OPA604AP Equivalent & Substitute Parts

Part Overview

The OPA604AP is a general-purpose operational amplifier manufactured by Texas Instruments, housed in an 8-DIP through-hole package. This device is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity. The OPA604AP delivers a 20 MHz gain-bandwidth product with a 25 V/µs slew rate, suitable for general-purpose amplification applications requiring moderate bandwidth and speed performance.

Substiute Parts

OPA604AP

Texas InstrumentsIn Stock: 6308OPA604AP Datasheet

Current PartRFQ

OPA604AU/2K5

Texas InstrumentsIn Stock: 17860OPA604AU/2K5 Datasheet

MFR RecommendedRFQ

AD711AQ

Analog Devices Inc.In Stock: 1829AD711AQ Datasheet

MFR RecommendedRFQ

AD711JNZ

Analog Devices Inc.In Stock: 2956AD711JNZ Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the OPA604AP is determined by electrical and mechanical compatibility across the following critical parameters:

Electrical Compatibility Criteria:

• Amplifier Type: General Purpose
• Number of Circuits: 1
• Slew Rate: 25 V/µs (minimum acceptable)
• Gain Bandwidth Product: 20 MHz (minimum acceptable)
• Current - Input Bias: 5 pA (maximum acceptable)
• Voltage - Input Offset: 1 mV (maximum acceptable)
• Current - Supply: 5.3 mA (maximum acceptable)
• Current - Output / Channel: 35 mA (minimum acceptable)
• Voltage - Supply Span: 9 V to 48 V (operating range)
• Operating Temperature: -25°C ~ 85°C (minimum acceptable range)

Mechanical Compatibility Criteria:

• Mounting Type: Through Hole or Surface Mount (with PCB design accommodation)
• Package / Case: 8-DIP, 8-SOIC, or 8-CERDIP (8-pin configurations)

Substitute parts are grouped based on whether they meet or exceed these electrical specifications while maintaining functional equivalence. Parts with different amplifier types (such as J-FET variants) are included when electrical parameters remain within acceptable tolerance ranges for the application.

Parameter Comparison

Engineering Selection Recommendations

OPA604AU/2K5 (Texas Instruments)

The OPA604AU/2K5 is the primary substitute for the OPA604AP. Both devices share identical electrical specifications: 25 V/µs slew rate, 20 MHz gain-bandwidth product, 5 pA input bias current, 1 mV input offset voltage, and 9 V to 48 V supply span. The OPA604AU/2K5 is currently in active production status, ensuring long-term availability. The primary difference is packaging: OPA604AU/2K5 uses 8-SOIC surface-mount configuration versus the through-hole 8-DIP of the OPA604AP. This substitution requires PCB redesign for surface-mount implementation. Both parts are ROHS3 compliant. The OPA604AU/2K5 has MSL rating of 3 (168 Hours) compared to MSL 1 (Unlimited) for the OPA604AP, requiring moisture control during storage and handling.

AD711AQ (Analog Devices Inc.)

The AD711AQ is a J-FET amplifier substitute with active product status. Electrical performance differs from the OPA604AP: slew rate is 20 V/µs (versus 25 V/µs), gain-bandwidth product is 4 MHz (versus 20 MHz), input bias current is 15 pA (versus 5 pA), and input offset voltage is 300 µV (versus 1 mV). Maximum supply voltage is 36 V (versus 48 V). The AD711AQ operates across -40°C to 85°C, exceeding the OPA604AP's -25°C to 85°C range. Mounting type is through-hole with 8-CDIP package (0.300", 7.62mm), compatible with through-hole PCB designs. MSL rating is 1 (Unlimited). This substitute is suitable for applications where lower bandwidth and reduced slew rate are acceptable, and where J-FET input characteristics provide circuit advantages.

AD711JNZ (Analog Devices Inc.)

The AD711JNZ is a J-FET amplifier in 8-DIP through-hole package, matching the OPA604AP's mechanical form factor. Electrical specifications are identical to the AD711AQ: 20 V/µs slew rate, 4 MHz gain-bandwidth product, 15 pA input bias current, 300 µV input offset voltage, and 36 V maximum supply voltage. Operating temperature range is 0°C to 70°C, narrower than the OPA604AP's -25°C to 85°C. Packaging in Tube format and 8-DIP configuration enables direct PCB replacement without redesign. MSL rating is 1 (Unlimited). This substitute is suitable for through-hole designs where bandwidth and slew rate reduction are acceptable.

Frequently Asked Questions (FAQ)

Q: Can OPA604AU/2K5 directly replace OPA604AP on existing PCBs?

A: No. The OPA604AU/2K5 uses 8-SOIC surface-mount packaging, while OPA604AP uses 8-DIP through-hole packaging. Direct PCB replacement is not possible without redesign. Surface-mount footprints and through-hole footprints are mechanically incompatible. PCB layout modification is required.

Q: What are the key electrical differences between OPA604AP and AD711AQ?

A: The AD711AQ has lower slew rate (20 V/µs versus 25 V/µs), lower gain-bandwidth product (4 MHz versus 20 MHz), higher input bias current (15 pA versus 5 pA), lower input offset voltage (300 µV versus 1 mV), and lower maximum supply voltage (36 V versus 48 V). The AD711AQ uses J-FET input technology, while OPA604AP uses general-purpose bipolar input technology. These differences affect circuit performance in bandwidth-sensitive and high-impedance applications.

Q: Can AD711JNZ replace OPA604AP in a through-hole design?

A: AD711JNZ shares the same 8-DIP through-hole package as OPA604AP, enabling mechanical compatibility. However, electrical performance differs significantly. The AD711JNZ has 20 V/µs slew rate (versus 25 V/µs), 4 MHz bandwidth (versus 20 MHz), and 36 V maximum supply (versus 48 V). Substitution is valid only if the application tolerates these reduced electrical specifications. Operating temperature range is 0°C to 70°C, narrower than OPA604AP's -25°C to 85°C.

Q: What is the impact of MSL rating differences?

A: OPA604AP has MSL 1 (Unlimited), allowing indefinite storage without moisture control. OPA604AU/2K5 has MSL 3 (168 Hours), requiring baking and moisture control if storage exceeds 168 hours at specified humidity levels. AD711AQ and AD711JNZ have MSL 1 (Unlimited). For high-volume production with extended storage, MSL 3 components require additional handling procedures.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. OPA604AP, OPA604AU/2K5, AD711AQ, and AD711JNZ are all ROHS3 compliant. All parts are REACH Unaffected and classified as EAR99 for export control purposes.

Q: Which substitute provides the closest electrical match to OPA604AP?

A: OPA604AU/2K5 provides identical electrical specifications to OPA604AP: 25 V/µs slew rate, 20 MHz gain-bandwidth product, 5 pA input bias current, 1 mV input offset voltage, 5.3 mA supply current, 35 mA output current, and 9 V to 48 V supply span. The only differences are packaging (8-SOIC versus 8-DIP) and MSL rating (3 versus 1). This is the recommended substitute for applications requiring equivalent electrical performance.

Q: What is the inventory status of substitute parts?

A: OPA604AU/2K5 has 17,760 pieces in stock. AD711AQ has 1,778 pieces in stock. AD711JNZ has 2,903 pieces in stock. OPA604AP (obsolete) has 6,240 pieces in stock. All substitute parts are currently available.