LM224DRG4 Equivalent & Substitute Parts

Part Overview

The LM224DRG4 is a general-purpose operational amplifier integrated circuit containing four independent amplifier circuits in a 14-SOIC surface-mount package. Manufactured by Texas Instruments, this device is designed for applications requiring low-cost, general-purpose amplification with a gain-bandwidth product of 1.2 MHz and supply voltage range of 3V to 30V.

The LM224DRG4 is currently discontinued at DiGi Electronics, necessitating identification of functionally equivalent substitute components. Alternative parts must maintain compatibility with the original electrical specifications, mechanical packaging, and application requirements while considering current product availability and manufacturing status.

Key Parameters

Parameter	LM224DRG4 Specification
Amplifier Type	General Purpose
Number of Circuits	4
Gain Bandwidth Product	1.2 MHz
Slew Rate	0.5 V/µs
Current - Input Bias	20 nA
Voltage - Input Offset	3 mV
Current - Supply (x4 Channels)	1.4 mA
Current - Output / Channel	30 mA
Voltage - Supply Span (Min)	3 V
Voltage - Supply Span (Max)	30 V
Operating Temperature	-25°C to 85°C
Package / Case	14-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the LM224DRG4 is determined by the following critical parameters:

Electrical Compatibility Criteria:

Number of circuits: Must be 4 independent amplifier circuits
Gain-bandwidth product: 1.0 MHz to 1.3 MHz range
Input bias current: 20 nA to 90 nA
Supply voltage range: Minimum 3V, maximum 30V or higher
Output current per channel: Minimum 30 mA
Operating temperature: Must encompass -25°C to 85°C or broader range

Mechanical Compatibility Criteria:

Package type: 14-SOIC or equivalent 14-pin surface-mount package
Pin pitch and body width: 0.154" (3.90mm) or compatible dimensions
Mounting type: Surface mount

Regulatory Compliance:

RoHS3 compliance required
MSL rating: 1 (Unlimited) preferred

Substitute parts are grouped into two categories: direct pin-compatible replacements with identical or superior electrical performance, and functional equivalents with minor parameter variations that remain within application tolerance.

Parameter Comparison

Parameter	LM224DRG4	LM224DR (UMW)	LM2902DR (Rohm)	LM324AM/NOPB (TI)	LM324AMX/NOPB (TI)	LP324M/NOPB (TI)	LP324MX/NOPB (TI)	LM224DR2G (onsemi)	BA10324AF-E2 (Rohm)	BA2902F-E2 (Rohm)	LM124DT (STMicroelectronics)
Manufacturer	Texas Instruments	UMW	Rohm Semiconductor	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments	onsemi	Rohm Semiconductor	Rohm Semiconductor	STMicroelectronics
Number of Circuits	4	4	4	4	4	4	4	4	4	4	4
Gain Bandwidth Product	1.2 MHz	1.2 MHz	1.2 MHz	1 MHz	1 MHz	100 kHz	100 kHz	1 MHz	500 kHz	500 kHz	1.3 MHz
Slew Rate (V/µs)	0.5	0.5	0.3	—	—	0.05	0.05	—	0.2	0.2	0.4
Current - Input Bias (nA)	20	20	20	45	45	2	2	90	20	20	20
Voltage - Input Offset (mV)	3	3	1	2	2	2	2	2	2	2	2
Current - Supply (mA)	1.4	0.7	1	1.5	1.5	0.085	0.085	—	0.6	0.7	1.5
Current - Output / Channel (mA)	30	30	30	40	40	10	10	40	35	30	40
Voltage - Supply Span (Min)	3 V	3 V	3 V	3 V	3 V	3 V	3 V	3 V	3 V	3 V	3 V
Voltage - Supply Span (Max)	30 V	32 V	32 V	32 V	32 V	32 V	32 V	32 V	32 V	32 V	30 V
Operating Temperature	-25°C to 85°C	-20°C to 85°C	-40°C to 125°C	0°C to 70°C	0°C to 70°C	0°C to 70°C	0°C to 70°C	-25°C to 85°C	-40°C to 85°C	-40°C to 125°C	-55°C to 125°C
Package / Case	14-SOIC (0.154", 3.90mm)	14-SOIC (0.154", 3.90mm)	14-SOIC (0.154", 3.90mm)	14-SOIC (0.154", 3.90mm)	14-SOIC (0.154", 3.90mm)	14-SOIC (0.154", 3.90mm)	14-SOIC (0.154", 3.90mm)	14-SOIC (0.154", 3.90mm)	14-SOIC (0.173", 4.40mm)	14-SOIC (0.173", 4.40mm)	14-SOIC (0.154", 3.90mm)
Product Status	Discontinued	Active	Obsolete	Active	Active	Active	Active	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Tier 1: Direct Pin-Compatible Replacements (Preferred)

LM224DR2G (onsemi) and LM224DR (UMW) are the primary substitutes for LM224DRG4. Both maintain the LM224 base product number, ensuring identical pinout and package dimensions (14-SOIC, 0.154" width). LM224DR2G is currently active with 105,200 units in stock and covers the original operating temperature range of -25°C to 85°C. LM224DR (UMW) is also active with 105,100 units available. Both parts maintain the 1.2 MHz gain-bandwidth product and 20 nA input bias current specification. These parts are electrically and mechanically interchangeable with the original LM224DRG4.

