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OP284ES Equivalent & Substitute Parts
Part Overview
The OP284ES 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 equivalent and substitute components for new designs or production continuity. The OP284ES operates across a wide supply voltage range of 3V to 36V and is suitable for applications requiring low input bias current and moderate bandwidth performance. Substitute parts are identified based on matching functional characteristics, package compatibility, and electrical parameter alignment within acceptable tolerances for general-purpose amplifier applications.
Substiute Parts
Key Parameters
| Parameter | Value | Unit |
|---|---|---|
| Amplifier Type | General Purpose | — |
| Number of Circuits | 2 | — |
| Output Type | Rail-to-Rail | — |
| Package / Case | 8-SOIC (0.154", 3.90mm Width) | — |
| Mounting Type | Surface Mount | — |
| Slew Rate | 4 | V/µs |
| Gain Bandwidth Product | 4.25 | MHz |
| Current - Input Bias | 80 | nA |
| Voltage - Input Offset | 100 | µV |
| Current - Output / Channel | 10 | mA |
| Voltage - Supply Span (Min) | 3 | V |
| Voltage - Supply Span (Max) | 36 | V |
| Operating Temperature | -40 to 125 | °C |
Substitute Part Grouping Explanation
Substitution of the OP284ES is determined by the following critical parameters: dual-channel configuration (2 circuits), rail-to-rail output capability, 8-SOIC package format, surface mount technology, and operating temperature range of -40°C to 125°C. All identified substitute parts maintain these core functional and physical characteristics.
Substitute parts are grouped into two categories:
Direct Equivalent: OP284ESZ maintains identical electrical specifications and differs only in packaging format (Tube vs. unspecified for OP284ES). This part is an active product from the same manufacturer and base product family.
Functional Equivalents: ADA4084-2ARZ, OPA2171AQDRQ1, OPA2172ID, and OPA2172IDR are functionally compatible alternatives that maintain the dual-channel, rail-to-rail, 8-SOIC configuration and operating temperature range. These parts exhibit variations in slew rate, gain bandwidth product, input bias current, input offset voltage, output current capability, and minimum supply voltage. Selection among functional equivalents depends on specific application requirements within the allowable parameter ranges.
Parameter Comparison
| Parameter | OP284ES | OP284ESZ | ADA4084-2ARZ | OPA2171AQDRQ1 | OPA2172ID | OPA2172IDR |
|---|---|---|---|---|---|---|
| Manufacturer | Analog Devices Inc. | Analog Devices Inc. | Analog Devices Inc. | Texas Instruments | Texas Instruments | Texas Instruments |
| Product Status | Obsolete | Active | Active | Active | Active | Active |
| Amplifier Type | General Purpose | General Purpose | General Purpose | General Purpose | General Purpose | General Purpose |
| Number of Circuits | 2 | 2 | 2 | 2 | 2 | 2 |
| Output Type | Rail-to-Rail | Rail-to-Rail | Rail-to-Rail | Rail-to-Rail | Rail-to-Rail | Rail-to-Rail |
| Package / Case | 8-SOIC (0.154", 3.90mm Width) | 8-SOIC (0.154", 3.90mm Width) | 8-SOIC (0.154", 3.90mm Width) | 8-SOIC (0.154", 3.90mm Width) | 8-SOIC (0.154", 3.90mm Width) | 8-SOIC (0.154", 3.90mm Width) |
| Mounting Type | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount |
| Slew Rate (V/µs) | 4 | 4 | 4.6 | 1.5 | 10 | 10 |
| Gain Bandwidth Product (MHz) | 4.25 | 4.25 | 15.9 | 3 | 10 | 10 |
| Current - Input Bias (nA) | 80 | 80 | 140 | 0.008 | 0.008 | 0.008 |
| Voltage - Input Offset (µV) | 100 | 100 | 30 | 250 | 200 | 200 |
| Current - Output / Channel (mA) | 10 | 10 | 30 | 35 | 75 | 75 |
| Voltage - Supply Span Min (V) | 3 | 3 | 3 | 2.7 | 4.5 | 4.5 |
| Voltage - Supply Span Max (V) | 36 | 36 | 30 | 36 | 36 | 36 |
| Operating Temperature (°C) | -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 |
Engineering Selection Recommendations
OP284ESZ is the primary direct equivalent for OP284ES replacement. This part is manufactured by Analog Devices Inc. under the same base product number (OP284) and maintains identical electrical specifications. OP284ESZ holds active product status and is ROHS3 compliant, making it suitable for new designs and production continuity. The primary difference is packaging format (Tube), which does not affect electrical performance or PCB-level compatibility.
