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MAX492ESA Equivalent & Substitute Parts
Part Overview
The MAX492ESA is a general-purpose operational amplifier featuring dual circuits in an 8-SOIC surface-mount package, manufactured by Analog Devices Inc./Maxim Integrated. This device provides rail-to-rail output capability with a supply voltage range of 2.7 V to 6 V and operates across the industrial temperature range of -40°C to 85°C. The MAX492ESA is classified as obsolete; however, 1215 units remain in stock as new original inventory. Due to its obsolete status, identifying functionally equivalent substitute components is essential for design continuity and long-term supply chain management.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer Part Number | MAX492ESA |
| Manufacturer | Analog Devices Inc./Maxim Integrated |
| Category | Linear, Amplifiers |
| Amplifier Type | General Purpose |
| Number of Circuits | 2 |
| Output Type | Rail-to-Rail |
| Package / Case | 8-SOIC (0.154", 3.90mm Width) |
| Mounting Type | Surface Mount |
| Slew Rate | 0.2 V/µs |
| Gain Bandwidth Product | 500 kHz |
| Current - Input Bias | 25 nA |
| Voltage - Input Offset | 200 µV |
| Current - Supply | 150 µA (x2 Channels) |
| Current - Output / Channel | 30 mA |
| Voltage - Supply Span (Min) | 2.7 V |
| Voltage - Supply Span (Max) | 6 V |
| Operating Temperature | -40°C ~ 85°C |
| Product Status | Obsolete |
| RoHS Status | RoHS non-compliant |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
Substitute Part Grouping Explanation
Substitute parts for the MAX492ESA are identified based on strict electrical and mechanical compatibility criteria. The primary substitution parameters are:
Critical Matching Parameters:
- Number of circuits: 2 (dual amplifier configuration)
- Output type: Rail-to-Rail
- Package / Case: 8-SOIC (0.154", 3.90mm Width)
- Mounting type: Surface Mount
- Supply voltage range: Minimum 2.7 V, Maximum 6 V (or compatible subset)
Functional Performance Parameters:
- Slew rate: 0.2 V/µs or greater
- Gain bandwidth product: 500 kHz or greater
- Current - output / channel: 30 mA or greater
Substitute parts are grouped into two categories:
Category 1: Direct Manufacturer Variants Parts with identical electrical specifications and the same base product number (MAX492) but different packaging or product status.
Category 2: Cross-Manufacturer Equivalents Parts from Texas Instruments (OPA and TLV series) that meet or exceed the electrical performance requirements while maintaining package and pinout compatibility.
Parameter Comparison
| Part Number | Manufacturer | Amplifier Type | Slew Rate (V/µs) | GBW (kHz) | Input Bias (nA/pA) | Input Offset (µV) | Supply Current (µA) | Output Current (mA) | Supply Min (V) | Supply Max (V) | Temp Range (°C) | Product Status | RoHS Status |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| MAX492ESA | Analog Devices | General Purpose | 0.2 | 500 | 25 nA | 200 | 150 | 30 | 2.7 | 6 | -40 ~ 85 | Obsolete | Non-compliant |
| MAX492ESA+ | Analog Devices | General Purpose | 0.2 | 500 | 25 nA | 200 | 150 | 30 | 2.7 | 6 | -40 ~ 85 | Active | ROHS3 Compliant |
| OPA2313ID | Texas Instruments | General Purpose | 0.5 | 1000 | 0.2 pA | 500 | 50 | 15 | 1.8 | 5.5 | -40 ~ 125 | Active | ROHS3 Compliant |
| OPA2313IDR | Texas Instruments | General Purpose | 0.5 | 1000 | 0.2 pA | 500 | 50 | 15 | 1.8 | 5.5 | -40 ~ 125 | Active | ROHS3 Compliant |
| OPA2314AID | Texas Instruments | CMOS | 1.5 | 3000 | 0.2 pA | 500 | 150 | 20 | 1.8 | 5.5 | -40 ~ 125 | Active | ROHS3 Compliant |
| OPA2314AIDR | Texas Instruments | CMOS | 1.5 | 3000 | 0.2 pA | 500 | 150 | 20 | 1.8 | 5.5 | -40 ~ 125 | Active | ROHS3 Compliant |
| OPA2317ID | Texas Instruments | Zero-Drift | 0.15 | 300 | 275 pA | 20 | 21 | 5 | 1.8 | 5.5 | -40 ~ 150 | Active | ROHS3 Compliant |
| OPA2317IDR | Texas Instruments | Zero-Drift | 0.15 | 300 | 275 pA | 20 | 21 | 5 | 1.8 | 5.5 | -40 ~ 150 | Active | ROHS3 Compliant |
| OPA2344UA | Texas Instruments | CMOS | 0.8 | 1000 | 0.2 pA | 200 | 150 | 15 | 2.5 | 5.5 | -40 ~ 85 | Active | ROHS3 Compliant |
| OPA2344UA/2K5 | Texas Instruments | CMOS | 0.8 | 1000 | 0.2 pA | 200 | 150 | 15 | 2.5 | 5.5 | -40 ~ 85 | Active | ROHS3 Compliant |
| TLV2452AID | Texas Instruments | General Purpose | 0.11 | 220 | 500 pA | 300 | 23 | 10 | 2.7 | 6 | -40 ~ 125 | Active | ROHS3 Compliant |
Engineering Selection Recommendations
Primary Recommendation: MAX492ESA+
The MAX492ESA+ is the direct successor to the MAX492ESA. It maintains identical electrical specifications and package configuration while offering active product status and ROHS3 compliance. This part is the preferred choice for direct replacement in existing designs. The MAX492ESA+ is available in tube packaging with 12,600 units in stock.
