OP484FS Equivalent & Substitute Parts

Part Overview

The OP484FS is a general-purpose operational amplifier integrated circuit manufactured by Analog Devices Inc., configured as a 4-circuit rail-to-rail amplifier in a 14-SOIC surface mount package. This device is classified as obsolete, indicating that direct replacements from the original manufacturer are necessary for new designs and production applications. The OP484FS operates across a wide supply voltage range of 3V to 36V with an operating temperature range of -40°C to 125°C, making it suitable for industrial and extended-temperature applications. Identifying equivalent and substitute parts ensures design continuity, maintains performance specifications, and provides access to active product lines with improved availability.

Key Parameters

Parameter	Value	Unit
Amplifier Type	General Purpose	—
Number of Circuits	4	—
Output Type	Rail-to-Rail	—
Slew Rate	4	V/µs
Gain Bandwidth Product	4.25	MHz
Current - Input Bias	80	nA
Voltage - Input Offset	250	µV
Current - Output / Channel	10	mA
Voltage - Supply Span (Min)	3	V
Voltage - Supply Span (Max)	36	V
Operating Temperature	-40 to 125	°C
Mounting Type	Surface Mount	—
Package / Case	14-SOIC (0.154", 3.90mm Width)	—

Substitute Part Grouping Explanation

Substitute parts for the OP484FS are classified into two categories based on electrical and mechanical compatibility:

Direct Package Equivalent (14-SOIC Package): The OP484FSZ maintains identical electrical specifications and package form factor, differing only in product status (active versus obsolete) and packaging format (tube). This part provides a direct replacement path with no design modifications required.

Functional Equivalents with Package Variation: The ADA4084-4ARUZ, LT1496 series (CS, HS, IS variants), and OPA4171AQDRQ1 provide functional substitution with enhanced or alternative electrical characteristics. These parts operate as 4-circuit general-purpose rail-to-rail amplifiers but may require evaluation of the following parameters:

Supply voltage range compatibility
Slew rate and gain bandwidth product performance
Input bias current and offset voltage specifications
Output current capability
Operating temperature range
Package form factor (14-TSSOP, 14-SO, or 14-SOIC)
Product status and compliance certifications

Substitution is valid when the target application requirements fall within the electrical specifications of the substitute part and the package footprint is compatible with the printed circuit board design.

Parameter Comparison

Parameter	OP484FS	OP484FSZ	ADA4084-4ARUZ	LT1496CS#PBF	LT1496HS#PBF	LT1496IS#PBF	OPA4171AQDRQ1
Manufacturer	Analog Devices	Analog Devices	Analog Devices	Analog Devices	Analog Devices	Analog Devices	Texas Instruments
Product Status	Obsolete	Active	Active	Active	Active	Active	Active
Amplifier Type	General Purpose	General Purpose	General Purpose	General Purpose	General Purpose	General Purpose	General Purpose
Number of Circuits	4	4	4	4	4	4	4
Output Type	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail
Slew Rate (V/µs)	4	4	4.6	0.001	0.001	0.001	1.5
Gain Bandwidth Product (MHz)	4.25	4.25	15.9	0.0027	0.0027	0.0027	3
Current - Input Bias (nA)	80	80	0.14	0.00025	0.00025	0.00025	0.000008
Voltage - Input Offset (µV)	250	250	60	200	200	200	250
Current - Output / Channel (mA)	10	10	30	1.5	1.5	1.5	35
Voltage - Supply Span Min (V)	3	3	3	2.2	2.2	2.2	4.5
Voltage - Supply Span Max (V)	36	36	30	36	36	36	36
Operating Temperature (°C)	-40 to 125	-40 to 125	-40 to 125	0 to 70	-40 to 125	-40 to 85	-40 to 125
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Package / Case	14-SOIC	14-SOIC	14-TSSOP	14-SOIC	14-SOIC	14-SOIC	14-SOIC
RoHS Status	—	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	3 (168 Hours)	3 (168 Hours)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	3 (168 Hours)

Engineering Selection Recommendations

OP484FSZ is the primary direct replacement for the OP484FS. This part maintains identical electrical specifications and 14-SOIC package compatibility while offering active product status and ROHS3 compliance. Selection of OP484FSZ eliminates design modifications and provides the shortest qualification path for applications currently using OP484FS.

