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OPA337UAG4 Equivalent & Substitute Parts
Part Overview
The OPA337UAG4 is a general-purpose operational amplifier manufactured by Texas Instruments, featuring rail-to-rail output capability in an 8-SOIC surface mount package. This device is classified as a MicroAmplifier™ series component and is currently discontinued at DiGi Electronics, though 869 pieces remain in new original stock inventory.
The OPA337UAG4 operates across a 2.7V to 5.5V supply voltage range with a 1.2V/µs slew rate and 3MHz gain bandwidth product. Its low input bias current of 0.2pA and 500µV input offset voltage make it suitable for precision analog signal conditioning applications. Due to its discontinued status, identifying equivalent and substitute parts is essential for design continuity and long-term component sourcing.
Substiute Parts
Key Parameters
| Parameter | OPA337UAG4 Value | Unit |
|---|---|---|
| Amplifier Type | General Purpose | — |
| Number of Circuits | 1 | — |
| Output Type | Rail-to-Rail | — |
| Package / Case | 8-SOIC (0.154", 3.90mm Width) | — |
| Mounting Type | Surface Mount | — |
| Slew Rate | 1.2 | V/µs |
| Gain Bandwidth Product | 3 | MHz |
| Current - Input Bias | 0.2 | pA |
| Voltage - Input Offset | 500 | µV |
| Current - Supply | 525 | µA |
| Current - Output / Channel | 9 | mA |
| Voltage - Supply Span (Min) | 2.7 | V |
| Voltage - Supply Span (Max) | 5.5 | V |
| Operating Temperature | -40 to 85 | °C |
| RoHS Status | ROHS3 Compliant | — |
| Moisture Sensitivity Level | 2 (1 Year) | — |
Substitute Part Grouping Explanation
Substitution of the OPA337UAG4 is determined by strict adherence to the following critical parameters:
Mandatory Compatibility Parameters:
- Package / Case: 8-SOIC (0.154", 3.90mm Width) — all substitutes must use identical surface mount package
- Mounting Type: Surface Mount — no through-hole alternatives
- Output Type: Rail-to-Rail — required for voltage swing capability
- Number of Circuits: 1 — single amplifier configuration
- Voltage Supply Range: Minimum 2.7V and maximum 5.5V overlap required
Performance Parameters for Functional Equivalence:
- Slew Rate: 1.2V/µs (baseline)
- Gain Bandwidth Product: 3MHz (baseline)
- Current - Input Bias: 0.2pA (baseline)
- Voltage - Input Offset: 500µV (baseline)
- Current - Supply: 525µA (baseline)
- Current - Output / Channel: 9mA (baseline)
Substitute parts are grouped into two categories:
Category A - Direct Equivalents: Parts with identical or superior electrical performance across all key parameters while maintaining full backward compatibility.
Category B - Functional Alternatives: Parts with comparable performance characteristics that operate within the same supply voltage range and package footprint but with variations in secondary parameters such as slew rate, bandwidth, or offset voltage.
