OPA627BP Equivalent & Substitute Parts

Part Overview

The OPA627BP is a general-purpose operational amplifier manufactured by Texas Instruments, housed in an 8-DIP through-hole package. This device is classified as obsolete, though 1606 units remain available in new original stock. The OPA627BP operates as a Difet® series amplifier with a single circuit configuration, designed for applications requiring low input bias current and moderate bandwidth performance.

Due to its obsolete product status, identifying functionally compatible substitute components is essential for ongoing design support, production continuity, and long-term system reliability. Substitutes must maintain electrical compatibility within the specified parameter ranges while accommodating potential packaging and mounting differences.

Substiute Parts

OPA627BP

Texas InstrumentsIn Stock: 1699OPA627BP Datasheet

Current PartRFQ

OPA828IDR

Texas InstrumentsIn Stock: 16747OPA828IDR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution compatibility for the OPA627BP is determined by the following critical parameters:

Electrical Compatibility Criteria:

• Input bias current specification (1 pA maximum)
• Input offset voltage specification (40 µV maximum)
• Supply voltage range overlap (minimum 9 V to 36 V maximum)
• Output current capability (minimum 45 mA per channel)
• Single circuit configuration requirement

Functional Performance Criteria:

• Slew rate performance (55 V/µs or greater)
• Gain bandwidth product (16 MHz or greater)
• Supply current consumption (7 mA or less preferred for power-sensitive applications)
• Operating temperature range coverage

Compliance & Certification Criteria:

• RoHS3 compliance status
• REACH unaffected classification
• Moisture sensitivity level compatibility

The OPA828IDR qualifies as a manufacturer-recommended substitute based on meeting or exceeding all electrical parameters, maintaining full compliance certifications, and providing enhanced performance characteristics across slew rate and bandwidth metrics.

Parameter Comparison

Engineering Selection Recommendations

Substitution Feasibility:

The OPA828IDR is a valid substitute for the OPA627BP based on the following engineering criteria:

Electrical Parameter Compliance: The OPA828IDR meets or exceeds all critical electrical specifications of the OPA627BP. Input bias current remains at 1 pA, matching the original specification. Input offset voltage increases from 40 µV to 50 µV, remaining within acceptable tolerance for general-purpose amplifier applications. Supply voltage range compatibility is maintained, with the OPA828IDR supporting 8 V to 36 V operation. Supply current consumption is reduced to 5.5 mA, providing improved power efficiency. Output current capability is 30 mA, which is lower than the original 45 mA specification and must be evaluated against application requirements.

Performance Enhancement: The OPA828IDR provides superior dynamic performance with slew rate increased to 150 V/µs and gain bandwidth product increased to 45 MHz, enabling faster signal processing and improved transient response compared to the OPA627BP.

Product Status & Availability: The OPA828IDR maintains active product status with 16,718 units in new original stock, ensuring long-term availability and supply chain continuity. The OPA627BP, classified as obsolete with limited remaining inventory, presents supply risk for future production requirements.

Compliance & Certification: Both devices maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory compatibility. Moisture sensitivity level increases from MSL 1 to MSL 2, requiring storage and handling within a 1-year moisture exposure window for the substitute.

Packaging Consideration: The OPA828IDR utilizes 8-SOIC surface-mount packaging, requiring PCB redesign compared to the through-hole 8-DIP package of the OPA627BP. This transition necessitates layout modification and assembly process adjustment.

Frequently Asked Questions (FAQ)

Q: Can the OPA828IDR directly replace the OPA627BP without circuit modification?

A: Electrical substitution is feasible based on parameter compatibility. However, the OPA828IDR uses 8-SOIC surface-mount packaging while the OPA627BP uses 8-DIP through-hole packaging. Direct socket replacement is not possible without PCB redesign and component footprint modification. A surface-mount to through-hole adapter may be used as an interim solution for prototype or low-volume applications.

Q: What is the impact of the reduced output current specification in the OPA828IDR?

A: The OPA828IDR provides 30 mA output current per channel compared to 45 mA in the OPA627BP. Applications requiring output currents exceeding 30 mA must incorporate external buffering or current amplification stages. Verify load impedance and current requirements against the 30 mA specification before substitution.

Q: How does the expanded operating temperature range of the OPA828IDR affect substitution?

A: The OPA828IDR operates from -40°C to 125°C, compared to the OPA627BP range of -25°C to 85°C. This expanded range provides additional thermal margin for applications operating at temperature extremes. The substitute is fully compatible with the original temperature specification and provides enhanced performance at lower and higher temperature boundaries.

Q: What are the implications of the increased input offset voltage in the OPA828IDR?

A: Input offset voltage increases from 40 µV to 50 µV. For precision DC applications requiring offset voltage below 50 µV, external offset nulling or calibration may be necessary. For AC-coupled or high-gain applications, this 10 µV increase typically has negligible impact on system performance.

Q: Is moisture sensitivity level change from MSL 1 to MSL 2 significant?

A: MSL 2 classification requires storage and handling within a 1-year moisture exposure window, compared to unlimited exposure for MSL 1 devices. Implement appropriate moisture control measures during storage, including desiccant packaging and controlled humidity environments. This requirement is standard for surface-mount components and does not prevent substitution in properly managed supply chains.

Q: What advantages does the OPA828IDR provide beyond substitution compatibility?

A: The OPA828IDR delivers 2.7× higher slew rate (150 V/µs versus 55 V/µs) and 2.8× higher gain bandwidth product (45 MHz versus 16 MHz), enabling improved signal fidelity and faster transient response. Supply current consumption is reduced by 21%, providing power efficiency benefits. Active product status ensures long-term availability and design support.

Q: Are there applications where the OPA627BP cannot be substituted with the OPA828IDR?

A: Applications requiring output currents exceeding 30 mA without external buffering cannot use the OPA828IDR as a direct substitute. Through-hole mounting requirements in existing PCB designs necessitate adapter solutions or complete redesign. Applications with strict MSL 1 moisture sensitivity requirements may require alternative substitutes with unlimited moisture exposure classification.