OPA604APG4 Equivalent & Substitute Parts

Part Overview

The OPA604APG4 is a general-purpose operational amplifier manufactured by Texas Instruments, configured as a single-circuit integrated circuit in an 8-DIP through-hole package. This device is classified as obsolete, indicating discontinued production and limited availability in the market. The OPA604APG4 remains functional for existing applications but presents sourcing challenges due to its obsolete status. Identifying equivalent substitute parts with compatible electrical characteristics and alternative packaging options is essential for design continuity, production planning, and long-term component availability.

Substiute Parts

OPA604APG4

Texas InstrumentsIn Stock: 1092OPA604APG4 Datasheet

Current PartRFQ

OPA604AU/2K5

Texas InstrumentsIn Stock: 17860OPA604AU/2K5 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the OPA604APG4 is determined by electrical parameter equivalence across the operational amplifier's core performance specifications. The substitute part OPA604AU/2K5 maintains identical electrical characteristics including slew rate, gain bandwidth product, input bias current, input offset voltage, supply current, output current capability, and supply voltage range. Both parts are manufactured by Texas Instruments under the same base product number OPA604, ensuring functional compatibility at the circuit level.

The primary difference between the main part and its substitute lies in packaging and mounting technology. The OPA604APG4 uses through-hole 8-DIP packaging, while the OPA604AU/2K5 employs surface-mount 8-SOIC packaging. This distinction affects board-level integration, assembly processes, and physical layout considerations but does not alter electrical performance or functional operation.

Substitution eligibility is based on the following key parameters:

• Slew Rate: 25 V/µs (identical)
• Gain Bandwidth Product: 20 MHz (identical)
• Current - Input Bias: 5 pA (identical)
• Voltage - Input Offset: 1 mV (identical)
• Current - Supply: 5.3 mA (identical)
• Current - Output / Channel: 35 mA (identical)
• Voltage - Supply Span: 9 V to 48 V (identical)
• Operating Temperature Range: -25°C to 85°C (identical)

Parameter Comparison

Engineering Selection Recommendations

The OPA604AU/2K5 is the manufacturer-recommended substitute for the OPA604APG4. Both parts maintain full electrical equivalence across all specified performance parameters, ensuring functional compatibility in circuit applications. The OPA604AU/2K5 carries active product status, indicating ongoing manufacturing and reliable long-term availability, whereas the OPA604APG4 is obsolete and subject to supply constraints.

Both parts satisfy ROHS3 compliance and REACH unaffected status, meeting environmental and regulatory requirements for industrial and commercial applications. The OPA604AU/2K5 is currently in stock with significantly higher inventory levels (17,760 pieces) compared to the OPA604APG4 (1,027 pieces), supporting production continuity and supply chain stability.

The primary consideration for substitution is packaging transition from through-hole 8-DIP to surface-mount 8-SOIC technology. This change requires board redesign, assembly process modification, and soldering technique adjustment but does not impact electrical performance or functional operation. Organizations utilizing the OPA604APG4 in through-hole designs should evaluate the OPA604AU/2K5 for new production runs or redesigned circuit boards incorporating surface-mount assembly processes.

Frequently Asked Questions (FAQ)

Q: Are the OPA604APG4 and OPA604AU/2K5 electrically identical?

A: Yes. Both parts share identical electrical specifications including slew rate (25 V/µs), gain bandwidth product (20 MHz), input bias current (5 pA), input offset voltage (1 mV), supply current (5.3 mA), output current (35 mA), and supply voltage range (9 V to 48 V). Operating temperature range is also identical at -25°C to 85°C.

Q: What is the primary difference between these two parts?

A: The main difference is packaging and mounting technology. The OPA604APG4 uses through-hole 8-DIP packaging (0.300" width), while the OPA604AU/2K5 uses surface-mount 8-SOIC packaging (0.154" width). This affects board layout, assembly methods, and soldering processes but not electrical performance.

Q: Can I use the OPA604AU/2K5 as a direct replacement in an existing through-hole design?

A: No. The OPA604AU/2K5 requires surface-mount assembly and cannot be directly installed in through-hole PCB footprints designed for the OPA604APG4. Board redesign and assembly process modification are necessary for substitution.

Q: Why is the OPA604APG4 classified as obsolete?

A: The OPA604APG4 has been discontinued by Texas Instruments. The manufacturer has transitioned production to the OPA604AU/2K5 and other variants. Obsolete status indicates limited remaining inventory and no new manufacturing.

Q: Is the OPA604AU/2K5 suitable for new designs?

A: Yes. The OPA604AU/2K5 carries active product status and is recommended for new designs. It offers superior availability, ongoing manufacturing support, and compatibility with modern surface-mount assembly processes.

Q: Do both parts meet environmental compliance requirements?

A: Yes. Both the OPA604APG4 and OPA604AU/2K5 are ROHS3 compliant and REACH unaffected, satisfying environmental and regulatory standards for industrial applications.

Q: What is the moisture sensitivity difference between these parts?

A: The OPA604APG4 has Moisture Sensitivity Level 1 (unlimited), while the OPA604AU/2K5 has Moisture Sensitivity Level 3 (168 hours). The OPA604AU/2K5 requires controlled storage and handling conditions to prevent moisture absorption during manufacturing and assembly.

Q: Are there inventory advantages to using the OPA604AU/2K5?

A: Yes. The OPA604AU/2K5 has significantly higher current inventory (17,760 pieces) compared to the OPA604APG4 (1,027 pieces), providing better supply chain reliability and production planning flexibility.