AD8021ARM Equivalent & Substitute Parts

Part Overview

The AD8021ARM is a voltage feedback amplifier manufactured by Analog Devices Inc., designed for single-circuit applications in 8-MSOP surface mount packaging. This device operates across a supply voltage range of 4.5V to 24V with a slew rate of 460V/µs and -3dB bandwidth of 560 MHz. The AD8021ARM is classified as obsolete, necessitating identification of equivalent and substitute components for new designs and ongoing production requirements. Substitute parts must maintain functional compatibility while meeting current product availability and compliance standards.

Substiute Parts

AD8021ARM

Analog Devices Inc.In Stock: 1727AD8021ARM Datasheet

Current PartRFQ

AD8021ARMZ

Analog Devices Inc.In Stock: 2299AD8021ARMZ Datasheet

DirectRFQ

ADA4895-1ARZ

Analog Devices Inc.In Stock: 2196ADA4895-1ARZ Datasheet

SimilarRFQ

ADA4897-1ARZ

Analog Devices Inc.In Stock: 1834ADA4897-1ARZ Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the AD8021ARM is determined by the following critical parameters: amplifier type (voltage feedback), number of circuits (single), slew rate (460V/µs), -3dB bandwidth (560 MHz), supply voltage range (4.5V to 24V), and mounting type (surface mount).

The substitute parts are grouped into two categories:

Direct Equivalent: AD8021ARMZ maintains identical electrical specifications and packaging, differing only in product status (active versus obsolete) and packaging format (tube versus unspecified).

Functional Alternatives: ADA4895-1ARZ and ADA4897-1ARZ provide alternative amplifier architectures with different electrical characteristics and package types (8-SOIC versus 8-MSOP). These alternatives require circuit design evaluation due to differences in supply voltage range, bandwidth, slew rate, and output type.

Parameter Comparison

Engineering Selection Recommendations

AD8021ARMZ is the primary direct substitute for AD8021ARM. Both devices share identical electrical specifications, amplifier architecture, and packaging format. AD8021ARMZ carries active product status with ROHS3 compliance and REACH unaffected certification, making it suitable for new designs and production continuity. The only distinction is packaging format (tube), which does not affect electrical performance or circuit compatibility.

ADA4895-1ARZ and ADA4897-1ARZ are functional alternatives requiring circuit design review. These devices operate within a reduced supply voltage range (3V to 10V versus 4.5V to 24V), feature different bandwidth and slew rate characteristics, and utilize 8-SOIC packaging instead of 8-MSOP. ADA4895-1ARZ is a general-purpose amplifier with higher slew rate (943V/µs) and output current capability (116 mA). ADA4897-1ARZ is a voltage feedback amplifier with rail-to-rail output and lower slew rate (120V/µs). Both alternatives provide extended operating temperature range (-40°C to 125°C) and current product status with full compliance certifications.

Selection between these alternatives depends on specific circuit requirements regarding supply voltage, bandwidth, slew rate, and package footprint compatibility.

Frequently Asked Questions (FAQ)

Q: Can AD8021ARMZ be used as a direct replacement for AD8021ARM?

A: Yes. AD8021ARMZ provides identical electrical specifications and packaging format. The primary difference is product status (active versus obsolete) and packaging delivery method (tube). No circuit modifications are required.

Q: What are the key differences between AD8021ARM and ADA4897-1ARZ?

A: The devices differ in supply voltage range (4.5V–24V versus 3V–10V), slew rate (460V/µs versus 120V/µs), -3dB bandwidth (560 MHz versus 230 MHz), package type (8-MSOP versus 8-SOIC), and output type (standard versus rail-to-rail). Circuit design evaluation is necessary before substitution.

Q: Can ADA4895-1ARZ replace AD8021ARM in high-frequency applications?

A: ADA4895-1ARZ has lower -3dB bandwidth (236 MHz versus 560 MHz) and operates within a reduced supply voltage range (3V–10V versus 4.5V–24V). It is not suitable for applications requiring the full bandwidth and supply voltage specifications of AD8021ARM.

Q: Are all substitute parts RoHS and REACH compliant?

A: AD8021ARMZ, ADA4895-1ARZ, and ADA4897-1ARZ are all ROHS3 compliant and REACH unaffected. The original AD8021ARM does not list compliance certifications.

Q: What packaging considerations apply when substituting AD8021ARM?

A: AD8021ARM and AD8021ARMZ both use 8-MSOP packaging (0.118", 3.00mm width). ADA4895-1ARZ and ADA4897-1ARZ use 8-SOIC packaging (0.154", 3.90mm width), requiring PCB layout modifications and potential footprint redesign.

Q: Which substitute part has the lowest power consumption?

A: ADA4895-1ARZ and ADA4897-1ARZ both draw 3 mA supply current, compared to 7.8 mA for AD8021ARM and AD8021ARMZ. However, these alternatives operate within a narrower supply voltage range and lower bandwidth specification.