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ISL28290FBZ Equivalent & Substitute Parts
Part Overview
The ISL28290FBZ is a voltage feedback amplifier manufactured by Renesas Electronics Corporation, configured as a dual-circuit (2-channel) rail-to-rail operational amplifier in an 8-SOIC surface mount package. This device is classified as obsolete, indicating that direct replacement with active production alternatives is necessary for new designs and ongoing procurement requirements. The ISL28290FBZ operates across a 3V to 5.5V supply range with a slew rate of 50V/µs and -3dB bandwidth of 170 MHz, making it suitable for moderate-speed signal conditioning applications.
Substiute Parts
Key Parameters
| Parameter | Value | Unit |
|---|---|---|
| Manufacturer | Renesas Electronics Corporation | — |
| Part Number | ISL28290FBZ | — |
| Product Status | Obsolete | — |
| Amplifier Type | Voltage Feedback | — |
| Number of Circuits | 2 | — |
| Output Type | Rail-to-Rail | — |
| Package / Case | 8-SOIC (0.154", 3.90mm Width) | — |
| Mounting Type | Surface Mount | — |
| Slew Rate | 50 | V/µs |
| -3dB Bandwidth | 170 | MHz |
| Current - Input Bias | 10 | µA |
| Voltage - Input Offset | 240 | µV |
| Current - Supply (x2 Channels) | 8.5 | mA |
| Current - Output / Channel | 144 | mA |
| Voltage - Supply Span (Min) | 3 | V |
| Voltage - Supply Span (Max) | 5.5 | V |
| Operating Temperature | -40 to 125 | °C |
| RoHS Status | ROHS3 Compliant | — |
| Moisture Sensitivity Level (MSL) | 3 (168 Hours) | — |
Substitute Part Grouping Explanation
Substitution of the ISL28290FBZ is determined by the following critical parameters:
Primary Substitution Criteria:
- Amplifier Type: Voltage Feedback (primary function)
- Number of Circuits: 2 (dual-channel configuration)
- Output Type: Rail-to-Rail (output swing capability)
- Package / Case: 8-SOIC form factor (physical compatibility)
- Mounting Type: Surface Mount (assembly compatibility)
- Voltage - Supply Span: Minimum 3V to Maximum 5.5V (power supply compatibility)
- Operating Temperature: -40°C to 125°C (thermal operating range)
Secondary Performance Parameters:
- Slew Rate: 50V/µs (signal transition speed)
- -3dB Bandwidth: 170 MHz (frequency response)
- Current - Output / Channel: 144 mA (load driving capability)
- Current - Supply: 8.5mA (power consumption per dual channels)
Substitute parts must maintain compatibility across all primary criteria. Secondary parameters may vary within acceptable application-dependent tolerances. Parts that deviate significantly in slew rate, bandwidth, or output current capability are grouped separately to indicate performance trade-offs.
Parameter Comparison
| Parameter | ISL28290FBZ | OPA2836ID | OPA2836IDR | OPA2835ID | OPA2835IDR | NCV20032DR2G | NCS20032DR2G |
|---|---|---|---|---|---|---|---|
| Manufacturer | Renesas | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | onsemi | onsemi |
| Product Status | Obsolete | Active | Active | Active | Active | Active | Active |
| Amplifier Type | Voltage Feedback | Voltage Feedback | Voltage Feedback | Voltage Feedback | Voltage Feedback | General Purpose | General Purpose |
| Number of Circuits | 2 | 2 | 2 | 2 | 2 | 2 | 2 |
| Output Type | Rail-to-Rail | Differential, Rail-to-Rail | Differential, Rail-to-Rail | Differential, Rail-to-Rail | Differential, Rail-to-Rail | Rail-to-Rail | Rail-to-Rail |
| Package / Case | 8-SOIC (0.154", 3.90mm) | 8-SOIC (0.154", 3.90mm) | 8-SOIC (0.154", 3.90mm) | 8-SOIC (0.154", 3.90mm) | 8-SOIC (0.154", 3.90mm) | 8-SOIC (0.154", 3.90mm) | 8-SOIC (0.154", 3.90mm) |
| Mounting Type | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount |
| Slew Rate (V/µs) | 50 | 560 | 560 | 160 | 160 | 8 | 8 |
| -3dB Bandwidth (MHz) | 170 | 205 | 205 | 3.1 | 3.1 | — | — |
| Current - Input Bias (µA) | 10 | 0.00065 | 0.00065 | 0.0002 | 0.0002 | 0.000001 | 0.000001 |
| Voltage - Input Offset (µV) | 240 | 65 | 65 | 100 | 100 | 500 | 500 |
| Current - Supply (mA, x2 Channels) | 8.5 | 1 | 1 | 0.25 | 0.25 | 0.275 | 0.275 |
| Current - Output / Channel (mA) | 144 | 50 | 50 | 40 | 40 | 14 | 96 |
| Voltage - Supply Span (Min, V) | 3 | 2.5 | 2.5 | 2.5 | 2.5 | 1.7 | 1.7 |
| Voltage - Supply Span (Max, V) | 5.5 | 5.5 | 5.5 | 5.5 | 5.5 | 5.5 | 5.5 |
| Operating Temperature (°C) | -40 to 125 | -40 to 125 | -40 to 125 | -40 to 125 | -40 to 125 | -40 to 125 | -40 to 125 |
| RoHS Status | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant |
| MSL | 3 (168 Hours) | 2 (1 Year) | 2 (1 Year) | 2 (1 Year) | 2 (1 Year) | 1 (Unlimited) | 1 (Unlimited) |
Engineering Selection Recommendations
Tier 1 - Direct Voltage Feedback Substitutes (Highest Compatibility):
The OPA2836ID and OPA2836IDR (Texas Instruments) represent the most direct functional replacements for the ISL28290FBZ. Both devices maintain voltage feedback amplifier topology, dual-circuit configuration, rail-to-rail output, identical 8-SOIC package geometry, and matching -40°C to 125°C operating temperature range. These parts are in active production status, ensuring long-term availability. The OPA2836 series exhibits superior performance characteristics with 560V/µs slew rate and 205 MHz bandwidth, exceeding the ISL28290FBZ specifications. Output current capability (50 mA per channel) is lower than the original part (144 mA), requiring circuit evaluation for high-load applications. Both variants are ROHS3 compliant with MSL rating of 2 (1 Year), providing improved moisture handling compared to the original MSL 3 rating.
