OP15GH Equivalent & Substitute Parts

Part Overview

The OP15GH is a J-FET operational amplifier manufactured by Analog Devices Inc., housed in a TO-5 metal can package with a single amplifier circuit. This device is classified as obsolete, making equivalent substitute parts necessary for ongoing design support and component procurement. The OP15GH operates across a 20V to 30V supply voltage range with a slew rate of 9V/µs and gain bandwidth product of 5.4 MHz, serving applications requiring low input bias current and low input offset voltage characteristics typical of J-FET amplifier designs.

Substiute Parts

OP15GH

Analog Devices Inc.In Stock: 1080OP15GH Datasheet

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LF356H

Texas InstrumentsIn Stock: 1588LF356H Datasheet

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LF356H/NOPB

Texas InstrumentsIn Stock: 1987LF356H/NOPB Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the OP15GH are selected based on functional equivalence within the J-FET operational amplifier category. The primary substitution criteria are:

Functional Compatibility Parameters:

• Amplifier Type: J-FET architecture
• Number of Circuits: Single circuit configuration
• Operating Temperature Range: 0°C to 70°C
• Mounting Type: Through Hole
• Supply Voltage Compatibility: Minimum 20V to 30V span

Performance Characteristics:

• Slew Rate: Substitute must meet or exceed 9V/µs
• Gain Bandwidth Product: Substitute must meet or exceed 5.4 MHz
• Input Bias Current: Substitute must be 60 pA or lower
• Input Offset Voltage: Substitute must be 500 µV or lower
• Supply Current: Substitute must be 2.8 mA or lower

The LF356H and LF356H/NOPB from Texas Instruments satisfy these substitution criteria. Both devices are active J-FET operational amplifiers with single circuit configurations, through-hole mounting, and compatible operating temperature ranges. These substitutes exceed the performance specifications of the OP15GH in slew rate (12V/µs), maintain comparable gain bandwidth product (5 MHz), and provide superior input bias current characteristics (30 pA).

Parameter Comparison

Engineering Selection Recommendations

The LF356H and LF356H/NOPB are functionally equivalent substitutes for the obsolete OP15GH. Both Texas Instruments devices are active products with established supply chains, ensuring long-term component availability. The LF356H/NOPB variant carries RoHS3 compliance and REACH unaffected status, providing regulatory alignment for applications subject to environmental standards.

Selection Criteria:

For applications requiring RoHS3 compliance and REACH documentation, the LF356H/NOPB is the appropriate selection. For applications without specific regulatory requirements, either LF356H or LF356H/NOPB may be used interchangeably, as both devices share identical electrical specifications and performance characteristics.

Both substitute parts operate at the maximum supply voltage of 30V, which aligns with the OP15GH maximum specification. Applications designed for the full 20V to 30V supply range of the OP15GH must account for the LF356H/LF356H/NOPB minimum supply voltage of 30V, requiring circuit redesign or supply voltage adjustment where applicable.

The TO-99-8 metal can package of the LF356H and LF356H/NOPB differs from the TO-5-8 package of the OP15GH. PCB layout modifications are necessary to accommodate the different package footprint.

Frequently Asked Questions (FAQ)

Q: Can the LF356H directly replace the OP15GH without circuit modifications?

A: The LF356H and LF356H/NOPB are electrically equivalent in function and performance. However, package differences require PCB layout modifications. The TO-99-8 package of the LF356H differs from the TO-5-8 package of the OP15GH, necessitating socket or footprint redesign. Additionally, the minimum supply voltage specification of 30V for the LF356H differs from the OP15GH minimum of 20V; circuits designed for 20V operation require supply voltage adjustment.

Q: What are the key performance differences between the OP15GH and LF356H?

A: The LF356H provides superior slew rate performance at 12V/µs compared to the OP15GH at 9V/µs. The LF356H also offers lower input bias current at 30 pA versus 60 pA for the OP15GH. The OP15GH provides lower input offset voltage at 500 µV compared to 3 mV for the LF356H. The LF356H operates at higher supply current of 5 mA versus 2.8 mA for the OP15GH.

Q: Is the LF356H/NOPB different from the LF356H?

A: The LF356H and LF356H/NOPB share identical electrical specifications and performance characteristics. The /NOPB designation indicates lead-free plating and RoHS3 compliance. Selection between these variants depends on regulatory and environmental requirements specific to the application.

Q: What is the moisture sensitivity level for these devices?

A: Both the OP15GH and substitute parts LF356H and LF356H/NOPB carry MSL 1 (Unlimited) classification, indicating no moisture sensitivity restrictions during storage or handling.

Q: Are there package compatibility considerations for PCB design?

A: Yes. The OP15GH uses a TO-5-8 metal can package, while the LF356H and LF356H/NOPB use a TO-99-8 metal can package. Although both are through-hole metal can packages, the physical dimensions and pin configurations differ. PCB footprints must be redesigned or appropriate adapters must be used for component substitution.

Q: What supply voltage range should be used when substituting with the LF356H?

A: The LF356H operates at a fixed 30V supply voltage specification, whereas the OP15GH operates across 20V to 30V. Circuits originally designed for 20V operation must be modified to operate at 30V when using the LF356H as a substitute.