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ISL28127FUBZ Equivalent & Substitute Parts
Part Overview
The ISL28127FUBZ is a general-purpose operational amplifier manufactured by Renesas Electronics Corporation, packaged in 8-MSOP surface mount configuration. This device is classified as obsolete, necessitating identification of active equivalent and substitute components for ongoing design support and procurement continuity. The ISL28127FUBZ delivers 1 circuit with a 10 MHz gain bandwidth product and 3.6 V/µs slew rate, suitable for general-purpose amplification applications requiring moderate bandwidth and speed performance.
Substiute Parts
Key Parameters
| Parameter | Value | Unit |
|---|---|---|
| Manufacturer | Renesas Electronics Corporation | |
| Part Number | ISL28127FUBZ | |
| Amplifier Type | General Purpose | |
| Number of Circuits | 1 | |
| Package / Case | 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) | |
| Slew Rate | 3.6 | V/µs |
| Gain Bandwidth Product | 10 | MHz |
| Current - Input Bias | 1 | nA |
| Voltage - Input Offset | 10 | µV |
| Current - Supply | 2.2 | mA |
| Current - Output / Channel | 45 | mA |
| Voltage - Supply Span (Min) | 4.5 | V |
| Voltage - Supply Span (Max) | 40 | V |
| Operating Temperature | -40°C ~ 125°C | |
| Mounting Type | Surface Mount | |
| Product Status | Obsolete | |
| RoHS Status | ROHS3 Compliant | |
| Moisture Sensitivity Level (MSL) | 3 (168 Hours) |
Substitute Part Grouping Explanation
Substitution of the ISL28127FUBZ requires matching of critical electrical and mechanical parameters within the linear amplifier category. The primary substitution criteria are:
Mechanical Compatibility: All substitute parts must use 8-MSOP surface mount packaging with 0.118" (3.00mm) width to ensure PCB footprint compatibility.
Electrical Performance Envelope: Substitute parts must operate within the supply voltage range of 4.5 V to 40 V minimum and maximum specifications. The slew rate, gain bandwidth product, input bias current, and output current drive capability define the performance class of the device.
Functional Classification: The ISL28127FUBZ is a general-purpose amplifier. Substitute parts classified as instrumentation amplifiers or current feedback amplifiers represent different functional architectures and are listed as alternatives only when electrical parameters align with application requirements.
Compliance & Status: Active product status is preferred for long-term availability. RoHS3 compliance and REACH unaffected status are maintained across all listed substitutes.
The substitute parts are grouped into two categories: Analog Devices AD8221 series (instrumentation amplifiers with lower bandwidth), Analog Devices AD8421 series (instrumentation amplifiers with higher bandwidth matching ISL28127FUBZ performance), and Texas Instruments THS3001 series (current feedback amplifiers with significantly higher performance).
Parameter Comparison
| Parameter | ISL28127FUBZ | AD8221ARMZ | AD8421ARMZ | AD8421TRMZ-EP | THS3001CDGN |
|---|---|---|---|---|---|
| Manufacturer | Renesas | Analog Devices | Analog Devices | Analog Devices | Texas Instruments |
| Amplifier Type | General Purpose | Instrumentation | Instrumentation | Instrumentation | Current Feedback |
| Package | 8-MSOP | 8-MSOP | 8-MSOP | 8-MSOP | 8-HVSSOP |
| Slew Rate (V/µs) | 3.6 | 2 | 35 | 35 | 6500 |
| Gain Bandwidth Product (MHz) | 10 | 0.825 | 10 | 10 | 1750 |
| Current - Input Bias (nA) | 1 | 0.5 | 1 | 1 | 2000 |
| Voltage - Input Offset (µV) | 10 | 60 | 60 | 70 | 1000 |
| Current - Supply (mA) | 2.2 | 0.9 | 2 | 2 | 6.6 |
| Current - Output / Channel (mA) | 45 | 18 | 65 | 65 | 120 |
| Voltage - Supply Span Min (V) | 4.5 | 4.6 | 5 | 5 | 9 |
| Voltage - Supply Span Max (V) | 40 | 36 | 36 | 36 | 33 |
| Operating Temperature (°C) | -40 ~ 125 | -40 ~ 85 | -40 ~ 85 | -55 ~ 125 | 0 ~ 70 |
| Product Status | Obsolete | Active | Active | Active | Last Time Buy |
| RoHS Status | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant |
| MSL Rating | 3 (168 Hours) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) |
Engineering Selection Recommendations
Primary Substitute: AD8421ARMZ, AD8421ARMZ-R7, AD8421ARMZ-RL, AD8421TRMZ-EP, AD8421TRMZ-EP-R7
The AD8421 series from Analog Devices provides the closest electrical performance match to the ISL28127FUBZ. These instrumentation amplifiers deliver identical 10 MHz gain bandwidth product and 35 V/µs slew rate, exceeding the original device performance. All AD8421 variants maintain 1 nA input bias current and operate within compatible supply voltage ranges (5 V to 36 V). The AD8421TRMZ-EP variant extends operating temperature to -55°C ~ 125°C, matching the ISL28127FUBZ temperature range. All AD8421 parts are active products with ROHS3 compliance and unlimited MSL rating, ensuring long-term procurement availability.
