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MAX474ESA Equivalent & Substitute Parts
Part Overview
The MAX474ESA is a general-purpose operational amplifier manufactured by Analog Devices Inc./Maxim Integrated, configured as a dual-channel (2 circuit) rail-to-rail output device in 8-SOIC surface mount packaging. This part is classified as obsolete, indicating discontinued production and limited availability for new designs. The MAX474ESA operates across a supply voltage range of 2.7 V to 5.25 V with an operating temperature range of -40°C to 85°C, making it suitable for low-power analog signal conditioning applications.
Due to its obsolete status, identifying functionally equivalent substitute parts is essential for design continuity, procurement reliability, and long-term product support. Active alternative components with comparable electrical characteristics and identical packaging are available from multiple manufacturers.
Substiute Parts
Key Parameters
| Parameter | MAX474ESA | 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 | -40 to 85 | °C |
| Package / Case | 8-SOIC (0.154", 3.90mm Width) | — |
| Mounting Type | Surface Mount | — |
| Product Status | Obsolete | — |
| RoHS Status | RoHS non-compliant | — |
Substitute Part Grouping Explanation
Substitution of the MAX474ESA is determined by the following critical parameters:
Mandatory Compatibility Criteria:
- Number of Circuits: 2 (dual-channel configuration)
- Package / Case: 8-SOIC form factor with 0.154" (3.90mm) width
- Mounting Type: Surface Mount
- Output Type: Rail-to-Rail capability
- Voltage - Supply Span: Minimum 2.7 V, Maximum ≥ 5.25 V
- Operating Temperature: Support for -40°C to 85°C range
Performance Parameters (Functional Equivalence):
- Slew Rate: ≥ 17 V/µs (or lower if application permits)
- Gain Bandwidth Product: ≥ 12 MHz (or lower if application permits)
- Current - Input Bias: ≤ 80 nA (or lower for improved performance)
- Voltage - Input Offset: ≤ 700 µV (or lower for improved accuracy)
- Current - Supply: ≤ 2 mA per channel (or lower for power efficiency)
Substitute parts are grouped into two categories based on electrical performance and product status:
Category A - Direct Performance Equivalents (Active Status): Parts meeting or exceeding all mandatory compatibility criteria with active product status and modern compliance certifications (RoHS3, REACH Unaffected).
Category B - Functional Alternatives (Different Amplifier Type): Parts with compatible packaging and supply voltage but different amplifier topology (CMOS vs. bipolar), suitable for applications where the specific amplifier type is not critical.
Parameter Comparison
| Parameter | MAX474ESA | AD8692ARZ | LME49721MAX/NOPB | LMV722IDR | BU7442F-E2 | Unit |
|---|---|---|---|---|---|---|
| Amplifier Type | General Purpose | General Purpose | Audio | General Purpose | CMOS | — |
| Number of Circuits | 2 | 2 | 2 | 2 | 2 | — |
| Output Type | Rail-to-Rail | Rail-to-Rail | Rail-to-Rail | Rail-to-Rail | — | — |
| Slew Rate | 17 | 5 | 8.5 | 5.25 | 0.3 | V/µs |
| Gain Bandwidth Product | 12 | 10 | 20 | 10 | 0.6 | MHz |
| Current - Input Bias | 80 | 1 | 0.04 | 260 | 1 | pA |
| Voltage - Input Offset | 700 | 400 | 300 | 80 | 1000 | µV |
| Current - Supply | 2 | 0.95 | 2.15 | 1.81 | 0.1 | mA (x2 Ch) |
| Voltage - Supply Span (Min) | 2.7 | 2.7 | 2.2 | 2.2 | 1.7 | V |
| Voltage - Supply Span (Max) | 5.25 | 6 | 5.5 | 5.5 | 5.5 | V |
| Operating Temperature | -40 to 85 | -40 to 125 | -40 to 85 | -40 to 105 | -40 to 85 | °C |
| Package / Case | 8-SOIC (3.90mm) | 8-SOIC (3.90mm) | 8-SOIC (3.90mm) | 8-SOIC (3.90mm) | 8-SOIC (4.40mm) | — |
| Product Status | Obsolete | Active | Active | Active | Active | — |
| RoHS Status | Non-compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | — |
Engineering Selection Recommendations
Primary Substitute - AD8692ARZ Series (Analog Devices Inc.)
