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MAX4471ESA-T Equivalent & Substitute Parts
Part Overview
The MAX4471ESA-T is a general-purpose operational amplifier manufactured by Analog Devices Inc./Maxim Integrated, configured as a dual-channel (2 circuit) rail-to-rail amplifier in 8-SOIC surface mount packaging. This device is classified as obsolete product status, which necessitates identification of active equivalent and substitute components for ongoing design support and procurement continuity.
The MAX4471ESA-T operates across a supply voltage range of 1.8V to 5.5V with an operating temperature range of -40°C to 85°C. Its primary application domain includes low-power, general-purpose amplification circuits where rail-to-rail output capability is required within constrained power budgets.
Substiute Parts
Key Parameters
| Parameter | Value | Unit |
|---|---|---|
| Amplifier Type | General Purpose | — |
| Number of Circuits | 2 | — |
| Output Type | Rail-to-Rail | — |
| Slew Rate | 0.002 | V/µs |
| Gain Bandwidth Product | 9 | kHz |
| Current - Input Bias | 200 | pA |
| Voltage - Input Offset | 500 | µV |
| Current - Supply (x2 Channels) | 750 | nA |
| Current - Output / Channel | 36 | mA |
| Voltage - Supply Span (Min) | 1.8 | V |
| Voltage - Supply Span (Max) | 5.5 | V |
| Operating Temperature | -40 to 85 | °C |
| Package / Case | 8-SOIC (0.154", 3.90mm Width) | — |
| Mounting Type | Surface Mount | — |
| RoHS Status | ROHS3 Compliant | — |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) | — |
Substitute Part Grouping Explanation
Substitution of the MAX4471ESA-T is determined by strict adherence to the following electrical and mechanical parameters:
Primary Substitution Criteria:
- Package type: 8-SOIC (0.154", 3.90mm Width)
- Mounting type: Surface Mount
- Number of circuits: 2
- Output type: Rail-to-Rail
- Supply voltage range: Minimum 1.8V to 5.5V maximum
- Operating temperature range: -40°C to 85°C minimum
- RoHS3 Compliance
Secondary Compatibility Parameters:
- Amplifier type classification (General Purpose or CMOS)
- Slew rate, gain bandwidth product, input bias current, input offset voltage, supply current, and output current per channel
Substitute parts are grouped into two categories: Direct Packaging Equivalents (identical packaging and product status transition) and Functional Equivalents (enhanced electrical performance with identical mechanical compatibility).
Parameter Comparison
| Parameter | MAX4471ESA-T | MAX4471ESA+T | AD8542ARZ | AD8542ARZ-REEL | AD8542ARZ-REEL7 | AD8602ARZ | AD8602ARZ-REEL | AD8602ARZ-REEL7 | AD8602DRZ | AD8602DRZ-REEL | AD8602DRZ-REEL7 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Amplifier Type | General Purpose | General Purpose | General Purpose | General Purpose | General Purpose | CMOS | CMOS | CMOS | CMOS | 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 | Rail-to-Rail | Rail-to-Rail |
| Slew Rate (V/µs) | 0.002 | 0.002 | 0.92 | 0.92 | 0.92 | 6 | 6 | 6 | 6 | 6 | 6 |
| Gain Bandwidth Product (kHz) | 9 | 9 | 1000 | 1000 | 1000 | 8400 | 8400 | 8400 | 8400 | 8400 | 8400 |
| Current - Input Bias (pA) | 200 | 200 | 4 | 4 | 4 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 |
| Voltage - Input Offset (µV) | 500 | 500 | 1000 | 1000 | 1000 | 80 | 80 | 80 | 1300 | 1300 | 1300 |
| Current - Supply x2 Channels (nA/µA) | 750 nA | 750 nA | 45 µA | 45 µA | 45 µA | 750 µA | 750 µA | 750 µA | 750 µA | 750 µA | 750 µA |
| Current - Output / Channel (mA) | 36 | 36 | 30 | 30 | 30 | 50 | 50 | 50 | 50 | 50 | 50 |
| Voltage - Supply Span Min (V) | 1.8 | 1.8 | 2.7 | 2.7 | 2.7 | 2.7 | 2.7 | 2.7 | 2.7 | 2.7 | 2.7 |
| Voltage - Supply Span Max (V) | 5.5 | 5.5 | 5.5 | 5.5 | 5.5 | 5.5 | 5.5 | 5.5 | 5.5 | 5.5 | 5.5 |
| Operating Temperature (°C) | -40 to 85 | -40 to 85 | -40 to 125 | -40 to 125 | -40 to 125 | -40 to 125 | -40 to 125 | -40 to 125 | -40 to 125 | -40 to 125 | -40 to 125 |
| Package / Case | 8-SOIC | 8-SOIC | 8-SOIC | 8-SOIC | 8-SOIC | 8-SOIC | 8-SOIC | 8-SOIC | 8-SOIC | 8-SOIC | 8-SOIC |
| Product Status | Obsolete | Active | Active | 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 |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) |
Engineering Selection Recommendations
Category 1: Direct Packaging Equivalent (Identical Electrical Performance)
MAX4471ESA+T represents the direct equivalent of MAX4471ESA-T with transition from obsolete to active product status. This part maintains identical electrical specifications and 8-SOIC packaging. The primary distinction is packaging format (Tape & Reel vs. standard tube), making MAX4471ESA+T the preferred selection for procurement continuity when electrical performance requirements remain unchanged.
