NJM084D# Equivalent & Substitute Parts

Part Overview

The NJM084D# is a J-FET input operational amplifier manufactured by Nisshinbo Micro Devices Inc., configured as a 4-circuit linear amplifier in 14-DIP packaging. This device is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing design support and production continuity. The J-FET input architecture provides high input impedance and low input bias current characteristics suitable for precision signal conditioning applications.

Substiute Parts

NJM084D#

Nisshinbo Micro Devices Inc.In Stock: 1195NJM084D# Datasheet

Current PartRFQ

OP467GPZ

Analog Devices Inc.In Stock: 1446OP467GPZ Datasheet

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OP470GPZ

Analog Devices Inc.In Stock: 1341OP470GPZ Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the NJM084D# is determined by the following critical parameters:

Package Compatibility: All substitute parts must use 14-DIP through-hole packaging with 0.300" (7.62mm) pitch to ensure direct socket compatibility.

Circuit Configuration: The device contains 4 independent amplifier circuits, requiring substitutes to maintain this quad-channel architecture.

Supply Voltage Range: The NJM084D# operates across 8V to 36V supply span. Substitute parts must support this range or a compatible subset that includes the intended application voltage.

Operating Temperature Range: The -40°C to 85°C specification must be maintained or exceeded by substitute devices.

Input Bias Current Characteristic: The J-FET input architecture produces extremely low input bias current (30 pA). While general-purpose amplifiers may have higher input bias currents, they remain functionally compatible for most applications due to their superior performance in other parameters.

The identified substitutes (OP467GPZ and OP470GPZ) satisfy package, circuit count, supply voltage, and temperature requirements. Both are manufactured by Analog Devices Inc. and maintain active product status with modern compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

OP467GPZ Selection: This substitute is appropriate for applications requiring enhanced bandwidth and slew rate performance. The OP467GPZ delivers 350 V/µs slew rate and 28 MHz gain bandwidth product, representing significant performance improvement over the NJM084D#. The higher input bias current (150 nA) and input offset voltage (200 µV) are acceptable trade-offs in general-purpose signal conditioning circuits. Active product status and ROHS3 compliance ensure long-term availability and regulatory alignment.

OP470GPZ Selection: This substitute provides moderate performance enhancement with 6 MHz gain bandwidth product and 3 V/µs slew rate, closely matching the NJM084D# performance envelope. The OP470GPZ exhibits lower input bias current (15 nA) compared to OP467GPZ, making it suitable for applications sensitive to input bias current effects. Active product status and ROHS3 compliance support production continuity.

Compliance Considerations: Both substitute parts maintain ROHS3 compliance, REACH unaffected status, and MSL 1 rating, ensuring compatibility with modern manufacturing and environmental requirements. The NJM084D# is RoHS Compliant (original standard), while substitutes meet the more stringent ROHS3 specification.

Supply Voltage Compatibility: Both substitutes operate at 9V minimum supply voltage, compared to the NJM084D# 8V minimum. Applications operating at 8V supply voltage require verification that substitute parts function within specified parameters at the intended supply voltage.

Frequently Asked Questions (FAQ)

Q: Can OP467GPZ and OP470GPZ be used interchangeably with NJM084D#?

A: Both parts are pin-compatible 14-DIP devices with identical circuit counts and supply voltage ranges. Direct socket substitution is mechanically and electrically feasible. Selection between OP467GPZ and OP470GPZ depends on application bandwidth and slew rate requirements.

Q: What is the primary difference between OP467GPZ and OP470GPZ?

A: The OP467GPZ provides higher bandwidth (28 MHz) and slew rate (350 V/µs) performance, while OP470GPZ offers moderate bandwidth (6 MHz) and slew rate (3 V/µs) with lower input bias current (15 nA). OP470GPZ performance characteristics more closely approximate the NJM084D# specification envelope.

Q: Are there supply voltage compatibility issues when substituting?

A: The NJM084D# minimum supply voltage is 8V, while both substitutes require 9V minimum. Applications operating at 8V supply voltage must be evaluated to confirm substitute part operation within specified parameters at the lower voltage.

Q: Do the substitute parts maintain the same input bias current characteristics?

A: No. The NJM084D# J-FET input architecture produces 30 pA input bias current. The OP467GPZ exhibits 150 nA input bias current, and OP470GPZ exhibits 15 nA input bias current. Applications with high-impedance signal sources may require circuit design adjustments to accommodate higher input bias current.

Q: Are compliance certifications equivalent between NJM084D# and substitute parts?

A: The NJM084D# is RoHS Compliant (original standard). Both OP467GPZ and OP470GPZ are ROHS3 Compliant, representing a more stringent environmental standard. Both substitutes maintain REACH unaffected status and MSL 1 rating, ensuring regulatory compatibility.

Q: What packaging format is used for the substitute parts?

A: Both OP467GPZ and OP470GPZ are supplied in 14-PDIP (plastic dual in-line package) format with 0.300" (7.62mm) pitch, identical to the NJM084D# 14-DIP package. Through-hole mounting compatibility is maintained.