OP482GS Equivalent & Substitute Parts

Part Overview

The OP482GS 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 may be limited. The OP482GS is designed for applications requiring low input bias current, low input offset voltage, and moderate bandwidth performance in dual-supply configurations. Identification of equivalent and substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and support long-term product availability for systems utilizing this amplifier topology.

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
Mounting Type	Surface Mount	—
Package / Case	14-SOIC (0.154", 3.90mm Width)	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the OP482GS is determined by alignment of critical electrical and mechanical parameters. The primary substitution criteria are:

Mandatory Alignment Parameters:

Amplifier Type: J-FET topology
Number of Circuits: 4-circuit configuration
Package / Case: 14-SOIC form factor with 0.154" (3.90mm) width
Mounting Type: Surface Mount
Moisture Sensitivity Level: MSL 1 (Unlimited)

Performance Compatibility Parameters:

Slew Rate: 9 V/µs or greater
Gain Bandwidth Product: 4 MHz or greater
Current - Input Bias: 3 pA to 50 pA range
Voltage - Input Offset: 200 µV to 5 mV range
Voltage - Supply Span: Minimum 9 V to 10 V; Maximum 36 V or greater
Operating Temperature: Minimum -40°C or higher; Maximum 85°C or higher
Current - Output / Channel: 10 mA or greater

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

Parameter Comparison

Part Number	Manufacturer	Product Status	Slew Rate (V/µs)	GBW (MHz)	Input Bias (pA)	Input Offset (µV)	Supply Min (V)	Supply Max (V)	Temp Range (°C)	Output Current (mA)	Package
OP482GS	Analog Devices Inc.	Obsolete	9	4	3	200	9	36	-40 to 85	10	14-SOIC
OP482GSZ	Analog Devices Inc.	Active	9	4	3	200	9	36	-40 to 85	10	14-SOIC
LF247DT	STMicroelectronics	Active	16	4	20	3000	44	44	-40 to 105	40	14-SOIC
LF347D	STMicroelectronics	Active	16	3	20	3000	44	44	0 to 70	40	14-SOIC
LF347DT	STMicroelectronics	Active	16	4	20	3000	44	44	0 to 70	40	14-SOIC
LF347M	onsemi	Obsolete	13	4	50	5000	7	36	0 to 70	Not Specified	14-SOIC
LF347M/NOPB	Texas Instruments	Active	13	4	50	5000	10	36	0 to 70	Not Specified	14-SOIC
LF347MX/NOPB	Texas Instruments	Active	13	4	50	5000	10	36	0 to 70	Not Specified	14-SOIC
LMV822Q1MMX/NOPB	Texas Instruments	Active	2	5.6	40000	1000	2.5	5.5	-40 to 125	45	8-VSSOP
LMV824Q1MA/NOPB	Texas Instruments	Active	1.4	5.6	40000	1000	2.5	5.5	-40 to 125	45	14-SOIC
MC34074DR2G	onsemi	Active	13	4.5	100	1000	3	44	0 to 70	30	14-SOIC

Engineering Selection Recommendations

Direct Equivalent (Recommended Primary Substitute):

The OP482GSZ is the direct equivalent of the OP482GS. This part maintains identical electrical specifications across all measured parameters: 9 V/µs slew rate, 4 MHz gain bandwidth product, 3 pA input bias current, and 200 µV input offset voltage. The OP482GSZ is manufactured by Analog Devices Inc. and carries Active product status, ensuring ongoing availability and supply chain support. The OP482GSZ is packaged in Tube format and is ROHS3 Compliant with REACH Unaffected status, meeting modern regulatory requirements. This substitution requires no circuit redesign or performance validation.

Secondary Substitutes (J-FET Topology, Active Status):

The LF247DT and LF347DT manufactured by STMicroelectronics are J-FET 4-circuit amplifiers in 14-SOIC packages with Active product status. These devices offer enhanced slew rate performance (16 V/µs) and higher output current capability (40 mA per channel) compared to the OP482GS. However, these parts exhibit higher input bias current (20 pA versus 3 pA) and significantly higher input offset voltage (3 mV versus 200 µV). The LF247DT and LF347DT operate with fixed supply voltage of 44 V, differing from the OP482GS variable supply range of 9 V to 36 V. These substitutes are suitable for applications where enhanced slew rate and output current are beneficial and where the relaxed input bias and offset specifications are acceptable.

The LF347M/NOPB and LF347MX/NOPB manufactured by Texas Instruments are J-FET 4-circuit amplifiers in 14-SOIC packages with Active product status. These devices provide 13 V/µs slew rate and 4 MHz gain bandwidth product. Input bias current is specified at 50 pA and input offset voltage at 5 mV, representing relaxed specifications relative to the OP482GS. Supply voltage range is 10 V to 36 V. These parts are suitable for applications where the OP482GS specifications are not critical and where Texas Instruments supply chain preference exists.

