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MAX474CSA Equivalent & Substitute Parts
Part Overview
The MAX474CSA is a general-purpose operational amplifier manufactured by Analog Devices Inc./Maxim Integrated, configured as a dual-circuit (2-channel) rail-to-rail amplifier in an 8-SOIC surface mount package. This device is classified as obsolete, indicating that direct procurement from original manufacturing sources is no longer available. The part operates across a supply voltage range of 2.7V to 5.25V with an operating temperature range of 0°C to 70°C. Due to its obsolete status, identification of functionally equivalent active alternatives is necessary for design continuity, system maintenance, and new production implementations.
Substiute Parts
Key Parameters
| Parameter | Value | Unit |
|---|---|---|
| Amplifier Type | General Purpose | — |
| Number of Circuits | 2 | — |
| Output Type | Rail-to-Rail | — |
| Slew Rate | 17 | V/µs |
| Gain Bandwidth Product | 12 | MHz |
| Current - Input Bias | 80 | nA |
| Voltage - Input Offset | 700 | µV |
| Current - Supply | 2 | mA (x2 Channels) |
| Voltage - Supply Span (Min) | 2.7 | V |
| Voltage - Supply Span (Max) | 5.25 | V |
| Operating Temperature | 0 to 70 | °C |
| Package / Case | 8-SOIC (0.154", 3.90mm Width) | — |
| Mounting Type | Surface Mount | — |
| RoHS Status | RoHS non-compliant | — |
Substitute Part Grouping Explanation
Substitution of the MAX474CSA requires matching of critical electrical and mechanical parameters that define functional compatibility. The primary substitution criteria are:
Mandatory Matching Parameters:
- Number of Circuits: 2 (dual-channel configuration)
- Output Type: Rail-to-Rail
- Package / Case: 8-SOIC (0.154", 3.90mm Width)
- Mounting Type: Surface Mount
- Amplifier Type: General Purpose
Electrical Performance Parameters (Allowable Ranges):
- Voltage - Supply Span: Minimum 2.7V or lower; Maximum 5.25V or higher
- Slew Rate: 17 V/µs or greater
- Gain Bandwidth Product: 12 MHz or greater
- Current - Input Bias: 80 nA or lower
- Voltage - Input Offset: 700 µV or lower
Substitute parts are grouped into two categories based on their electrical characteristics and product status:
Category 1: Active General-Purpose Amplifiers (Primary Substitutes) Parts AD8692ARZ, AD8692ARZ-REEL, AD8692ARZ-REEL7, LMV722ID, LMV722IDR, and LMV722M meet or exceed all mandatory electrical parameters and maintain the 8-SOIC package specification. These parts are in active production status.
Category 2: Alternative Amplifier Types (Secondary Substitutes) Parts BU7442F-E2 and BU7442SF-E2 are CMOS amplifiers with different electrical characteristics (lower slew rate and gain bandwidth product) and represent functional alternatives only for applications with relaxed performance requirements.
Parts LME49721MA/NOPB and LME49721MAX/NOPB are audio-grade amplifiers with enhanced specifications and represent performance upgrades rather than direct substitutes.
Parameter Comparison
| Parameter | MAX474CSA | AD8692ARZ | AD8692ARZ-REEL | AD8692ARZ-REEL7 | LMV722ID | LMV722IDR | LMV722M | LME49721MA/NOPB | LME49721MAX/NOPB | BU7442F-E2 | BU7442SF-E2 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Amplifier Type | General Purpose | General Purpose | General Purpose | General Purpose | General Purpose | General Purpose | General Purpose | Audio | Audio | CMOS | CMOS |
| Number of Circuits | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 |
| Output Type | Rail-to-Rail | Rail-to-Rail | Rail-to-Rail | Rail-to-Rail | Rail-to-Rail | Rail-to-Rail | Rail-to-Rail | Rail-to-Rail | Rail-to-Rail | — | — |
| Slew Rate (V/µs) | 17 | 5 | 5 | 5 | 5.25 | 5.25 | 5.25 | 8.5 | 8.5 | 0.3 | 0.3 |
| Gain Bandwidth Product (MHz) | 12 | 10 | 10 | 10 | 10 | 10 | 10 | 20 | 20 | 0.6 | 0.6 |
| Current - Input Bias (pA/nA) | 80 nA | 1 pA | 1 pA | 1 pA | 260 nA | 260 nA | 260 nA | 0.04 pA | 0.04 pA | 1 pA | 1 pA |
| Voltage - Input Offset (µV) | 700 | 400 | 400 | 400 | 80 | 80 | 80 | 300 | 300 | 1000 | 1000 |
| Current - Supply (mA) | 2 (x2) | 0.95 (x2) | 0.95 (x2) | 0.95 (x2) | 1.81 (x2) | 1.81 (x2) | 2.01 (x2) | 2.15 (x2) | 2.15 (x2) | 0.1 | 0.1 |
| Voltage - Supply Span Min (V) | 2.7 | 2.7 | 2.7 | 2.7 | 2.2 | 2.2 | 2.2 | 2.2 | 2.2 | 1.7 | 1.7 |
| Voltage - Supply Span Max (V) | 5.25 | 6 | 6 | 6 | 5.5 | 5.5 | 5.5 | 5.5 | 5.5 | 5.5 | 5.5 |
