OPA376AIDRG4 Equivalent & Substitute Parts

Part Overview

The OPA376AIDRG4 is a general-purpose operational amplifier manufactured by Texas Instruments, featuring a single circuit configuration with rail-to-rail output in an 8-SOIC surface mount package. This device is classified as discontinued at DiGi Electronics, necessitating identification of functionally equivalent alternatives for ongoing design requirements and production continuity. The part operates across a supply voltage range of 2.2 V to 5.5 V with an operating temperature range of -40°C to 125°C, making it suitable for low-power analog signal processing applications.

Substiute Parts

OPA376AIDRG4

Texas InstrumentsIn Stock: 2157OPA376AIDRG4 Datasheet

Current PartRFQ

OPA376AIDR

Texas InstrumentsIn Stock: 20506OPA376AIDR Datasheet

MFR RecommendedRFQ

MCP606-I/SN

Microchip TechnologyIn Stock: 35255MCP606-I/SN Datasheet

MFR RecommendedRFQ

MCP631-E/SN

Microchip TechnologyIn Stock: 2217MCP631-E/SN Datasheet

MFR RecommendedRFQ

RE46C311S8F

Microchip TechnologyIn Stock: 2876RE46C311S8F Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the OPA376AIDRG4 is determined by strict alignment of the following critical parameters:

Package Compatibility: All substitute parts must use the 8-SOIC (0.154", 3.90mm Width) surface mount package to ensure mechanical and electrical compatibility with existing PCB layouts.

Functional Classification: All candidates must be classified as general-purpose operational amplifiers with single circuit configuration and rail-to-rail output capability.

Supply Voltage Range: Substitute parts must support the minimum supply voltage of 2.2 V and maximum of 5.5 V to maintain circuit operation across the intended voltage domain.

Operating Temperature Range: The substitute must support at least the -40°C to 125°C operating temperature range specified for the OPA376AIDRG4.

Regulatory Compliance: All substitute parts must maintain ROHS3 compliance and REACH unaffected status to satisfy procurement and environmental requirements.

The four identified substitute parts—OPA376AIDR, MCP606-I/SN, MCP631-E/SN, and RE46C311S8F—meet these core substitution criteria. However, variations in secondary electrical parameters (slew rate, gain bandwidth product, input bias current, and supply current) create distinct performance profiles that determine application suitability.

Parameter Comparison

Engineering Selection Recommendations

OPA376AIDR (Primary Substitute)

The OPA376AIDR is the manufacturer-recommended substitute for the OPA376AIDRG4. This part is electrically and mechanically identical, differing only in packaging format (Cut Tape and Digi-Reel versus the original Digi-Reel configuration). The OPA376AIDR maintains active product status with significantly higher inventory availability (20,400 units in stock). All electrical parameters, supply voltage range, operating temperature range, and compliance certifications are identical to the discontinued OPA376AIDRG4. This part is the direct replacement for applications requiring no design modification.

MCP631-E/SN (High-Performance Alternative)

The MCP631-E/SN from Microchip Technology provides enhanced performance characteristics suitable for applications requiring higher slew rate (10 V/µs versus 2 V/µs) and gain bandwidth product (24 MHz versus 5.5 MHz). This part maintains the full operating temperature range (-40°C to 125°C) and supply voltage compatibility (2.5 V to 5.5 V minimum). The MCP631-E/SN is appropriate for signal processing applications where faster transient response and higher frequency operation are required. Inventory availability is adequate at 2,140 units.

MCP606-I/SN (Low-Power Alternative)

The MCP606-I/SN is suitable for ultra-low-power applications where supply current minimization is critical. This part operates at 18.7 µA supply current compared to 760 µA for the OPA376AIDRG4, representing a 40-fold reduction. However, the MCP606-I/SN exhibits significantly reduced slew rate (0.08 V/µs) and gain bandwidth product (155 kHz), limiting its use to low-frequency signal conditioning. The operating temperature range is restricted to -40°C to 85°C. This part is not suitable for applications requiring the full -40°C to 125°C temperature range. Inventory is abundant at 35,200 units.