ADA4084-2ARZ is an active Analog Devices product offering higher performance characteristics, including increased slew rate (4.6 V/µs vs. 4 V/µs), higher gain bandwidth product (15.9 MHz vs. 4.25 MHz), and improved input offset voltage (30 µV vs. 100 µV). This part is suitable for applications requiring enhanced bandwidth and precision. The maximum supply voltage is reduced to 30V, which must be verified against application requirements. ADA4084-2ARZ is ROHS3 compliant.
OPA2172ID and OPA2172IDR are Texas Instruments products with significantly higher performance specifications: slew rate of 10 V/µs, gain bandwidth product of 10 MHz, and output current capability of 75 mA per channel. These parts require a minimum supply voltage of 4.5V, which restricts use in applications requiring 3V operation. Both variants are ROHS3 compliant and differ only in packaging format (Tube vs. Cut Tape & Digi-Reel). OPA2172IDR offers higher inventory availability.
OPA2171AQDRQ1 is a Texas Instruments automotive-grade part (AEC-Q100 qualified) with the lowest slew rate (1.5 V/µs) and gain bandwidth product (3 MHz) among substitutes. This part features exceptionally low input bias current (8 pA) and operates at minimum supply voltage of 2.7V. The automotive qualification and MSL rating of 3 (168 Hours) indicate suitability for automotive and harsh environment applications. This part is ROHS3 compliant.
Selection among functional equivalents must account for application-specific requirements regarding bandwidth, slew rate, output current, supply voltage range, and environmental conditions. All substitute parts maintain the dual-channel, rail-to-rail, 8-SOIC configuration and -40°C to 125°C operating temperature range of the OP284ES.
Frequently Asked Questions (FAQ)
Q: Can OP284ESZ be used as a direct replacement for OP284ES?
A: Yes. OP284ESZ is the direct equivalent, maintaining identical electrical specifications and the same 8-SOIC package format. The only difference is packaging format (Tube). No circuit modifications are required.
Q: What are the key differences between OP284ES and the Texas Instruments OPA2172 series?
A: The OPA2172ID and OPA2172IDR offer superior performance with 10 V/µs slew rate and 10 MHz gain bandwidth product compared to OP284ES specifications of 4 V/µs and 4.25 MHz. However, OPA2172 parts require a minimum supply voltage of 4.5V, whereas OP284ES operates from 3V. Applications requiring 3V operation cannot use OPA2172 without circuit redesign.
Q: Is the ADA4084-2ARZ suitable for all OP284ES applications?
A: ADA4084-2ARZ is functionally compatible for most applications but has a reduced maximum supply voltage of 30V compared to OP284ES at 36V. Applications operating at supply voltages above 30V require OP284ESZ or OPA2172 series parts. ADA4084-2ARZ offers higher bandwidth and improved precision, making it suitable for demanding signal conditioning applications.
Q: What is the significance of the OPA2171AQDRQ1 automotive qualification?
A: OPA2171AQDRQ1 carries AEC-Q100 automotive qualification and MSL rating of 3 (168 Hours), indicating suitability for automotive, industrial, and harsh environment applications. This part is not a general substitute for consumer applications but is specifically selected when automotive-grade reliability and qualification are required.
Q: Can substitute parts be used interchangeably on existing PCBs designed for OP284ES?
A: All identified substitute parts use the 8-SOIC package with identical pinout and footprint compatibility. Direct PCB-level substitution is possible without layout modifications. However, electrical parameter differences (slew rate, bandwidth, output current, supply voltage range) must be verified against circuit design requirements before implementation.
Q: What packaging options are available for substitute parts?
A: OP284ESZ is supplied in Tube packaging. ADA4084-2ARZ is supplied in Tube. OPA2172ID is supplied in Tube. OPA2172IDR is supplied in Cut Tape (CT) & Digi-Reel format. OPA2171AQDRQ1 is supplied in Cut Tape (CT) & Digi-Reel format. Selection of packaging format depends on production volume and assembly process requirements.
Q: Are all substitute parts RoHS compliant?
A: Yes. All identified substitute parts (OP284ESZ, ADA4084-2ARZ, OPA2171AQDRQ1, OPA2172ID, OPA2172IDR) are ROHS3 compliant. The original OP284ES does not specify RoHS status due to its obsolete classification.
Q: Which substitute part offers the lowest input bias current?
A: OPA2172ID, OPA2172IDR, and OPA2171AQDRQ1 all feature input bias current of 8 pA, compared to OP284ES at 80 nA. These parts are suitable for high-impedance input applications where input bias current must be minimized.
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