OP184FSZ Equivalent & Substitute Parts

Part Overview

The OP184FSZ is a general-purpose operational amplifier manufactured by Analog Devices Inc., designed for rail-to-rail applications in a compact 8-SOIC surface mount package. This single-circuit amplifier operates across a wide supply voltage range of 3V to 36V and maintains active product status with 2744 units in current inventory. The OP184FSZ serves applications requiring low-power, general-purpose amplification with moderate bandwidth and slew rate characteristics. Substitute parts are identified for applications where alternative manufacturers' components, enhanced performance specifications, or different circuit configurations meet system requirements while maintaining package and functional compatibility.

Key Parameters

Parameter	OP184FSZ
Manufacturer	Analog Devices Inc.
Amplifier Type	General Purpose
Number of Circuits	1
Output Type	Rail-to-Rail
Package / Case	8-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
Slew Rate	4V/µs
Gain Bandwidth Product	4.25 MHz
Current - Input Bias	80 nA
Voltage - Input Offset	175 µV
Current - Supply	2.25 mA
Current - Output / Channel	10 mA
Voltage - Supply Span (Min)	3 V
Voltage - Supply Span (Max)	36 V
Operating Temperature	-40°C ~ 125°C
Product Status	Active
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the OP184FSZ are categorized based on the following substitution criteria:

Primary Substitution Criteria:

Package compatibility: 8-SOIC surface mount form factor
Output type: Rail-to-rail configuration
Operating temperature range: -40°C to 125°C or compatible subset
Supply voltage compatibility: Minimum 3V operation
RoHS3 compliance and MSL rating

Substitution Categories:

Category 1: Direct Single-Circuit General-Purpose Substitutes Parts maintaining single-circuit configuration with general-purpose amplifier topology. These include ADA4084-1ARZ and LM7301 variants (LM7301IM/NOPB, LM7301IMX/NOPB). These parts share identical circuit count and package specifications with the OP184FSZ.

Category 2: Dual-Circuit CMOS Alternatives Parts featuring dual-circuit CMOS amplifier architecture (OPA2338UA/2K5, TLC2272AQD). These parts provide two independent amplifier circuits within the same 8-SOIC package footprint, suitable for applications where dual-channel functionality is beneficial or where single-channel operation is acceptable with one circuit unused.

Key Parameters Determining Substitution:

Package / Case: 8-SOIC (0.154", 3.90mm Width)
Mounting Type: Surface Mount
Output Type: Rail-to-Rail
RoHS Status: ROHS3 Compliant
Moisture Sensitivity Level: 1 or 2
Operating Temperature Range: -40°C minimum, 125°C maximum or compatible subset

Parameter Comparison

Parameter	OP184FSZ	ADA4084-1ARZ	LM7301IM/NOPB	LM7301IMX/NOPB	OPA2338UA/2K5	TLC2272AQD
Manufacturer	Analog Devices	Analog Devices	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments
Amplifier Type	General Purpose	General Purpose	General Purpose	General Purpose	CMOS	CMOS
Number of Circuits	1	1	1	1	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	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Slew Rate (V/µs)	4	4.6	1.25	1.25	4.6	3.6
Gain Bandwidth Product (MHz)	4.25	15.9	4	4	12.5	2.25
Current - Input Bias (nA)	80	140	103	103	0.0002	0.001
Voltage - Input Offset (µV)	175	40	40	40	500	300
Current - Supply (mA)	2.25	0.625	0.72	0.72	0.525 (x2)	2.4 (x2)
Current - Output / Channel (mA)	10	30	N/A	N/A	9	50
Voltage - Supply Span (Min)	3 V	3 V	1.8 V	1.8 V	2.7 V	4.4 V
Voltage - Supply Span (Max)	36 V	30 V	32 V	32 V	5.5 V	16 V
Operating Temperature	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 125°C
Product Status	Active	Active	Obsolete	Active	Active	Obsolete
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1	1	1	1	2	1

Engineering Selection Recommendations

Active Product Status Substitutes:

For applications requiring direct replacement with active product status and single-circuit configuration, the ADA4084-1ARZ from Analog Devices Inc. provides equivalent functionality with enhanced performance characteristics. This part maintains the same manufacturer lineage as the OP184FSZ, identical operating temperature range (-40°C to 125°C), and MSL rating of 1. The ADA4084-1ARZ operates within a reduced maximum supply voltage of 30V compared to the OP184FSZ's 36V maximum, which is suitable for most standard applications.

The LM7301IMX/NOPB from Texas Instruments offers active product status with identical circuit count and package specifications. This part operates at a reduced maximum temperature of 85°C and features a lower maximum supply voltage of 32V. The LM7301IMX/NOPB is available in Tape & Reel packaging with 9339 units in inventory, providing high availability for production applications.

Dual-Circuit CMOS Alternatives:

The OPA2338UA/2K5 from Texas Instruments provides dual-circuit CMOS amplification within the 8-SOIC package. This part maintains active product status, operates across -40°C to 85°C, and features extremely low input bias current (0.2 pA). The OPA2338UA/2K5 operates at reduced supply voltages (2.7V to 5.5V maximum) and is suitable for low-voltage applications where the OP184FSZ's 36V maximum supply capability is not required.

