ISL28233FBZ Equivalent & Substitute Parts

Part Overview

The ISL28233FBZ is a zero-drift operational amplifier manufactured by Renesas Electronics Corporation, designed for precision analog signal conditioning applications. This 2-circuit rail-to-rail amplifier operates across a 1.8V to 6V supply range with exceptionally low input offset voltage of 2 µV and minimal input bias current of 180 pA. The device is housed in an 8-SOIC surface mount package and maintains active product status with full RoHS3 compliance.

Substitute parts are identified when equivalent electrical performance can be achieved within the specified parameter tolerances while maintaining mechanical compatibility and operational reliability across the -40°C to 125°C temperature range.

Substiute Parts

ISL28233FBZ

Renesas Electronics CorporationIn Stock: 1752ISL28233FBZ Datasheet

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OPA2313ID

Texas InstrumentsIn Stock: 10524OPA2313ID Datasheet

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OPA2313IDR

Texas InstrumentsIn Stock: 1631OPA2313IDR Datasheet

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OPA2314AID

Texas InstrumentsIn Stock: 2465OPA2314AID Datasheet

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OPA2314AIDR

Texas InstrumentsIn Stock: 22052OPA2314AIDR Datasheet

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TSZ122IDT

STMicroelectronicsIn Stock: 2164TSZ122IDT Datasheet

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TSZ122IYDT

STMicroelectronicsIn Stock: 3000404TSZ122IYDT Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the ISL28233FBZ are classified into two functional categories based on amplifier type and electrical performance characteristics:

Category 1: Zero-Drift Amplifiers Parts TSZ122IDT and TSZ122IYDT (STMicroelectronics) maintain the zero-drift amplifier topology with comparable input offset voltage (1 µV) and gain bandwidth product (400 kHz). These substitutes operate within the same supply voltage range (1.8V to 5.5V) and share identical package geometry (8-SOIC). The TSZ122 series includes automotive-grade qualification (AEC-Q100) and unlimited moisture sensitivity rating, matching the MSL-1 classification of the ISL28233FBZ.

Category 2: General Purpose and CMOS Amplifiers Parts OPA2313ID, OPA2313IDR (Texas Instruments) and OPA2314AID, OPA2314AIDR (Texas Instruments) provide alternative topologies with enhanced bandwidth performance (1 MHz and 3 MHz respectively). These devices maintain rail-to-rail output, 2-circuit configuration, and 8-SOIC packaging. The OPA2313 series operates at 1.8V to 5.5V supply range, while OPA2314 series supports the same range with higher slew rate capability.

Substitution Criteria:

• Identical package type: 8-SOIC surface mount
• Matching circuit count: 2 independent amplifiers
• Rail-to-rail output capability
• Operating temperature range: -40°C to 125°C minimum
• Supply voltage overlap: minimum 1.8V to 5.5V
• Active product status
• RoHS3 compliance

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement with Identical Performance Characteristics:

The TSZ122IDT and TSZ122IYDT (STMicroelectronics) are the closest functional equivalents to the ISL28233FBZ. Both devices maintain zero-drift amplifier topology with input offset voltage of 1 µV (superior to the 2 µV specification of the ISL28233FBZ) and identical 400 kHz gain bandwidth product. The TSZ122 series operates within the overlapping supply range of 1.8V to 5.5V and shares the 8-SOIC package footprint. Both parts carry RoHS3 compliance and MSL-1 moisture sensitivity rating. The TSZ122IYDT variant offers significantly higher inventory availability (3,000,300 units) compared to TSZ122IDT (2,100 units). Both TSZ122 variants include automotive-grade qualification per AEC-Q100, providing additional reliability assurance for demanding applications.

For Applications Requiring Enhanced Bandwidth:

The OPA2313ID and OPA2313IDR (Texas Instruments) provide general-purpose amplifier topology with 1 MHz gain bandwidth product, representing a 2.5× improvement over the ISL28233FBZ. These devices maintain rail-to-rail output, 2-circuit configuration, and 8-SOIC packaging with identical operating temperature range. The OPA2313 series operates at 1.8V to 5.5V supply range. Input offset voltage increases to 500 µV, and input bias current reduces to 0.2 pA. The OPA2313IDR variant is supplied in Tape & Reel packaging with 1,532 units in stock, while OPA2313ID is supplied in Tube packaging with 10,463 units available.

For Applications Requiring Maximum Slew Rate and Bandwidth:

The OPA2314AID and OPA2314AIDR (Texas Instruments) offer CMOS amplifier topology with 3 MHz gain bandwidth product and 1.5 V/µs slew rate, providing 7.5× bandwidth improvement and 7.5× slew rate improvement over the ISL28233FBZ. These devices maintain identical package geometry, circuit count, and operating temperature specifications. Supply current increases to 150 µA per dual-channel configuration. The OPA2314AIDR variant in Cut Tape & Digi-Reel packaging offers the highest inventory availability (21,966 units), while OPA2314AID in Tube packaging provides 2,400 units.

