OP482GS-REEL Equivalent & Substitute Parts

Part Overview

The OP482GS-REEL is a J-FET operational amplifier integrated circuit manufactured by Analog Devices Inc., configured as a 4-circuit device in a 14-SOIC surface mount package. This component is classified as obsolete, indicating that direct procurement from the original manufacturer is no longer available through standard distribution channels. The OP482GS-REEL was designed for applications requiring low input bias current, low input offset voltage, and moderate bandwidth performance in a compact surface mount form factor. Identification of equivalent and substitute parts is necessary to maintain design continuity, support production requirements, and ensure long-term component availability for legacy and new system implementations.

Key Parameters

Parameter	Value	Unit
Amplifier Type	J-FET	—
Number of Circuits	4	—
Slew Rate	9	V/µs
Gain Bandwidth Product	4	MHz
Current - Input Bias	3	pA
Voltage - Input Offset	200	µV
Current - Supply (x4 Channels)	210	µA
Current - Output / Channel	10	mA
Voltage - Supply Span (Min)	9	V
Voltage - Supply Span (Max)	36	V
Operating Temperature	-40 to 85	°C
Package / Case	14-SOIC (0.154", 3.90mm Width)	—
Mounting Type	Surface Mount	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the OP482GS-REEL is determined by strict alignment of electrical and mechanical parameters within the J-FET operational amplifier category. The primary substitution criteria are:

Critical Matching Parameters:

Amplifier Type: J-FET (low input bias current architecture)
Number of Circuits: 4 (quad configuration)
Package / Case: 14-SOIC form factor (0.154", 3.90mm Width)
Mounting Type: Surface Mount
Gain Bandwidth Product: 4 MHz (primary performance specification)
Slew Rate: 9 V/µs (minimum acceptable rate for signal fidelity)
Current - Input Bias: 3 pA (ultra-low bias current requirement)
Voltage - Input Offset: 200 µV (precision offset specification)
Voltage - Supply Span: 9 V to 36 V (operating range compatibility)

Substitute parts are grouped into two categories: Direct Equivalents (identical electrical and mechanical specifications with different packaging or product status) and Functional Alternatives (compatible J-FET amplifiers with acceptable parameter variations within application tolerance).

Parameter Comparison

Part Number	Manufacturer	Amplifier Type	Circuits	Slew Rate (V/µs)	GBW (MHz)	Input Bias (pA)	Input Offset (µV)	Supply Current (µA)	Output Current (mA)	Supply Span (V)	Temp Range (°C)	Package	Product Status
OP482GS-REEL	Analog Devices	J-FET	4	9	4	3	200	210	10	9–36	-40 to 85	14-SOIC	Obsolete
OP482GSZ-REEL	Analog Devices	J-FET	4	9	4	3	200	210	10	9–36	-40 to 85	14-SOIC	Active
LF247DT	STMicroelectronics	J-FET	4	16	4	20	3000	1400	40	44–44	-40 to 105	14-SOIC	Active
LF347BD	Texas Instruments	J-FET	4	13	3	50	3000	8000	31	7–36	0 to 70	14-SOIC	Obsolete
LF347D	STMicroelectronics	J-FET	4	16	3	20	3000	1400	40	44–44	0 to 70	14-SOIC	Active
LF347DT	STMicroelectronics	J-FET	4	16	4	20	3000	1400	40	44–44	0 to 70	14-SOIC	Active
LF347M	onsemi	J-FET	4	13	4	50	5000	7200	—	7–36	0 to 70	14-SOIC	Obsolete
LF347M/NOPB	Texas Instruments	J-FET	4	13	4	50	5000	7200	—	10–36	0 to 70	14-SOIC	Active
LF347MX/NOPB	Texas Instruments	J-FET	4	13	4	50	5000	7200	—	10–36	0 to 70	14-SOIC	Active
LM3900D	Texas Instruments	General Purpose	4	20	2.5	30000	—	6200	10	4.4–32	0 to 70	14-SOIC	Last Time Buy
MC33174D	STMicroelectronics	General Purpose	4	2	2.1	100000	1000	220	27	4–44	-40 to 105	14-SOIC	Active

Engineering Selection Recommendations

Direct Equivalent (Recommended Primary Substitute):

The OP482GSZ-REEL is the direct equivalent of the OP482GS-REEL. This part maintains identical electrical specifications across all critical parameters: J-FET amplifier type, 4-circuit configuration, 9 V/µs slew rate, 4 MHz gain bandwidth product, 3 pA input bias current, 200 µV input offset voltage, and 9–36 V supply span. The OP482GSZ-REEL is manufactured by Analog Devices Inc. and carries Active product status, ensuring ongoing availability and manufacturing support. This part is ROHS3 compliant and REACH unaffected, meeting modern regulatory requirements. The packaging designation (Cut Tape & Digi-Reel) provides flexible procurement options. This substitution requires no circuit redesign or performance re-evaluation.

