Request Quote
(Ships tomorrow)
KA324AD Equivalent & Substitute Parts
Part Overview
The KA324AD 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 that direct procurement of new units may be limited. The KA324AD operates across a supply voltage range of 3 V to 32 V with an operating temperature range of 0°C to 70°C, making it suitable for standard industrial and commercial applications requiring general-purpose amplification.
Due to its obsolete status, identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain reliability, and support ongoing production requirements. Active alternatives with compatible electrical and mechanical specifications are available from the same manufacturer.
Substiute Parts
Key Parameters
| Parameter | KA324AD Value | Unit |
|---|---|---|
| Amplifier Type | General Purpose | — |
| Number of Circuits | 4 | — |
| Current - Input Bias | 40 | nA |
| Voltage - Input Offset | 1.5 | mV |
| Current - Supply | 1 | mA |
| Current - Output / Channel | 40 | mA |
| Voltage - Supply Span (Min) | 3 | V |
| Voltage - Supply Span (Max) | 32 | V |
| Operating Temperature | 0 to 70 | °C |
| Mounting Type | Surface Mount | — |
| Package / Case | 14-SOIC (0.154", 3.90mm Width) | — |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) | — |
| Product Status | Obsolete | — |
Substitute Part Grouping Explanation
Substitution of the KA324AD is determined by strict compatibility across the following critical parameters:
Primary Compatibility Criteria:
- Package type: 14-SOIC surface mount configuration
- Number of circuits: 4-circuit operational amplifier
- Supply voltage range: Minimum 3 V, maximum 32 V
- Output current per channel: 40 mA
- Mounting type: Surface mount
Secondary Compatibility Considerations:
- Input bias current: 40 nA (KA324AD specification)
- Input offset voltage: 1.5 mV (KA324AD specification)
- Supply current: 1 mA (KA324AD specification)
- Operating temperature range: 0°C to 70°C (KA324AD specification)
Substitute parts are grouped into two categories based on electrical performance:
Category 1: Direct Electrical Equivalents — Parts maintaining identical input bias current (40 nA), input offset voltage specifications, and supply current characteristics within the KA324AD operating temperature range (0°C to 70°C).
Category 2: Functional Equivalents — Parts with compatible 4-circuit general-purpose amplifier architecture, identical package configuration, and overlapping supply voltage and output current specifications, but with extended operating temperature ranges or enhanced electrical performance characteristics.
Parameter Comparison
| Part Number | Manufacturer | Product Status | Input Bias Current (nA) | Input Offset Voltage (mV) | Output Current / Channel (mA) | Supply Voltage Min (V) | Supply Voltage Max (V) | Operating Temperature (°C) | Package | RoHS Status |
|---|---|---|---|---|---|---|---|---|---|---|
| KA324AD | onsemi | Obsolete | 40 | 1.5 | 40 | 3 | 32 | 0 to 70 | 14-SOIC | — |
| LM324ADR2G | onsemi | Active | 40 | 2 | 40 | 3 | 32 | 0 to 70 | 14-SOIC | ROHS3 Compliant |
| LM324DR2G | onsemi | Active | 90 | 2 | 40 | 3 | 32 | 0 to 70 | 14-SOIC | ROHS3 Compliant |
| LM224DR2G | onsemi | Active | 90 | 2 | 40 | 3 | 32 | -25 to 85 | 14-SOIC | ROHS3 Compliant |
| LM2902DR2G | onsemi | Active | 90 | 2 | 40 | 3 | 32 | -40 to 105 | 14-SOIC | ROHS3 Compliant |
| LM2902VDR2G | onsemi | Active | 90 | 2 | 40 | 3 | 32 | -40 to 125 | 14-SOIC | ROHS3 Compliant |
| MC34074ADR2G | onsemi | Active | 100 | 0.5 | 30 | 3 | 44 | 0 to 70 | 14-SOIC | ROHS3 Compliant |
| MC34074DR2G | onsemi | Active | 100 | 1 | 30 | 3 | 44 | 0 to 70 | 14-SOIC | ROHS3 Compliant |
| MC34074VDR2G | onsemi | Active | 100 | 1 | 30 | 3 | 44 | -40 to 125 | 14-SOIC | ROHS3 Compliant |
| MC33074ADR2G | onsemi | Active | 100 | 0.5 | 30 | 3 | 44 | -40 to 85 | 14-SOIC | ROHS3 Compliant |
| MC33074DR2G | onsemi | Active | 100 | 1 | 30 | 3 | 44 | -40 to 85 | 14-SOIC | ROHS3 Compliant |
Engineering Selection Recommendations
Primary Substitute: LM324ADR2G
The LM324ADR2G is the closest functional equivalent to the KA324AD. Both parts share identical input bias current specifications (40 nA), matching supply voltage range (3 V to 32 V), output current per channel (40 mA), and operating temperature range (0°C to 70°C). The LM324ADR2G is manufactured by onsemi with active product status and ROHS3 compliance, ensuring long-term availability and regulatory alignment. The input offset voltage specification differs marginally (2 mV versus 1.5 mV), which remains within acceptable tolerance for general-purpose amplifier applications.