Compliance and Certification Status:

All substitute parts maintain active product status and RoHS3 compliance. The TSZ122 series includes automotive-grade qualification (AEC-Q100), suitable for automotive and industrial applications requiring enhanced reliability documentation. The OPA2313 and OPA2314 series carry standard industrial-grade certification. All parts are REACH unaffected and classified under ECCN EAR99 with identical HTSUS code 8542.33.0001.

Frequently Asked Questions (FAQ)

Q: Can the TSZ122 series directly replace the ISL28233FBZ in existing PCB designs?

A: Yes. The TSZ122IDT and TSZ122IYDT share identical 8-SOIC package geometry (0.154" width, 3.90mm), pinout compatibility, and operating temperature range (-40°C to 125°C). Both devices are zero-drift amplifiers with comparable input offset voltage (1 µV vs. 2 µV) and identical 400 kHz gain bandwidth product. The maximum supply voltage specification differs (5.5V vs. 6V), requiring verification that your application does not exceed 5.5V supply levels.

Q: What is the primary difference between zero-drift amplifiers (TSZ122) and general-purpose amplifiers (OPA2313)?

A: Zero-drift amplifiers (TSZ122) employ chopper-stabilization or auto-zeroing techniques to achieve extremely low input offset voltage (1 µV) and are optimized for precision DC measurement applications. General-purpose amplifiers (OPA2313) sacrifice offset voltage performance (500 µV) to achieve higher bandwidth (1 MHz vs. 400 kHz) and lower input bias current (0.2 pA vs. 70 pA), making them suitable for AC signal conditioning and higher-frequency applications.

Q: Is the OPA2314 series suitable as a substitute for the ISL28233FBZ?

A: The OPA2314 series provides mechanical and functional compatibility (8-SOIC package, 2 circuits, rail-to-rail output, -40°C to 125°C operation) but represents a different amplifier class (CMOS vs. zero-drift). The OPA2314 offers superior bandwidth (3 MHz) and slew rate (1.5 V/µs) at the cost of higher input offset voltage (500 µV) and increased supply current (150 µA). Selection depends on whether your application prioritizes precision DC performance or AC signal bandwidth.

Q: What packaging options are available for substitute parts?

A: The TSZ122IDT and OPA2313IDR are supplied in Cut Tape & Digi-Reel or Tape & Reel packaging, suitable for automated assembly. The TSZ122IYDT, OPA2313ID, OPA2314AID are supplied in Tube packaging, suitable for manual assembly or lower-volume production. The OPA2314AIDR is supplied in Cut Tape & Digi-Reel packaging. All variants use identical 8-SOIC surface mount package geometry.

Q: How does supply current consumption compare across substitute options?

A: The ISL28233FBZ consumes 18 µA per dual-channel configuration. The TSZ122 series consumes 31 µA (1.7× higher), the OPA2313 series consumes 50 µA (2.8× higher), and the OPA2314 series consumes 150 µA (8.3× higher). For battery-powered or ultra-low-power applications, the TSZ122 series provides the closest match to the ISL28233FBZ power consumption profile.

Q: Are the substitute parts suitable for automotive applications?

A: The TSZ122IDT and TSZ122IYDT include automotive-grade qualification per AEC-Q100, making them suitable for automotive and industrial applications requiring enhanced reliability documentation. The OPA2313 and OPA2314 series carry standard industrial-grade certification without automotive qualification. Application requirements should determine whether automotive-grade certification is necessary.

Q: What is the moisture sensitivity level difference between the ISL28233FBZ and substitute parts?

A: The ISL28233FBZ and both TSZ122 variants carry MSL-1 (Unlimited) moisture sensitivity rating, indicating no moisture sensitivity restrictions during storage or handling. The OPA2313 and OPA2314 series carry MSL-2 (1 Year) rating, requiring moisture control during storage and a maximum of 1 year shelf life before reflow soldering. For applications with extended storage periods or high-humidity environments, the MSL-1 rated parts (ISL28233FBZ and TSZ122 series) are preferred.

Q: Can I use the OPA2313 or OPA2314 if my application requires 6V supply operation?

A: No. The OPA2313 and OPA2314 series specify a maximum supply voltage of 5.5V, while the ISL28233FBZ supports up to 6V. If your application requires 6V supply operation, the TSZ122 series (5.5V maximum) also does not support this requirement. In this case, the ISL28233FBZ remains the only suitable option among the listed parts.