OP293FS Equivalent & Substitute Parts

Part Overview

The OP293FS is a general-purpose operational amplifier manufactured by Analog Devices Inc., housed in an 8-SOIC surface-mount package. This device is classified as obsolete, indicating it is no longer in active production. The OP293FS features a single amplifier circuit with a slew rate of 0.015 V/µs and a gain bandwidth product of 35 kHz, designed for low-speed analog signal processing applications. Due to its obsolete status, identifying equivalent and substitute parts is necessary for design continuity, component sourcing, and long-term product support.

Key Parameters

Parameter	OP293FS Value
Manufacturer	Analog Devices Inc.
Category	Linear, Amplifiers
Amplifier Type	General Purpose
Number of Circuits	1
Slew Rate	0.015 V/µs
Gain Bandwidth Product	35 kHz
Current - Input Bias	20 nA
Voltage - Input Offset	250 µV
Current - Output / Channel	25 mA
Voltage - Supply Span (Min)	1.7 V
Voltage - Supply Span (Max)	36 V
Operating Temperature	-40°C ~ 125°C
Mounting Type	Surface Mount
Package / Case	8-SOIC (0.154", 3.90mm Width)
Product Status	Obsolete
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the OP293FS is determined by the following critical parameters: package type (8-SOIC), mounting method (surface mount), amplifier classification (general purpose), operating temperature range (-40°C ~ 125°C), supply voltage span (1.7 V to 36 V), and electrical characteristics including slew rate, gain bandwidth product, input bias current, and output current capability.

The substitute parts are grouped into two categories:

Direct Equivalent: OP293FSZ is an active variant of the same base product (OP293) with identical electrical specifications and packaging. This part maintains full compatibility with the original OP293FS design.

Functional Alternatives: Parts including LM258ADT, LM258DT, LM2904AYDT, LM2904DT, LM2904YDT, LM358ADT, LM358DT, MC33078DT, and MC33078YDT are general-purpose operational amplifiers in 8-SOIC packages. These alternatives differ in circuit count (2 circuits versus 1), slew rate, gain bandwidth product, and supply voltage requirements. Selection among these alternatives depends on specific application requirements and whether the additional circuit count and enhanced performance characteristics are compatible with the target design.

Parameter Comparison

Parameter	OP293FS	OP293FSZ	LM258ADT	LM258DT	LM2904AYDT	LM2904DT	LM2904YDT	LM358ADT	LM358DT	MC33078DT	MC33078YDT
Manufacturer	Analog Devices	Analog Devices	STMicroelectronics	STMicroelectronics	STMicroelectronics	Rohm Semiconductor	STMicroelectronics	STMicroelectronics	Rohm Semiconductor	STMicroelectronics	STMicroelectronics
Number of Circuits	1	1	2	2	2	2	2	2	2	2	2
Slew Rate (V/µs)	0.015	0.015	0.6	0.6	0.6	0.3	0.6	0.6	0.3	7	7
Gain Bandwidth Product (kHz)	35	35	1100	1100	1100	700	700	1100	800	15000	15000
Current - Input Bias (nA)	20	20	20	20	20	20	20	20	20	250	250
Voltage - Input Offset (µV)	250	250	1000	5000	1000	1000	2000	1000	1000	150	150
Current - Output / Channel (mA)	25	25	40	40	40	30	30	40	30	37	37
Voltage - Supply Span Min (V)	1.7	1.7	3	3	3	3	3	3	3	5	5
Voltage - Supply Span Max (V)	36	36	30	30	30	32	30	30	32	30	30
Operating Temperature (°C)	-40 ~ 125	-40 ~ 125	-40 ~ 105	-40 ~ 105	-40 ~ 125	-40 ~ 125	-40 ~ 125	0 ~ 70	-40 ~ 85	-40 ~ 105	-40 ~ 105
Package / Case	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC
Product Status	Obsolete	Active	Active	Active	Active	Not For New Designs	Active	Active	Obsolete	Active	Active
RoHS Status	Not specified	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Primary Recommendation: OP293FSZ

The OP293FSZ is the direct equivalent of the OP293FS, manufactured by Analog Devices Inc. This part maintains identical electrical specifications, package configuration, and operating characteristics. The OP293FSZ is currently in active production status with ROHS3 compliance and REACH unaffected designation, providing superior long-term availability and regulatory compliance compared to the obsolete OP293FS. This part is the preferred choice for direct replacement in existing designs.