LT1496HS#PBF and LT1496HS#TRPBF provide functional equivalence with extended operating temperature range (-40°C to 125°C) matching the OP484FS. These parts are suitable for applications requiring ultra-low power consumption and extended temperature operation. The LT1496 series exhibits significantly lower slew rate and gain bandwidth product, requiring evaluation for time-critical signal processing applications.

ADA4084-4ARUZ offers enhanced performance characteristics including higher slew rate (4.6V/µs), higher gain bandwidth product (15.9MHz), and superior input bias current (0.14nA). This part is packaged in 14-TSSOP form factor, requiring PCB layout modifications. The maximum supply voltage is limited to 30V compared to 36V for the OP484FS. ADA4084-4ARUZ is suitable for applications requiring improved dynamic performance and lower input bias current.

OPA4171AQDRQ1 is a Texas Instruments alternative offering automotive-grade qualification (AEC-Q100) and ROHS3 compliance. This part features superior input bias current (8pA) and higher output current capability (35mA per channel). The minimum supply voltage requirement of 4.5V restricts use in applications requiring 3V operation. OPA4171AQDRQ1 is appropriate for automotive and industrial applications requiring third-source qualification.

LT1496CS#PBF, LT1496IS#PBF, and variants provide substitution for applications with relaxed operating temperature requirements (0°C to 70°C or -40°C to 85°C). These parts are not suitable for the full -40°C to 125°C temperature range of the OP484FS.

Frequently Asked Questions (FAQ)

Q: Can OP484FSZ be used as a direct replacement for OP484FS without circuit modifications?

A: Yes. OP484FSZ maintains identical electrical specifications and 14-SOIC package form factor. The only differences are product status (active versus obsolete) and packaging format (tube). No circuit modifications are required.

Q: What is the primary limitation when substituting ADA4084-4ARUZ for OP484FS?

A: The ADA4084-4ARUZ is packaged in 14-TSSOP form factor rather than 14-SOIC, requiring PCB layout modifications. Additionally, the maximum supply voltage is 30V compared to 36V for the OP484FS, restricting use in applications requiring higher supply voltages.

Q: Are LT1496 series parts suitable replacements for all OP484FS applications?

A: LT1496 series parts provide functional substitution but exhibit significantly different performance characteristics. The slew rate is 0.001V/µs (compared to 4V/µs) and gain bandwidth product is 2.7kHz (compared to 4.25MHz). These parts are suitable only for low-frequency, low-power applications. Temperature range variants (CS, HS, IS) must be selected to match the required operating temperature.

Q: What compliance certifications should be considered when selecting a substitute?

A: All active substitute parts listed are ROHS3 compliant and REACH unaffected. OPA4171AQDRQ1 includes automotive-grade qualification (AEC-Q100), making it suitable for automotive applications. Moisture sensitivity level varies between parts; ADA4084-4ARUZ and LT1496 series offer MSL 1 (unlimited), while OP484FSZ and OPA4171AQDRQ1 are MSL 3 (168 hours).

Q: Can OPA4171AQDRQ1 operate at 3V supply voltage?

A: No. OPA4171AQDRQ1 requires a minimum supply voltage of 4.5V, making it unsuitable for applications requiring 3V operation. OP484FSZ, ADA4084-4ARUZ, and LT1496 series parts support 3V minimum supply voltage.

Q: What is the difference between LT1496HS#PBF and LT1496IS#PBF?

A: Both parts are functionally identical with identical electrical specifications. The primary difference is operating temperature range: LT1496HS#PBF operates from -40°C to 125°C, while LT1496IS#PBF operates from -40°C to 85°C. Selection depends on the required temperature range for the application.

Q: Are packaging format variants (Tube, Tape & Reel) interchangeable?

A: Packaging format variants (Tube, Tape & Reel, Cut Tape) contain identical die and electrical specifications. The format affects handling, storage, and automated assembly compatibility. Selection depends on manufacturing process requirements and inventory management practices.

Q: Which substitute part offers the lowest input bias current?

A: OPA4171AQDRQ1 offers the lowest input bias current at 8pA, followed by ADA4084-4ARUZ at 0.14nA. LT1496 series parts offer 0.25pA input bias current. OP484FS and OP484FSZ specify 80nA input bias current. Selection depends on application sensitivity to input bias current effects.

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