 | 30 | 3 | 30 | -55 ~ 125 | 0.5 |
Engineering Selection Recommendations
Direct Substitutes (Same Base Product Number - LM224):
The LM224ADR (Texas Instruments, Active status) provides the closest functional replacement for the LM224DG. This part maintains the same operating temperature range (-25°C to 85°C), identical input offset voltage (2 mV), and equivalent supply voltage specifications. The LM224ADR demonstrates improved input bias current performance (15 nA versus 90 nA) and is currently in active production with RoHS3 compliance.
The LM224D (STMicroelectronics, Active status) offers an alternative with matching output current capability (40 mA per channel) and input offset voltage (2 mV). This part extends the operating temperature range to -40°C to 105°C and maintains active product status.
The LM224DR (UMW, Active status) provides compatibility with the original supply voltage span (3 V to 32 V) and is available in active production status.
Upgraded Alternatives (LM124 Series):
The LM124DR (Texas Instruments, Active status) represents an upgraded option with extended operating temperature range (-55°C to 125°C), lower input bias current (20 nA), and higher gain bandwidth product (1.2 MHz). This part is suitable for applications requiring enhanced temperature performance.
The LM124DG4 (Texas Instruments, Last Time Buy status) and LM124DRG4 (Texas Instruments, Discontinued at DiGi Electronics) offer similar upgraded specifications but with limited availability status.
Compliance and Availability Considerations:
All substitute parts maintain REACH Unaffected status and EAR99 ECCN classification. Parts with Active product status (LM224ADR, LM224D, LM224DR, LM224KDR, LM124DR) are recommended for new designs and ongoing production requirements. Parts with Last Time Buy or Discontinued status should be evaluated for long-term supply chain planning.
Frequently Asked Questions (FAQ)
Q: Can the LM224ADR directly replace the LM224DG in existing designs?
A: The LM224ADR is functionally compatible with the LM224DG. Both parts share the same 14-SOIC package, 4-circuit configuration, operating temperature range (-25°C to 85°C), and input offset voltage specification (2 mV). The LM224ADR demonstrates superior input bias current performance (15 nA versus 90 nA) and is in active production. No circuit modifications are required for substitution.
Q: What is the difference between LM224 and LM124 series parts?
A: The LM124 series represents an upgraded product line with enhanced specifications. LM124 parts feature lower input bias current (20 nA), higher gain bandwidth product (1.2 MHz), and extended operating temperature range (-55°C to 125°C). The LM224 series operates within -25°C to 85°C. Both series maintain the same 4-circuit general-purpose amplifier configuration and 14-SOIC package. Selection between series depends on application temperature requirements.
Q: Are all substitute parts available in the same package?
A: All listed substitute parts are configured in the 14-SOIC (0.154", 3.90mm Width) surface mount package, maintaining PCB footprint compatibility with the LM224DG. Packaging formats vary (Cut Tape, Digi-Reel, Tube, Tape & Reel) but do not affect the component's physical dimensions or mounting characteristics.
Q: Which substitute part offers the best availability?
A: The LM224ADR (Texas Instruments) and LM224D (STMicroelectronics) are both in active production status with substantial inventory levels (133,500 and 4,495 units respectively). The LM224KDR (Texas Instruments, 1,410 units) is also actively produced. Parts designated as Last Time Buy or Discontinued should be evaluated for long-term supply requirements.
Q: Does the LM224DR from UMW provide full compatibility?
A: The LM224DR from UMW is functionally compatible with the LM224DG. It maintains the 4-circuit configuration, 14-SOIC package, and supply voltage range (3 V to 32 V). The part is in active production with RoHS3 compliance. Operating temperature range is -20°C to 85°C, which encompasses the LM224DG specification of -25°C to 85°C at the upper end but does not extend to -25°C at the lower end. Application-specific temperature requirements should be verified.
Q: What compliance certifications apply to substitute parts?
A: All substitute parts maintain REACH Unaffected status and EAR99 ECCN classification, consistent with the LM224DG. Parts in active production status (LM224ADR, LM224D, LM224DR, LM224KDR, LM124DR) carry RoHS3 compliance certification. Moisture sensitivity level is MSL 1 (Unlimited) across all parts, indicating no special moisture handling requirements.
Q: Can LM124 parts be used in applications designed for LM224?
A: LM124 parts are electrically compatible with LM224 applications. The LM124 series provides enhanced performance characteristics including lower input bias current and higher gain bandwidth product. The extended operating temperature range (-55°C to 125°C) of LM124 parts accommodates all LM224 application requirements. No circuit modifications are necessary for substitution, though the improved specifications may provide performance benefits.
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