Secondary Substitutes: LM324DR2G, LM224DR2G, LM2902DR2G, LM2902VDR2G
These parts maintain the 4-circuit general-purpose amplifier architecture, 14-SOIC package configuration, and compatible supply voltage range. All are active products with ROHS3 compliance. The LM324DR2G and LM224DR2G extend the operating temperature range beyond the KA324AD specification. The LM2902DR2G and LM2902VDR2G provide the widest operating temperature coverage (-40°C to 105°C and -40°C to 125°C respectively), suitable for applications requiring enhanced thermal performance.
Enhanced Performance Alternatives: MC34074ADR2G, MC34074DR2G, MC34074VDR2G, MC33074ADR2G, MC33074DR2G
The MC34074 and MC33074 series offer improved electrical characteristics including lower input offset voltage (0.5 mV to 1 mV), higher slew rate (13 V/µs), and extended supply voltage range (up to 44 V). These parts are suitable for applications requiring superior precision and wider operating margins. Output current per channel is reduced to 30 mA, which may require circuit redesign in applications demanding the full 40 mA output capability of the KA324AD.
All substitute parts are manufactured by onsemi, maintain surface mount 14-SOIC packaging, and carry ROHS3 compliance certification. Selection should be based on specific application requirements regarding input bias current, input offset voltage, output current capability, and operating temperature range.
Frequently Asked Questions (FAQ)
Q: Can the LM324ADR2G directly replace the KA324AD without circuit modification?
A: The LM324ADR2G is electrically compatible with the KA324AD across all critical parameters: input bias current (40 nA), supply voltage range (3 V to 32 V), output current per channel (40 mA), and operating temperature range (0°C to 70°C). The 14-SOIC package configuration is identical. Direct substitution is supported without circuit modification for applications operating within these specified ranges.
Q: What is the difference between LM324DR2G and LM324ADR2G?
A: Both parts are 4-circuit general-purpose amplifiers in 14-SOIC packages with identical supply voltage range and output current specifications. The primary difference is input bias current: LM324ADR2G specifies 40 nA (matching KA324AD), while LM324DR2G specifies 90 nA. For applications sensitive to input bias current, the LM324ADR2G is the preferred choice.
Q: Why do the MC34074 and MC33074 series show reduced output current per channel (30 mA versus 40 mA)?
A: The MC34074 and MC33074 series are enhanced general-purpose amplifiers with improved precision characteristics (lower input offset voltage and higher slew rate). The reduced output current specification reflects the different internal design architecture. Applications requiring the full 40 mA output capability should select LM324 or LM2902 series alternatives.
Q: Are all substitute parts ROHS3 compliant?
A: All active substitute parts listed (LM324ADR2G, LM324DR2G, LM224DR2G, LM2902DR2G, LM2902VDR2G, MC34074 series, and MC33074 series) carry ROHS3 compliance certification. The KA324AD, being obsolete, does not have documented RoHS status.
Q: Which substitute part offers the widest operating temperature range?
A: The LM2902VDR2G and MC34074VDR2G both support operating temperatures from -40°C to 125°C, providing the widest thermal coverage among available substitutes. These parts are suitable for applications requiring extended temperature performance beyond the KA324AD specification (0°C to 70°C).
Q: What packaging options are available for substitute parts?
A: Substitute parts are available in two packaging formats: Cut Tape (CT) & Digi-Reel® and Tape & Reel (TR). All parts maintain the 14-SOIC surface mount package configuration. Packaging selection depends on procurement volume and assembly process requirements.
Q: Can the LM2902 series be used in place of the KA324AD?
A: The LM2902 series (LM2902DR2G and LM2902VDR2G) is functionally compatible with the KA324AD. Both maintain 4-circuit general-purpose amplifier architecture, 14-SOIC packaging, and compatible supply voltage range (3 V to 32 V). The LM2902 series specifies 90 nA input bias current versus 40 nA for the KA324AD, and extends the operating temperature range to -40°C to 105°C or -40°C to 125°C. Substitution is supported for applications where the higher input bias current is acceptable.
Q: What is the significance of the "V" designation in part numbers like LM2902VDR2G?
A: The "V" designation indicates Tape & Reel (TR) packaging format, typically used for higher-volume automated assembly processes. Parts without the "V" designation (such as LM2902DR2G) are supplied in Cut Tape (CT) & Digi-Reel® format. Both formats contain identical die and electrical specifications; the difference is in packaging and delivery method.
Alternative Parts
SJ6012L2TP
Littelfuse Inc.
6 Alternative Parts
JMK107BBJ476MA-RE
Taiyo Yuden
10 Alternative Parts
GMK107BBJ475MA-T
Taiyo Yuden
5 Alternative Parts
SJ6020N2ARP
Littelfuse Inc.
3 Alternative Parts
SJ6025R2ATP
Littelfuse Inc.
4 Alternative Parts
2474-05L
API Delevan Inc.
1 Alternative Parts
4590R-684K
API Delevan Inc.
1 Alternative Parts
CM6560R-334
API Delevan Inc.
1 Alternative Parts
CM6460-104
API Delevan Inc.
1 Alternative Parts
5526-12
API Delevan Inc.
1 Alternative Parts