AD8021AR Equivalent & Substitute Parts

Part Overview

The AD8021AR is a voltage feedback amplifier integrated circuit manufactured by Analog Devices Inc., designed for linear amplification applications. This device features a single amplification circuit in an 8-SOIC surface mount package with a slew rate of 460V/µs and -3dB bandwidth of 560 MHz. The AD8021AR is classified as obsolete, necessitating identification of equivalent and substitute components for new designs and ongoing production requirements. Active alternatives with compatible or enhanced electrical characteristics are available from the same manufacturer.

Substiute Parts

AD8021AR

Analog Devices Inc.In Stock: 3620AD8021AR Datasheet

Current PartRFQ

AD8021ARZ

Analog Devices Inc.In Stock: 6781AD8021ARZ Datasheet

DirectRFQ

ADA4895-1ARZ

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

SimilarRFQ

ADA4897-1ARZ

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

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the AD8021AR is determined by compatibility across the following critical parameters: package type (8-SOIC surface mount), number of circuits (single channel), amplifier topology (voltage feedback), and electrical performance specifications including slew rate, bandwidth, supply voltage range, and operating temperature.

The AD8021ARZ represents a direct equivalent substitute, maintaining identical electrical specifications and amplifier type while offering active product status and improved availability. This part is the preferred direct replacement.

The ADA4895-1ARZ and ADA4897-1ARZ are similar topology alternatives that share the same 8-SOIC package and surface mount configuration. These parts differ in amplifier classification and electrical performance characteristics, requiring application-level evaluation based on specific circuit requirements.

Substitution logic is based on the following allowed parameters:

• Package compatibility: 8-SOIC form factor
• Mounting type: Surface mount
• Circuit count: Single channel
• Amplifier type: Voltage feedback topology
• Electrical performance envelope: Slew rate, bandwidth, bias current, offset voltage, supply current, output current capability, supply voltage range, and operating temperature range

Parameter Comparison

Engineering Selection Recommendations

AD8021ARZ is the direct equivalent substitute for the obsolete AD8021AR. This part maintains identical electrical specifications, amplifier topology, and package configuration while offering active product status and ROHS3 compliance. The AD8021ARZ is available in tube packaging and represents the primary replacement option for existing AD8021AR applications.

ADA4897-1ARZ is a compatible alternative for applications where the voltage feedback amplifier topology is required and operating temperature range can be extended to 125°C. This part offers improved input offset voltage (28 µV versus 400 µV), lower supply current (3 mA versus 7.8 mA), and extended temperature operation. The ADA4897-1ARZ operates within a reduced supply voltage range (3V to 10V versus 4.5V to 24V) and exhibits lower slew rate (120 V/µs versus 460 V/µs) and bandwidth (230 MHz versus 560 MHz). ROHS3 compliance and REACH unaffected status are confirmed.

ADA4895-1ARZ is a general purpose amplifier alternative with rail-to-rail output capability. This part offers the highest slew rate (943 V/µs) among the substitute options and improved output current capability (116 mA versus 70 mA). The ADA4895-1ARZ operates within a reduced supply voltage range (3V to 10V) and exhibits lower bandwidth (236 MHz) compared to the AD8021AR. ROHS3 compliance and REACH unaffected status are confirmed.

Selection between substitute parts depends on application-specific requirements for supply voltage range, slew rate, bandwidth, and operating temperature. All substitute parts share identical package configuration and surface mount characteristics, enabling direct PCB-level replacement.

Frequently Asked Questions (FAQ)

Q: Can the AD8021ARZ be used as a direct replacement for the AD8021AR?

A: Yes. The AD8021ARZ is a direct equivalent substitute with identical electrical specifications, amplifier type, and package configuration. The primary difference is product status (active versus obsolete) and packaging format (tube versus unspecified). All electrical parameters, including slew rate (460 V/µs), bandwidth (560 MHz), supply voltage range (4.5V to 24V), and operating temperature (-40°C to 85°C), are identical.

Q: What are the key differences between the AD8021AR and ADA4897-1ARZ?

A: Both parts are voltage feedback amplifiers in 8-SOIC packages. The ADA4897-1ARZ offers improved input offset voltage (28 µV versus 400 µV), lower supply current (3 mA versus 7.8 mA), and extended operating temperature range (-40°C to 125°C versus -40°C to 85°C). However, the ADA4897-1ARZ operates within a narrower supply voltage range (3V to 10V versus 4.5V to 24V) and exhibits lower slew rate (120 V/µs versus 460 V/µs) and bandwidth (230 MHz versus 560 MHz).

Q: Is the ADA4895-1ARZ suitable for applications requiring voltage feedback amplification?

A: The ADA4895-1ARZ is classified as a general purpose amplifier rather than a voltage feedback amplifier. While it shares the same 8-SOIC package and surface mount configuration, its amplifier topology differs from the AD8021AR. The ADA4895-1ARZ features rail-to-rail output capability and higher slew rate (943 V/µs) but operates within a reduced supply voltage range (3V to 10V) and exhibits lower bandwidth (236 MHz).

Q: Are all substitute parts RoHS3 compliant?

A: The AD8021ARZ, ADA4895-1ARZ, and ADA4897-1ARZ are all ROHS3 compliant. The original AD8021AR does not specify RoHS status in the provided data.

Q: Can these parts be used interchangeably on the same PCB?

A: All substitute parts share identical 8-SOIC package dimensions (0.154", 3.90mm width) and surface mount configuration, enabling direct PCB-level replacement without layout modifications. However, electrical performance differences (slew rate, bandwidth, supply voltage range, and operating temperature) require circuit-level evaluation to ensure application compatibility.

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

A: All parts, including the AD8021AR, AD8021ARZ, ADA4895-1ARZ, and ADA4897-1ARZ, have a Moisture Sensitivity Level (MSL) of 1 (Unlimited), indicating no moisture sensitivity restrictions.

Q: Which substitute part offers the best performance for high-speed applications?

A: The ADA4895-1ARZ offers the highest slew rate (943 V/µs) among the substitute options. However, it is classified as a general purpose amplifier rather than a voltage feedback amplifier. For voltage feedback topology with high slew rate, the AD8021ARZ maintains the original 460 V/µs specification.

Q: What is the supply voltage compatibility range for each part?

A: The AD8021AR and AD8021ARZ operate with supply voltages from 4.5V to 24V. The ADA4895-1ARZ and ADA4897-1ARZ operate with supply voltages from 3V to 10V. Applications requiring supply voltages above 10V must use the AD8021AR or AD8021ARZ.