Secondary Recommendation: OPA2344UA or OPA2344UA/2K5
The OPA2344UA series from Texas Instruments provides a functionally compatible alternative with enhanced performance characteristics. These CMOS amplifiers deliver improved slew rate (0.8 V/µs versus 0.2 V/µs) and higher gain bandwidth product (1 MHz versus 500 kHz) while maintaining the same supply current specification (150 µA per channel) and operating temperature range (-40°C to 85°C). The supply voltage range is slightly narrower (2.5 V to 5.5 V minimum versus 2.7 V to 6 V), which may require verification in applications operating at the lower voltage extreme. Both tube and tape & reel packaging options are available with substantial inventory.
Alternative Recommendation: OPA2313ID or OPA2313IDR
The OPA2313 series offers superior performance with doubled slew rate (0.5 V/µs) and doubled gain bandwidth product (1 MHz). These parts feature significantly lower input bias current (0.2 pA) and reduced supply current (50 µA per channel). The extended operating temperature range (-40°C to 125°C) provides additional margin for industrial applications. However, output current per channel is reduced to 15 mA, which may limit applications requiring higher load drive capability. Both tube and tape & reel packaging are available.
Specialized Application: OPA2317ID or OPA2317IDR
The OPA2317 zero-drift amplifier series is suitable for precision measurement applications requiring minimal input offset voltage (20 µV typical). This part sacrifices bandwidth (300 kHz) and slew rate (0.15 V/µs) in exchange for superior DC accuracy and ultra-low supply current (21 µA per channel). Output current is limited to 5 mA per channel. Selection of this part requires confirmation that the application's bandwidth and slew rate requirements are compatible with the reduced performance specifications.
Not Recommended: OPA2314AID or OPA2314AIDR; TLV2452AID
The OPA2314 series exhibits reduced output current per channel (20 mA versus 30 mA), which may be insufficient for applications designed around the MAX492ESA's 30 mA specification. The TLV2452AID features slew rate (0.11 V/µs) and gain bandwidth product (220 kHz) below the MAX492ESA specification, along with significantly reduced output current (10 mA per channel) and higher input offset voltage (300 µV). These parts are suitable only for applications with relaxed performance requirements.
Compliance Considerations
All recommended substitute parts carry ROHS3 compliance certification, addressing regulatory requirements that the original MAX492ESA does not meet. The MAX492ESA+ provides the most direct path to compliance while maintaining identical electrical performance.
Frequently Asked Questions (FAQ)
Q1: Can the MAX492ESA+ be used as a direct drop-in replacement for the MAX492ESA?
A: Yes. The MAX492ESA+ is electrically and mechanically identical to the MAX492ESA. Both parts feature the same 8-SOIC package, pinout, electrical specifications, and performance characteristics. The primary differences are product status (active versus obsolete) and RoHS compliance (ROHS3 compliant versus non-compliant). No circuit modifications are required.
Q2: What is the key difference between the MAX492ESA+ and the OPA2344UA?
A: The MAX492ESA+ maintains the original MAX492ESA specifications exactly. The OPA2344UA offers enhanced performance with 4× higher slew rate (0.8 V/µs versus 0.2 V/µs) and 2× higher gain bandwidth product (1 MHz versus 500 kHz). Both parts operate at identical supply current (150 µA per channel) and share the same temperature range (-40°C to 85°C). The OPA2344UA supply voltage range is slightly narrower (2.5 V to 5.5 V versus 2.7 V to 6 V). Selection depends on whether the application requires the enhanced bandwidth and slew rate performance.
