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ISL28127FUZ Equivalent & Substitute Parts
Part Overview
The ISL28127FUZ is a General Purpose Amplifier manufactured by Renesas Electronics Corporation, housed in an 8-MSOP surface mount package. This device is classified as obsolete, necessitating identification of active equivalent and substitute components for ongoing design requirements and production continuity. The ISL28127FUZ delivers a 10 MHz gain bandwidth product with a 3.6 V/µs slew rate, suitable for general-purpose amplification applications requiring moderate bandwidth and speed characteristics.
Substiute Parts
Key Parameters
| Parameter | Value | Unit |
|---|---|---|
| Amplifier Type | General Purpose | — |
| Number of Circuits | 1 | — |
| 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 to 125 | °C |
| Package / Case | 8-MSOP | — |
| Mounting Type | Surface Mount | — |
| RoHS Status | ROHS3 Compliant | — |
| Moisture Sensitivity Level | 3 (168 Hours) | — |
Substitute Part Grouping Explanation
Substitution of the ISL28127FUZ is determined by compatibility across the following critical parameters: package type (8-MSOP surface mount), amplifier topology, number of circuits (single channel), supply voltage range, operating temperature span, and functional performance metrics including slew rate, gain bandwidth product, and output current capability.
The substitute parts identified fall into two functional categories:
Category 1: Instrumentation Amplifiers (AD8221 and AD8421 Series) These parts share the 8-MSOP package and single-circuit configuration. The AD8221 series operates at lower bandwidth (825 kHz) with reduced slew rate (2 V/µs) and lower supply current (900 µA), suitable for precision measurement applications. The AD8421 series provides higher performance with 10 MHz bandwidth and 35 V/µs slew rate, matching the ISL28127FUZ bandwidth specification while exceeding slew rate performance. All AD8221 and AD8421 variants maintain ROHS3 compliance and operate across -40°C to 85°C (standard variants) or -55°C to 125°C (EP variants).
Category 2: Current Feedback Amplifier (THS3001 Series) The THS3001 series represents a different amplifier topology (current feedback versus general purpose) with significantly higher performance: 6500 V/µs slew rate, 1.75 GHz gain bandwidth product, and 420 MHz -3dB bandwidth. This category is suitable only for applications requiring substantially higher speed and bandwidth than the original ISL28127FUZ specification. The THS3001 series operates at 0°C to 70°C and carries Last Time Buy status.
Parameter Comparison
| Parameter | ISL28127FUZ | AD8221ARMZ | AD8421ARMZ | AD8421TRMZ-EP-R7 | THS3001CDGN |
|---|---|---|---|---|---|
| Amplifier Type | General Purpose | Instrumentation | Instrumentation | Instrumentation | Current Feedback |
| Number of Circuits | 1 | 1 | 1 | 1 | 1 |
| Slew Rate (V/µs) | 3.6 | 2 | 35 | 35 | 6500 |
| Gain Bandwidth Product (MHz) | 10 | — | 10 | 10 | 1750 |
| -3dB Bandwidth (MHz) | — | 0.825 | 10 | 10 | 420 |
| 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 to 125 | -40 to 85 | -40 to 85 | -55 to 125 | 0 to 70 |
| Package / Case | 8-MSOP | 8-MSOP | 8-MSOP | 8-MSOP | 8-HVSSOP |
| RoHS Status | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant |
| Moisture Sensitivity Level | 3 (168 Hours) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) |
Engineering Selection Recommendations
For Direct Functional Replacement (Matching Bandwidth and Slew Rate):
The AD8421ARMZ, AD8421ARMZ-R7, AD8421ARMZ-RL, AD8421TRMZ-EP, and AD8421TRMZ-EP-R7 provide equivalent 10 MHz gain bandwidth product and superior 35 V/µs slew rate performance. These parts maintain ROHS3 compliance and operate across the required temperature range. The AD8421TRMZ-EP and AD8421TRMZ-EP-R7 variants extend the operating temperature to -55°C to 125°C, matching the ISL28127FUZ temperature specification. All AD8421 variants deliver 65 mA output current, exceeding the ISL28127FUZ 45 mA specification. These parts are classified as Active with established inventory availability.
For Lower-Bandwidth, Lower-Power Applications:
The AD8221ARMZ, AD8221ARMZ-R7, and AD8221ARMZ-RL provide reduced bandwidth (825 kHz) and lower supply current (900 µA) compared to the ISL28127FUZ. These parts are suitable only for applications where the original 10 MHz bandwidth is not required. All AD8221 variants are Active and ROHS3 compliant with unlimited moisture sensitivity rating.