RE46C311S8F (Extreme Low-Power Alternative)

The RE46C311S8F is designed for ultra-low-power applications with supply current of only 600 nA. This part is appropriate exclusively for battery-powered or energy-harvesting applications where power consumption is the dominant design constraint. The RE46C311S8F exhibits extremely limited bandwidth (10 kHz gain bandwidth product) and slew rate (0.003 V/µs), making it unsuitable for general-purpose signal processing. The operating temperature range is restricted to -10°C to 60°C, eliminating this part from applications requiring extended temperature operation. Inventory is limited at 2,835 units.

Frequently Asked Questions (FAQ)

Q: Can the OPA376AIDR be used as a direct replacement for the OPA376AIDRG4 without circuit modification?

A: Yes. The OPA376AIDR is electrically and functionally identical to the OPA376AIDRG4. The only difference is packaging format. Both parts use the 8-SOIC package with identical pinout, electrical specifications, and operating ranges. No circuit modification is required.

Q: What is the primary reason for substituting the OPA376AIDRG4?

A: The OPA376AIDRG4 is discontinued at DiGi Electronics. The OPA376AIDR provides active product status with equivalent performance and higher inventory availability, ensuring long-term supply continuity.

Q: Can the MCP631-E/SN replace the OPA376AIDRG4 in all applications?

A: The MCP631-E/SN is mechanically and functionally compatible but exhibits different electrical performance. The higher slew rate (10 V/µs) and gain bandwidth product (24 MHz) make it suitable for higher-frequency applications. However, the increased supply current (2.5 mA) may impact power-sensitive designs. Circuit validation is necessary for applications with strict power budgets.

Q: Is the MCP606-I/SN suitable for applications operating at 125°C?

A: No. The MCP606-I/SN is rated only to 85°C maximum operating temperature. Applications requiring operation at 125°C must use the OPA376AIDR, MCP631-E/SN, or RE46C311S8F.

Q: What is the key limitation of the RE46C311S8F?

A: The RE46C311S8F is designed exclusively for ultra-low-power applications. The gain bandwidth product of 10 kHz and slew rate of 0.003 V/µs restrict this part to DC and very-low-frequency signal conditioning. The operating temperature range of -10°C to 60°C further limits applicability. This part is not suitable for general-purpose amplification.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All identified substitute parts—OPA376AIDR, MCP606-I/SN, MCP631-E/SN, and RE46C311S8F—are ROHS3 compliant and REACH unaffected, meeting environmental and regulatory requirements.

Q: What is the difference between the OPA376AIDRG4 and OPA376AIDR packaging?

A: The OPA376AIDRG4 is supplied in Digi-Reel format. The OPA376AIDR is available in both Cut Tape (CT) and Digi-Reel formats. Both use the identical 8-SOIC package with no mechanical or electrical differences.

Q: Can the MCP631-E/SN be used in applications with 2.2 V minimum supply voltage?

A: No. The MCP631-E/SN requires a minimum supply voltage of 2.5 V. Applications with 2.2 V minimum supply must use the OPA376AIDR or RE46C311S8F.

Q: Which substitute part has the lowest input offset voltage?

A: The OPA376AIDR maintains the lowest input offset voltage at 5 µV, identical to the OPA376AIDRG4. The MCP606-I/SN exhibits 250 µV, the MCP631-E/SN exhibits 1.8 mV, and the RE46C311S8F exhibits 3 mV.

Q: What is the moisture sensitivity level difference between the OPA376AIDR and other substitutes?

A: The OPA376AIDR maintains MSL 2 (1 Year) identical to the OPA376AIDRG4. The MCP606-I/SN, MCP631-E/SN, and RE46C311S8F all have MSL 1 (Unlimited), indicating superior moisture resistance and longer shelf life without baking requirements.