Secondary Recommendations: LM2904AYDT and LM2904YDT

For applications requiring extended operating temperature range (-40°C ~ 125°C) and active product status, the LM2904AYDT (STMicroelectronics) and LM2904YDT (STMicroelectronics) are suitable alternatives. Both parts feature dual-circuit configurations with slew rates of 0.6 V/µs and gain bandwidth products of 1.1 MHz and 700 kHz respectively. The LM2904AYDT carries AEC-Q100 automotive qualification. These parts require design modification to accommodate the dual-circuit architecture and higher performance characteristics.

Alternative Consideration: LM258ADT

The LM258ADT (STMicroelectronics) provides a dual-circuit general-purpose amplifier with 1.1 MHz gain bandwidth product and AEC-Q100 automotive qualification. This part is suitable for applications where the additional circuit count and enhanced performance are compatible with design requirements. Operating temperature range is -40°C ~ 105°C.

High-Performance Alternative: MC33078DT and MC33078YDT

The MC33078DT and MC33078YDT (STMicroelectronics) are dual-circuit operational amplifiers with significantly enhanced performance characteristics: 7 V/µs slew rate and 15 MHz gain bandwidth product. These parts require minimum supply voltage of 5 V and are suitable only for applications where the higher performance specifications and dual-circuit configuration are required. Both parts carry AEC-Q100 automotive qualification and are in active production status.

Not Recommended: LM2904DT and LM358DT

The LM2904DT (Rohm Semiconductor) is classified as "Not For New Designs." The LM358DT (Rohm Semiconductor) is obsolete. These parts should not be selected for new designs or long-term applications.

Frequently Asked Questions (FAQ)

Q: Can OP293FSZ be used as a direct replacement for OP293FS?

A: Yes. The OP293FSZ is the direct equivalent of the OP293FS with identical electrical specifications, package type (8-SOIC), and operating characteristics. The primary difference is product status: OP293FSZ is active and ROHS3 compliant, while OP293FS is obsolete.

Q: Why do substitute parts like LM258ADT have two circuits instead of one?

A: The LM258ADT and similar alternatives are dual-circuit operational amplifiers. The OP293FS contains a single circuit. Designs using single-circuit parts can accommodate dual-circuit alternatives if only one circuit is utilized, leaving the second circuit unused. However, this approach results in higher component cost and board space utilization than necessary.

Q: What is the impact of different slew rates on substitution?

A: Slew rate determines the maximum rate of change of output voltage. The OP293FS has a slew rate of 0.015 V/µs, while alternatives such as LM258ADT have 0.6 V/µs. Higher slew rates enable faster signal processing but are not required for low-speed applications. Designs operating at frequencies well below the gain bandwidth product are not affected by slew rate differences.

Q: Are all substitute parts available in 8-SOIC packaging?

A: Yes. All substitute parts listed are available in 8-SOIC (0.154", 3.90mm Width) surface-mount packages, ensuring mechanical and electrical compatibility with existing PCB layouts.

Q: What is the significance of AEC-Q100 qualification?

A: AEC-Q100 is an automotive qualification standard. Parts carrying this designation (LM258ADT, LM2904AYDT, LM2904YDT, MC33078DT, MC33078YDT) meet automotive industry reliability and quality requirements. This qualification is relevant only for applications in automotive or similarly demanding environments.

Q: Can MC33078DT be used in place of OP293FS?

A: MC33078DT is functionally compatible from a package and mounting perspective but has significantly different electrical characteristics: 7 V/µs slew rate versus 0.015 V/µs, 15 MHz gain bandwidth product versus 35 kHz, and minimum supply voltage of 5 V versus 1.7 V. This part is suitable only for applications where the enhanced performance specifications are required and the design can accommodate the higher performance characteristics.

Q: What is the minimum supply voltage requirement for substitute parts?

A: The OP293FS operates with a minimum supply voltage of 1.7 V. Most substitute parts (LM258, LM2904, LM358 series) require a minimum of 3 V. The MC33078 series requires a minimum of 5 V. Design modifications may be necessary if the application operates at supply voltages below 3 V.

Q: Are all substitute parts ROHS3 compliant?

A: All active substitute parts listed are ROHS3 compliant. The OP293FS compliance status is not specified in the provided data. ROHS3 compliance is a regulatory requirement for products sold in the European Union and other regulated markets.

Q: What is the difference between LM2904AYDT and LM2904YDT?

A: Both parts are manufactured by STMicroelectronics with identical electrical specifications and operating temperature range (-40°C ~ 125°C). The LM2904AYDT carries AEC-Q100 automotive qualification, while LM2904YDT does not. Selection depends on whether automotive qualification is required for the application.

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