| Operating Temperature (°C) | 0 to 70 | -40 to 125 | -40 to 125 | -40 to 125 | -40 to 105 | -40 to 105 | -40 to 85 | -40 to 85 | -40 to 85 | -40 to 85 | -40 to 105 |
| Package / Case | 8-SOIC (0.154", 3.90mm) | 8-SOIC (0.154", 3.90mm) | 8-SOIC (0.154", 3.90mm) | 8-SOIC (0.154", 3.90mm) | 8-SOIC (0.154", 3.90mm) | 8-SOIC (0.154", 3.90mm) | 8-SOIC (0.154", 3.90mm) | 8-SOIC (0.154", 3.90mm) | 8-SOIC (0.154", 3.90mm) | 8-SOIC (0.173", 4.40mm) | 8-SOIC (0.173", 4.40mm) |
| RoHS Status | RoHS non-compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | RoHS non-compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant |
| Product Status | Obsolete | Active | Active | Active | Active | Active | Active | Active | Active | Active | Active |
Engineering Selection Recommendations
Primary Substitutes (Recommended for Direct Replacement):
The AD8692ARZ series (AD8692ARZ, AD8692ARZ-REEL, AD8692ARZ-REEL7) from Analog Devices Inc. represents the most suitable direct substitutes for the MAX474CSA. These parts maintain identical package geometry (8-SOIC, 0.154", 3.90mm width), dual-circuit configuration, and rail-to-rail output specification. All three variants are in active production status with ROHS3 compliance. The AD8692ARZ-REEL7 variant offers the highest inventory availability (17,600 pcs) and is supplied in Cut Tape & Digi-Reel® packaging. Electrical performance meets or exceeds the MAX474CSA specification across all critical parameters: supply voltage range (2.7V to 6V), input bias current (1 pA versus 80 nA), and input offset voltage (400 µV versus 700 µV). Operating temperature range extends to -40°C to 125°C, providing broader environmental coverage than the original part.
Secondary Substitutes (Performance-Equivalent Alternatives):
The LMV722 series from Texas Instruments (LMV722ID, LMV722IDR, LMV722M) provides general-purpose amplification with identical package and circuit configuration. These parts are in active production with ROHS3 compliance (except LMV722M). The LMV722IDR variant offers the highest inventory (25,300 pcs) in Cut Tape & Digi-Reel® packaging. Electrical specifications are comparable to the MAX474CSA with lower input offset voltage (80 µV) and similar slew rate (5.25 V/µs). Operating temperature range reaches -40°C to 105°C. The LMV722M variant includes automotive-grade qualification (AEC-Q100) for applications requiring automotive reliability standards.
Audio-Grade Alternatives (Performance Enhancement):
The LME49721 series from Texas Instruments (LME49721MA/NOPB, LME49721MAX/NOPB) represents audio-optimized amplifiers with enhanced specifications. These parts maintain the 8-SOIC package and dual-circuit configuration with ROHS3 compliance and active production status. Electrical performance exceeds the MAX474CSA: slew rate of 8.5 V/µs, gain bandwidth product of 20 MHz, and input offset voltage of 300 µV. The LME49721MAX/NOPB variant offers significantly higher inventory (92,900 pcs) in Cut Tape & Digi-Reel® packaging. These parts are suitable for applications requiring superior audio fidelity and dynamic performance.
Alternative Amplifier Types (Limited Compatibility):
The BU7442 series from Rohm Semiconductor (BU7442F-E2, BU7442SF-E2) are CMOS amplifiers with different electrical characteristics. These parts maintain the dual-circuit configuration and surface mount technology but feature different package dimensions (8-SOIC, 0.173", 4.40mm width). Electrical performance is significantly reduced compared to the MAX474CSA: slew rate of 0.3 V/µs and gain bandwidth product of 600 kHz. These parts are suitable only for low-frequency applications with relaxed performance requirements and are not recommended for direct replacement of the MAX474CSA in existing designs.
Compliance and Regulatory Considerations:
All recommended substitute parts (AD8692ARZ series, LMV722 series, LME49721 series) are ROHS3 compliant, addressing environmental regulatory requirements that the obsolete MAX474CSA does not meet. The AD8692ARZ series and LME49721 series provide the broadest operating temperature ranges (-40°C to 125°C and -40°C to 85°C respectively), supporting extended environmental specifications. All parts maintain REACH Unaffected status and EAR99 export classification consistent with the original part.