For High-Speed Applications Requiring Significantly Enhanced Performance:
The THS3001CDGN and THS3001HVCDGN deliver substantially higher performance with 6500 V/µs slew rate and 1.75 GHz gain bandwidth product. These parts are classified as Last Time Buy and operate at 0°C to 70°C, a narrower temperature range than the ISL28127FUZ. The THS3001 series is appropriate only for applications requiring performance significantly beyond the original specification.
Packaging and Compliance Considerations:
All substitute parts maintain ROHS3 compliance and surface mount configuration. The AD8421 series offers superior moisture sensitivity rating (MSL 1 Unlimited) compared to the ISL28127FUZ (MSL 3, 168 Hours), reducing handling and storage constraints. Packaging variants (Tube, Cut Tape & Digi-Reel, Tape & Reel) are available across the AD8421 series to accommodate different procurement and assembly workflows.
Frequently Asked Questions (FAQ)
Q: Can the AD8221 series directly replace the ISL28127FUZ?
A: The AD8221 series shares the 8-MSOP package and single-circuit configuration but operates at 825 kHz bandwidth compared to the ISL28127FUZ 10 MHz specification. Direct replacement is limited to applications where the lower bandwidth is acceptable. The AD8221 series provides lower supply current (900 µA versus 2.2 mA) and reduced output current (18 mA versus 45 mA).
Q: Which substitute part most closely matches the ISL28127FUZ performance?
A: The AD8421TRMZ-EP and AD8421TRMZ-EP-R7 provide the closest functional match, delivering 10 MHz gain bandwidth product and matching the -40°C to 125°C operating temperature range. These parts exceed the ISL28127FUZ slew rate (35 V/µs versus 3.6 V/µs) and output current (65 mA versus 45 mA) specifications.
Q: Are all substitute parts ROHS3 compliant?
A: Yes. All identified substitute parts—AD8221 series, AD8421 series, and THS3001 series—are ROHS3 compliant and REACH unaffected, matching the ISL28127FUZ compliance status.
Q: What is the difference between AD8421ARMZ and AD8421TRMZ-EP variants?
A: The AD8421ARMZ operates at -40°C to 85°C, while the AD8421TRMZ-EP extends the operating temperature to -55°C to 125°C. The AD8421TRMZ-EP variant matches the ISL28127FUZ temperature specification. Input offset voltage is 60 µV for AD8421ARMZ and 70 µV for AD8421TRMZ-EP.
Q: Can the THS3001 series replace the ISL28127FUZ in existing designs?
A: The THS3001 series represents a different amplifier topology (current feedback) with significantly higher performance specifications. Substitution requires circuit redesign to accommodate the substantially higher slew rate (6500 V/µs), bandwidth (420 MHz), and different input/output characteristics. The THS3001 series operates at 0°C to 70°C, a narrower temperature range than the ISL28127FUZ.
Q: What packaging options are available for the AD8421 series?
A: The AD8421 series is available in multiple packaging formats: Tube (AD8421ARMZ, AD8421TRMZ-EP), Cut Tape & Digi-Reel (AD8421ARMZ-R7, AD8421ARMZ-RL), and Tape & Reel (AD8421ARMZ-RL). Selection depends on procurement volume and assembly process requirements.
Q: How does the moisture sensitivity rating affect component handling?
A: The ISL28127FUZ carries MSL 3 (168 Hours), requiring controlled storage and handling within 168 hours of package opening. The AD8421 and AD8221 series carry MSL 1 (Unlimited), eliminating time-based storage constraints and reducing handling complexity during manufacturing and assembly.
Q: Are the AD8221 and AD8421 series pin-compatible with the ISL28127FUZ?
A: All parts share the 8-MSOP package configuration. Pin compatibility for functional replacement requires verification of specific pin assignments and circuit topology, as the AD8221 and AD8421 are instrumentation amplifiers rather than general-purpose amplifiers. Consult device datasheets for detailed pinout information.
Q: What is the inventory status of substitute parts?
A: AD8421TRMZ-EP-R7 has 3200 units in stock. AD8421ARMZ-R7 has 2486 units. AD8221ARMZ-R7 has 17200 units. All AD8421 and AD8221 variants are classified as Active. The THS3001 series carries Last Time Buy status with limited inventory (3200 units for THS3001CDGN, 969 units for THS3001HVCDGN).
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