OP184FS-REEL Equivalent & Substitute Parts

Part Overview

The OP184FS-REEL is a general-purpose operational amplifier manufactured by Analog Devices Inc., housed in an 8-SOIC surface-mount package. This device features rail-to-rail output capability, making it suitable for low-voltage and single-supply applications. The OP184FS-REEL is classified as obsolete, indicating that direct procurement from primary sources may be limited. Identifying equivalent and substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and support ongoing production requirements for systems utilizing this amplifier topology.

Key Parameters

Parameter	Value	Unit
Amplifier Type	General Purpose	—
Number of Circuits	1	—
Output Type	Rail-to-Rail	—
Slew Rate	4	V/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 to 125	°C
Package / Case	8-SOIC (0.154", 3.90mm Width)	—
Mounting Type	Surface Mount	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the OP184FS-REEL is determined by electrical and mechanical compatibility across the following critical parameters:

Primary Substitution Criteria:

Package type: 8-SOIC surface-mount form factor
Amplifier classification: General-purpose operational amplifier
Output configuration: Rail-to-rail capability
Supply voltage range: Minimum 3 V to maximum 36 V overlap
Operating temperature range: -40°C to 125°C coverage
Single-circuit configuration

Secondary Compatibility Factors:

Slew rate: 4 V/µs or greater
Gain bandwidth product: 4.25 MHz or greater
Input bias current: 80 nA or lower
Input offset voltage: 175 µV or lower
Output current capability: 10 mA or greater per channel
Supply current: 2.25 mA or lower

Substitute parts are grouped into two categories: Direct Equivalents (identical electrical specifications and active product status) and Functional Alternatives (compatible electrical performance with differing specifications or product status).

Parameter Comparison

Parameter	OP184FS-REEL	OP184FSZ-REEL	ADA4084-1ARZ-RL	HA9P5127-5Z	LM7301IM/NOPB	LM7301IMX/NOPB
Manufacturer	Analog Devices	Analog Devices	Analog Devices	Renesas Electronics	Texas Instruments	Texas Instruments
Product Status	Obsolete	Active	Active	Active	Obsolete	Active
Amplifier Type	General Purpose	General Purpose	General Purpose	General Purpose	General Purpose	General Purpose
Number of Circuits	1	1	1	1	1	1
Output Type	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	—	Rail-to-Rail	Rail-to-Rail
Slew Rate (V/µs)	4	4	4.6	10	1.25	1.25
Gain Bandwidth Product (MHz)	4.25	4.25	15.9	8.5	4	4
Current - Input Bias (nA)	80	80	140	15	103	103
Voltage - Input Offset (µV)	175	175	40	30	40	40
Current - Supply (mA)	2.25	2.25	0.625	3.5	0.72	0.72
Current - Output / Channel (mA)	10	10	30	25	—	—
Voltage - Supply Span Min (V)	3	3	3	10	1.8	1.8
Voltage - Supply Span Max (V)	36	36	30	30	32	32
Operating Temperature (°C)	-40 to 125	-40 to 125	-40 to 125	0 to 75	-40 to 85	-40 to 85
Package / Case	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC
RoHS Status	—	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Direct Equivalent (Recommended Primary Substitute):

OP184FSZ-REEL is the direct equivalent to OP184FS-REEL. This part maintains identical electrical specifications across all measured parameters, including slew rate, gain bandwidth product, input bias current, input offset voltage, supply current, and output current capability. The OP184FSZ-REEL is classified as active product status with ROHS3 compliance and REACH unaffected certification. The primary distinction is packaging format: OP184FSZ-REEL is supplied in Cut Tape and Digi-Reel format with significantly higher inventory availability (18,900 units versus 1,919 units). This substitute provides seamless design compatibility with no circuit modifications required.

Active Product Alternatives:

LM7301IMX/NOPB (Texas Instruments) is an active-status alternative offering rail-to-rail output in 8-SOIC packaging. This part operates across a supply voltage range of 1.8 V to 32 V, providing extended low-voltage capability. The LM7301IMX/NOPB exhibits lower slew rate (1.25 V/µs) and gain bandwidth product (4 MHz) compared to the OP184FS-REEL, with reduced supply current (0.72 mA). Operating temperature range is -40°C to 85°C, which does not extend to the 125°C maximum of the original part. This substitute is suitable for applications where extended low-voltage operation is required and maximum operating temperature does not exceed 85°C. ROHS3 compliance and REACH unaffected status are confirmed.