Secondary Substitute: AD8221ARMZ, AD8221ARMZ-R7, AD8221ARMZ-RL
The AD8221 series provides a lower-bandwidth alternative at 825 kHz with reduced slew rate of 2 V/µs. This option is suitable only for applications where the ISL28127FUBZ bandwidth was not fully utilized. The AD8221 series offers superior input bias current performance (500 pA) and lower supply current (900 µA). All variants are active products with unlimited MSL rating.
Alternative Substitute: THS3001CDGN, THS3001HVCDGN
The THS3001 series current feedback amplifiers deliver significantly higher performance with 1.75 GHz gain bandwidth product and 6500 V/µs slew rate. These devices are classified as Last Time Buy status and operate within a narrower supply voltage range (9 V to 33 V or 37 V). The THS3001 series is suitable only for applications requiring substantially higher bandwidth and speed than the ISL28127FUBZ. Package compatibility is maintained at 8-MSOP with exposed pad configuration.
Compliance Considerations: All recommended substitutes maintain ROHS3 compliance and REACH unaffected status. The AD8421 series offers superior moisture sensitivity rating (MSL 1 Unlimited) compared to the original ISL28127FUBZ (MSL 3, 168 Hours), reducing handling and storage constraints.
Frequently Asked Questions (FAQ)
Q: Can the AD8221 series directly replace the ISL28127FUBZ in all applications?
A: The AD8221 series operates at 825 kHz bandwidth, significantly lower than the ISL28127FUBZ 10 MHz specification. Direct replacement is limited to applications where the original 10 MHz bandwidth was not required. Electrical parameter compatibility exists for supply voltage, package, and circuit count, but performance envelope differs substantially.
Q: What is the primary advantage of AD8421 series substitution?
A: The AD8421 series matches the ISL28127FUBZ gain bandwidth product (10 MHz) and exceeds slew rate performance (35 V/µs versus 3.6 V/µs). All AD8421 variants are active products with unlimited MSL rating, providing superior long-term availability and handling flexibility compared to the obsolete ISL28127FUBZ.
Q: Are the AD8421ARMZ and AD8421TRMZ-EP variants interchangeable?
A: Both variants share identical electrical specifications and 8-MSOP packaging. The primary difference is operating temperature range: AD8421ARMZ operates -40°C ~ 85°C, while AD8421TRMZ-EP extends to -55°C ~ 125°C. Selection depends on application temperature requirements. Packaging format differs (Tube versus Cut Tape/Digi-Reel), affecting procurement and handling.
Q: Why is the THS3001 series listed as an alternative rather than a direct substitute?
A: The THS3001 series represents a different amplifier architecture (current feedback versus general purpose/instrumentation). While package compatibility exists at 8-MSOP, the performance envelope differs dramatically (1.75 GHz bandwidth, 6500 V/µs slew rate). Additionally, THS3001 is classified as Last Time Buy status, limiting long-term availability. Substitution is appropriate only for applications requiring substantially higher performance specifications.
Q: What packaging options are available across substitute parts?
A: All substitute parts maintain 8-MSOP surface mount packaging with 0.118" (3.00mm) width, ensuring PCB footprint compatibility. Packaging format variations include Tube, Cut Tape (CT) & Digi-Reel®, and Tape & Reel (TR), affecting procurement and handling but not electrical or mechanical compatibility.
Q: How does moisture sensitivity level (MSL) affect component selection?
A: The ISL28127FUBZ carries MSL 3 rating (168 Hours), requiring controlled storage and handling. All substitute parts carry MSL 1 (Unlimited) rating, eliminating moisture sensitivity constraints. This represents a significant advantage for inventory management and reduces risk of moisture-induced failures during storage and assembly.
Q: Are all substitute parts RoHS3 compliant?
A: All listed substitute parts maintain ROHS3 compliance and REACH unaffected status, matching the environmental compliance profile of the ISL28127FUBZ. No additional compliance verification is required for substitution in RoHS3-regulated applications.
Q: What is the supply voltage compatibility range for substitution?
A: The ISL28127FUBZ operates 4.5 V to 40 V. AD8421 series operates 5 V to 36 V (compatible within 5 V to 36 V overlap). AD8221 series operates 4.6 V to 36 V (compatible within 4.6 V to 36 V overlap). THS3001 series operates 9 V to 33 V or 37 V (compatible only within 9 V to 33 V overlap). Supply voltage range must be verified for each application before substitution.
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