OP284FS Equivalent & Substitute Parts

Part Overview

The OP284FS is a general-purpose operational amplifier manufactured by Analog Devices Inc., configured as a dual-channel (2 circuit) rail-to-rail output device in an 8-SOIC surface mount package. This part is classified as obsolete, which necessitates identification of active equivalent and substitute components for new designs and production continuity. The OP284FS operates across a wide supply voltage range of 3V to 36V and maintains performance across the industrial temperature range of -40°C to 125°C. Substitution is required for applications requiring active product status, improved availability, or enhanced electrical performance characteristics.

Substiute Parts

OP284FS

Analog Devices Inc.In Stock: 3171OP284FS Datasheet

Current PartRFQ

OP284FSZ

Analog Devices Inc.In Stock: 26377OP284FSZ Datasheet

DirectRFQ

ADA4084-2ARZ

Analog Devices Inc.In Stock: 1480ADA4084-2ARZ Datasheet

SimilarRFQ

NCV33272ADR2G

onsemiIn Stock: 31368NCV33272ADR2G Datasheet

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OPA2171AQDRQ1

Texas InstrumentsIn Stock: 5513OPA2171AQDRQ1 Datasheet

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OPA2172ID

Texas InstrumentsIn Stock: 2158OPA2172ID Datasheet

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OPA2172IDR

Texas InstrumentsIn Stock: 17413OPA2172IDR Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the OP284FS is determined by strict adherence to the following electrical and mechanical parameters:

Primary Substitution Criteria:

• Package / Case: 8-SOIC (0.154", 3.90mm Width) — mandatory for PCB compatibility
• Mounting Type: Surface Mount — required for assembly process compatibility
• Number of Circuits: 2 — functional requirement for dual-channel operation
• Amplifier Type: General Purpose — application category match
• Operating Temperature Range: -40°C to 125°C — environmental specification match
• Voltage - Supply Span: Minimum 3V, Maximum 36V — power supply compatibility

Secondary Electrical Parameters for Compatibility Assessment:

• Output Type: Rail-to-Rail — preferred for signal swing optimization
• Slew Rate: 4V/µs or greater — performance threshold
• Gain Bandwidth Product: 4.25 MHz or greater — frequency response capability
• Current - Input Bias: 80 nA or lower — input impedance consideration
• Voltage - Input Offset: 175 µV or lower — DC accuracy requirement
• Current - Output / Channel: 10 mA or greater — load drive capability

Substitute parts are classified into two categories: direct equivalents (identical electrical specifications and packaging) and functional equivalents (compatible package and operating parameters with enhanced or alternative electrical characteristics).

Parameter Comparison

Engineering Selection Recommendations

Direct Equivalent (Recommended Primary Substitute):

The OP284FSZ is the direct equivalent of the OP284FS, manufactured by Analog Devices Inc. This part maintains identical electrical specifications including slew rate (4V/µs), gain bandwidth product (4.25 MHz), input bias current (80 nA), input offset voltage (175 µV), and output current per channel (10 mA). The OP284FSZ is currently in active production status with significantly higher inventory availability (26,339 units) compared to the obsolete OP284FS. The primary distinction is packaging format: OP284FSZ is supplied in tube packaging versus the original part's unspecified packaging. Both parts share identical 8-SOIC package geometry, surface mount mounting type, and operating temperature range. The OP284FSZ carries ROHS3 compliance certification, meeting modern regulatory requirements.

Functional Equivalents with Enhanced Performance:

The ADA4084-2ARZ (Analog Devices Inc.) provides enhanced electrical performance with higher slew rate (4.6V/µs), significantly improved gain bandwidth product (15.9 MHz), superior input offset voltage (30 µV), and increased output current per channel (30 mA). This part maintains rail-to-rail output configuration and 8-SOIC packaging. The maximum supply voltage is reduced to 30V (versus 36V for OP284FS), which may limit applicability in high-voltage designs. ADA4084-2ARZ is active production status with ROHS3 compliance.

The OPA2172IDR and OPA2172ID (Texas Instruments) offer substantially higher slew rate (10V/µs), improved gain bandwidth product (10 MHz), and significantly higher output current per channel (75 mA). These parts require minimum supply voltage of 4.5V (versus 3V for OP284FS), restricting use in low-voltage applications. Both maintain rail-to-rail output and 8-SOIC packaging with active production status and ROHS3 compliance. OPA2172IDR is supplied in cut tape and digi-reel format with higher inventory (17,400 units).

The OPA2171AQDRQ1 (Texas Instruments) is qualified to AEC-Q100 automotive standard with extremely low input bias current (8 pA). This part features lower slew rate (1.5V/µs) and gain bandwidth product (3 MHz) compared to OP284FS, making it unsuitable for applications requiring the original part's frequency response. Minimum supply voltage is 2.7V, enabling operation in lower-voltage systems. MSL rating is 3 (168 hours), requiring controlled storage conditions.