The OPA2835ID and OPA2835IDR (Texas Instruments) provide an alternative voltage feedback solution with reduced performance specifications (160V/µs slew rate, 3.1 MHz bandwidth) but lower supply current consumption (250µA total). These devices are suitable for applications where the ISL28290FBZ bandwidth and slew rate exceed system requirements.
Tier 2 - General Purpose Amplifier Substitutes (Functional Compatibility with Trade-offs):
The NCV20032DR2G and NCS20032DR2G (onsemi) are general purpose amplifiers that maintain dual-circuit configuration, rail-to-rail output, identical 8-SOIC package, and -40°C to 125°C operating temperature. These devices feature significantly lower supply current (275µA total) and reduced input bias current (1 pA), but provide only 8V/µs slew rate and 7 MHz bandwidth. The NCS20032DR2G offers superior output current capability (96 mA per channel) compared to NCV20032DR2G (14 mA per channel). Both variants are ROHS3 compliant with MSL 1 (Unlimited), providing optimal moisture resistance. General purpose topology may require circuit redesign for applications dependent on voltage feedback characteristics.
Compliance and Certification Status:
All substitute parts listed maintain ROHS3 compliance and REACH unaffected status, matching the original device regulatory requirements. MSL ratings for Texas Instruments OPA series (MSL 2) and onsemi NCV/NCS series (MSL 1) provide improved moisture sensitivity performance compared to the original ISL28290FBZ (MSL 3), reducing handling and storage risk during manufacturing.
Frequently Asked Questions (FAQ)
Q: Can the OPA2836ID directly replace the ISL28290FBZ without circuit modification?
A: The OPA2836ID maintains identical package geometry (8-SOIC), supply voltage range (3V to 5.5V maximum), and operating temperature range (-40°C to 125°C). However, the OPA2836ID output current per channel (50 mA) is lower than the ISL28290FBZ (144 mA). Applications requiring the full 144 mA output current per channel must be evaluated for compatibility. The superior slew rate (560V/µs vs. 50V/µs) and bandwidth (205 MHz vs. 170 MHz) of the OPA2836ID provide performance margin in most signal conditioning applications.
Q: What is the difference between OPA2836ID and OPA2836IDR?
A: Both devices are identical in electrical specifications and performance characteristics. The primary difference is packaging format: OPA2836ID is supplied in Tube packaging, while OPA2836IDR is supplied in Cut Tape (CT) & Digi-Reel® format. Selection depends on assembly line requirements and inventory management preferences.
Q: Why do the onsemi NCV20032DR2G and NCS20032DR2G have different output current ratings despite identical part numbers?
A: The NCV20032DR2G provides 14 mA output current per channel, while the NCS20032DR2G provides 96 mA output current per channel. These represent different device variants within the NCV/NCS product family. The NCS20032DR2G is the preferred substitute when output current capability approaches or exceeds 50 mA per channel.
Q: Is the ISL28290FBZ package footprint compatible with OPA2836 series packages?
A: Yes. Both the ISL28290FBZ and OPA2836 series use 8-SOIC package with 0.154" (3.90mm) width. PCB footprints are mechanically compatible. Pin assignments must be verified against device datasheets to ensure functional compatibility in the target circuit.
Q: What is the impact of switching from voltage feedback to general purpose amplifier topology?
A: Voltage feedback amplifiers (ISL28290FBZ, OPA2836ID) are optimized for closed-loop stability and predictable gain characteristics. General purpose amplifiers (NCV20032DR2G, NCS20032DR2G) provide broader application flexibility but may require different compensation networks and feedback resistor selection. Applications using the ISL28290FBZ in precision gain configurations should maintain voltage feedback topology for design consistency.
Q: Are all substitute parts ROHS3 compliant?
A: Yes. All substitute parts listed (OPA2836ID, OPA2836IDR, OPA2835ID, OPA2835IDR, NCV20032DR2G, NCS20032DR2G) are ROHS3 compliant and REACH unaffected, matching the regulatory status of the original ISL28290FBZ.
Q: What is the significance of MSL (Moisture Sensitivity Level) differences?
A: The ISL28290FBZ carries MSL 3 (168 Hours), indicating moisture sensitivity requiring controlled storage and handling. Substitute parts with MSL 1 (onsemi devices) or MSL 2 (Texas Instruments devices) provide improved moisture tolerance, reducing risk of solder joint degradation and component failure during manufacturing processes with extended exposure to humid environments.
Q: Can the OPA2835ID be used as a lower-cost alternative to OPA2836ID?
A: The OPA2835ID provides reduced performance specifications (160V/µs slew rate, 3.1 MHz bandwidth, 40 mA output current per channel) compared to OPA2836ID (560V/µs, 205 MHz, 50 mA). Cost reduction is offset by bandwidth and slew rate limitations. Selection depends on application frequency response requirements. Applications operating below 3.1 MHz may benefit from OPA2835ID lower supply current consumption (250µA total vs. 1mA for OPA2836ID).
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