The AD8692ARZ, AD8692ARZ-REEL, and AD8692ARZ-REEL7 variants are the recommended primary substitutes for the MAX474ESA. These parts are manufactured by Analog Devices Inc., the same company that acquired Maxim Integrated, ensuring design continuity and technical support consistency. All three variants share identical electrical specifications and differ only in packaging format (Tube, Cut Tape & Digi-Reel®, or Cut Tape & Digi-Reel® with 7-inch reel).
Compliance and Status: AD8692ARZ series parts are active products with ROHS3 compliance and REACH Unaffected status, meeting modern regulatory requirements. The extended operating temperature range (-40°C to 125°C) provides additional margin beyond the MAX474ESA specification.
Electrical Compatibility: The AD8692ARZ maintains identical package geometry (8-SOIC, 3.90mm width), supply voltage range (2.7 V to 6 V), and rail-to-rail output capability. Input bias current is significantly lower (1 pA vs. 80 nA), and input offset voltage is reduced (400 µV vs. 700 µV), representing performance improvements. Slew rate (5 V/µs) and gain bandwidth product (10 MHz) are lower than the MAX474ESA but remain suitable for general-purpose applications not requiring the higher slew rate specification.
Secondary Substitute - LME49721MAX/NOPB (Texas Instruments)
The LME49721MAX/NOPB is an audio-grade operational amplifier from Texas Instruments, available in active product status with ROHS3 compliance. This part is optimized for audio signal processing with a higher gain bandwidth product (20 MHz) and improved slew rate (8.5 V/µs) compared to the MAX474ESA.
Electrical Compatibility: The LME49721MAX/NOPB maintains 8-SOIC packaging (3.90mm width), dual-channel configuration, and rail-to-rail output. Supply voltage range (2.2 V to 5.5 V) encompasses the MAX474ESA specification. Input bias current (0.04 pA) and input offset voltage (300 µV) represent significant performance improvements.
Application Suitability: This substitute is recommended for applications requiring superior audio performance, lower noise characteristics, or higher bandwidth. The extended gain bandwidth product (20 MHz) supports faster signal processing compared to the MAX474ESA (12 MHz).
Tertiary Substitute - LMV722IDR (Texas Instruments)
The LMV722IDR is a general-purpose operational amplifier from Texas Instruments in active product status with ROHS3 compliance. This part is available in Cut Tape & Digi-Reel® packaging with extended operating temperature range (-40°C to 105°C).
Electrical Compatibility: The LMV722IDR maintains 8-SOIC packaging (3.90mm width), dual-channel configuration, and rail-to-rail output. Supply voltage range (2.2 V to 5.5 V) encompasses the MAX474ESA specification. Input offset voltage (80 µV) is significantly lower, providing improved accuracy. Input bias current (260 nA) is higher than the MAX474ESA but remains acceptable for general-purpose applications.
Application Suitability: This substitute is recommended for applications requiring improved input offset voltage accuracy and extended operating temperature range. The slew rate (5.25 V/µs) and gain bandwidth product (10 MHz) are comparable to the AD8692ARZ.
Alternative Substitute - BU7442F-E2 / BU7442SF-E2 (Rohm Semiconductor)
The BU7442F-E2 and BU7442SF-E2 are CMOS operational amplifiers from Rohm Semiconductor in active product status with ROHS3 compliance. These parts represent a different amplifier topology (CMOS vs. bipolar) and are suitable only for applications where amplifier type is not critical.
Electrical Compatibility: Package geometry differs slightly (8-SOIC, 4.40mm width vs. 3.90mm width for MAX474ESA), which may affect PCB layout compatibility. Supply voltage range (1.7 V to 5.5 V) encompasses the MAX474ESA specification. Input bias current (1 pA) is significantly lower. However, slew rate (0.3 V/µs) and gain bandwidth product (0.6 MHz) are substantially lower, limiting applicability to low-frequency signal processing.
Application Suitability: This substitute is recommended only for low-frequency applications (< 1 MHz) where the reduced slew rate and bandwidth are acceptable. The CMOS topology provides ultra-low input bias current and reduced power consumption (100 µA total supply current).
Frequently Asked Questions (FAQ)
Q1: Can I directly replace MAX474ESA with AD8692ARZ without circuit modifications?