The NCV33272ADR2G (onsemi) is qualified to AEC-Q100 automotive standard with highest slew rate (10V/µs) and gain bandwidth product (24 MHz) among all substitutes. Output type specification is not provided. This part exhibits higher input bias current (300 nA) and higher supply current consumption (2.15mA per channel pair). NCV33272ADR2G maintains 3V to 36V supply range compatibility and 8-SOIC packaging.

Selection Criteria by Application:

For direct replacement in existing designs with no performance enhancement requirement, OP284FSZ is the appropriate selection due to identical electrical specifications and active production status.

For applications requiring improved frequency response and output drive capability within the 4.5V to 36V supply range, OPA2172IDR or OPA2172ID provide superior performance with high inventory availability.

For applications requiring automotive qualification and AEC-Q100 compliance, OPA2171AQDRQ1 or NCV33272ADR2G are appropriate selections, with NCV33272ADR2G offering superior frequency response characteristics.

For applications requiring operation below 4.5V supply voltage with direct electrical equivalence, OP284FSZ remains the only viable option.

Frequently Asked Questions (FAQ)

Q: Can OP284FSZ be used as a direct replacement for OP284FS without circuit modification?

A: Yes. The OP284FSZ maintains identical electrical specifications across all critical parameters: slew rate (4V/µs), gain bandwidth product (4.25 MHz), input bias current (80 nA), input offset voltage (175 µV), output current per channel (10 mA), and supply voltage range (3V to 36V). Both parts use identical 8-SOIC package geometry and surface mount mounting. No circuit modification is required.

Q: What is the primary limitation of OPA2172IDR compared to OP284FS?

A: The OPA2172IDR requires a minimum supply voltage of 4.5V, whereas OP284FS operates from 3V minimum. Applications requiring operation at 3V or 4V supply voltage cannot use OPA2172IDR without circuit redesign. All other electrical parameters are compatible or superior.

Q: Why does NCV33272ADR2G have higher input bias current (300 nA) than OP284FS (80 nA)?

A: Input bias current is a fundamental characteristic of the amplifier's input stage design. The NCV33272ADR2G is optimized for automotive applications with AEC-Q100 qualification, which may prioritize other performance characteristics such as slew rate (10V/µs) and gain bandwidth product (24 MHz) over input bias current minimization.

Q: Is the 8-SOIC package identical across all substitute parts?

A: Yes. All substitute parts listed use the 8-SOIC package with 0.154" (3.90mm) width specification. PCB footprints are mechanically compatible. Surface mount assembly processes require no modification.

Q: What does MSL (Moisture Sensitivity Level) rating mean for component handling?

A: MSL rating indicates the maximum time a component can be exposed to ambient conditions (typically 30°C, 85% relative humidity) before requiring baking. OP284FS and OP284FSZ have MSL 1 (unlimited exposure). OPA2172ID and OPA2172IDR have MSL 2 (1 year maximum). OPA2171AQDRQ1 has MSL 3 (168 hours maximum), requiring more stringent storage and handling controls.

Q: Can OPA2171AQDRQ1 be used in non-automotive applications?

A: Yes. AEC-Q100 qualification is a superset of standard industrial requirements. OPA2171AQDRQ1 meets or exceeds all industrial specifications. However, the lower gain bandwidth product (3 MHz) and slew rate (1.5V/µs) compared to OP284FS may limit suitability for applications requiring the original part's frequency response characteristics.

Q: What is the inventory status difference between OP284FS and its substitutes?

A: OP284FS is obsolete with 3,089 units in stock. OP284FSZ (direct equivalent) has 26,339 units available. OPA2172IDR has 17,400 units. NCV33272ADR2G has 31,300 units. ADA4084-2ARZ has 1,406 units. OPA2172ID has 2,083 units. OPA2171AQDRQ1 has 5,500 units. Substitutes with active production status offer superior long-term availability.

Q: Does ROHS3 compliance affect electrical performance?

A: No. ROHS3 compliance is a regulatory requirement addressing hazardous substance restrictions. It does not alter electrical performance characteristics. All active substitute parts listed carry ROHS3 compliance certification, meeting modern environmental and regulatory standards.

Q: Which substitute offers the best overall performance improvement?

A: NCV33272ADR2G provides the highest slew rate (10V/µs) and gain bandwidth product (24 MHz), representing the most significant performance enhancement. OPA2172IDR and OPA2172ID offer comparable frequency response (10 MHz) with substantially higher output current per channel (75 mA). Selection depends on specific application requirements for frequency response, output drive capability, and supply voltage range.