Category 2: General-Purpose Amplifier Substitutes with Enhanced Performance
The AD8542ARZ, AD8542ARZ-REEL, and AD8542ARZ-REEL7 series provide functional substitution with improved electrical characteristics. These parts maintain the 8-SOIC package, dual-channel configuration, and rail-to-rail output capability. Key enhancements include increased slew rate (0.92V/µs vs. 0.002V/µs), higher gain bandwidth product (1 MHz vs. 9 kHz), and reduced input bias current (4 pA vs. 200 pA). All AD8542 variants are active products with extended operating temperature range (-40°C to 125°C). Minimum supply voltage increases to 2.7V, which may require circuit redesign in applications requiring 1.8V operation.
Category 3: CMOS Amplifier Substitutes with Maximum Performance Enhancement
The AD8602 series (AD8602ARZ, AD8602ARZ-REEL, AD8602ARZ-REEL7, AD8602DRZ, AD8602DRZ-REEL, AD8602DRZ-REEL7) offers the highest performance substitution option. These CMOS amplifiers deliver significantly enhanced slew rate (6V/µs), gain bandwidth product (8.4 MHz), and input bias current (0.2 pA). All variants maintain 8-SOIC packaging, dual-channel configuration, and rail-to-rail output. Operating temperature range extends to 125°C. Supply voltage minimum remains 2.7V. The AD8602ARZ and AD8602ARZ-REEL variants feature 80µV input offset voltage, while AD8602DRZ variants specify 1.3mV input offset voltage.
Compliance and Certification Status:
All substitute parts maintain ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating, ensuring compatibility with current manufacturing and environmental standards. All parts are manufactured by Analog Devices Inc., ensuring consistent quality and long-term availability.
Frequently Asked Questions (FAQ)
Q1: Can MAX4471ESA+T be used as a direct replacement for MAX4471ESA-T?
A: Yes. MAX4471ESA+T is the active product equivalent with identical electrical specifications and 8-SOIC packaging. The primary difference is packaging format (Tape & Reel). Both parts are ROHS3 compliant with MSL 1 rating.
Q2: What are the key limitations when substituting with AD8542ARZ series?
A: The AD8542ARZ series requires minimum supply voltage of 2.7V, compared to 1.8V for MAX4471ESA-T. Circuits designed for 1.8V operation require redesign. All other electrical parameters are compatible or improved. Operating temperature range extends to 125°C.
Q3: When should AD8602 CMOS amplifiers be selected over AD8542 general-purpose amplifiers?
A: AD8602 series selection is appropriate when applications require higher slew rate (6V/µs vs. 0.92V/µs), higher gain bandwidth product (8.4 MHz vs. 1 MHz), or lower input bias current (0.2 pA vs. 4 pA). Supply current consumption increases from 45µA to 750µA per dual-channel device.
Q4: Are packaging format variations (Tube, Cut Tape & Digi-Reel, Tape & Reel) electrically equivalent?
A: Yes. Packaging format variations (indicated by suffixes such as -REEL, -REEL7) represent identical electrical devices in different distribution formats. Selection depends on procurement and assembly process requirements, not electrical performance.
Q5: What is the significance of the -REEL7 suffix in AD8602 and AD8542 part numbers?
A: The -REEL7 suffix indicates Cut Tape & Digi-Reel packaging format. This is electrically identical to standard -REEL (Tape & Reel) and tube variants. Selection is based on assembly equipment compatibility and procurement logistics.
Q6: Can AD8602DRZ be substituted for AD8602ARZ?
A: Both are CMOS amplifiers in 8-SOIC packaging with identical electrical performance except for input offset voltage specification (1.3mV for AD8602DRZ vs. 80µV for AD8602ARZ). Selection depends on input offset voltage tolerance requirements of the application.
Q7: What is the minimum supply voltage requirement for all substitute parts?
A: MAX4471ESA-T and MAX4471ESA+T support 1.8V minimum. All AD8542 and AD8602 variants require 2.7V minimum supply voltage. Circuits operating below 2.7V cannot use AD8542 or AD8602 substitutes.
Q8: Are all substitute parts suitable for -40°C to 85°C temperature range applications?
A: Yes. All substitute parts support extended operating temperature range of -40°C to 125°C, which encompasses the original -40°C to 85°C specification. No temperature-related limitations exist for substitution.
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