A: Yes, direct replacement is possible for most applications. Both parts share identical 8-SOIC packaging (3.90mm width), dual-channel configuration, rail-to-rail output, and compatible supply voltage ranges (2.7 V to 5.25 V for MAX474ESA; 2.7 V to 6 V for AD8692ARZ). Pin-to-pin compatibility is maintained. However, verify that your application does not require the higher slew rate (17 V/µs) of the MAX474ESA, as the AD8692ARZ provides 5 V/µs. For applications sensitive to slew rate, the LME49721MAX/NOPB (8.5 V/µs) may be more appropriate.
Q2: What is the difference between AD8692ARZ, AD8692ARZ-REEL, and AD8692ARZ-REEL7?
A: These three part numbers represent the same electrical device with different packaging and delivery formats. AD8692ARZ is supplied in Tube packaging. AD8692ARZ-REEL and AD8692ARZ-REEL7 are supplied in Cut Tape & Digi-Reel® format, with the REEL7 variant using a 7-inch reel. Electrical specifications, performance characteristics, and pin configuration are identical across all three variants. Selection depends on your procurement and assembly process requirements.
Q3: Is the MAX474ESA RoHS compliant, and do substitute parts meet modern compliance requirements?
A: The MAX474ESA is RoHS non-compliant and has obsolete product status. All recommended substitute parts (AD8692ARZ series, LME49721MAX/NOPB, LMV722IDR, BU7442F-E2, BU7442SF-E2) are ROHS3 compliant and have active product status. If your application or customer requirements mandate RoHS compliance, substitution is necessary. All substitute parts also maintain REACH Unaffected status.
Q4: Can I use BU7442F-E2 as a substitute for MAX474ESA?
A: BU7442F-E2 is a functional alternative only for low-frequency applications. While it maintains dual-channel configuration, 8-SOIC packaging, and compatible supply voltage range, the CMOS topology and significantly lower performance specifications (0.3 V/µs slew rate, 0.6 MHz bandwidth) limit its applicability. The package width also differs (4.40mm vs. 3.90mm), which may affect PCB layout compatibility. Use this substitute only if your application operates below 1 MHz and does not require the performance characteristics of the MAX474ESA.
Q5: What are the key performance differences between LME49721MAX/NOPB and AD8692ARZ?
A: Both parts are active, RoHS3-compliant substitutes with identical 8-SOIC packaging and dual-channel configuration. LME49721MAX/NOPB is optimized for audio applications with higher gain bandwidth product (20 MHz vs. 10 MHz) and higher slew rate (8.5 V/µs vs. 5 V/µs). AD8692ARZ provides lower input bias current (1 pA vs. 0.04 pA for LME49721MAX/NOPB) and lower supply current (0.95 mA vs. 2.15 mA per channel). Select LME49721MAX/NOPB for audio or high-bandwidth applications; select AD8692ARZ for low-power or general-purpose applications.
Q6: Does the extended operating temperature range of AD8692ARZ (-40°C to 125°C) affect compatibility with MAX474ESA designs?
A: No, the extended temperature range of AD8692ARZ (-40°C to 125°C) is a superset of the MAX474ESA specification (-40°C to 85°C) and provides additional design margin. If your application operates within the MAX474ESA temperature range (-40°C to 85°C), the AD8692ARZ will function identically. The extended range allows for future applications or environmental conditions beyond the original MAX474ESA specification without requiring component redesign.
Q7: Are there any pin configuration differences between MAX474ESA and substitute parts?
A: All recommended substitute parts (AD8692ARZ series, LME49721MAX/NOPB, LMV722IDR) maintain identical 8-SOIC pin configuration and are pin-for-pin compatible with the MAX474ESA. BU7442F-E2 and BU7442SF-E2 also maintain 8-pin SOIC configuration but with slightly different package width (4.40mm vs. 3.90mm). Verify PCB footprint compatibility before assembly, particularly for the Rohm parts.
Q8: Which substitute part offers the best power efficiency for battery-powered applications?
A: The AD8692ARZ provides the lowest supply current (0.95 mA per dual-channel configuration) among the recommended substitutes, making it the optimal choice for battery-powered or power-constrained applications. The BU7442F-E2 offers even lower supply current (100 µA total), but its significantly reduced bandwidth (0.6 MHz) limits applicability to low-frequency circuits only.
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