The MC34074DR2G manufactured by onsemi is a general-purpose 4-circuit amplifier in 14-SOIC package with Active product status. This device provides 13 V/µs slew rate, 4.5 MHz gain bandwidth product, and 30 mA output current per channel. Input bias current is 100 nA and input offset voltage is 1 mV. Supply voltage range is 3 V to 44 V. This part is suitable for applications where general-purpose amplifier performance is acceptable and where the J-FET input bias current specification is not a design requirement.

Not Recommended:

The LMV822Q1MMX/NOPB and LMV824Q1MA/NOPB are general-purpose amplifiers with rail-to-rail output stages and automotive qualification. These devices are fundamentally different in topology (not J-FET) and operating characteristics, and are not suitable substitutes for the OP482GS in applications requiring J-FET input stage performance.

Frequently Asked Questions (FAQ)

Q: Can the OP482GSZ be used as a direct replacement for the OP482GS without circuit modification?

A: Yes. The OP482GSZ is electrically and mechanically identical to the OP482GS. All electrical parameters, package dimensions, and pin configurations are equivalent. No circuit redesign or performance validation is required. The primary difference is product status: OP482GSZ is Active, ensuring continued availability.

Q: What is the key difference between the OP482GS and the LF247DT?

A: Both are J-FET 4-circuit amplifiers in 14-SOIC packages. The LF247DT offers higher slew rate (16 V/µs versus 9 V/µs) and greater output current (40 mA versus 10 mA per channel). However, the LF247DT has higher input bias current (20 pA versus 3 pA) and significantly higher input offset voltage (3 mV versus 200 µV). The LF247DT operates at fixed 44 V supply, while the OP482GS accepts 9 V to 36 V. Substitution is appropriate only if the application can tolerate the relaxed input specifications and fixed supply voltage.

Q: Are the LF347M/NOPB and LF347MX/NOPB interchangeable?

A: The LF347M/NOPB and LF347MX/NOPB are functionally equivalent J-FET 4-circuit amplifiers with identical electrical specifications. The primary difference is packaging: LF347M/NOPB is supplied in Tube format, while LF347MX/NOPB is supplied in Cut Tape (CT) & Digi-Reel® format. Both are manufactured by Texas Instruments and carry Active product status. Selection between these parts depends on procurement and assembly process requirements.

Q: Why is the MC34074DR2G listed as a substitute if it is not a J-FET amplifier?

A: The MC34074DR2G is included as a functional alternative for applications where general-purpose amplifier performance is acceptable. This device provides compatible 14-SOIC packaging, 4-circuit configuration, and comparable gain bandwidth product (4.5 MHz). However, the MC34074DR2G uses a different input stage topology (not J-FET) and exhibits significantly different input bias current (100 nA versus 3 pA) and input offset voltage (1 mV versus 200 µV). This substitute is appropriate only for applications where J-FET input characteristics are not a design requirement.

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

A: The OP482GS carries MSL 1 (Unlimited) moisture sensitivity rating. Substitute parts should maintain equivalent or superior moisture sensitivity classification. The OP482GSZ, LF247DT, LF347DT, LF347M/NOPB, and LF347MX/NOPB all carry MSL 1 (Unlimited) rating. The MC34074DR2G also carries MSL 1 (Unlimited) rating. All recommended substitutes are ROHS3 Compliant and REACH Unaffected, meeting current regulatory requirements. Verification of these certifications is necessary for applications subject to regulatory compliance mandates.

Q: Can the OP482GS be substituted with a 2-circuit amplifier in an 8-pin package?

A: No. The OP482GS is a 4-circuit amplifier in a 14-SOIC package. Substitution with a 2-circuit device would require circuit redesign to accommodate the reduced number of amplifier stages. Package form factor differences (8-pin versus 14-pin) would necessitate PCB layout modifications. Such substitutions are outside the scope of direct component equivalencing and require full circuit re-evaluation.

Q: What is the operating temperature range consideration when selecting between OP482GS and LF347M/NOPB?

A: The OP482GS operates from -40°C to 85°C. The LF347M/NOPB operates from 0°C to 70°C. If the application requires operation below 0°C or above 70°C, the LF347M/NOPB is not suitable. The OP482GSZ maintains the -40°C to 85°C range and is the appropriate substitute for temperature-critical applications. The LF247DT extends the upper temperature limit to 105°C, which may be beneficial for high-temperature applications, though the lower temperature limit remains -40°C.

Q: Are there any supply voltage compatibility issues when substituting the OP482GS?

A: Yes. The OP482GS accepts supply voltages from 9 V to 36 V. The LF247DT and LF347DT operate at fixed 44 V supply. The LF347M/NOPB and LF347MX/NOPB accept 10 V to 36 V (minimum 10 V versus 9 V for OP482GS). The MC34074DR2G accepts 3 V to 44 V. If the application uses 9 V supply, only the OP482GSZ is a direct substitute. Other alternatives require verification that the application supply voltage is compatible with the substitute part's specified range.

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