ISL28117FBZ Equivalent & Substitute Parts

Part Overview

The ISL28117FBZ is a general-purpose operational amplifier manufactured by Renesas Electronics Corporation, housed in an 8-SOIC surface-mount package. This device is classified as obsolete, which necessitates identification of equivalent substitute components for ongoing design requirements and production continuity. The ISL28117FBZ delivers a slew rate of 0.5 V/µs and gain bandwidth product of 1.5 MHz, suitable for general-purpose amplification applications with moderate bandwidth requirements.

Substiute Parts

ISL28117FBZ

Renesas Electronics CorporationIn Stock: 1738ISL28117FBZ Datasheet

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THS4601IDDA

Texas InstrumentsIn Stock: 1765THS4601IDDA Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the ISL28117FBZ is determined by compatibility across the following critical parameters:

Functional Compatibility Criteria:

• Amplifier type classification (general purpose)
• Single-circuit configuration
• Surface-mount technology with compatible package footprint (8-SOIC or equivalent 8-pin SO variants)

Electrical Operating Range Criteria:

• Supply voltage span must encompass or be compatible with the original 4.5 V to 40 V range
• Operating temperature range must support the required application environment
• Input bias current and input offset voltage characteristics must be acceptable for the target application

Regulatory & Compliance Criteria:

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

The THS4601IDDA from Texas Instruments is identified as a substitute part based on shared general-purpose amplifier classification, single-circuit configuration, and compatible 8-pin surface-mount packaging. However, this substitute exhibits significantly different electrical performance characteristics, including higher slew rate, higher gain bandwidth product, and different supply voltage specifications.

Parameter Comparison

Engineering Selection Recommendations

Product Status Consideration: The ISL28117FBZ is classified as obsolete, making the THS4601IDDA a viable alternative from an availability and long-term supply perspective. The THS4601IDDA maintains active product status with Texas Instruments, ensuring continued availability and manufacturing support.

Compliance & Regulatory Alignment: Both devices maintain ROHS3 compliance and REACH unaffected status, satisfying regulatory requirements for equivalent component selection. The THS4601IDDA offers improved moisture sensitivity classification (MSL 1 with unlimited shelf life versus MSL 2 with 1-year shelf life), providing enhanced storage and handling flexibility.

Electrical Performance Differences: The THS4601IDDA exhibits substantially higher performance specifications across multiple parameters: slew rate is 200 times greater (100 V/µs versus 0.5 V/µs), gain bandwidth product is 120 times greater (180 MHz versus 1.5 MHz), and supply current is approximately 23 times higher (10 mA versus 440 µA). These performance enhancements may introduce design considerations related to power consumption, thermal management, and circuit stability in applications originally designed for the lower-performance ISL28117FBZ.

Supply Voltage Compatibility: The THS4601IDDA operates within a narrower supply voltage range (10 V to 30 V) compared to the ISL28117FBZ (4.5 V to 40 V). Applications requiring operation at the extremes of the original supply range (below 10 V or above 30 V) require alternative component selection or circuit redesign.

Operating Temperature Range: The THS4601IDDA supports operation to 85°C maximum, compared to 125°C for the ISL28117FBZ. Applications requiring extended high-temperature operation must account for this reduced upper temperature limit.

Frequently Asked Questions (FAQ)

Q: Can the THS4601IDDA directly replace the ISL28117FBZ in existing designs?

A: Direct replacement is not recommended without circuit evaluation. While both devices are general-purpose operational amplifiers in compatible 8-pin surface-mount packages, the THS4601IDDA exhibits significantly different electrical characteristics. The higher slew rate, gain bandwidth product, and supply current may affect circuit stability, frequency response, and power consumption. Supply voltage range differences require verification against application requirements.

Q: What are the primary differences between the ISL28117FBZ and THS4601IDDA?

A: The devices differ substantially in performance specifications. The THS4601IDDA provides 200 times higher slew rate and 120 times higher gain bandwidth product, indicating suitability for higher-frequency applications. The THS4601IDDA consumes approximately 23 times more supply current. Supply voltage operating ranges differ, with the THS4601IDDA limited to 10 V to 30 V versus the ISL28117FBZ range of 4.5 V to 40 V. Maximum operating temperature differs by 40°C.

Q: Are the packages physically compatible?

A: Both devices use 8-pin surface-mount packages with identical 0.154" (3.90 mm) width. The ISL28117FBZ uses standard 8-SOIC packaging, while the THS4601IDDA uses 8-PowerSOIC packaging. The PowerSOIC variant includes an exposed thermal pad for enhanced heat dissipation. PCB footprints are compatible for standard pin connections, though the thermal pad design differs.

Q: What compliance certifications apply to both devices?

A: Both the ISL28117FBZ and THS4601IDDA maintain ROHS3 compliance and REACH unaffected status. The THS4601IDDA offers superior moisture sensitivity classification (MSL 1 with unlimited shelf life) compared to the ISL28117FBZ (MSL 2 with 1-year shelf life).

Q: Which device should be selected for new designs?

A: The THS4601IDDA is the appropriate selection for new designs due to its active product status, superior moisture sensitivity rating, and continued manufacturing support from Texas Instruments. The ISL28117FBZ obsolete status makes it unsuitable for new production designs requiring long-term component availability.

Q: How do input offset voltage specifications compare?

A: The ISL28117FBZ specifies 4 µV input offset voltage, while the THS4601IDDA specifies 1 mV (1000 µV). Applications requiring precision DC amplification with minimal offset drift should account for this 250-fold difference in specification.

Q: What are the implications of the higher supply current in the THS4601IDDA?

A: The THS4601IDDA draws approximately 10 mA supply current compared to 440 µA for the ISL28117FBZ. This 23-fold increase requires evaluation of power supply capacity, thermal dissipation requirements, and overall system power budget. Battery-powered or power-constrained applications may require alternative component selection.