Parameter Comparison
| Part Number | Manufacturer | Product Status | Slew Rate (V/µs) | GBW (MHz) | Input Bias (pA) | Input Offset (µV) | Supply Current (µA) | Output Current (mA) | Supply Min (V) | Supply Max (V) | Temp Range (°C) |
|---|---|---|---|---|---|---|---|---|---|---|---|
| OPA337UAG4 | Texas Instruments | Discontinued | 1.2 | 3 | 0.2 | 500 | 525 | 9 | 2.7 | 5.5 | -40 to 85 |
| OPA337UA | Burr Brown | Active | 1.2 | 3 | 0.2 | 500 | 525 | 9 | 2.7 | 5.5 | -40 to 85 |
| LMP7717MAE/NOPB | Texas Instruments | Active | 35 | 88 | 0.1 | 10 | 1150 | 60 | 1.8 | 5.5 | -40 to 125 |
| MCP601-E/SN | Microchip Technology | Active | 2.3 | 2.8 | 1 | 700 | 230 | 22 | 2.7 | 6 | -40 to 125 |
| MCP601-I/SN | Microchip Technology | Active | 2.3 | 2.8 | 1 | 700 | 230 | 22 | 2.7 | 6 | -40 to 85 |
| MCP601T-E/SN | Microchip Technology | Active | 2.3 | 2.8 | 1 | 700 | 230 | 22 | 2.7 | 6 | -40 to 125 |
| MCP6271-E/SN | Microchip Technology | Active | 0.9 | 2 | 1 | 3000 | 170 | 25 | 2 | 6 | -40 to 125 |
| MCP6271T-E/SN | Microchip Technology | Active | 0.9 | 2 | 1 | 3000 | 170 | 25 | 2 | 6 | -40 to 125 |
| MCP6273-E/SN | Microchip Technology | Active | 0.9 | 2 | 1 | 3000 | 170 | 25 | 2 | 6 | -40 to 125 |
| MCP6281-E/SN | Microchip Technology | Active | 2.5 | 5 | 1 | 3000 | 450 | 25 | 2.2 | 6 | -40 to 125 |
| MCP6L1T-E/SN | Microchip Technology | Active | 2.3 | 2.8 | 1 | 1000 | 200 | — | 2.7 | 6 | -40 to 125 |
| MCP6L71T-E/SN | Microchip Technology | Active | 2.3 | 2.8 | 1 | 1000 | 200 | — | 2.7 | 6 | -40 to 125 |
Engineering Selection Recommendations
OPA337UA (Burr Brown) — Primary Direct Equivalent
The OPA337UA is the manufacturer-recommended equivalent and represents the closest functional match to the OPA337UAG4. This part maintains identical electrical specifications across all measured parameters: 1.2V/µs slew rate, 3MHz gain bandwidth product, 0.2pA input bias current, and 500µV input offset voltage. The OPA337UA is currently in active production status with 100,188 pieces available in inventory, providing superior long-term supply security compared to the discontinued OPA337UAG4. Both parts share the MicroAmplifier™ series designation and identical 8-SOIC packaging. The OPA337UA is ROHS3 compliant and suitable for direct pin-for-pin replacement in existing designs.
MCP601T-E/SN (Microchip Technology) — Active Production Alternative
The MCP601T-E/SN is an active production alternative offering comparable performance with extended temperature range coverage (-40°C to 125°C versus -40°C to 85°C). This part maintains the same 8-SOIC package and rail-to-rail output configuration. The MCP601T-E/SN exhibits a slightly higher slew rate of 2.3V/µs and marginally lower gain bandwidth product of 2.8MHz, representing negligible performance deviation for most general-purpose applications. Supply current is reduced to 230µA, providing improved power efficiency. The part is available in tape and reel packaging with 7,800 pieces in stock inventory. ROHS3 compliance and unlimited moisture sensitivity rating ensure compatibility with modern manufacturing processes.
MCP6281-E/SN (Microchip Technology) — Enhanced Performance Alternative
The MCP6281-E/SN provides superior performance characteristics with 2.5V/µs slew rate and 5MHz gain bandwidth product, representing a 67% increase in bandwidth capability. This part is suitable for applications requiring faster signal response while maintaining the same 8-SOIC package footprint. The MCP6281-E/SN operates across a 2.2V to 6V supply range, extending the lower voltage boundary by 0.5V. Current consumption is elevated to 450µA, reflecting the enhanced performance tier. This part is actively produced with 2,220 pieces available in inventory and supports extended temperature operation to 125°C.