Secondary J-FET Alternatives (Functional Compatibility with Parameter Variations):

The LF347DT and LF347MX/NOPB are J-FET quad amplifiers with 4 MHz gain bandwidth product and 14-SOIC packaging. Both are manufactured by active suppliers (STMicroelectronics and Texas Instruments respectively) and carry ROHS3 compliance. These parts exhibit higher slew rates (16 V/µs and 13 V/µs respectively) and higher input bias currents (20 pA and 50 pA respectively) compared to the OP482GS-REEL. The LF347DT operates across a fixed 44 V supply span, while the LF347MX/NOPB supports 10–36 V. Both operate at reduced temperature ranges (0–70°C) relative to the original part. These alternatives are suitable for applications where the elevated input bias current and offset voltage do not compromise system performance.

General Purpose Alternatives (Limited Compatibility):

The LM3900D and MC33174D are general purpose amplifiers with 4-circuit configuration and 14-SOIC packaging. These parts differ fundamentally in amplifier architecture (general purpose rather than J-FET) and exhibit significantly higher input bias currents (30 nA and 100 nA respectively). These alternatives are appropriate only for applications where ultra-low input bias current is not a design requirement. The LM3900D carries Last Time Buy status, indicating limited future availability.

Obsolete Parts (Not Recommended for New Designs):

The LF347BD and LF347M are classified as obsolete and should not be selected for new production designs. These parts may be considered only for legacy system maintenance where existing inventory is available and supply chain continuity is established through alternative channels.

Frequently Asked Questions (FAQ)

Q: Can the OP482GSZ-REEL directly replace the OP482GS-REEL without circuit modification?

A: Yes. The OP482GSZ-REEL is electrically and mechanically identical to the OP482GS-REEL across all specified parameters. Both are 4-circuit J-FET amplifiers in 14-SOIC packages with identical slew rate, gain bandwidth product, input bias current, input offset voltage, and supply voltage range. The primary difference is product status (Active vs. Obsolete) and packaging format (Digi-Reel vs. standard reel). No circuit redesign is required.

Q: What are the key differences between the OP482GS-REEL and the LF347DT?

A: Both are J-FET quad amplifiers in 14-SOIC packages with 4 MHz gain bandwidth product. The LF347DT exhibits a higher slew rate (16 V/µs vs. 9 V/µs), higher input bias current (20 pA vs. 3 pA), and higher input offset voltage (3 mV vs. 200 µV). The LF347DT operates at a fixed 44 V supply span, whereas the OP482GS-REEL supports 9–36 V. The LF347DT is manufactured by STMicroelectronics and carries Active status. Substitution is appropriate for applications where the higher input bias current and offset voltage are acceptable.

Q: Why is the OP482GS-REEL classified as obsolete?

A: Obsolete classification indicates that the manufacturer (Analog Devices Inc.) has discontinued production and no longer accepts new orders through standard distribution channels. This status necessitates identification of equivalent or substitute parts to maintain design continuity and support ongoing production requirements. The OP482GSZ-REEL provides an active equivalent from the same manufacturer.

Q: Can I use the LM3900D as a substitute for the OP482GS-REEL?

A: The LM3900D is a general purpose amplifier, not a J-FET amplifier, and exhibits significantly higher input bias current (30 nA vs. 3 pA). Substitution is appropriate only for applications where ultra-low input bias current is not a critical design parameter. The LM3900D carries Last Time Buy status, indicating limited future availability. For new designs, the OP482GSZ-REEL or LF347DT are preferred alternatives.

Q: What is the significance of the 14-SOIC package specification?

A: The 14-SOIC (Small Outline Integrated Circuit) package is a surface mount form factor with 0.154 inches (3.90 mm) width. All substitute parts listed maintain this package specification, ensuring mechanical and electrical compatibility with existing printed circuit board layouts. Substitute parts with different package designations (such as 14-SO or 14-SOP) are functionally equivalent but may require PCB redesign or adapter solutions.

Q: Are all substitute parts ROHS3 compliant?

A: The OP482GSZ-REEL, LF247DT, LF347D, LF347DT, LF347M/NOPB, LF347MX/NOPB, LM3900D, and MC33174D are all ROHS3 compliant. The LF347BD and LF347M are also ROHS3 compliant. ROHS3 compliance indicates conformance to the Restriction of Hazardous Substances Directive and is required for many commercial and industrial applications. Verify compliance requirements for your specific application before component selection.

Q: What is the operating temperature range difference between the OP482GS-REEL and substitute parts?

A: The OP482GS-REEL operates from -40°C to 85°C. The LF247DT and MC33174D extend the upper temperature limit to 105°C. The LF347BD, LF347D, LF347DT, LF347M, LF347M/NOPB, LF347MX/NOPB, and LM3900D operate from 0°C to 70°C, representing a narrower temperature range. Verify that substitute part temperature specifications align with your application requirements before selection.

Q: What packaging options are available for substitute parts?

A: The OP482GSZ-REEL is available in Cut Tape (CT) & Digi-Reel format. The LF247DT, LF347DT, and LF347MX/NOPB are available in Cut Tape & Digi-Reel format. The LF347D and LF347M/NOPB are available in Tube packaging. The LF347BD and LM3900D are available in Tube packaging. The LF347M packaging is not specified. Packaging selection affects procurement flexibility, handling, and storage requirements. Verify packaging availability with your supplier before finalizing component selection.

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