ADA4084-1ARZ-RL (Analog Devices) provides enhanced performance characteristics with higher slew rate (4.6 V/µs), significantly higher gain bandwidth product (15.9 MHz), and improved input offset voltage (40 µV). Output current capability is increased to 30 mA per channel. Supply voltage range is 3 V to 30 V, with operating temperature -40°C to 125°C. This part is suitable for applications requiring higher bandwidth and output current. ROHS3 compliance and REACH unaffected status are confirmed.

HA9P5127-5Z (Renesas Electronics) offers superior slew rate (10 V/µs) and gain bandwidth product (8.5 MHz) with excellent input bias current (15 nA) and input offset voltage (30 µV). Supply voltage range is 10 V to 30 V, with operating temperature 0°C to 75°C. This part is not suitable for applications requiring operation below 10 V supply or above 75°C. ROHS3 compliance and REACH unaffected status are confirmed.

Obsolete Product Alternatives:

LM7301IM/NOPB (Texas Instruments) is classified as obsolete. While it provides rail-to-rail output and 8-SOIC packaging, its use is not recommended for new designs due to discontinued product status.

Frequently Asked Questions (FAQ)

Q: Can OP184FSZ-REEL be used as a direct replacement for OP184FS-REEL?

A: Yes. OP184FSZ-REEL is electrically and mechanically identical to OP184FS-REEL. Both parts share the same base product number (OP184), identical electrical specifications, and 8-SOIC package. The primary difference is packaging format and inventory availability. No circuit modifications are required.

Q: What is the key difference between OP184FS-REEL and LM7301IMX/NOPB?

A: Both parts are general-purpose rail-to-rail operational amplifiers in 8-SOIC packaging. The LM7301IMX/NOPB has lower slew rate (1.25 V/µs versus 4 V/µs), lower gain bandwidth product (4 MHz versus 4.25 MHz), and reduced supply current (0.72 mA versus 2.25 mA). The LM7301IMX/NOPB operates at lower supply voltages (1.8 V minimum) but has a reduced maximum operating temperature (85°C versus 125°C). Selection depends on application requirements for bandwidth, slew rate, and temperature range.

Q: Is HA9P5127-5Z suitable for all applications using OP184FS-REEL?

A: No. While HA9P5127-5Z offers superior slew rate and bandwidth, it has a minimum supply voltage of 10 V, which exceeds the OP184FS-REEL minimum of 3 V. Additionally, the maximum operating temperature is 75°C, which does not meet the 125°C specification of the original part. HA9P5127-5Z is suitable only for applications with supply voltages of 10 V or greater and operating temperatures not exceeding 75°C.

Q: What does "rail-to-rail" output mean in the context of these amplifiers?

A: Rail-to-rail output capability means the operational amplifier can swing its output voltage to within a small margin of both the positive and negative supply rails. This characteristic is important for low-voltage applications and single-supply designs where maximum output voltage swing is required.

Q: Are all substitute parts RoHS3 compliant?

A: OP184FSZ-REEL, ADA4084-1ARZ-RL, HA9P5127-5Z, LM7301IM/NOPB, and LM7301IMX/NOPB are all confirmed ROHS3 compliant. The original OP184FS-REEL does not have RoHS status specified in the provided data.

Q: Can ADA4084-1ARZ-RL be used in place of OP184FS-REEL in existing designs?

A: ADA4084-1ARZ-RL is functionally compatible with OP184FS-REEL in terms of package and basic operational characteristics. However, it has different electrical specifications: higher slew rate (4.6 V/µs), significantly higher gain bandwidth product (15.9 MHz), lower input offset voltage (40 µV), and higher output current (30 mA). The maximum supply voltage is reduced to 30 V. These differences may affect circuit behavior, particularly in applications sensitive to bandwidth or slew rate. Circuit verification is necessary before substitution.

Q: What is the significance of the 8-SOIC package specification?

A: The 8-SOIC (Small Outline Integrated Circuit) package is a surface-mount form factor with 8 pins, measuring 0.154 inches (3.90 mm) in width. All substitute parts listed use this identical package, ensuring mechanical and pin-compatible installation on printed circuit boards designed for the OP184FS-REEL.

Q: Why is OP184FS-REEL classified as obsolete?

A: Obsolete classification indicates that the manufacturer has discontinued production and support for this part number. While existing inventory may be available through distributors, long-term supply cannot be guaranteed. Identifying active-status alternatives ensures design continuity and supply chain reliability for ongoing production.

Q: What is the difference between OP184FS-REEL and OP184FSZ-REEL packaging?

A: OP184FS-REEL is supplied in standard reel format, while OP184FSZ-REEL is supplied in Cut Tape and Digi-Reel format. Both are surface-mount 8-SOIC packages with identical electrical specifications. The packaging difference affects handling and tape configuration but does not impact electrical performance or circuit compatibility.

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