LMP7717MAE/NOPB (Texas Instruments) — High-Performance Alternative
The LMP7717MAE/NOPB represents a high-performance alternative from the same manufacturer as the original OPA337UAG4. This part delivers significantly enhanced specifications: 35V/µs slew rate, 88MHz gain bandwidth product, and 10µV input offset voltage. The LMP7717MAE/NOPB is designed for precision applications requiring superior dynamic response and lower offset drift. Supply voltage range extends to 1.8V minimum, enabling operation in low-voltage systems. This part is actively produced with 1,771 pieces in inventory and supports extended temperature range to 125°C. Selection of this part is appropriate only when application requirements justify the increased power consumption (1.15mA) and cost premium.
MCP6L1T-E/SN (Microchip Technology) — Low-Power Alternative
The MCP6L1T-E/SN offers reduced power consumption at 200µA supply current while maintaining comparable slew rate (2.3V/µs) and gain bandwidth product (2.8MHz) to the MCP601 series. Input offset voltage is improved to 1mV. This part is suitable for battery-powered or energy-constrained applications. The MCP6L1T-E/SN is actively produced with 6,448 pieces in inventory and supports extended temperature operation to 125°C.
Frequently Asked Questions (FAQ)
Q: Can the OPA337UA be used as a direct replacement for the OPA337UAG4?
A: Yes. The OPA337UA is the manufacturer-recommended equivalent with identical electrical specifications and package configuration. Pin-for-pin replacement is supported without circuit modification.
Q: What is the primary reason for finding substitutes for the OPA337UAG4?
A: The OPA337UAG4 is discontinued at DiGi Electronics. While 869 pieces remain in inventory, long-term design continuity requires identification of active production alternatives to ensure future component availability.
Q: Are all substitute parts compatible with the same PCB footprint?
A: Yes. All listed substitute parts use the 8-SOIC (0.154", 3.90mm Width) surface mount package, ensuring mechanical compatibility with existing PCB designs. No layout modifications are required.
Q: Which substitute part offers the closest electrical performance match?
A: The OPA337UA provides identical electrical specifications across all measured parameters. The MCP601T-E/SN and MCP6L1T-E/SN offer comparable performance with minor variations in slew rate and supply current.
Q: Can I use the MCP6271 series as a substitute?
A: The MCP6271-E/SN and MCP6271T-E/SN are functionally compatible but exhibit reduced slew rate (0.9V/µs) and gain bandwidth product (2MHz). These parts are suitable for applications where lower bandwidth is acceptable. Input offset voltage is significantly higher at 3mV.
Q: What is the difference between MCP601-E/SN and MCP601T-E/SN?
A: Both parts share identical electrical specifications and 8-SOIC packaging. The primary difference is packaging format: MCP601-E/SN is supplied in tube packaging, while MCP601T-E/SN is supplied in tape and reel format. The MCP601T-E/SN supports extended temperature range to 125°C.
Q: Does the LMP7717MAE/NOPB require circuit design changes?
A: The LMP7717MAE/NOPB is pin-compatible and requires no circuit modifications for basic replacement. However, its significantly enhanced performance characteristics (35V/µs slew rate, 88MHz bandwidth) may require compensation network adjustments in applications with tight feedback control loops.
Q: Are all substitute parts RoHS3 compliant?
A: Yes. All listed substitute parts are ROHS3 compliant and suitable for use in applications requiring environmental compliance certification.
Q: What is the moisture sensitivity rating difference between the OPA337UAG4 and substitute parts?
A: The OPA337UAG4 has MSL 2 (1 Year) rating. Most substitute parts have MSL 1 (Unlimited) rating, providing superior moisture tolerance and extended shelf life without baking requirements.
Q: Which substitute part offers the lowest power consumption?
A: The MCP6271 series (MCP6271-E/SN and MCP6271T-E/SN) offers the lowest supply current at 170µA. The MCP6L1T-E/SN provides 200µA supply current with improved offset voltage characteristics.
Q: Can I mix different substitute parts in the same design?
A: Yes, provided all parts operate within the same supply voltage range (2.7V to 5.5V minimum overlap) and the application does not require matched offset voltage or slew rate characteristics across multiple amplifier stages.
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