Tier 2: Functionally Equivalent Replacements (Compatible with Minor Variations)

LM124DT (STMicroelectronics) provides superior performance with a 1.3 MHz gain-bandwidth product and extended operating temperature range (-55°C to 125°C). The 14-SOIC package dimensions are identical. This part is active with 10,200 units in stock and is suitable for applications requiring broader temperature operation.

LM324AMX/NOPB and LM324AM/NOPB (Texas Instruments) are active alternatives with 1 MHz gain-bandwidth product and 40 mA output current per channel. These parts operate within 0°C to 70°C temperature range, which is narrower than the original specification. They are suitable for applications not requiring the full -25°C to 85°C range. LM324AMX/NOPB has 36,756 units in stock; LM324AM/NOPB has 105,684 units available.

Tier 3: Low-Power Alternatives (Reduced Performance)

LP324MX/NOPB and LP324M/NOPB (Texas Instruments) feature significantly reduced power consumption (85 µA supply current versus 1.4 mA) and lower gain-bandwidth product (100 kHz). These parts are suitable only for applications where bandwidth requirements are relaxed and power consumption is critical. Output current is limited to 10 mA per channel.

Tier 4: Alternative Manufacturers (Functional Equivalents)

BA10324AF-E2 and BA2902F-E2 (Rohm Semiconductor) provide 500 kHz gain-bandwidth product with extended temperature ranges. BA2902F-E2 operates to 125°C. Package dimensions differ slightly (0.173" width versus 0.154"), requiring PCB layout verification. Both are active with adequate stock availability.

LM2902DR (Rohm Semiconductor) is obsolete and should be avoided for new designs despite superior input offset voltage (1 mV) and extended temperature range (-40°C to 125°C).

Selection Criteria Summary:

For direct replacement: Use LM224DR2G (onsemi) or LM224DR (UMW)
For extended temperature operation: Use LM124DT (STMicroelectronics)
For standard commercial temperature range: Use LM324AMX/NOPB (Texas Instruments)
For low-power applications: Use LP324MX/NOPB (Texas Instruments)
All selected parts maintain ROHS3 compliance and MSL 1 rating

Frequently Asked Questions (FAQ)

Q1: Can I directly replace LM224DRG4 with LM224DR2G without PCB modifications?

A: Yes. LM224DR2G maintains identical pinout, package type (14-SOIC), and package dimensions (0.154" width, 3.90mm). No PCB layout changes are required. Electrical specifications are compatible within application tolerance.

Q2: What is the key difference between LM224DR (UMW) and LM224DR2G (onsemi)?

A: Both are LM224 base product variants with identical electrical specifications and package dimensions. The primary difference is manufacturer and minimum operating temperature: LM224DR operates to -20°C minimum, while LM224DR2G operates to -25°C minimum, matching the original LM224DRG4 specification. For applications requiring -25°C operation, LM224DR2G is the preferred choice.

Q3: Why do LM324AMX/NOPB and LM324AM/NOPB have a narrower operating temperature range?

A: The LM324 series uses LinCMOS™ technology optimized for 0°C to 70°C commercial temperature operation. This is a design characteristic of the LM324 family. If your application requires -25°C to 85°C operation, use LM224DR2G or LM124DT instead.

Q4: Can I use LP324MX/NOPB as a direct replacement?

A: LP324MX/NOPB is not a direct replacement. While it maintains the same package and pinout, it has significantly reduced gain-bandwidth product (100 kHz versus 1.2 MHz) and lower output current (10 mA versus 30 mA per channel). Use LP324MX/NOPB only if your application has relaxed bandwidth requirements and power consumption is the primary design constraint.

Q5: Are BA10324AF-E2 and BA2902F-E2 pin-compatible with LM224DRG4?

A: Both Rohm parts are pin-compatible and functionally equivalent. However, package body width differs (0.173" versus 0.154"), which may affect PCB layout spacing. Verify PCB footprint compatibility before selection. Both parts are active and have adequate stock availability.

Q6: What does "Discontinued at DiGi Electronics" mean for LM224DRG4?

A: This indicates the part is no longer actively distributed through DiGi Electronics. However, alternative sources may have remaining inventory. The recommended approach is to transition to an active substitute part such as LM224DR2G or LM224DR to ensure long-term supply chain reliability.

Q7: Which substitute part has the best input offset voltage specification?

A: LM2902DR (Rohm) has the lowest input offset voltage at 1 mV. However, this part is obsolete and should not be used for new designs. Among active parts, LM324AMX/NOPB, LM324AM/NOPB, LP324M/NOPB, LP324MX/NOPB, BA10324AF-E2, and BA2902F-E2 all specify 2 mV input offset voltage.

Q8: Which substitute provides the widest operating temperature range?

A: LM124DT (STMicroelectronics) and BA2902F-E2 (Rohm) both operate from -40°C to 125°C, providing the broadest temperature coverage. LM124DT is preferred for applications requiring both wide temperature range and 1.3 MHz gain-bandwidth product performance.

Q9: Are all substitute parts RoHS3 compliant?

A: Yes. All active substitute parts listed maintain ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating, matching the original LM224DRG4 environmental specifications.

Q10: What is the inventory status of recommended substitutes?

A: LM224DR2G (onsemi) has 105,200 units in stock. LM224DR (UMW) has 105,100 units available. LM324AMX/NOPB has 36,756 units. LP324MX/NOPB has 23,900 units. All recommended Tier 1 and Tier 2 substitutes have substantial inventory availability for immediate procurement.

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