Q3: Why is the OPA2313 series not recommended as a primary substitute despite superior performance?
A: While the OPA2313 series offers improved slew rate and gain bandwidth product, it reduces output current per channel from 30 mA to 15 mA. Applications designed around the MAX492ESA's 30 mA output current specification may experience insufficient drive capability with the OPA2313. Additionally, the supply voltage range is narrower (1.8 V to 5.5 V versus 2.7 V to 6 V). Substitution requires verification that the application's output current and supply voltage requirements are compatible.
Q4: Are all substitute parts available in the same 8-SOIC package?
A: Yes. All substitute parts listed are available in the 8-SOIC (0.154", 3.90mm Width) surface-mount package with identical pinout. Packaging format (tube, tape & reel, or cut tape) varies by part number and supplier, but the physical package dimensions and pin configuration remain consistent across all alternatives.
Q5: What packaging options are available for the recommended substitutes?
A: The MAX492ESA+ is available in tube packaging. The OPA2344UA is available in both tube and tape & reel (TR) packaging. The OPA2313 series is available in tube (OPA2313ID) and tape & reel (OPA2313IDR) formats. The OPA2317 series is available in tube (OPA2317ID) and cut tape & Digi-Reel (OPA2317IDR) formats. Selection of packaging format depends on assembly process requirements and order quantity.
Q6: Can the TLV2452AID be used as a substitute for the MAX492ESA?
A: The TLV2452AID is not recommended as a primary substitute. While it maintains the same supply voltage range (2.7 V to 6 V) and package format, it falls below the MAX492ESA specification in critical performance parameters: slew rate is 0.11 V/µs (versus 0.2 V/µs), gain bandwidth product is 220 kHz (versus 500 kHz), and output current per channel is 10 mA (versus 30 mA). Substitution is only appropriate for applications with relaxed performance requirements that can tolerate reduced bandwidth and output drive capability.
Q7: What is the significance of the OPA2317's zero-drift architecture?
A: The OPA2317 employs zero-drift amplifier technology to achieve exceptionally low input offset voltage (20 µV typical versus 200 µV for the MAX492ESA). This architecture is beneficial for precision measurement and signal conditioning applications where DC accuracy is critical. However, zero-drift amplifiers typically exhibit reduced bandwidth (300 kHz versus 500 kHz) and slew rate (0.15 V/µs versus 0.2 V/µs). Selection requires confirmation that the application's bandwidth and slew rate requirements are compatible with the reduced performance specifications.
Q8: How do CMOS amplifiers (OPA2314, OPA2344) differ from general-purpose amplifiers (MAX492, OPA2313)?
A: CMOS amplifiers feature extremely low input bias current (0.2 pA) compared to general-purpose amplifiers (25 nA for MAX492ESA, 0.2 pA for OPA2313). This characteristic is advantageous in high-impedance input applications where input bias current can introduce measurement error. The OPA2314 and OPA2344 offer higher slew rates and gain bandwidth products than the MAX492ESA. However, the OPA2314 reduces output current per channel to 20 mA. The OPA2344 maintains 150 µA supply current and offers performance characteristics suitable for general-purpose applications requiring enhanced bandwidth.
Q9: What inventory levels are available for each substitute part?
A: MAX492ESA+ has 12,600 units in stock. OPA2313ID has 10,463 units. OPA2313IDR has 1,532 units. OPA2314AID has 2,400 units. OPA2314AIDR has 21,966 units. OPA2317ID has 7,073 units. OPA2317IDR has 2,900 units. OPA2344UA has 3,016 units. OPA2344UA/2K5 has 3,922 units. TLV2452AID has 5,000,300 units. Inventory levels should be verified with the supplier for current availability and lead time confirmation.
Q10: Are there any temperature range considerations when selecting a substitute?
A: The MAX492ESA operates from -40°C to 85°C. Most substitute parts extend the upper temperature limit to 125°C (OPA2313, OPA2314, OPA2317) or maintain the same range (OPA2344UA at -40°C to 85°C). The OPA2317 extends to 150°C. Extended temperature range provides additional margin for industrial applications but does not restrict substitution in designs operating within the original -40°C to 85°C specification. Verify that the application's actual operating temperature range is compatible with the selected substitute part.
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