Obsolete Product Considerations:

The LM7301IM/NOPB and TLC2272AQD carry obsolete product status. While inventory is available (1280 and 869 units respectively), these parts should be selected only when existing designs require compatibility or when long-term supply agreements are established. The LM7301IM/NOPB operates at reduced maximum temperature (85°C) compared to the OP184FSZ. The TLC2272AQD includes AEC-Q100 automotive qualification and operates across the full -40°C to 125°C temperature range but features a higher minimum supply voltage of 4.4V.

Compliance and Certification:

All substitute parts maintain ROHS3 compliance and REACH unaffected status, matching the OP184FSZ regulatory profile. Moisture sensitivity levels range from 1 (unlimited) to 2 (1 year), with the OP184FSZ and most substitutes rated at MSL 1. The TLC2272AQD includes automotive-grade qualification (AEC-Q100), suitable for automotive applications requiring enhanced reliability screening.

Frequently Asked Questions (FAQ)

Q: Can the ADA4084-1ARZ directly replace the OP184FSZ in all applications?

A: The ADA4084-1ARZ is functionally compatible as a direct replacement in applications where the maximum supply voltage requirement does not exceed 30V. The OP184FSZ supports up to 36V, while the ADA4084-1ARZ maximum is 30V. Both parts share identical 8-SOIC packaging, rail-to-rail output configuration, and -40°C to 125°C operating temperature range. Verify your circuit's maximum supply voltage before substitution.

Q: What is the difference between single-circuit and dual-circuit substitutes?

A: The OP184FSZ contains one independent amplifier circuit. Dual-circuit substitutes (OPA2338UA/2K5, TLC2272AQD) contain two independent amplifier circuits within the same 8-SOIC package. In single-channel applications, one circuit remains unused. Dual-circuit parts are suitable when two amplification stages are required or when space constraints favor integrated dual-channel solutions.

Q: Why do some substitutes have lower maximum operating temperatures?

A: The LM7301 variants and OPA2338UA/2K5 operate to 85°C maximum, compared to the OP184FSZ's 125°C maximum. These parts are suitable for applications with operating temperature requirements up to 85°C. Applications requiring full -40°C to 125°C operation must use the OP184FSZ, ADA4084-1ARZ, or TLC2272AQD.

Q: Are all substitute parts available in the same packaging options?

A: All substitute parts are available in 8-SOIC surface mount packages matching the OP184FSZ footprint. Packaging format differs: the OP184FSZ is supplied in Tube, while LM7301IMX/NOPB and OPA2338UA/2K5 are supplied in Tape & Reel format. TLC2272AQD packaging format is not specified in available data. Verify packaging requirements for your assembly process.

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

A: Moisture Sensitivity Level indicates the component's sensitivity to moisture absorption during storage and handling. MSL 1 (unlimited) parts have no moisture-related storage restrictions. MSL 2 (1 year) parts require storage in controlled humidity environments and have a one-year shelf life from the date of manufacture. The OP184FSZ and most substitutes are MSL 1. The OPA2338UA/2K5 is MSL 2, requiring more stringent storage conditions.

Q: Can I use the TLC2272AQD in automotive applications?

A: The TLC2272AQD carries AEC-Q100 automotive qualification, indicating it meets automotive industry reliability and screening standards. However, the TLC2272AQD is obsolete. For new automotive designs, use active-status parts such as the ADA4084-1ARZ or LM7301IMX/NOPB, verifying automotive qualification status with the manufacturer if required.

Q: What are the key electrical differences between the OP184FSZ and ADA4084-1ARZ?

A: The ADA4084-1ARZ provides superior performance in several parameters: slew rate of 4.6V/µs (versus 4V/µs), gain bandwidth product of 15.9 MHz (versus 4.25 MHz), and input offset voltage of 40µV (versus 175µV). The ADA4084-1ARZ draws lower supply current (625µA versus 2.25mA) and provides higher output current capability (30mA versus 10mA). These enhancements make the ADA4084-1ARZ suitable for higher-speed applications and lower-power designs.

Q: Is the LM7301IMX/NOPB suitable for high-voltage applications?

A: The LM7301IMX/NOPB operates at a maximum supply voltage of 32V, compared to the OP184FSZ's 36V maximum. For applications requiring operation above 32V, the OP184FSZ or ADA4084-1ARZ (30V maximum) are more appropriate. The LM7301IMX/NOPB is suitable for standard industrial and consumer applications operating within 32V supply limits.

Q: What inventory levels are available for each substitute part?

A: Current inventory levels are: OP184FSZ (2744 units), ADA4084-1ARZ (1306 units), LM7301IM/NOPB (1280 units), LM7301IMX/NOPB (9339 units), OPA2338UA/2K5 (6672 units), and TLC2272AQD (869 units). The LM7301IMX/NOPB offers the highest availability. Verify current inventory status with your supplier before finalizing component selection for production quantities.

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