AD8228ARMZ Equivalent & Substitute Parts

Part Overview

The AD8228ARMZ is an instrumentation amplifier manufactured by Analog Devices Inc., designed for precision signal conditioning applications. This single-circuit device operates across a wide supply voltage range of 4.6 V to 36 V and delivers low input offset voltage of 90 µV with minimal input bias current of 500 pA. The part is classified as Active product status and is RoHS3 compliant with unlimited moisture sensitivity rating (MSL 1). Substitute parts are identified when equivalent functional performance can be achieved within the same package footprint and mounting technology while maintaining compliance certifications and operational temperature ranges.

Substiute Parts

AD8228ARMZ

Analog Devices Inc.In Stock: 1191AD8228ARMZ Datasheet

Current PartRFQ

ADA4622-2ARMZ

Analog Devices Inc.In Stock: 2352ADA4622-2ARMZ Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the AD8228ARMZ is determined by compatibility across the following critical parameters:

Package and Mounting Compatibility: Both the main part and substitute must utilize the 8-MSOP surface mount package with identical 0.118" (3.00mm) width to ensure direct PCB footprint compatibility without layout redesign.

Supply Voltage Range: The substitute must operate within the specified supply voltage window. The AD8228ARMZ operates from 4.6 V to 36 V minimum and maximum supply spans.

Compliance and Certifications: All substitute parts must maintain RoHS3 compliance, REACH unaffected status, and MSL 1 rating to satisfy regulatory and manufacturing requirements.

Operating Temperature Range: The substitute must support the full operating temperature range of -40°C to 85°C or exceed it.

Amplifier Architecture: While the AD8228ARMZ is an instrumentation amplifier, substitute parts may employ alternative amplifier topologies (such as J-FET operational amplifiers) provided they deliver equivalent functional performance in the target application circuit.

The ADA4622-2ARMZ meets these substitution criteria through identical package geometry, overlapping supply voltage capability, matching compliance certifications, and extended operating temperature range.

Parameter Comparison

Engineering Selection Recommendations

Package Compatibility: The AD8228ARMZ and ADA4622-2ARMZ share identical 8-MSOP package geometry with 0.118" (3.00mm) width, enabling direct PCB footprint substitution without layout modification.

Compliance Alignment: Both parts maintain ROHS3 compliance, REACH unaffected status, and MSL 1 moisture sensitivity rating, satisfying regulatory requirements for equivalent component selection.

Supply Voltage Consideration: The AD8228ARMZ operates across 4.6 V to 36 V, while the ADA4622-2ARMZ operates across 5 V to 30 V. Applications requiring supply voltages below 5 V or above 30 V are not compatible with the ADA4622-2ARMZ substitute.

Operating Temperature Range: The ADA4622-2ARMZ extends the upper operating temperature limit to 125°C compared to the AD8228ARMZ at 85°C, providing enhanced thermal performance for elevated-temperature environments.

Active Product Status: Both parts maintain Active product status, ensuring continued availability and manufacturing support.

Frequently Asked Questions (FAQ)

Q: Can the ADA4622-2ARMZ directly replace the AD8228ARMZ on the same PCB?

A: Direct PCB footprint replacement is possible due to identical 8-MSOP package geometry. However, circuit design verification is required to confirm functional compatibility, as the ADA4622-2ARMZ is a dual-channel J-FET amplifier with different electrical characteristics than the single-channel instrumentation amplifier topology of the AD8228ARMZ.

Q: What is the primary difference between these two parts?

A: The AD8228ARMZ is a single-circuit instrumentation amplifier, while the ADA4622-2ARMZ is a dual-circuit J-FET operational amplifier with rail-to-rail output capability. The ADA4622-2ARMZ offers significantly higher slew rate (23 V/µs versus 2.5 V/µs) and bandwidth (15.5 MHz versus 650 kHz).

Q: Are there supply voltage limitations when substituting?

A: Yes. The ADA4622-2ARMZ operates from 5 V to 30 V, while the AD8228ARMZ operates from 4.6 V to 36 V. Applications requiring supply voltages below 5 V or above 30 V cannot use the ADA4622-2ARMZ as a substitute.

Q: Do both parts meet the same regulatory requirements?

A: Yes. Both the AD8228ARMZ and ADA4622-2ARMZ are ROHS3 compliant, REACH unaffected, and carry MSL 1 moisture sensitivity rating.

Q: What is the temperature operating range difference?

A: The AD8228ARMZ operates from -40°C to 85°C, while the ADA4622-2ARMZ operates from -40°C to 125°C. The ADA4622-2ARMZ provides extended high-temperature capability.

Q: Can I use only one channel of the ADA4622-2ARMZ if I need a single amplifier?

A: The ADA4622-2ARMZ contains two independent amplifier circuits. Single-channel operation is possible by utilizing one circuit and leaving the second circuit unused or configured as needed for the application.

Q: Are the input bias current specifications compatible?

A: The input bias currents differ significantly. The AD8228ARMZ has 500 pA input bias current, while the ADA4622-2ARMZ has 2 pA input bias current. Applications sensitive to input bias current must account for this 250-fold difference in circuit design.