OP16FN8#PBF Equivalent & Substitute Parts

Part Overview

The OP16FN8#PBF is a J-FET input operational amplifier manufactured by Analog Devices Inc., configured as a single-circuit device in an 8-DIP through-hole package. This linear amplifier is designated as Last Time Buy, indicating discontinued production with limited inventory availability. The part operates across a 20V to 36V supply span and is suitable for applications requiring low input bias current and precision amplification in the 0°C to 70°C temperature range. Due to its Last Time Buy status, identification of functionally equivalent alternatives is necessary for design continuity and long-term component sourcing.

Substiute Parts

OP16FN8#PBF

Analog Devices Inc.In Stock: 1045OP16FN8#PBF Datasheet

Current PartRFQ

ADA4625-2ARDZ

Analog Devices Inc.In Stock: 1388ADA4625-2ARDZ Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the OP16FN8#PBF is determined by the following critical parameters: J-FET amplifier topology, supply voltage compatibility, input bias current characteristics, and compliance certifications. The ADA4625-2ARDZ qualifies as a manufacturer-recommended substitute based on shared J-FET amplifier architecture and overlapping supply voltage range (5V to 36V encompasses the OP16FN8#PBF minimum requirement of 20V). Both devices maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment.

Key substitution criteria include:

• Amplifier Type: J-FET input configuration
• Supply Voltage Compatibility: Minimum 20V operation supported
• Input Bias Current: Low picoampere-range performance
• Regulatory Compliance: ROHS3 and REACH status alignment
• Manufacturer: Analog Devices Inc.

The ADA4625-2ARDZ represents an enhanced alternative with improved performance specifications, including higher slew rate (48V/µs versus 18V/µs), greater gain bandwidth product (18MHz versus 7.6MHz), and extended operating temperature range (-40°C to 125°C). However, this substitute introduces a dual-circuit configuration and surface-mount packaging, requiring circuit design and PCB layout modifications.

Parameter Comparison

Engineering Selection Recommendations

Selection between OP16FN8#PBF and ADA4625-2ARDZ depends on application-specific requirements and design constraints:

OP16FN8#PBF Retention: Maintain this part for existing designs where through-hole mounting is required, single-channel operation is specified, and the 0°C to 70°C temperature range is sufficient. The part's Last Time Buy status requires immediate inventory assessment and long-term supply planning.

ADA4625-2ARDZ Substitution: Implement this substitute in new designs or redesigns where surface-mount technology is acceptable, dual-channel integration provides circuit efficiency, and extended temperature operation (-40°C to 125°C) is beneficial. The improved performance metrics (higher slew rate, greater bandwidth, lower input offset voltage) support applications requiring enhanced dynamic response and precision.

Both devices maintain identical regulatory compliance (ROHS3, REACH unaffected) and manufacturer support through Analog Devices Inc., ensuring long-term availability and technical documentation access. The ADA4625-2ARDZ offers superior performance specifications and active product status, positioning it as the preferred choice for new development initiatives.

Frequently Asked Questions (FAQ)

Q: Can the ADA4625-2ARDZ directly replace the OP16FN8#PBF in existing PCB layouts?

A: No. The ADA4625-2ARDZ uses surface-mount 8-SOIC packaging versus the OP16FN8#PBF through-hole 8-DIP package. PCB redesign is required, including footprint modification and routing adjustments. Additionally, the ADA4625-2ARDZ is a dual-channel device, requiring circuit topology evaluation.

Q: What are the key electrical differences between these devices?

A: The ADA4625-2ARDZ provides superior performance: 48V/µs slew rate (versus 18V/µs), 18MHz gain bandwidth product (versus 7.6MHz), and 100µV input offset voltage (versus 400µV). However, the ADA4625-2ARDZ exhibits higher input bias current (7nA versus 30pA). Both maintain J-FET input architecture and 36V maximum supply voltage compatibility.

Q: Is the OP16FN8#PBF still available for new orders?

A: The OP16FN8#PBF is designated Last Time Buy with 1031 pieces in current inventory. This status indicates discontinued production. New designs should transition to the ADA4625-2ARDZ or evaluate alternative J-FET amplifiers for long-term supply assurance.

Q: Do both devices meet the same regulatory requirements?

A: Yes. Both the OP16FN8#PBF and ADA4625-2ARDZ are ROHS3 compliant and REACH unaffected, satisfying identical regulatory frameworks. Both carry EAR99 ECCN classification and 8542.33.0001 HTSUS code.

Q: What is the impact of the dual-channel configuration in the ADA4625-2ARDZ?

A: The ADA4625-2ARDZ integrates two independent amplifier circuits in a single package. Applications requiring only one channel can utilize a single device, reducing component count. Alternatively, both channels can be employed for stereo or differential applications, improving space efficiency compared to using two single-channel OP16FN8#PBF devices.

Q: Are there temperature range limitations when substituting?

A: The OP16FN8#PBF operates 0°C to 70°C, while the ADA4625-2ARDZ operates -40°C to 125°C. For applications within the OP16FN8#PBF range, the ADA4625-2ARDZ is fully compatible. Applications requiring operation below 0°C or above 70°C must use the ADA4625-2ARDZ or identify alternative J-FET amplifiers.

Q: How does the input bias current difference affect circuit design?

A: The OP16FN8#PBF exhibits 30pA input bias current, while the ADA4625-2ARDZ exhibits 7nA. For high-impedance input circuits, the OP16FN8#PBF provides superior performance. For general-purpose applications, the ADA4625-2ARDZ's higher bias current is typically acceptable and offset by improved precision (lower input offset voltage).