OPA365AIDRG4 Equivalent & Substitute Parts

Part Overview

The OPA365AIDRG4 is a general-purpose operational amplifier manufactured by Texas Instruments, housed in an 8-SOIC surface-mount package. This device features rail-to-rail output capability and is designed for applications requiring single-circuit amplification with moderate bandwidth and slew rate performance. The OPA365AIDRG4 is currently discontinued at DiGi Electronics, necessitating identification of functionally equivalent alternatives that maintain compatibility with existing circuit designs while meeting the same electrical and mechanical specifications.

Substiute Parts

OPA365AIDRG4

Texas InstrumentsIn Stock: 1210OPA365AIDRG4 Datasheet

Current PartRFQ

OPA365AIDR

Texas InstrumentsIn Stock: 17483OPA365AIDR Datasheet

MFR RecommendedRFQ

MCP6281-E/SN

Microchip TechnologyIn Stock: 2293MCP6281-E/SN Datasheet

MFR RecommendedRFQ

MCP6281T-E/SN

Microchip TechnologyIn Stock: 4002MCP6281T-E/SN Datasheet

MFR RecommendedRFQ

MCP6291-E/SN

Microchip TechnologyIn Stock: 3120MCP6291-E/SN Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the OPA365AIDRG4 is determined by strict adherence to the following criteria:

Primary Compatibility Requirements:

• Package type: 8-SOIC surface-mount only
• Amplifier configuration: Single-circuit general-purpose operational amplifier
• Output architecture: Rail-to-rail output capability
• Operating temperature range: -40°C to 125°C minimum
• Supply voltage compatibility: Minimum 2.2 V to maximum 5.5 V overlap required

Secondary Electrical Parameters: Substitute parts must maintain functional equivalence within the following ranges:

• Slew rate: 25 V/µs or greater
• Gain bandwidth product: 50 MHz or greater
• Input bias current: 0.2 pA or lower
• Input offset voltage: 100 µV or lower
• Output current capability: 65 mA or greater
• Supply current: 4.6 mA or lower

The OPA365AIDR qualifies as a direct manufacturer-recommended substitute with identical electrical specifications and active product status. The Microchip Technology MCP6281 and MCP6291 series devices are functionally equivalent alternatives that meet the core package and configuration requirements, though with different electrical performance characteristics within acceptable operational parameters.

Parameter Comparison

Engineering Selection Recommendations

OPA365AIDR (Texas Instruments)

The OPA365AIDR is the manufacturer-recommended direct substitute for the discontinued OPA365AIDRG4. This device maintains identical electrical specifications across all measured parameters, including slew rate, gain bandwidth product, input bias current, input offset voltage, supply current, and output current capability. The OPA365AIDR is currently in active production status with 17,400 units in stock. Both devices share identical package specifications, thermal operating range, and compliance certifications (ROHS3, REACH Unaffected). The primary distinction is packaging format: OPA365AIDR is supplied in Cut Tape and Digi-Reel formats, whereas the original OPA365AIDRG4 was supplied in Digi-Reel format. This substitute requires no circuit redesign and provides direct pin-for-pin compatibility.

MCP6281-E/SN and MCP6281T-E/SN (Microchip Technology)

The MCP6281 series devices are functionally equivalent alternatives manufactured by Microchip Technology. Both variants (tube packaging for MCP6281-E/SN and tape & reel packaging for MCP6281T-E/SN) provide identical electrical performance. These devices meet the core substitution criteria: single-circuit general-purpose rail-to-rail operational amplifiers in 8-SOIC packages with -40°C to 125°C operating temperature range and ROHS3 compliance. The MCP6281 series exhibits reduced slew rate (2.5 V/µs versus 25 V/µs), lower gain bandwidth product (5 MHz versus 50 MHz), higher input offset voltage (3 mV versus 100 µV), and reduced output current capability (25 mA versus 65 mA). These devices are suitable for applications where the original performance specifications exceed circuit requirements. Supply current consumption is significantly lower (450 µA versus 4.6 mA), providing power efficiency advantages in battery-powered applications.

MCP6291-E/SN (Microchip Technology)

The MCP6291-E/SN represents an intermediate performance alternative between the OPA365 series and the MCP6281 series. This device provides improved slew rate (7 V/µs) and gain bandwidth product (10 MHz) compared to the MCP6281, though both remain below OPA365 specifications. Input offset voltage (3 mV) and output current capability (25 mA) match the MCP6281 series. Supply current consumption (1 mA) is lower than the OPA365AIDR but higher than the MCP6281. The MCP6291-E/SN is supplied in tube packaging with 3,100 units in stock. This device is applicable to applications requiring moderate performance improvements over the MCP6281 while maintaining power efficiency benefits.

Frequently Asked Questions (FAQ)

Q: Can the OPA365AIDR be used as a direct replacement for the OPA365AIDRG4?

A: Yes. The OPA365AIDR is the manufacturer-recommended substitute with identical electrical specifications and pin configuration. The only difference is packaging format (Cut Tape/Digi-Reel versus Digi-Reel). No circuit modifications are required.

Q: What are the key differences between the OPA365AIDR and the MCP6281 series?

A: The OPA365AIDR provides superior performance in slew rate (25 V/µs versus 2.5 V/µs), gain bandwidth product (50 MHz versus 5 MHz), input bias current (0.2 pA versus 1 pA), input offset voltage (100 µV versus 3 mV), and output current capability (65 mA versus 25 mA). The MCP6281 series offers significantly lower supply current consumption (450 µA versus 4.6 mA), making it suitable for power-constrained applications.

Q: Are all substitute parts available in the same 8-SOIC package?

A: Yes. All listed substitute parts are housed in 8-SOIC packages with identical 0.154-inch (3.90 mm) width specifications. Pin configuration and PCB footprint compatibility are maintained across all alternatives.

Q: Do the substitute parts meet the same compliance requirements as the OPA365AIDRG4?

A: Yes. All substitute parts listed are ROHS3 compliant, REACH unaffected, and carry MSL rating of 1 (Unlimited). All devices operate across the -40°C to 125°C temperature range.

Q: Which substitute should be selected for applications requiring maximum performance?

A: The OPA365AIDR maintains the original OPA365AIDRG4 performance specifications and is the recommended choice for applications where slew rate, gain bandwidth product, and output current capability are critical design parameters.

Q: Which substitute should be selected for power-sensitive applications?

A: The MCP6281 series devices consume significantly lower supply current (450 µA) compared to the OPA365AIDR (4.6 mA), making them suitable for battery-powered or low-power applications where performance specifications do not require the higher slew rate and bandwidth of the OPA365 series.

Q: What is the difference between MCP6281-E/SN and MCP6281T-E/SN?

A: Both devices have identical electrical specifications. The primary difference is packaging: MCP6281-E/SN is supplied in tube format, while MCP6281T-E/SN is supplied in tape & reel format. Selection depends on assembly process requirements and volume considerations.

Q: Can the MCP6291-E/SN be used in applications originally designed for the OPA365AIDRG4?

A: The MCP6291-E/SN provides intermediate performance between the OPA365 and MCP6281 series. Substitution is valid only if circuit requirements do not exceed the MCP6291 specifications for slew rate (7 V/µs), gain bandwidth product (10 MHz), and output current capability (25 mA).