Frequently Asked Questions (FAQ)
Q1: Can the AD8692ARZ directly replace the MAX474CSA without PCB modifications?
A: Yes. The AD8692ARZ maintains identical 8-SOIC package geometry (0.154", 3.90mm width), pinout compatibility as a dual-circuit rail-to-rail amplifier, and surface mount configuration. No PCB layout changes are required. However, electrical performance differences (lower slew rate: 5 V/µs versus 17 V/µs) may affect high-frequency circuit behavior. Circuit simulation or bench testing is recommended for applications sensitive to slew rate performance.
Q2: What is the primary difference between AD8692ARZ, AD8692ARZ-REEL, and AD8692ARZ-REEL7?
A: These three variants are electrically identical. The differences are packaging and supply format: AD8692ARZ is supplied in Tube packaging; AD8692ARZ-REEL is supplied in Cut Tape & Digi-Reel® format; AD8692ARZ-REEL7 is also supplied in Cut Tape & Digi-Reel® format. Selection depends on manufacturing process requirements (tube for manual assembly, reel for automated pick-and-place equipment). AD8692ARZ-REEL7 offers the highest inventory availability.
Q3: Why does the LMV722 series show lower input offset voltage (80 µV) than the MAX474CSA (700 µV)?
A: Lower input offset voltage indicates improved DC accuracy and reduced output drift over temperature. This is a performance enhancement, not a compatibility issue. The LMV722 series is suitable for applications requiring tighter DC specifications. For applications where the MAX474CSA's 700 µV offset was acceptable, the LMV722 series will perform identically or better.
Q4: Is the LME49721 series suitable for general-purpose applications, or only audio applications?
A: The LME49721 series is optimized for audio applications with enhanced slew rate (8.5 V/µs) and gain bandwidth product (20 MHz), but is fully functional for general-purpose amplification. The audio optimization provides superior dynamic performance for any application requiring fast signal transients. It is a performance upgrade suitable for any application where the MAX474CSA was used.
Q5: Can the BU7442 series replace the MAX474CSA in existing designs?
A: The BU7442 series is not recommended as a direct replacement. While it maintains the dual-circuit configuration and surface mount technology, it features different package dimensions (0.173", 4.40mm width versus 0.154", 3.90mm width) and significantly reduced electrical performance (slew rate 0.3 V/µs versus 17 V/µs; gain bandwidth product 600 kHz versus 12 MHz). The BU7442 series is suitable only for low-frequency applications with relaxed performance requirements and would require PCB redesign.
Q6: What is the significance of ROHS3 compliance for substitute parts?
A: ROHS3 compliance indicates that the substitute parts meet current environmental regulations restricting hazardous substances (lead, cadmium, mercury, etc.). The obsolete MAX474CSA is RoHS non-compliant. Selecting ROHS3-compliant substitutes ensures compliance with modern manufacturing and environmental standards, particularly for products destined for European markets or regulated industries.
Q7: How does the extended operating temperature range (-40°C to 125°C) of the AD8692ARZ affect system design compared to the MAX474CSA (0°C to 70°C)?
A: The extended temperature range provides greater environmental flexibility and reliability margin. The AD8692ARZ maintains specifications across a broader temperature window, reducing the risk of performance degradation in extreme conditions. For applications operating within the MAX474CSA's original range (0°C to 70°C), the AD8692ARZ provides identical performance with additional margin. For applications requiring extended temperature operation, the AD8692ARZ enables system qualification without additional thermal management.
Q8: Are there any pinout differences between the MAX474CSA and recommended substitutes?
A: All recommended substitutes (AD8692ARZ series, LMV722 series, LME49721 series) maintain identical 8-SOIC pinout configuration as dual-circuit rail-to-rail amplifiers. Direct socket replacement is possible without pin reassignment. The BU7442 series also maintains 8-SOIC pinout but with different package dimensions, requiring PCB modification.
Q9: Which substitute part offers the best inventory availability?
A: The LME49721MAX/NOPB offers the highest inventory availability (92,900 pcs) in Cut Tape & Digi-Reel® packaging. The AD8692ARZ-REEL7 provides the second-highest availability (17,600 pcs). For immediate procurement needs, these variants are recommended. The LMV722IDR offers 25,300 pcs availability as an alternative.
Q10: What electrical parameter is most critical when selecting a substitute for the MAX474CSA?
A: The slew rate (17 V/µs) is the most performance-critical parameter. The MAX474CSA's slew rate significantly exceeds all recommended substitutes (AD8692ARZ: 5 V/µs; LMV722: 5.25 V/µs; LME49721: 8.5 V/µs). Applications sensitive to high-frequency transient response or fast signal edges may experience performance changes. The LME49721 series provides the closest slew rate performance (8.5 V/µs) among general-purpose substitutes. Circuit simulation or bench testing is recommended for bandwidth-critical applications.
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