OP420122Z Equivalent & Substitute Parts

Part Overview

The OP420122Z is a general purpose operational amplifier integrated circuit manufactured by Analog Devices Inc. This device contains 4 amplifier circuits in an 8-CERDIP through-hole package and is designed for linear amplification applications. The OP420122Z is classified as obsolete, making identification of functionally compatible substitute components necessary for ongoing system support, maintenance, and new design implementations where legacy compatibility is required.

Substiute Parts

OP420122Z

Analog Devices Inc.In Stock: 1220OP420122Z Datasheet

Current PartRFQ

OP42EZ

Analog Devices Inc.In Stock: 1907OP42EZ Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution analysis for the OP420122Z is based on the following electrical and mechanical compatibility criteria:

Package Compatibility: Both the main part and substitute must utilize the 8-CDIP (0.300", 7.62mm) through-hole package format to ensure mechanical fit and pinout alignment in existing circuit board layouts.

Mounting Type: Through-hole mounting compatibility is required for direct replacement in legacy designs.

Manufacturer Continuity: Analog Devices Inc. maintains both the main part and identified substitute, ensuring consistent design standards and documentation availability.

Electrical Parameter Ranges: Substitute parts must operate within compatible voltage supply spans and temperature ranges to function in the intended application environment.

The OP42EZ is identified as a substitute part based on shared package geometry, through-hole mounting compatibility, and manufacturer origin. However, this substitute represents a different amplifier topology (J-FET versus general purpose) with significantly different electrical characteristics.

Parameter Comparison

Engineering Selection Recommendations

Product Status Consideration: The OP420122Z is classified as obsolete, while the OP42EZ maintains active product status from Analog Devices Inc. Active status ensures ongoing availability, technical support, and manufacturing consistency.

Compliance and Certifications: The OP42EZ is RoHS3 compliant and REACH unaffected, providing regulatory alignment with current environmental and safety standards. The OP420122Z compliance documentation is not specified in available parameters.

Mechanical Compatibility: Both components share identical package geometry (8-CDIP, 0.300" / 7.62mm) and through-hole mounting type, enabling direct physical substitution in existing printed circuit board layouts without modification.

Electrical Differences: The OP42EZ exhibits substantially higher performance specifications across multiple parameters, including slew rate (58 V/µs versus 0.5 V/µs), gain bandwidth product (10 MHz versus 150 kHz), and lower input bias current (80 pA versus 12 nA). These differences reflect the J-FET topology of the substitute versus the general purpose design of the original part. Circuit redesign and performance validation are required when substituting the OP42EZ for the OP420122Z.

Temperature Range: The OP420122Z operates across -55°C to 125°C, while the OP42EZ operates across -25°C to 85°C. Applications requiring extended low-temperature operation below -25°C cannot use the OP42EZ as a direct substitute.

Supply Voltage: The OP420122Z requires a fixed 18 V supply span, while the OP42EZ accepts 16 V to 40 V. Verify that existing power supply configurations are compatible with the substitute device.

Frequently Asked Questions (FAQ)

Q: Can the OP42EZ be used as a direct pin-for-pin replacement for the OP420122Z?

A: The OP42EZ and OP420122Z share the same 8-CDIP package and through-hole mounting format, enabling physical installation in the same circuit board footprint. However, the OP42EZ contains only 1 amplifier circuit compared to the OP420122Z's 4 circuits, and exhibits significantly different electrical characteristics. Circuit redesign is required for functional substitution.

Q: What are the key electrical differences between these two parts?

A: The OP420122Z is a general purpose amplifier with a slew rate of 0.5 V/µs and gain bandwidth product of 150 kHz. The OP42EZ is a J-FET amplifier with a slew rate of 58 V/µs and gain bandwidth product of 10 MHz. The OP42EZ also features lower input bias current (80 pA versus 12 nA) and lower input offset voltage (300 µV versus 1 mV). These differences make the OP42EZ suitable for high-speed, low-noise applications where the OP420122Z would not be appropriate.

Q: Is the OP42EZ suitable for applications requiring the full -55°C to 125°C temperature range?

A: No. The OP42EZ operates only across -25°C to 85°C. Applications requiring operation below -25°C or above 85°C cannot use the OP42EZ as a substitute for the OP420122Z.

Q: What supply voltage range does each part require?

A: The OP420122Z requires a fixed 18 V supply span. The OP42EZ accepts a variable supply voltage range from 16 V to 40 V. Verify that your power supply configuration is compatible with the substitute device before implementation.

Q: How many amplifier circuits does each part contain?

A: The OP420122Z contains 4 independent amplifier circuits in a single 8-CDIP package. The OP42EZ contains only 1 amplifier circuit. Applications requiring 4 amplifiers cannot be satisfied by a single OP42EZ device.

Q: What is the product status of each part?

A: The OP420122Z is classified as obsolete. The OP42EZ is classified as active, ensuring ongoing availability and technical support from Analog Devices Inc.

Q: Are both parts compliant with current environmental regulations?

A: The OP42EZ is RoHS3 compliant and REACH unaffected. Compliance information for the OP420122Z is not specified in available technical parameters.