OP42GS-REEL Equivalent & Substitute Parts

Part Overview

The OP42GS-REEL is a J-FET operational amplifier manufactured by Analog Devices Inc., configured as a single-circuit 8-SOIC surface mount device. This component is classified as obsolete, necessitating identification of equivalent and substitute parts for ongoing design requirements and production continuity. The OP42GS-REEL operates across a supply voltage range of 16V to 40V with a slew rate of 50V/µs and gain bandwidth product of 10 MHz, making it suitable for precision analog signal processing applications requiring low input bias current and low input offset voltage.

Key Parameters

Parameter	Value
Amplifier Type	J-FET
Number of Circuits	1
Package / Case	8-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
Slew Rate	50V/µs
Gain Bandwidth Product	10 MHz
Current - Input Bias	130 pA
Voltage - Input Offset	1.5 mV
Current - Supply	5.1 mA
Current - Output / Channel	33 mA
Voltage - Supply Span (Min)	16 V
Voltage - Supply Span (Max)	40 V
Operating Temperature	-40°C ~ 85°C
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the OP42GS-REEL is determined by compatibility across the following critical parameters: package type (8-SOIC surface mount), amplifier topology (J-FET or equivalent low-bias-current design), single-circuit configuration, and electrical performance specifications including slew rate, gain bandwidth product, input bias current, input offset voltage, supply current, output current capability, and supply voltage range.

The substitute parts are grouped into two categories:

Direct Equivalent (Identical Electrical Performance): OP42GSZ-RL maintains identical electrical specifications and J-FET topology, differing only in packaging format (Tape & Reel versus Reel) and product status (Active versus Obsolete).

Functional Alternatives (Compatible Electrical Performance within Application Range): TLC071 and TLC081 series devices from Texas Instruments provide general-purpose amplifier functionality in the same 8-SOIC package with compatible operating temperature ranges and supply voltage specifications. OPA137UA provides J-FET amplifier functionality with lower input bias current but reduced slew rate and gain bandwidth product.

Parameter Comparison

Parameter	OP42GS-REEL	OP42GSZ-RL	OPA137UA	TLC071AID	TLC071CD	TLC071CDR	TLC071ID	TLC071IDR	TLC081AID	TLC081AIDR	TLC081CD
Amplifier Type	J-FET	J-FET	J-FET	General Purpose	General Purpose	General Purpose	General Purpose	General Purpose	General Purpose	General Purpose	General Purpose
Number of Circuits	1	1	1	1	1	1	1	1	1	1	1
Package / Case	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC	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	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Slew Rate	50V/µs	50V/µs	3.5V/µs	19V/µs	19V/µs	19V/µs	19V/µs	19V/µs	19V/µs	19V/µs	19V/µs
Gain Bandwidth Product	10 MHz	10 MHz	1 MHz	10 MHz	10 MHz	10 MHz	10 MHz	10 MHz	10 MHz	10 MHz	10 MHz
Current - Input Bias	130 pA	130 pA	5 pA	1.5 pA	1.5 pA	1.5 pA	1.5 pA	1.5 pA	2 pA	2 pA	2 pA
Voltage - Input Offset	1.5 mV	1.5 mV	2.5 mV	390 µV	390 µV	390 µV	390 µV	390 µV	390 µV	390 µV	390 µV
Current - Supply	5.1 mA	5.1 mA	220 µA	2.1 mA	2.1 mA	2.1 mA	2.1 mA	2.1 mA	1.9 mA	1.9 mA	1.9 mA
Current - Output / Channel	33 mA	33 mA	60 mA	57 mA	57 mA	57 mA	57 mA	57 mA	57 mA	57 mA	57 mA
Voltage - Supply Span (Min)	16 V	16 V	4.5 V	4.5 V	4.5 V	4.5 V	4.5 V	4.5 V	4.5 V	4.5 V	4.5 V
Voltage - Supply Span (Max)	40 V	40 V	36 V	16 V	16 V	16 V	16 V	16 V	16 V	16 V	16 V
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 125°C	0°C ~ 70°C	0°C ~ 70°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	0°C ~ 70°C
Product Status	Obsolete	Active	Active	Active	Active	Active	Active	Active	Active	Active	Active
RoHS Status	Not specified	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Primary Substitute: OP42GSZ-RL

The OP42GSZ-RL is the direct equivalent to OP42GS-REEL, maintaining identical electrical specifications and J-FET amplifier topology. This part is currently in active production status with ROHS3 compliance and REACH unaffected certification. The OP42GSZ-RL differs only in packaging format (Tape & Reel versus Reel configuration). Selection of OP42GSZ-RL is appropriate for applications requiring exact electrical performance matching and is recommended as the primary replacement for obsolete OP42GS-REEL inventory.

Secondary Substitutes: TLC071 and TLC081 Series

The TLC071 and TLC081 series from Texas Instruments provide functional alternatives for applications where the maximum supply voltage requirement does not exceed 16V. These general-purpose amplifiers are available in multiple temperature grades and packaging formats, all with active product status and ROHS3 compliance. The TLC071 and TLC081 devices offer improved input offset voltage (390 µV versus 1.5 mV) and lower supply current consumption compared to OP42GS-REEL. Selection from this series is appropriate when supply voltage constraints permit operation within the 4.5V to 16V range.

Tertiary Substitute: OPA137UA

The OPA137UA from Texas Instruments is a J-FET amplifier with superior input bias current performance (5 pA versus 130 pA). However, this device exhibits reduced slew rate (3.5V/µs versus 50V/µs) and lower gain bandwidth product (1 MHz versus 10 MHz). The OPA137UA is suitable only for applications where low input bias current is critical and bandwidth requirements are less stringent than the original OP42GS-REEL specification. This part is active and ROHS3 compliant.

Frequently Asked Questions (FAQ)

Q: Can OP42GSZ-RL be used as a direct replacement for OP42GS-REEL?

A: Yes. OP42GSZ-RL is electrically identical to OP42GS-REEL across all specified parameters including slew rate, gain bandwidth product, input bias current, input offset voltage, supply current, output current, and supply voltage range. The only difference is packaging format. OP42GSZ-RL is currently in active production.

Q: What is the primary limitation when substituting TLC071 or TLC081 series for OP42GS-REEL?

A: The maximum supply voltage for TLC071 and TLC081 devices is 16V, whereas OP42GS-REEL operates up to 40V. Applications requiring supply voltages above 16V cannot use these substitutes. Additionally, slew rate is reduced from 50V/µs to 19V/µs.

Q: Are all substitute parts available in 8-SOIC surface mount package?

A: Yes. All listed substitute parts are available in 8-SOIC (0.154", 3.90mm Width) surface mount package, ensuring mechanical and electrical compatibility with existing PCB layouts designed for OP42GS-REEL.

Q: What is the difference between TLC071 and TLC081 devices?

A: TLC071 and TLC081 devices share identical electrical specifications. The primary differences are input bias current (1.5 pA for TLC071 versus 2 pA for TLC081) and supply current (2.1 mA for TLC071 versus 1.9 mA for TLC081). Both are available in multiple temperature grades and packaging formats.

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

A: TLC071 and TLC081 series devices offer the lowest input bias current at 1.5 pA and 2 pA respectively, compared to 130 pA for OP42GS-REEL. OPA137UA provides 5 pA input bias current, which is lower than OP42GS-REEL but higher than TLC071/TLC081 devices.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts carry ROHS3 compliance certification. OP42GS-REEL does not specify RoHS status as it is an obsolete product.

Q: What operating temperature ranges are available among substitute parts?

A: TLC071ID, TLC071IDR, TLC081AID, and TLC081AIDR support -40°C to 125°C. TLC071AID and TLC081AID support -40°C to 125°C. TLC071CD, TLC071CDR, and TLC081CD support 0°C to 70°C. OPA137UA supports -40°C to 85°C, matching the original OP42GS-REEL specification.

Q: Can OPA137UA be used in high-speed applications requiring 50V/µs slew rate?

A: No. OPA137UA has a slew rate of 3.5V/µs, which is significantly lower than the 50V/µs specification of OP42GS-REEL. This device is unsuitable for applications requiring high-speed signal processing or fast transient response.

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